Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2
Hierarchical titanosilicate zeolites of the MFI structural type (zeolites with the MFI framework topology according to the classification of the International Zeolite Association) showed a high catalytic activity in the synthesis of cyclic carbonate from styrene in the presence of tert-butyl hydrope...
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| author | Kyryliuk, Dmytro V. Shvets, Oleksiy V. |
| author_facet | Kyryliuk, Dmytro V. Shvets, Oleksiy V. |
| author_institution_txt_mv | [
{
"author": "Dmytro V. Kyryliuk",
"institution": "L. V. Pisarzhevskii Institute of Physical Chemistry of the NAS of Ukraine; Enamine Ltd."
},
{
"author": "Oleksiy V. Shvets",
"institution": "L. V. Pisarzhevskii Institute of Physical Chemistry of the NAS of Ukraine"
}
] |
| author_sort | Kyryliuk, Dmytro V. |
| baseUrl_str | https://ophcj.nuph.edu.ua/oai |
| collection | OJS |
| datestamp_date | 2026-06-10T08:24:31Z |
| description | Hierarchical titanosilicate zeolites of the MFI structural type (zeolites with the MFI framework topology according to the classification of the International Zeolite Association) showed a high catalytic activity in the synthesis of cyclic carbonate from styrene in the presence of tert-butyl hydroperoxide as an oxidant. It has been shown that the combination of the redox properties of titanium centers with the acid-base characteristics of the zeolite matrix ensures the efficient implementation of the tandem process within a single reaction medium. The results obtained confirm the potential of titanium-containing zeolites as an effective platform for creating heterogeneous catalysts for the direct conversion of olefins into cyclic carbonates. |
| doi_str_mv | 10.24959/ophcj.26.360726 |
| first_indexed | 2026-06-11T01:00:23Z |
| format | Article |
| fulltext |
ISSN 2308-8303 (Print) / 2518-1548 (Online) 14
Original Research
http://ophcj.nuph.edu.ua
UDC 544.2
D. V. Kyryliuk1,2, O. V. Shvets1
1 L. V. Pisarzhevskii Institute of Physical Chemistry of the NAS of Ukraine, 31 Nauky av., 03028 Kyiv, Ukraine
2 Enamine Ltd., 78 Winston Churchill Street, 02094 Kyiv, Ukraine
Catalytic Properties of Hierarchical Ti-MFI Zeolites
in the Synthesis of Cyclic Carbonates from Styrene
Under CO2 Pressure
Abstract
Hierarchical titanosilicate zeolites of the MFI structural type (zeolites with the MFI framework topology according to the
classification of the International Zeolite Association) showed a high catalytic activity in the synthesis of cyclic carbonate
from styrene in the presence of tert-butyl hydroperoxide as an oxidant. It has been shown that the combination of the redox
properties of titanium centers with the acid-base characteristics of the zeolite matrix ensures the efficient implementation of
the tandem process within a single reaction medium. The results obtained confirm the potential of titanium-containing zeo-
lites as an effective platform for creating heterogeneous catalysts for the direct conversion of olefins into cyclic carbonates.
Keywords: styrene; cyclic carbonate; styrene oxide; hierarchical zeolites; titanosilicates
Д. В. Кирилюк1,2, О. В. Швець1
1 Інститут фізичної хімії ім. Л. В. Писаржевського Національної академії наук України,
пр. Науки, 31, м. Київ, 03028, Україна
2 ТОВ НВП «Єнамін», вул. Вінстона Черчилля, 78, м. Київ, 02094, Україна
Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів
зі стиролу під тиском СО2
Анотація
Ієрархічні титаносилікатні цеоліти структурного типу MFI (цеоліти з топологією MFI згідно з класифікацією Міжнародної
цеолітної асоціації) показали високу каталітичну активність у реакціях одержання циклічного карбонату зі стиролу
в присутності трет-бутилгідропероксиду як окисника. Доведено, що поєднання окисно-відновних властивостей ти-
танових центрів із кислотно-основними характеристиками цеолітної матриці забезпечує ефективну реалізацію тан-
демного процесу в одному реакційному середовищі. Отримані результати підтверджують перспективність титановміс-
них цеолітів як ефективної платформи для створення гетерогенних каталізаторів прямого перетворення олефінів на
циклічні карбонати.
