СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ

AgEDTA complexonate was synthesized, the manner of coordination of the Argentum (I) ion to the functional groups of complexone was determined. It was found that the solid complex precipitates from the solution in the form of a fine powder. It is shown that the size and shape of nanoparticles of Arge...

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Date:2021
Main Authors: Berezhnytska, Оleksandra, Viktoriia, Semeniv, Karyna, Sikorska, Kamenska , Tetyana, Khrokalo, Ludmyla, Trunova, Olena
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Language:English
Published: V.I.Vernadsky Institute of General and Inorganic Chemistry 2021
Online Access:https://ucj.org.ua/index.php/journal/article/view/279
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Journal Title:Ukrainian Chemistry Journal
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Ukrainian Chemistry Journal
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author Berezhnytska, Оleksandra
Viktoriia, Semeniv
Karyna, Sikorska
Kamenska , Tetyana
Khrokalo, Ludmyla
Trunova, Olena
author_facet Berezhnytska, Оleksandra
Viktoriia, Semeniv
Karyna, Sikorska
Kamenska , Tetyana
Khrokalo, Ludmyla
Trunova, Olena
author_institution_txt_mv [ { "author": "Оleksandra Berezhnytska", "institution": "V.I.Vernadsky Institute of General and Inorganic Chemistry of NAS of Ukraine, Akad.Palladin Avenue, 32\/34, Kyiv, Ukraine, 03142" }, { "author": "Semeniv Viktoriia", "institution": "National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Prosp.Peremohy, Kyiv, Ukraine, 03056" }, { "author": "Sikorska Karyna", "institution": "National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Prosp.Peremohy, Kyiv, Ukraine, 03056" }, { "author": "Tetyana Kamenska ", "institution": "National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Prosp.Peremohy, Kyiv, Ukraine, 03056" }, { "author": "Ludmyla Khrokalo", "institution": "National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Prosp.Peremohy, Kyiv, Ukraine, 03056" }, { "author": "Olena Trunova", "institution": "V.I.Vernadsky Institute of General and Inorganic Chemistry of NAS of Ukraine, Akad.Palladin Avenue, 32\/34, Kyiv, Ukraine, 03142" } ]
author_sort Berezhnytska, Оleksandra
baseUrl_str https://ucj.org.ua/index.php/journal/oai
collection OJS
datestamp_date 2026-07-22T08:23:45Z
description AgEDTA complexonate was synthesized, the manner of coordination of the Argentum (I) ion to the functional groups of complexone was determined. It was found that the solid complex precipitates from the solution in the form of a fine powder. It is shown that the size and shape of nanoparticles of Argentum complexonate depend on the solvent-precipitator. A stable dispersed system based on the synthesized complexonate was obtained. The shape and position of the surface plasmon resonance bands confirm the presence of spherical nanoparticles with a size of 15–30 nm in both dispersed systems. Investigations of the biological activity of the powder of AgEDTA has shown that it has a high bactericidal effect against gram-positive bacteria.
doi_str_mv 10.33609/2708-129X.87.02.2021.95-106
first_indexed 2025-09-24T17:43:37Z
format Article
fulltext 95 UDC 546.57, 544.77 doi: 10.33609/2708-129X.87.02.2021.95-106 SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM О. S. Berezhnytska 1,2*, V. S. Semeniv 1,2, K. A. Sikorska 2, Т. А. Kamenska 2, L. A. Khrokalo 2, О. K. Trunova1 1 V. I. Vernadsky Institute of General and Inorganic Chemistry of the Ukrainian NAS, prospekt Pal­ ladina 32/34, 03142 Kyiv, Ukraine 2 National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», prospekt Pe­ remohy 37, 03056 Kyiv, Ukraine *е-mail: olekberez@gmail.com AgEDTA complexonate was synthesized, the manner of coordination of the Argentum (I) ion to the functional groups of complexone was determined. It was found that the solid complex precipitates from the solution in the form of a fine powder. It is shown that the size and shape of nanoparticles of Argentum complexonate depend on the solvent-precipitator. A stable dispersed system based on the synthesized complexonate was obtained. The shape and position of the surface plasmon resonance bands confirm the presence of spherical nan- oparticles with a size of 15–30 nm in both dispersed systems. Investigations of the biological activity of the powder of AgEDTA has shown that it has a high bactericidal effect against gram-positive bacteria. Keywords: nanosystem, Argentum, EDTA, complexonate, bactericidal effect. INTRODUCTION. The unquenchable in- terest in nanomaterials and nanosystems is due to their unique properties and the possi- bility of targeted synthesis of such