Олександр Іщенко: Натхненно пізнавав – натхненно навчав
The Ukrainian school of organic dye chemistry has long received worldwide recognition. Among the scientists whose achievements embody this success is Academician Oleksandr Oleksandrovych Ishchenko. Over more than half a century of fruitful research at the Department of Color and Structure of Organic...
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| author | Kulinich, Andrii V. |
| author_facet | Kulinich, Andrii V. |
| author_institution_txt_mv | [
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"author": "Andrii V. Kulinich",
"institution": "Institute of Organic Chemistry of the National Academy of Sciences of Ukraine",
"orcid": ""
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| author_sort | Kulinich, Andrii V. |
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| container_title | Журнал органічної та фармацевтичної хімії |
| container_volume | 23 |
| datestamp_date | 2026-08-22T19:32:42Z |
| description | The Ukrainian school of organic dye chemistry has long received worldwide recognition. Among the scientists whose achievements embody this success is Academician Oleksandr Oleksandrovych Ishchenko. Over more than half a century of fruitful research at the Department of Color and Structure of Organic Compounds of the Institute of Organic Chemistry of the National Academy of Sciences of Ukraine, he laid the foundations for the rational design of functional dyes for light-energy conversion, particularly for various laser technologies; became one of the pioneers of polymethine ion-pair photonics; developed methodological approaches to the study of electronic absorption and fluorescence spectra using the method of moments, which provided new insights into the electronic structure of organic chromophores; and made a significant contribution to the systematic study and interpretation of the solvatochromism of polymethines of different types. The driving force behind all these achievements was his enduring passion for science — a deep desire to learn and share knowledge with future generations of researchers.
  |
| doi_str_mv | 10.24959/ophcj.25.343780 |
| first_indexed | 2026-02-08T08:05:25Z |
| format | Article |
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ISSN 2308-8303 (Print) / 2518-1548 (Online) 36
Life Devoted to Science
http://ophcj.nuph.edu.ua
UDC 547.97:544.164:929
A. V. Kulinich
Institute of Organic Chemistry of the National Academy of Sciences of Ukraine,
5 Akademik Kuhar str., 02094 Kyiv, Ukraine
Oleksandr Ishchenko: And Gladly Would He Learn,
and Gladly Teach
Abstract
The Ukrainian school of organic dye chemistry has long received worldwide recognition. Among the scientists whose achieve-
ments embody this success is Academician Oleksandr Oleksandrovych Ishchenko. Over more than half a century of fruit-
ful research at the Department of Color and Structure of Organic Compounds of the Institute of Organic Chemistry of the
National Academy of Sciences of Ukraine, he laid the foundations for the rational design of functional dyes for light-energy
conversion, particularly for various laser technologies; became one of the pioneers of polymethine ion-pair photonics; de-
veloped methodological approaches to the study of electronic absorption and fluorescence spectra using the method of
moments, which provided new insights into the electronic structure of organic chromophores; and made a significant con-
tribution to the systematic study and interpretation of the solvatochromism of polymethines of different types. The driving
force behind all these achievements was his enduring passion for science – a deep desire to learn and share knowledge with
future generations of researchers.
Keywords: polymethine dyes; color theory; electronic structure; material science; history of chemistry
А. В. Кулініч
Інститут органічної хімії Національної академії наук України,
вул. Академіка Кухаря, 5, м. Київ, 02094, Україна
Олександр Іщенко: Натхненно пізнавав – натхненно навчав
Анотація
Українська школа органічних барвників давно здобула світове визнання. Серед учених, чиї досягнення уособлюють
цей успіх, – академік НАН України Олександр Олександрович Іщенко. За понад півстоліття плідної наукової праці у від-
ділі кольору та будови органічних сполук Інституту органічної хімії НАН України він заклав основи цілеспрямованого
дизайну функціональних барвників для перетворювачів світлової енергії, насамперед для різноманітних лазерних
технологій; став одним із піонерів фотоніки іонних пар поліметинів; розробив методологічні підходи до дослідження
електронних спектрів поглинання та флуоресценції із застосуванням методу моментів, що дозволило отримати нову
інформацію про електронну будову органічних хромофорів; зробив вагомий внесок у раціональне дослідження та ін-
терпретацію сольватохромії поліметинів різної природи. Ключовим рушієм цього успіху було його незмінне натхнен-
ня наукою, прагнення пізнавати нове й передавати знання майбутнім поколінням науковців.