Ключові слова: стирол; циклічний карбонат; епоксид стиролу; ієрархічні цеоліти; титаносилікати
Citation: Kyryliuk, D. V.; Shvets, O. V. Catalytic Properties of Hierarchical Ti-MFI Zeolites in the Synthesis of Cyclic Carbonates from
Styrene Under CO2 Pressure. Journal of Organic and Pharmaceutical Chemistry 2026, 24 (2), 14 – 20.
https://doi.org/10.24959/ophcj.26.360726
Received: 12 March 2026; Revised: 25 April 2026; Accepted: 2 May 2026
Copyright© 2026, D. V. Kyryliuk, O. V. Shvets. 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 authors have no conflict of interests to declare.
ISSN 2308-8303 (Print) / 2518-1548 (Online) 15
Journal of Organic and Pharmaceutical Chemistry 2026, 24 (2)
■ Introduction
Carbon dioxide (CO2) is one of the main green-
house gases produced by human activity, and is
a factor in global warming and climate change [1].
The atmospheric concentration of carbon dioxide
has been steadily increasing over the past two cen-
turies [1]. Carbon dioxide is also an abundant
carbon resource that can be utilized in the che-
mical industry. It is an inexpensive, non-flam-
mable, and non-toxic carbon source. Therefore,
the synthesis of chemical compounds using CO2
has attracted significant scientific interest [2 – 4].
However, the chemical inertness and high acti-
vation energy of reactions involving CO2 limit the
range of possible applications [3]. The use of ma-
terials capable of catalyzing reactions involving
CO2 can reduce the activation energy and enable
its efficient utilization. Therefore, the develop-
ment of effective catalytic systems that enhance
the interaction of CO2 with organic molecules is
of great importance.
Cyclic carbonates are compounds that can be
synthesized from carbon dioxide and readily avail-
able organic substrates. They are components of
biodegradable polymers [5, 6], precursors for poly-
urethanes [7], electrolytes in lithium-ion batteries
[8], solvents [9, 10], and valuable intermediates
in the synthesis of functional compounds [11].
Cyclic carbonates can be obtained from epox-
ides [3, 12, 13], olefins in the presence of an oxi-
dant [14 – 16], and diols [17, 18].
The production of cyclic carbonates directly
from olefins in the presence of an oxidant and
CO2 is one of the key directions for the CO2 che-
mical utilization. In contrast to the traditional
approach involving the separate synthesis of epo-
xides, this method combines the epoxidation and
CO2 cycloaddition in a single reaction medium,
reducing the number of steps and material loss-
es [15, 16]. The process proceeds via a tandem
mechanism, in which the epoxide is formed in situ
and subsequently converted into a five-membered
cyclic carbonate.
The oxidative carboxylation is a complex ca-
talytic process as it involves two stages with dis-
tinct requirements: the epoxidation requires an
oxidant and a metal center for the C=C bond ac-
tivation, whereas the cycloaddition step involves
the nucleophilic or Lewis acidic activation of the
epoxide and CO2 [16]. Therefore, effective sys-
tems are typically multicomponent, comprising
metal-based catalysts and cocatalysts (e.g., halide
salts and ionic liquids).
The combination of multiple catalysts in a sin-
gle reactor, in particular epoxidation catalysts
and catalysts for the cycloaddition of CO2 to the
resulting epoxide, is a promising approach. At the
same time, it is of interest to investigate the use
of various titanosilicate zeolites in the synthesis
of cyclic carbonates from olefins and to compare
the performance of hierarchical and non-hierar-
chical zeolite systems in this two-step process.