materials, in particular nanoparticles with required size and predicted properties [1]. Increasing the resistance of pathogenic microorganisms to antibiotics and fungicides is the main problem of medicine. It is well known that silver com- pounds are active against 16 major species of microorganisms without damaging the benefi- cial microflora, which increases the interest of scientists in their study [2, 3]. For many years in a row, the study of the physicochemical and pharmacological proper- ties of precious metals, in particular gold and silver, has been topical. Whereas the use of gold compounds is limited due to the ambiguity of its properties, in particular toxicity [4–7], the anti- microbial properties of silver are not in doubt. To use nanoparticles in pharmaceutics, it is im- portant to consider the composition of the start- ing system to avoid additional toxic effects. There are many publications on the synthe- sis of silver nanoparticles, the study of their physical, chemical, and biological properties. PHISICAL CHEMISTRY SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM 96 ISSN 2708-129X. Укр. хім. журн., 2021 These characteristiсs depend on many factors, such as the choice of the method of produc- tion, stabilizer and reducing agent, the size and morphological shape of the obtained particles [8–10]. Despite the wide range of research re- sults presented, obtaining stable silver-based nanomaterials remains a challenge for re- searchers. Depending on the size, silver nanoparticles can be used as catalysts, bactericidal coatings for medical devices and water filters, drug de- livery media, electronic components, and bi- osensors, like preservatives and active ingre- dients in cosmetics, light filters in optics, and as antibacterial and therapeutic agents in me dicine [11–15]. The silver nanoparticles can enter the hu- man organism in a variety of ways, such as through the skin, orally, by inhalation, and injection, with different effects. Although the toxicity of silver nanoparticles is also contro- versial, the long-term use of AgNPs in various industries proves its safety [16–18]. The researchers’ attention to the green syn- thesis of AgNP is due to the effectiveness and environmental friendliness of this method. The reducing biological agent, which also acts as a stabilizer, is the main requirement of this synthesis. By selecting the plant extract, it is possible to obtain nanoparticles of the desired size. However, the disadvantages of this me thod are that biological reagents can contain many secondary compounds and metabolites, temperature restrictions inherent in enzymes. The consequence of thise is a low synthesis yield [19, 20]. Evaporation-condensation and laser abla- tion techniques are popular among the physical methods. Both methods allow obtaining nano particles of uniform size and high purity, be- cause they do not require the use of additional solvents, which can also emit toxic substances. However, such a synthesis requires cumber- some equipment and high energy costs. The agglomeration of the obtained AgNPs is also observed due to the absence of stabilizers in these methods [21, 22]. The most developed and diverse are chemi cal methods of obtaining silver nanoparticles, among which electrochemical synthesis pre- dominates, which allows one to control the size of nanoparticles by regulating the parameters of electrolysis; sonodecomposition using ultra sonic waves; synthesis in aqueous foams as a matrix; radiolysis; microwave synthesis, which allows one to obtain stable systems at the high concentration of AgNPs at the same tempera- ture and exposure, and others that allow one to obtain nanoparticles with a size in the range of 5–90 nm. A common approach to synthe- sis is the reduction of silver from its salts using a variety of organic solvents. Thus, particles are obtained, which are usually dispersed in an aqueous medium and require stabilization with surfactants [23, 24]. However, some methods do not require the use of an additional stabilizer. These are the Turkevich method or the citrate method, the reduction of ionic silver with glucose, as well as with the help of complexones. The use of simple techniques that do not require addi- tional complex equipment is the best way to solve the problem of synthesis of nanoparticles of required size both from a practical and an economic point of view [25–28]. Complexones are polydentate ligands, or- ganic chelating compounds consisting of ami- no acid elements. These compounds are widely used in medicine because they are a transport- ing agent. Important among the complexones UCJ № 2 / Vol. 87О. S. Berezhnytska, V. S. Semeniv, K. A. Sikorska, Т. А. Kamenska, L. A. Khrokalo , О. K. Trunova 97https://ucj.org.ua are nitriloacetic acid (NTA), ethylenediamine- tetraacetic acid (EDTA), and its structural iso- mer ethylenediaminedisuccinic acid (EDDS). The chelating agent increases the bioavaila- bility of the metal, promotes its accumulation, and increases biological activity. The main task of this work is the synthesis of silver complex- onates, their conversion to the disperse state, and the synthesis of colloidal solutions by the reduction of silver with complexones. This syn- thesis does not require an additional stabilizer, because the complexones have a diphilic struc- ture, ie are surfactants. The complexes of d-me tals based on complexones are characterized by a good solubility in water, high stability, and easy digestibility. The advantage of complex- ones is that they are excreted from the organ- ism in an unchanged state, which significant- ly depends on the stability of the complexone [29–31]. Besides, it was shown [32–35] that the use of EDTA as a reducing agent in chemical condensation allows one not only to stabilize the system but also to control the particle size depending on the solution pH. Thus, it is of interest to determine correlations between the properties of Argentum (I) complexonate and disperse systems obtained by the reduction of Argentum nitrate with Na2EDTA solution. EXPERIMENT AND DISCUSSION OF THE RESULTS The synthesis was performed in aqueous solutions at a concentration of the starting components of 5 ∙ 10-2 M and a ratio of the starting components of 1:2 and 2:1, metal salt (AgNO3) and complexone (Na2EDTA), respec- tively, pH=7–8. The choice of concentration is due to the reduction processes that occur at high concentrations, and pH of solutions. The complexes were precipitated from the solution with acetone or alcohol, filtered off and dried in a vacuum desiccator over calcium chloride (in a dark place). A white Na3[AgEDTA] pre- cipitate separated from the solution during precipitation and turned pink after filtration. The dry precipitate has a dark brown color due to the reduction of surface ions of silver. The synthesis of disperse systems was per- formed in aqueous solutions at a ratio of start- ing components of 1:2, 1:3, 1:5, 2:1, 2:5 for AgNO3 : Na2edta, respectively. Diluted solu- tions with a concentration of starting the com- ponents of 5∙10-4, 5∙10-3, 2.5∙10-4, 1∙10-3 M were chosen for the study because the necessary condition for obtaining highly disperse heter- ogeneous systems is to carry out reactions in dilute solutions, and an excess of one of the re- agents. In the course of the study it was found that the optimal concentration of solutions is 5∙10-3 M. A solution of Argentum nitrate was gradually added to Na2EDTA solutions under heating and with a magnetic stirrer, the pH was adjusted with a 0.1M NaOH solution and maintained at 8–8,5. The solutions were stirred at 60оC for 60 minutes. An IR spectrum was recarded to deter- mine the manner of coordination of Argen- tum to EDTA. The IR spectra were recorded on a Specord M80 spectrometer in a range of 400–4000 cm-1 in tablets with KBr. The absorption spectra of solutions were re- corded on a Specord M40 spectrophotometer in a range of 300–600 nm. Distribution diagrams of the obtained na- nosystems were investigated by the method of dynamic light scattering on «ZetaSizerMal- vern». The powder micrographs were taken on a Hitachi H–800 scanning electron microscope. The antibacterial effect of the complex was determined on a powder sample of AgEDTA. PHISICAL CHEMISTRY SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM 98 ISSN 2708-129X. Укр. хім. журн., 2021 The test was performed by the disk-diffusion method on a solid culture medium (agar). Strains of Bacillus subtilis UKM B–5006T (gram-negative spore-forming bacterium) and Escherichia coli UKM B–906 (gram-negative rod-shaped bacterium) were used as experi- mental cultures. The inoculants were obtained the day before the test on a liquid culture me- dium, meat-peptone broth (BCH), followed by dilution with a sterile physiological solutions. The density of the inoculant was adjusted to 0.5 on the McFarland scale. The Petri dishes with agar were inoculated with cultures and filter paper disks moistened with distilled water and an AgEDTA powder sample were spread over the inoculated surface. The culture medium was incubated at 37°C for three days. The size of the zones of inhibition of bacterial growth was measured with a caliper in mm. Analysis of the IR spectra indicates that the undissociated carboxyl group is not involved in the complexation process. In the spectra of the complex there is a shoulder at 1660 cm-1, which corresponds to