Ключові слова: поліметинові барвники; теорія кольору; електронна будова; матеріалознавство; історія хімії
Citation: Kulinich, A. V. Oleksandr Ishchenko: And Gladly Would He Learn, and Gladly Teach. Journal of Organic and Pharmaceutical
Chemistry 2025, 23 (3), 36 – 42.
https://doi.org/10.24959/ophcj.25.343780
Received: 26 August 2025; Revised: 14 September 2025; Accepted: 19 September 2025
Copyright© 2025, A. V. Kulinich. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0).
Funding: The author received no specific funding for this work.
Conflict of interests: The author has no conflict of interests to declare.
ISSN 2308-8303 (Print) / 2518-1548 (Online) 37
Journal of Organic and Pharmaceutical Chemistry 2025, 23 (3)
■ Early Life and Education
Oleksandr Oleksandrovych Ishchenko was born
on August 26, 1950, in Piskivka, Kyiv Oblast,
Ukraine. Soon afterward, the family of the future
scientist moved to Kyiv, which from then on be-
came his lifelong home.
His father, Oleksandr Trokhymovych, had just
retired from military service and was working
as an engineer while pursuing higher education
through evening studies. His mother, Larysa Hry-
horivna, was a philologist and university lecturer.
In the courtyards of his Kyiv childhood, one
of Oleksandr Ishchenko’s first lifelong passions
began to take shape – he became an ardent sup-
porter of the Kyiv football club Dynamo. Later,
during his student years (1968 – 1973) at the Fa-
culty of Chemistry of Taras Shevchenko Kyiv Sta-
te University, he developed other, more active
and creative interests – travel and photography,
and later, filming his family – his wife Valentyna,
also a chemist, and son Yevgen – with a home
movie camera. Together with friends, Oleksandr
set out on hiking trips to the Carpathians, jour-
neys across the lakes of Karelia, and rafting ex-
peditions along the Chusovaya River in the Urals.
Yet all these pursuits filled only the time left free
from the main passion of his life – science.
Oleksandr Ishchenko was among the best stu-
dents of his year. From the very beginning of his
studies, he displayed a strong enthusiasm for
scientific and creative work. It was this passion
that led him to approach Mykhailo Kornilov and
ask him to become his research supervisor. At that
time, Prof. Kornilov was deeply engaged with a ra-
pidly developing method of physicochemical ana-
lysis – NMR spectroscopy. He entrusted the young
Ishchenko and his classmate and friend, Olek-
sandr Turov, with studying the relevant litera-
ture, particularly on the principles of the NMR
spectrometer operation and the use of lanthanide
shift reagents to resolve overlapping signals in
1H NMR spectra – a technique of great importance
in the era before high-field superconducting spec-
trometers became widely available. The open lec-
ture on NMR spectroscopy prepared by the two
Oleksandrs attracted undergraduate and grad-
uate students, as well as faculty members who
had completed their education before the advent
of NMR spectroscopy and wished to acquaint
themselves with the capabilities of this rapidly
developing field. The lecture was received with
great interest, and the two were even invited to
present it at other venues in Kyiv.
■ Journey into Science
After graduating from the University with dis-
tinction, Oleksandr Ishchenko – on the advice of
Prof. Mykhailo Kornilov, who recognized that his
student’s “greatest” opinion talent lay in the field
of theoretical chemistry – chose Heorhii Dyadyu-
sha as his scientific advisor. The latter was an
outstanding theoretician and one of the pioneers
of quantum chemistry in Ukraine; at that time,
he worked in the Department of Color and Struc-
ture of Organic Compounds at the Institute of
Organic Chemistry of NAS of Ukraine.
The problems, assigned by Dr. Dyadyusha to
his graduate students – Oleksandr Ishchenko,
Oleksii Rykov, and Oleksii Kachkovsky – required
them to acquire new knowledge in physical and
quantum chemistry, as well as in computer pro-
gramming. The young researchers found a crea-
tive solution: they prepared scientific presenta-
tions on the topics they needed and discussed
them vigorously together.