The aim of this study was to determine the
effect of the reaction mixture composition, par-
ticularly the titanium content, on the adsorption,
acidic, and catalytic properties of hierarchical zeo-
lites in the oxidation of styrene with tert-butyl
hydroperoxide under CO2 pressure and in its ab-
sence.
■ Materials and methods
MFI-type zeolites were synthesized according
to the procedure described in [19, 20], using the
structure-directing agent С16-6-6(ОН)2, proposed
by Ryoo et al. in 2009 [21]. The numbers in the
sample names correspond to the Si/Ti ratio in the
reaction mixture used for the synthesis, while
‘am’ denotes the partially amorphous sample.
A detailed description of the synthesis of the
structure-directing agent is provided in [21].
The synthesis of this template was carried out
in two stages. At the first stage, 1 mol of hexa-
decyl bromide was added dropwise to 3 mol of
N,N,N′,N′-tetramethylhexane-1,6-diamine. The re-
action was performed in the acetonitrile/1,4-di-
oxane (1:1) solution. The reaction mixture was
maintained at 80 °C for 72 h, after which the so-
lution was concentrated using a rotary vacuum
evaporator. The resulting gel-like mixture was
washed with methyl tert-butyl ether and dried
on a rotary evaporator. The yield of С16-6 varied
from 50 to 75 %. At the second stage, 0.5 mol of
С16-6 and 0.5 mol of hexyl bromide were mixed,
heated in acetonitrile (150 mL), and maintained
at 80 °C for 16 – 18 h. The solution was evapo-
rated, and the resulting precipitate was washed
with methyl tert-butyl ether. The synthesis of
hierarchical zeolites was carried out according to
the following procedure [20]: tetraethyl orthosil-
icate (TEOS) was added to an aqueous solution
containing the structure-directing agent (SDA,
Figure 1), and the mixture was stirred for 20 min.
The reaction mixture was cooled to 6 – 8 °C, and
the calculated amount of titanium butoxide was
added. The mixture was then stirred at 60 °C for
3 h in an open vessel until the complete removal
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Журнал органічної та фармацевтичної хімії 2026, 24 (2)
of ethanol formed during the TEOS hydrolysis.
The amount of water evaporated within 3 hours
was added to the reaction gel. The composition
of the reaction mixtures (RM) was as follows –
24SiO2: (0,24 – 0,48) TiO2: 1,8 – 2,3 SDA: 1706 H2O.
The reaction mixtures (RM) were subjected to the
hydrothermal treatment at 150 °C for 16 – 18 days
in a stirred oven. After the hydrothermal treat-
ment, the zeolite synthesized powder was fil-
tered, washed with distilled water and ethanol,
and dried at 100 °C for 1 h. The removal of the
SDA was carried out by heating the zeolite sam-
ples to 550 °C at a rate of 5 °C min–1, followed by
keeping at this temperature for 5 h.
The results of the elemental analysis of the
zeolites obtained are presented in Table 1.
The crystalline structure and the presence of
impurity zeolite phases were determined by the
X-ray diffraction using a Bruker D8 Advance
diffractometer (Germany) with the Cu Kα radia-
tion. The diffraction patterns were recorded in
the 2θ range of 3 – 45° with a step size of 0.05°.
The signal acquisition time was 3 s per step.
The adsorption properties of the materials were
studied using low-temperature nitrogen adsorp-
tion-desorption at −196 °C. Based on the analy-
sis of nitrogen adsorption isotherms, the follow-
ing parameters were determined: the specific
surface area (SBET, calculated by the Brunauer–
Emmett–Teller method), the mesopore surface
area (SMESO), the micropore volume (Vmicro, the
t-plot method [22]), the mesopore volume (Vmeso),
and the mesopore diameter (dmeso, the Barrett–
Joyner–Halenda method [23]).