the valence vibrations of uncoordinated (COOH) groups. In the complexonate spectra, the bands νas(COO-) and νs(COO-) in the region of 1310– 1400 cm-1 and 1500–1600 cm-1 are significant- ly shifted to the low frequencies relative to the free ligand, which indicates the formation of bonds of metal ions to dissociated carboxyl groups. The splitting of the band νsCOO- in- dicates the non-equivalence of carboxyl group binding and different covalent and donor-ac- ceptor bonding mechanisms [36]. The diffe rence in the position of the bands νs(COO-) and νas(COO-) (Δν~200 см-1) indicates their monodentate coordination to the metal ion. Table 1 Assignment of frequencies in the IR spectrum of metal complexonates ν(M-N) ν(M-O) ν (CC) ν (CN) ν s COO- δ(СН2) ν as COO- νCOOH νH2O AgEDTA 480, 445, 390 540, 565, 582, 610 920, 875 1120 1400, 1340 1450пл 1582, 1640sh. 1660 sh. 3410, 3288sh. Na2EDTA – – 920, 860 1095 1436 1460 1640 1670 3408 5∙10-3M aqueous solutions of complex- onates were prepared for investigation of them by the absorption spectroscopy method. Upon dissolution, the complexonates form dark orange solutions. The color of the solution is due to the complexing central ion and the dis- persion of the obtained systems. The presence of a surface plasmon resonance (SPR) band in the electron absortion spectra, which is a col- lective oscillation of metal particles smaller than the wavelength of electromagnetic radi- ation, indicates the presence of nanoparticles. From the shape and position of this band, we can conclude about the dispersion, shape, and size distribution of nanoparticles. In Fig. 1, the maximum of the SPR band at ~ 410 nm indicates a high dispersion of the system. The particle size is in the range of 10–20 nm. The position of the band indicates the sphericity of the particles. UCJ № 2 / Vol. 87О. S. Berezhnytska, V. S. Semeniv, K. A. Sikorska, Т. А. Kamenska, L. A. Khrokalo , О. K. Trunova 99https://ucj.org.ua Figure 1 SPR bands of AgEDTA 1–3 hours, 2–21 day. It is known that disperse systems are cha racterized by both habituation and aging. To analyze the aggregative stability of the systems, they were studied for a long time. After 3 weeks, the color of the solution became more saturated, however, as can be seen from Fig.1. (curve 2), the maximum of the band shifted by 5 nm to the long-wavelength region, which indicates the recrystallization of small particles with their subsequent adsorption on larger particles. For the most part, when a critical concentration of micelle formation is reached, smaller spherical particles are formed, which are thermodynami- cally more stable and less prone to coagulation. If the reduction processes continue in the sys- tem, the concentration of particles will increase, which, in turn, will promote coagulation and cause the particles to enlarge, possibly with the formation of ellipses or nanofibers [35, 37, 38]. The shape of the band has changed, and it has become narrower, which indicates the prevailing radius of particles of the same size and the habituation of the disperse system. The increase in intensity indicates an increase in the number of nanoparticles in the system, that is, about the «maturation» of the colloi- dal solution. For the solutions prepared with EDTA, the particle size was large, but the band was much narrower, which indicates a small- er distribution of nanoparticles by radius. For cooling solutions of silver (I) disperse systems obtained by reduction with EDTA, the elec- tronic absorption spectra are shown in Fig. 2. The shape and position of the surface plasmon resonance (SPR) band substantially depend on the concentration and time [38]. a b Figure 2 SPR band for 0.005M solutions of the system (AgNO3): Na2EDTA after 7, 10 and 14 days (a) micrograph of the system after 14 days, scale mark 100 nm PHISICAL CHEMISTRY SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM 100 ISSN 2708-129X. Укр. хім. журн., 2021 With an increase in the complexone con- centration in the system, the particle size and polydispersity of the system increase, therefore, to obtain stable dispersions, the concentration of the initial components should not exceed 5 ∙ 10-3 M. This is due to the high reducing abi lity of EDTA. The studies carried out showed that the systems remained stable for a long time, and with time the SPR band became narrower, and the maximum became clearer (Fig. 2). Within 2 months from the moment of syn- thesis, the shape and position of the SPR band and the color of the solution did not change. The position of the maximum and the width of the SPR band of the complexonate solution and the colloidal solution were different, which indicates a different shape and size of