The topic of Oleksandr Ishchenko’s first dis-
sertation research was the mathematical analy-
sis of band shapes in the absorption and fluo-
rescence spectra of organic dyes. By that time,
the scientific community already understood that
the shape of a band in an electronic spectrum
provides much more information about the elec-
tronic structure of the corresponding chromo-
phore than do the traditional parameters of
the band maximum and intensity. However,
no methodology yet existed that would allow
a meaningful comparison of the shapes of ab-
sorption and fluorescence bands of different
Prof. Oleksandr Oleksandrovych Ishchenko
ISSN 2308-8303 (Print) / 2518-1548 (Online) 38
Журнал органічної та фармацевтичної хімії 2025, 23 (3)
dyes and the formulation of reliable conclusions
based on such analysis.
The only parameter then commonly used to
describe band shapes was the full width at half
maximum (FWHM), which, as Oleksandr Ishchen-
ko demonstrated in his PhD (Candidate of Sci-
ences) thesis “The chemical structure and ab-
sorption band width of cyanine dyes” (1980), is
not sufficiently reliable for comparing bands of
markedly different shapes, especially strongly
structured ones. Instead, he proposed applying
mathematical analysis of spectral bands using
the method of moments, defining the criteria ne-
cessary for the use of this approach, such as the
required signal depth at the band edges, the sepa-
ration of higher electronic transitions (in absorp-
tion spectra), and recommendations for the appro-
ximation of band edges of different shapes [1, 2].
It should be noted that the young researcher
was fortunate to have convenient model systems
at hand, since for cyanines (cationic polymethi-
nes) the long-wavelength electronic transition is
typically well separated from the higher ones, while
the shape of these long-wavelength bands can vary
significantly depending on the structure of the
terminal heterocyclic fragments and the difference
in their electron-donating abilities. Yet this “good
fortune” was multiplied by enormous effort: an
extensive analysis of the literature and selection
of the optimal way to represent spectral bands
(a question that, even today, lacks a universal
consensus for fluorescence spectra [3]); a careful
choice of compounds from among thousands of
dyes available in the Department of Color and
Structure; hundreds of measured and digitized
spectra; writing and debugging a dedicated pro-
gram in the era of punch cards; exhausting “night
shifts” at the Glushkov Computational Center to
obtain calculation results more quickly – making
corrections to the tasks and resubmitting them
for processing while the queue was shorter; and,
finally, the analysis of the data obtained.
The result of this tremendous work was not
merely a dissertation, but a genuinely advanced
tool for the analysis of molecular spectra, as well
as a significant broadening of his scientific out-
look and deep familiarity with the literature in
his chosen field – the electronic structure, spec-
tral properties, and applications of polymethine
dyes.
At that time, one of the most active and pro-
mising areas of application for functional dyes
was laser optics. The young scientist continued
to learn intensively, deepening his knowledge in
this field and establishing broad scientific con-
tacts with laser physicists in Lithuania, Bela-
rus, Russia, and Kazakhstan. He soon realized
that the requirements for dyes in this area ex-
tended far beyond the classical structure-color
relationships. Accordingly, it became clear that
new regularities had to be uncovered – in partic-
ular, those linking the molecular structure with
the lifetime of its excited state. Here, in addition
to the analysis of spectral bands by the method
of moments, his background in theoretical and
quantum chemistry proved invaluable. A strik-
ing example of the synergy between these ap-
proaches was Oleksandr Ishchenko’s classical in-
terpretation of the differences in band shapes and
excited-state lifetimes of isomeric pyrilocyanines
and related compounds [4], which opened the way
to the rational design of dyes with record-short
lifetimes for laser applications [5, 6].
Thanks to the initiative and efforts of the
young scientist, the Department of the Color and
Structure of Organic Compounds acquired the best
spectrofluorometer available at the time (in 1984),
which enabled the launch of active studies of the
fluorescence properties of polymethines – a di-
rection he himself led. Among the first notable
results of this work was the discovery that the
fluorescence bands of strongly asymmetric cya-
nines (with respect to the electron-donating
strengths of their terminal groups), unlike their
absorption bands, resemble in their shape,
Brooker’s deviations, and vinylene shifts the fluo-
rescence bands of the corresponding symmetric
parent dyes [7], which opened the way to the de-
sign of cyanines with record-high Stokes shifts.