The Si/Ti ratio was determined by the X-ray
fluorescence (XRF) spectroscopy using an ElvaX
Plus instrument and the Elva4 software.
The morphology of the sample was examined
using a Mira 3 Tescan scanning electron microscope.
Prior to measurements, the samples were coat-
ed with a 40 nm thick platinum-gold alloy layer.
The diffuse reflectance UV–Vis spectra were
recorded using a Specord M40 spectrophotome-
ter in the 200 – 700 nm range. The reflectance
spectra were converted to absorption using the
Kubelka–Munk theory [24].
The acidic properties of hierarchical zeolites
were evaluated by the stepwise pyridine (Py)
ad/desorption. Tablets (up to 0.01 g, surface area
0.0064 m²) were placed in a spectral cell and eva-
cuated at 450 °C for 1 h. The activated samples
were heated to 150 °C and exposed to pyridine
for 30 min, followed by the evacuation to remove
physically adsorbed pyridine. IR spectra were
recorded on a PerkinElmer Spectrum One spec-
trometer. The concentrations of acid sites were
determined using extinction coefficients report-
ed in [25].
Zeolite catalysts were evaluated in the TBHP-
mediated oxidation of styrene under the excess
CO2 pressure using RVD-2-250 autoclaves (Riva
Stal, Ukraine) equipped with Teflon liners. Prior
to the reaction, the catalysts were activated at
150 °C for 16 h and introduced into the reaction
mixture while hot. The autoclave was charged
with 5 mL of CH3CN, 0.1 mL of 1,3,5-trimethyl-
benzene (internal standard), 50 mg of the cata-
lyst, 0.07 g of tetrabutylammonium iodide (TBAI,
a cocatalyst for the second stage), 0.43 mL of sty-
rene, and 0.67 mL of a 70 % aqueous tert-butyl
hydroperoxide (TBHP) solution. CO2 was intro-
duced to an initial pressure of 20 atm. The reac-
tion mixture was heated to 100 °C for 1 h and
then stirred at this temperature for 22 h, after
which the autoclave was cooled and depressuri-
zed to atmospheric pressure. A 1 mL aliquot was
withdrawn from the reaction mixture, and the
catalyst was separated by the centrifugation.
A 0.2 mL portion of the supernatant was diluted
to 1 mL with methanol and analyzed by the gas
N
C6H13
N
C16H33
Figure 1. The SDA used for the synthesis of hierarchical MFI
zeolites
Table 1. The elemental composition and adsorption properties of the hierarchical zeolites studied in this work
Sample
Si/Ti ratio in
SBEТ, m2 g–1 Smeso, m2 g–1 V∑, cm3 g–1 Vmeso, cm3 g–1 Vmicro, cm3 g–1
RM1 Samp2
TS-1 50 55 420 5 0.19 0.01 0.18
Ti-MFI_100 100 95 410 250 0.48 0.42 0.06
Ti-MFI_75 75 70 500 115 0.71 0.54 0.17
Ti-MFI_50 50 45 440 40 0.47 0.39 0.18
Ti-MFI_50_am 50 40 105 50 0.12 0.10 0.02
Note: 1The Si/Ti ratio in the reaction mixture; 2The Si/Ti ratio in the sample obtained was determined by the X-ray fluorescence spectroscopy
ISSN 2308-8303 (Print) / 2518-1548 (Online) 17
Journal of Organic and Pharmaceutical Chemistry 2026, 24 (2)
chromatography–mass spectrometry (GC–MS;
GC7820A, Agilent Technologies).
■ Results and discussion
Figure 2A shows the X-ray diffraction pat-
terns of the zeolite samples obtained in this study.
All samples exhibit reflections at 2θ = 7,8; 8,7°;
23,1°; 23,8°; 29,9°, characteristic of the MFI struc-
ture. Some reflections corresponding to the [0k0]
planes are absent in the Ti-MFI_100–Ti-MFI_50
series, which may indicate the formation of thin na-
nosheet-like particles, similar to those previously
reported [19 – 21]. The Ti-MFI_50_am sample ex-
hibited a significantly lower degree of the crystal-
linity compared to the other samples. For the Ti-
MFI_100–Ti-MFI_50 series, an increase in the
titanium content led to an increase in the crys-
tallinity; in particular, for Ti-MFI_50, a reflection
at 2θ = 24.2° and several less intense reflections
characteristic of the microporous TS-1 analog were
observed. No impurity crystalline phases of other
zeolites or bulk silicate phases were detected in
the diffraction patterns of the samples studied.
Crystalline phases corresponding to titanium
oxide were also not observed.
A B
C D
10 20 30 40
2 , degreeθ
0.05 cm /(g*nm)
3
10 20 30 40
d, nm
1
2
3
4
5
0.0 0.2 0.4 0.6
p/p°
0.8 1.0
0
50
100
150
200
250
300
350
400
450
V
c
m
g
a
b
s
,
*
3
–
1
1
2
3
4
5
Figure 2. (A) X-ray diffraction patterns of Ti-MFI zeolites, (B) adsorption isotherms, (C) mesopore size distribution curves,
and the (D) SEM image of a hierarchical MFI-type zeolite (1 – TS-1, 2 – Ti-MFI_100, 3 – Ti-MFI_75, 4 – Ti-MFI_50, 5 – Ti-MFI_50_am)
ISSN 2308-8303 (Print) / 2518-1548 (Online) 18
Журнал органічної та фармацевтичної хімії 2026, 24 (2)
Figure 2B shows the nitrogen adsorption
isotherms, and Table 1 summarizes the corre-
sponding adsorption characteristics of MFI-type
zeolites. Figure 2C presents the mesopore size
distribution curves. As shown, the samples are
characterized by the presence of mesopores with
diameters in the range of 2 – 10 nm, with rela-
tively narrow size distributions.
Figure 2D shows a typical SEM image of a
hierarchical MFI-type zeolite. As observed, the
zeolites consist of sponge-like particles a few mic-
rometers in size, composed of multilamellar layers.
The typical number of layers is about 10 – 20.
Figure 3А shows the diffuse reflectance
UV–Vis spectra of the series of samples studied.
According to the literature, this method allows
the coordination state of heteroatoms (Ti, Sn, Zr,
etc.) in the zeolite framework to be evaluated [26].
The deconvolution of the spectra obtained reveals
several absorption bands, including maxima at
220 and 251 nm. According to the literature, the
band at 220 nm is attributed to the charge trans-
fer from O2– to tetrahedrally coordinated Ti4+ ca-
tions [20], whereas the band at 251 nm corre-
sponds to the extra-framework isolated and non-
isolated Ti4+ species in the octahedral coordina-
tion.
For all samples except Ti-MFI_50_am, no
band at ~255 nm is observed, indicating that ti-
tanium is present predominantly in the tetrahe-
dral coordination. In the case of Ti-MFI_50_am,
the significant amount of the extra-framework
titanium may be attributed to the low crystal-
linity of the sample and, consequently, the high
content of the amorphous phase.
Figure 3B shows the Fourier-transform IR
spectra of the adsorbed pyridine for Ti-MFI zeo-
lites; the concentrations of different types of acid
sites were calculated according to the method de-
scribed in [25]. The spectra of the adsorbed pyri-
dine for all samples exhibit bands at 1446 cm–1,
which can be attributed to C–N stretching vibra-
tions of the pyridine coordinated to Lewis acid
sites of various types. According to the literature,
the band at 1446 cm–1 can be attributed both to
the Lewis acid sites formed by Ti4+ cations incor-
porated into the zeolite framework [27] and to
the pyridine adsorbed on weakly acidic hydroxyl
groups that are inactive in the process studied.