Moreover, the fluorescence solvatochromism of
both asymmetric and symmetric cyanines was
found to be determined almost entirely by the
solvents polarizability (nD) and to be independ-
ent of their general (εD) and specific (nucleophili-
city, electrophilicity) polarities [7, 8]. Oleksandr
Ishchenko concluded that this result implies both
an increase in the electronic symmetry of poly-
methines in the fluorescent S1 state compared
with the ground S0 state and a decrease in charge
alternation within the chromophore. This inter-
pretation was corroborated by quantum-chemi-
cal calculations. It is worth noting that the fluo-
rescent properties of polymethines, and more
broadly, fluorescence spectroscopy as a powerful
tool for studying organic compounds, became the
subject of a brilliant plenary lecture delivered
by Oleksandr Ishchenko at the All-Ukrainian
Conference in Uzhhorod in 1986, dedicated to
ISSN 2308-8303 (Print) / 2518-1548 (Online) 39
Journal of Organic and Pharmaceutical Chemistry 2025, 23 (3)
the 90th anniversary of the birth of Academician
Andrii Ivanovych Kiprianov.
In Oleksandr Ishchenko’s studies on the sol-
vatochromism of polymethines, his broad scienti-
fic outlook and excellent theoretical background –
as well as his deep understanding of solvation at
the molecular level – were clearly manifested.
These qualities formed the basis for his inter-
pretation of the atypical spectral behavior of
cyanines in weakly polar solvents [9]. In fact, he
was one of the founders of a distinct line of re-
search – the photonics of polymethine ion pairs
and their associates.
Here, the knowledge he had gained during his
student research projects proved particularly use-
ful. Using NMR spectroscopy, he was able to ex-
perimentally determine the localization of coun-
terions in cyanine ion pairs [10, 11] and, by ana-
lyzing aromatic solvent-induced shifts (ASIS), to
show that in the first solvation shell of polymethi-
nes, the molecules of aromatic solvents are ori-
ented predominantly parallel to the plane of the
polymethine chromophore [8]. This effect proved
to be so pronounced that in strongly nucleophi-
lic pyridine, the long-wavelength absorption bands
of cyanines, which undergo strong nucleophilic
solvation and hence hypsochromic shifts and
broadening, for example in DMF, appear simi-
lar to those observed in less polar solvents.
These results served as the basis for both prac-
tical recommendations on solvent selection for
the laser applications of polymethines and for
subsequent studies on dye behavior in polymer
matrices (composites), as well as for the use of
dye-doped functional materials in light-energy con-
version and quantum-electronic applications.
In this latter field, Oleksandr Oleksandrovych
became an internationally recognized expert; he
was repeatedly invited to deliver plenary lectu-
res at international conferences, to give lecture
courses at Ben-Gurion University (Israel) and Ka-
raganda State University (Kazakhstan), and to
contribute review articles on the subject [5, 12].
The defense of his doctoral thesis in 1991, titled
“The Structure and Spectral-Luminescent Proper-
ties of Polymethine Dyes”, which later formed the
basis of a monograph of the same name [13], just
officially confirmed Oleksandr Ishchenko’s sci-
entific maturity and outstanding achievements in
his chosen field of research. Another early marker
of his success as a scientist was the awarding of
the A.I. Kiprianov Prize of the NAS of Ukraine
in 1997.
This essay cannot accommodate a full account
of Oleksandr Ishchenko’s numerous subsequent
studies, reflected in more than 400 publications
in scientific journals, dozens of patents, several
book chapters, and four monographs. I will there-
fore mention only a few more of the most re-
markable directions of his work.
The first of these is the study of photoconducti-
ve polymer composites, carried out in collaboration
Department of Color and Structure of Organic Compounds, Institute of Organic Chemistry, NAS of Ukraine (2008)
ISSN 2308-8303 (Print) / 2518-1548 (Online) 40
Журнал органічної та фармацевтичної хімії 2025, 23 (3)
with Dr.Sci. Mykola Oleksandrovych Davydenko.
Among the topics of this extensive research were
the influence of external electric fields on the spec-
tral properties and electronic structure of sym-
metric and asymmetric polymethines in polymer
matrices; the effect of the structure of dye do-
pants on the photoconductivity and photovoltaic
characteristics of dyed polymer composites; and
the development of highly efficient holographic
recording media that require no protection from
scattered light, among others [14, 15].