As shown in Table 2, the maximum concentra-
tion of Lewis acid sites associated with titanium
was observed for Ti-MFI-75. Further increases
in the titanium content in the reaction mixture
and in the samples do not result in a significant
increase in their concentration. The Ti-MFI_50_am
sample is characterized by a relatively low con-
centration of Lewis acid sites, which is attrib-
uted to the high content of extra-framework ti-
tanium species.
As shown in Table 1, Ti-MFI_100 possesses
a lower specific surface area and a lower concen-
tration of Lewis acid sites, which may reduce the
A B
200 300 400 500
Wavelenght, nm
2
3
4
5
1
2
3
4
5
1
600 700 800
220
258
0. a.u.5
1700 1650 1600 1550
ν, cm
–1
1500 1450 1400
1606
1598
1490 1446
Figure 3. (A) Diffuse reflectance UV–Vis spectra; (B) IR spectra of the adsorbed pyridine for Ti-MFI zeolites. (1 – TS-1, 2 – Ti-MFI_100,
3 – Ti-MFI_75, 4 – Ti-MFI_50, 5 – Ti-MFI_50_am)
ISSN 2308-8303 (Print) / 2518-1548 (Online) 19
Journal of Organic and Pharmaceutical Chemistry 2026, 24 (2)
accessibility and the number of catalytically ac-
tive titanium centers. Hierarchical zeolites out-
perform conventional TS-1 in the catalytic per-
formance, which may be attributed to their larg-
er surface area. The low catalytic activity of the
Ti-MFI_50_am sample can also be associated with
the reduced surface area of the material and the
lower concentration of Lewis acid sites.
■ Conclusions
Hierarchical Ti‑MFI zeolites have been shown
to be effective catalysts for the one-pot synthe-
sis of cyclic carbonates from styrene under CO2
pressure. Their catalytic performance is governed
by the balance between framework tetrahedral
Ti4+ species and accessible Lewis acid sites, as
well as the presence of the hierarchical porosity.
The Ti-MFI_75 sample has exhibited optimal pro-
perties, providing the highest conversion and
near-quantitative selectivity to cyclic carbonate.
The results demonstrate that combining redox
and acid functionalities within a single zeolite
enables the efficient tandem catalysis and re-
presents a promising strategy for the sustainable
CO2 utilization.
■ Acknowledgments
The authors express their gratitude to My-
khailo M. Kurmach for conducting the X-ray dif-
fraction analysis and studying the acid proper-
ties, and to Pavlo S. Yaremov for measuring the
adsorption isotherms of the materials studied.
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Table 2. Acidic properties of hierarchical BEA-type zeolites and their catalytic activity in the conversion of styrene to cyclic carbonate
Samples
Center concentration, μmole g–1 Styrene
conversion, %
Cyclic carbonate
selectivity, %
Cyclic carbonate
yields, %Ti4+ Lewis OH groups
TS-1 91 22 85.7 97.4 83.2
Ti-MFI_100 66 180 72.1 100 72.1
Ti-MFI_75 143 25 90.7 100 90.7
Ti-MFI_50 61 20 98 67.5 66.1
Ti-MFI_50_am 35 139 100 10.4 10.4
ISSN 2308-8303 (Print) / 2518-1548 (Online) 20
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Information about the authors:
Dmytro V. Kyryliuk (corresponding author), Ph.D. Student of the Department of Porous Materials, L.V. Pisarzhevskii Institute of Physical
Chemistry of the National Academy of Sciences of Ukraine; Senior Chemist at Enamine Ltd; https://orcid.org/0009-0007-9199-6948;
e-mail for correspondence: dimakirilyk@gmail.com.
Oleksiy V. Shvets, Ph.D. in Chemistry, Senior Research Scientist of the Department of Porous Materials, L.V. Pisarzhevskii Institute
of Physical Chemistry of the National Academy of Sciences of Ukraine; https://orcid.org/0000-0002-2380-0145.