The second one, conducted in collaboration with
several research groups – most notably with Vo-
lodymyr Ivanovych Bezrodnyi at the Institute of
Physics of the NAS of Ukraine – was a develop-
ment of Oleksandr Ishchenko’s ideas on laser ma-
terials based on organic dyes [16 – 18]. The first
successful demonstration worldwide of passive
mode-locking of Erbium-doped laser at 1340 nm
represented a particularly notable achievement
in this area [19].
The third – one in which I was fortunate to par-
ticipate – involved fundamental studies on the
solvatochromism, electronic structure, and pho-
tophysical properties of merocyanines [20, 21].
The success of this pursuit owed much to Olek-
sandr Oleksandrovych’s deep understanding of the
electronic structure of conjugated systems, extensive
use of the method of moments for spectral data ana-
lysis (using the program he had developed), and the
broad collaboration with physicist-spectroscopists
that he established. This collaboration made it
possible, in particular, to obtain essential spec-
tral data at cryogenic temperatures [22, 23], to
record for the first time the absorption spectra of
merocyanines in the gas phase [24], and to trace
how the molecular structure of merocyanines
affects their (photo)isomerization behavior and
excited-state lifetimes [25, 26].
■ Imparting Knowledge
Yet throughout his long and fruitful scientific
career, Oleksandr Oleksandrovych’s defining pas-
sion was his tireless desire to share knowledge –
to ignite curiosity and a love of science in people’s
hearts, regardless of their age. Even as a univer-
sity student, he organized and conducted classes
and lectures for schoolchildren and helped pre-
pare prospective university applicants. And he
never abandoned this mission after graduation.
Since the early 1990s, already a young Doc-
tor of Sciences, he developed and taught a lectu-
re course on electronic spectroscopy at his alma
mater, the Faculty of Chemistry of Taras Shev-
chenko National University of Kyiv. Remarkably,
he initially did so voluntarily and was formally
appointed to a professorship only in 1998. His lec-
tures – clear and accessible, yet truly fundamen-
tal and richly illustrated with examples both
from his own research and from the most up-to-
date scientific achievements – attracted not only
O. O. Ishchenko (left) and M. O. Davydenko (right) showcase their laser defectoscopy device at the exhibition
ISSN 2308-8303 (Print) / 2518-1548 (Online) 41
Journal of Organic and Pharmaceutical Chemistry 2025, 23 (3)
students but also graduate students and even
faculty members.
This popularity stemmed not only from his na-
tural teaching talent and ability to connect with
an audience but also from his meticulous pre-
paration of both content and visual materials.
Both components were continuously refined, im-
proved, and expanded from year to year. Later,
to the course on electronic spectroscopy, he added
an independently designed special course on ma-
terials science and on physical methods for the
investigation of chemical compounds. In addition
to the Faculty of Chemistry, Oleksandr Ishchen-
ko also taught several courses at the Education-
al and Research Institute of High Technologies
of the same university from its founding in 2009.
■ Concluding Remarks
To encompass an entire human life within the
bounds of a memorial article is a task that goes
far beyond what is possible. A globe may serve as
an adequate model of the Earth, yet it still con-
ceals more than it reveals. Our imagination and
experience remind us that behind every genuine
success, every achievement that remains in peo-
ple’s memory, lie immense effort – above all, the
labor of self-discipline and self-development –
as well as a deep love: love for one’s chosen path,
for knowledge, for people, and the courage to
make difficult choices in difficult times.
The scientific career of Professor Oleksandr
Ishchenko was far from an “easy walk.” Within
the Department of Color and Structure of Orga-
nic Compounds, he advanced from engineer to
the head of the Department – a position he held
from 2006 until his sudden passing on July 31,
2024. In 2015, he was elected a Corresponding
Member, and in 2021, a Full Member of the Na-
tional Academy of Sciences of Ukraine. Yet these
marks of recognition and professional success also
meant that he had less time for what he loved
most – the search for new knowledge and the joy
of sharing it.
He had many ideas and plans for future studies
and projects. He lived, worked, and thought cre-
atively to the very end.
■ Acknowledgments
I express my deep gratitude to Professor Va-
lentyna Ishchenko, the wife of Oleksandr Olek-
sandrovych, for her invaluable assistance in
preparing this article.
■ References
1. Ishchenko, A. A.; Derevyanko, N. A.; Kudinova, M. A.; Dyadyusha, G. G.; Tolmachev, A. I. Chemical Structure and Shape of the Absorption
Bands of Pyrylocyanine Dyes. Theoretical and Experimental Chemistry 1978, 13 (6), 628 – 630. https://doi.org/10.1007/BF00520821.
2. Dyadyusha, G. G.; Ishchenko, A. A. Application of the Method of Moments to the Study of the Electronic Spectra of Organic Dyes.
Journal of Applied Spectroscopy 1979, 30 (6), 746 – 750. https://doi.org/10.1007/BF00615763.
3. Catalán, J. On the Mirror Symmetry between the Absorption and Emission of Complex Molecules in Solution. Journal of Physical Or-
ganic Chemistry 2020, 33 (3), e4034. https://doi.org/10.1002/poc.4034.
4. Dyadyusha, G. G.; Ishchenko, A. A.; Derevyanko, N. A.; Tolmachev, A. I. Absorption Bandwidth of Isomeric Polymethine Dyes. Journal
of Applied Spectroscopy 1984, 41 (6), 1400 – 1404. https://doi.org/10.1007/BF00659321.
5. Ishchenko, A. A. Laser Media Based on Polymethine Dyes. Quantum Electronics 1994, 24 (6), 471 – 492.
https://doi.org/10.1070/qe1994v024n06abeh000122.
6. Ishchenko, A. A. Physicochemical Aspects of the Creation of Modern Light-Sensitive Materials Based on Polymethine Dyes. Theoretical
and Experimental Chemistry 1998, 34 (4), 191 – 210. https://doi.org/10.1007/BF02523249.
7. Ishchenko, A. A.; Derevyanko, N. A.; Svidro, V. A. Constitution and Fluorescence Spectra of Unsymmetrical Polymethine Dyes. Dyes and
Pigments 1992, 19 (3), 169 – 177. https://doi.org/10.1016/0143-7208(92)80023-G.
8. Ishchenko, A. A.; Svidro, V. A.; Derevyanko, N. A. Solvatofluorochromy of Cationic Cyanine Dyes. Dyes and Pigments 1989, 10 (2), 85 – 96.
https://doi.org/10.1016/0143-7208(89)85001-6.
9. Dyadyusha, G. G.; Ishchenko, A. A.; Derevyanko, N. A.; Tolmachev, A. I. Study of Ionic Equilibria of Indotricarbocyanines in Aromatic
Hydrocarbons. Doklady Physical Chemistry 1982, 264 (2), 351 – 355.
10. Komarov, I. V.; Turov, A. V.; Kornilov, M. Yu.; Derevyanko, N. A.; Ishchenko, A. A. Study of the Chemical Structure of Ion Pairs of Cationic
Cyanine Dyes in Weakly Polar Solvents by the Method of PMR Spectroscopy with the Use of Lanthanide Shift Reagents. Journal of
General Chemistry of the USSR 1989, 59 (10), 2110 – 2115.
11. Komarov, I. V.; Turov, A. V.; Ishchenko, A. A.; Derevyanko, N. A.; Kornilov, M. Yu. Study of the Structure of Ion Pairs of Cationic Cyanine
Dyes Using Lanthanide Chelates and NMR Quadrupole Nuclei. Doklady. Chemistry 1989, 306 (5), 178 – 181.
12. Ishchenko, A. A. Photonics and Molecular Design of Dye-Doped Polymers for Modern Light-Sensitive Materials. Pure and Applied
Chemistry 2008, 80 (7), 1525 – 1538. https://doi.org/10.1351/pac200880071525.
13. Ishchenko, A. A. Structure and Spectral-Luminescent Properties of Polymethine Dyes [in Russian]; Naukova Dumka: Kyiv, 1994.
14. Davidenko, N. A.; Ishchenko, A. A.; Kuvshinsky, N. G. Photonics of Molecular Semiconductor Composites Based on Organic Dyes [in
Russian]; Naukova Dumka: Kyiv, 2005.