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| id | oai:ojs.journals.uran.ua:article-360726 |
| institution | Journal of Organic and Pharmaceutical Chemistry |
| keywords_txt_mv | keywords |
| language | English |
| last_indexed | 2026-06-11T01:00:23Z |
| publishDate | 2026 |
| publisher | National University of Pharmacy |
| record_format | ojs |
| resource_txt_mv | ophcjnupheduua/9d/b4768e94f92f362bf711ce372e343f9d.pdf |
| spelling | oai:ojs.journals.uran.ua:article-3607262026-06-10T08:24:31Z Catalytic Properties of Hierarchical Ti-MFI Zeolites in the Synthesis of Cyclic Carbonates from Styrene Under CO2 Pressure Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 Kyryliuk, Dmytro V. Shvets, Oleksiy V. styrene cyclic carbonate styrene oxide hierarchical zeolites titanosilicates стирол циклічний карбонат епоксид стиролу ієрархічні цеоліти титаносилікати Hierarchical titanosilicate zeolites of the MFI structural type (zeolites with the MFI framework topology according to the classification of the International Zeolite Association) showed a high catalytic activity in the synthesis of cyclic carbonate from styrene in the presence of tert-butyl hydroperoxide as an oxidant. It has been shown that the combination of the redox properties of titanium centers with the acid-base characteristics of the zeolite matrix ensures the efficient implementation of the tandem process within a single reaction medium. The results obtained confirm the potential of titanium-containing zeolites as an effective platform for creating heterogeneous catalysts for the direct conversion of olefins into cyclic carbonates. Ієрархічні титаносилікатні цеоліти структурного типу MFI (цеоліти з топологією MFI згідно з класифікацією Міжнародної цеолітної асоціації) показали високу каталітичну активність у реакціях одержання циклічного карбонату зі стиролу в присутності трет-бутилгідропероксиду як окисника. Доведено, що поєднання окисно-відновних властивостей титанових центрів із кислотно-основними характеристиками цеолітної матриці забезпечує ефективну реалізацію тандемного процесу в одному реакційному середовищі. Отримані результати підтверджують перспективність титановмісних цеолітів як ефективної платформи для створення гетерогенних каталізаторів прямого перетворення олефінів на циклічні карбонати. National University of Pharmacy 2026-06-10 Article Article application/pdf https://ophcj.nuph.edu.ua/article/view/360726 10.24959/ophcj.26.360726 Journal of Organic and Pharmaceutical Chemistry; Vol. 24 No. 2 (2026): Issue in Progress; 14-20 Журнал органической и фармацевтической химии; Том 24 № 2 (2026): Issue in Progress; 14-20 Журнал органічної та фармацевтичної хімії; Том 24 № 2 (2026): Issue in Progress; 14-20 2518-1548 2308-8303 en https://ophcj.nuph.edu.ua/article/view/360726/349948 Copyright (c) 2026 National University of Pharmacy http://creativecommons.org/licenses/by/4.0 |
| spellingShingle | стирол циклічний карбонат епоксид стиролу ієрархічні цеоліти титаносилікати Kyryliuk, Dmytro V. Shvets, Oleksiy V. Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title | Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title_alt | Catalytic Properties of Hierarchical Ti-MFI Zeolites in the Synthesis of Cyclic Carbonates from Styrene Under CO2 Pressure |
| title_full | Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title_fullStr | Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title_full_unstemmed | Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title_short | Каталітичні властивості ієрархічних Ti-MFI цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском СО2 |
| title_sort | каталітичні властивості ієрархічних ti-mfi цеолітів у процесі одержання циклічних карбонатів зі стиролу під тиском со2 |
| topic | стирол циклічний карбонат епоксид стиролу ієрархічні цеоліти титаносилікати |
| topic_facet | styrene cyclic carbonate styrene oxide hierarchical zeolites titanosilicates стирол циклічний карбонат епоксид стиролу ієрархічні цеоліти титаносилікати |
| url | https://ophcj.nuph.edu.ua/article/view/360726 |
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