15. Bulavko, G. V.; Ishchenko, A. A. Organic Photovoltaic Structures [in Ukrainian]; Naukova Dumka: Kyiv, 2023.
https://doi.org/10.15407/978-966-00-1839-6.
ISSN 2308-8303 (Print) / 2518-1548 (Online) 42
Журнал органічної та фармацевтичної хімії 2025, 23 (3)
16. Bezrodnyĭ, V. I.; Ishchenko, A. A.; Karabanova, L. V; Slominskiĭ, Y. L. Highly Stable Polymethine-Dye-Based Polymer Switches for Passive
Mode Locking in Neodymium Lasers. Quantum Electronics 1995, 25 (8), 819 – 822. https://doi.org/10.1070/QE1995v025n08ABEH000477.
17. Bezrodnyi, V. I.; Ishchenko, A. A. High Efficiency Lasing of a Dye-Doped Polymer Laser with 1.06 Μm Pumping. Applied Physics B: Lasers
and Optics 2001, 73 (3), 283 – 285. https://doi.org/10.1007/s003400100646.
18. Bezrodna, T.; Bezrodnyi, V.; Ishchenko, A.; Slominskii, Y.; Sharanov, I. New Polymethine Dyes for Liquid and Polymer Passive Q-Switches
of Neodymium Lasers. Optik 2022, 267, 169725. https://doi.org/10.1016/j.ijleo.2022.169725.
19. Bezrodnyĭ, V. I.; Derevyanko, N. A.; Ishchenko, A. A.; Slominskiĭ, Y. L. Polymer Passive Laser Switches for Stimulated Emission in the
Region of 1.3 Μm. Quantum Electronics 1995, 25 (8), 823 – 825. https://doi.org/10.1070/QE1995v025n08ABEH000478.
20. Kulinich, A. V.; Ishchenko, A. A. Electronic Structure and Spectral and Fluorescence Properties of Merocyanines [in Ukrainian]; Naukova
Dumka: Kyiv, 2022.
21. Kulinich, A. V.; Ishchenko, A. A. Merocyanines: Electronic Structure and Spectroscopy in Solutions, Solid State, and Gas Phase. Chemical
Reviews 2024, 124 (21), 12086 – 12144. https://doi.org/10.1021/acs.chemrev.4c00317.
22. Kulinich, A. V.; Ishchenko, A. A.; Bondarev, S. L.; Knyukshto, V. N. Low-Temperature Effect on the Electronic Structure and Spec-
tral-Fluorescent Properties of Highly Dipolar Merocyanines. Journal of Physical Chemistry A 2018, 122 (50), 9645 – 9652.
https://doi.org/10.1021/acs.jpca.8b09522.
23. Kulinich, A. V.; Ishchenko, A. A.; Bondarev, S. L.; Knyukshto, V. N. Effect of Donor and Acceptor End-Groups on Electronic Structure and
Spectral-Fluorescent Properties of Merocyanines in Frozen Ethanol. Journal of Photochemistry and Photobiology A: Chemistry 2021,
405, 112932. https://doi.org/10.1016/j.jphotochem.2020.112932.
24. Ishchenko, A. A.; Kulinich, A. V.; Bondarev, S. L.; Raichenok, T. F. UV–Vis Absorption Spectra and Electronic Structure of Mero-
cyanines in the Gas Phase. Spectrochimica Acta – Part A: Molecular and Biomolecular Spectroscopy 2018, 190, 332 – 335.
https://doi.org/10.1016/j.saa.2017.09.054.
25. Kulinich, A. V.; Ishchenko, A. A.; Chibisov, A. K.; Zakharova, G. V. Effect of Electronic Asymmetry and the Polymethine Chain
Length on Photoprocesses in Merocyanine Dyes. Journal of Photochemistry and Photobiology A: Chemistry 2014, 274, 91 – 97.
https://doi.org/10.1016/j.jphotochem.2013.09.016.
26. Voiciuk, V.; Redeckas, K.; Derevyanko, N. A.; Kulinich, A. V.; Barkauskas, M.; Vengris, M.; Sirutkaitis, V.; Ishchenko, A. A. Study of Pho-
tophysical Properties of a Series of Polymethine Dyes by Femtosecond Laser Photolysis. Dyes and Pigments 2014, 109, 120 – 126.
https://doi.org/10.1016/j.dyepig.2014.05.012.
Information about the author:
Andrii V. Kulinich, Dr.Sci in Chemistry, Leading Researcher of the Colour and Structure of Organic Compounds Department,
Institute of Organic Chemistry of the National Academy of Sciences of Ukraine; https://orcid.org/0000-0002-0857-6632;
e-mail for correspondence: andrii.kulinich@gmail.com.
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| id | oai:ojs.journals.uran.ua:article-343780 |
| institution | Journal of Organic and Pharmaceutical Chemistry |
| issn | 2518-1548 |
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| language | English |
| last_indexed | 2026-08-23T01:00:35Z |
| publishDate | 2025 |
| publisher | National University of Pharmacy |
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| spelling | oai:ojs.journals.uran.ua:article-3437802026-08-22T19:32:42Z Oleksandr Ishchenko: And Gladly Would He Learn, and Gladly Teach Олександр Іщенко: Натхненно пізнавав – натхненно навчав Kulinich, Andrii V. поліметинові барвники теорія кольору електронна будова матеріалознавство історія хімії polymethine dyes color theory electronic structure material science history of chemistry The Ukrainian school of organic dye chemistry has long received worldwide recognition. Among the scientists whose achievements embody this success is Academician Oleksandr Oleksandrovych Ishchenko. Over more than half a century of fruitful research at the Department of Color and Structure of Organic Compounds of the Institute of Organic Chemistry of the National Academy of Sciences of Ukraine, he laid the foundations for the rational design of functional dyes for light-energy conversion, particularly for various laser technologies; became one of the pioneers of polymethine ion-pair photonics; developed methodological approaches to the study of electronic absorption and fluorescence spectra using the method of moments, which provided new insights into the electronic structure of organic chromophores; and made a significant contribution to the systematic study and interpretation of the solvatochromism of polymethines of different types. The driving force behind all these achievements was his enduring passion for science — a deep desire to learn and share knowledge with future generations of researchers.   Українська школа органічних барвників давно здобула світове визнання. Серед учених, чиї досягнення уособлюють цей успіх, — академік НАН України Олександр Олександрович Іщенко. За понад півстоліття плідної наукової праці у відділі кольору та будови органічних сполук Інституту органічної хімії НАН України він заклав основи цілеспрямованого дизайну функціональних барвників для перетворювачів світлової енергії, насамперед для різноманітних лазерних технологій; став одним із піонерів фотоніки іонних пар поліметинів; розробив методологічні підходи до дослідження електронних спектрів поглинання та флуоресценції із застосуванням методу моментів, що дозволило отримати нову інформацію про електронну будову органічних хромофорів; зробив вагомий внесок у раціональне дослідження й інтерпретацію сольватохромії поліметинів різної природи. Ключовим рушієм цього успіху було його незмінне натхнення наукою, прагнення пізнавати нове й передавати знання майбутнім поколінням науковців.   National University of Pharmacy 2025-09-24 Article Article application/pdf https://ophcj.nuph.edu.ua/article/view/343780 10.24959/ophcj.25.343780 Journal of Organic and Pharmaceutical Chemistry; Vol. 23 No. 3 (2025); 36-42 Журнал органической и фармацевтической химии; Том 23 № 3 (2025); 36-42 Журнал органічної та фармацевтичної хімії; Том 23 № 3 (2025); 36-42 2518-1548 2308-8303 en https://ophcj.nuph.edu.ua/article/view/343780/333805 Copyright (c) 2025 Andrii V. Kulinich http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | поліметинові барвники теорія кольору електронна будова матеріалознавство історія хімії Kulinich, Andrii V. Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title | Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title_alt | Oleksandr Ishchenko: And Gladly Would He Learn, and Gladly Teach |
| title_full | Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title_fullStr | Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title_full_unstemmed | Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title_short | Олександр Іщенко: Натхненно пізнавав – натхненно навчав |
| title_sort | олександр іщенко: натхненно пізнавав – натхненно навчав |
| topic | поліметинові барвники теорія кольору електронна будова матеріалознавство історія хімії |
| topic_facet | поліметинові барвники теорія кольору електронна будова матеріалознавство історія хімії polymethine dyes color theory electronic structure material science history of chemistry |
| url | https://ophcj.nuph.edu.ua/article/view/343780 |
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