nano- particles. This may be due to different micelle formulas and different charge of the colloidal particle. Schematically, the formation of silver nano particles can be written as follows, based on the high reducing properties of EDTA [39–41]: Ag+ hν Ag0 For the same reasons, a problem arises when writing the micelle formula. Based on the classical approach, if silver is reduced to form metal nanoparticles, the micelle formula has the following form: {mAg nAg+(n-x)NO3 -}х+x NO3 - . In the case of a complexonate solution, we can assume the reduction of surface molecules, where a complex ion acts as a stabilizer, and then a micelle can be depicted as follows: {mAg nAgedta3-3(n-x)Na+}3х-3x Na+ An analysis of the distribution diagrams (Fig. 3) shows the nanodispersity of the system with the predominant radius of particles of the same size. a b Figure 3 Diagrams to the distribution of particles behind the AgEDTA after 1 day (a), after 21 day (b). We can state the uniform distribution of the dispersed phase in the dispersion medium. As can be seen from the diagram, at first small particles prevail in the system; after 21 days, the particle size in the system increases, which is due to the recrystallization of small particles, but the system is stable. The particles absorbing in the range of 410–440 nm have a characteristic spherical shape, which is confirmed by micrographs. UCJ № 2 / Vol. 87О. S. Berezhnytska, V. S. Semeniv, K. A. Sikorska, Т. А. Kamenska, L. A. Khrokalo , О. K. Trunova 101https://ucj.org.ua As can be seen from the micrograph of the pre-dried solution (Fig. 4), even when the sample dries, the nanoparticles do not ag- glomerate, but retain their original size and spherical symmetry. Small spherical particles are attached to a fibrous surface, which can be ethylenediaminetetraacetate (Fig. 5). This in- dicates the stabilizing effect of EDTA. a b c Figure 4 Distribution diagram and micrograph for systems (AgNO3): Na2EDTA, c = 0.005М, scale mark 100 nm (b) 500 nm (c). It is known that the method of physical con- densation, namely the replacement of the sol- vent, allows the targeted control of the particle size. Therefore, it was of interest to precipitate complexonates with various solvents. a b Figure 5 SEM micrographs of the test solutions, scale mark 100 nm (a) and 200 nm (b) Already in the process of salting out, it was noticeable that the powder particles will have different shapes. So, when salting out from ace- tone, the particles simply settled to the bottom, like «classic» sediment or spherical particles, which precipitate under the action of gravity due to the violation of aggregative and sedi- mentation stability. The process of precipita- tion occurred fairly quickly. In the case of alco- hol as a precipitant, the salting-out process was similar to a «blizzard» and was significantly extended in time. Using the method of electron microscopy, it was shown that, depending on the solvent with which the complexes were precipitated, nan- oparticles can have different shapes and sizes. Figure 6a shows micrographs of an AgEDTA powder obtained by precipitation from ace- tone, and in Fig. 6b, by precipitation from etha- nol. When precipitated with acetone, the nano powder particles have a spherical shape with layered surface morphology. The particle size is in the range of 20-33 nm, which correlates fairly well with previous studies. Salting out the silver complexonate with alcohol makes it possible to obtain elongated particles. The PHISICAL CHEMISTRY SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM 102 ISSN 2708-129X. Укр. хім. журн., 2021 micrographs of this powder are significantly different, since the particles are in the form of nanowires, and the surface morphology is fi- brous, like the particles. The difference in the photomicrographs of the samples makes it possible to envisage different properties of the obtained complexonates. a b Figure 6 Photomicrographs of AgEDTA pow- der sample obtained by alcohol salting (a) acetone salting (b). The antibacterial activity was studied using the example of a system containing spherical nanoparticles of AgEDTA, which was deter- mined from the size of the formed inhibition zone concerning two types of pathogenic bac- teria: Bacillus subtilis and Escherichia coli. Af- ter 72 hours of cultivation in an incubator at 37° C, zones appear in the form of bright stains and transparent concentric circles around the disks with powder (Fig. 7). This indicates the effectiveness of the sample, in particular, in- hibition of bacterial growth. In the culture medium of E. coli, a moderately pronounced zone of growth inhibition is observed, 0.5–3 mm in size (Fig. 7a). In the culture of B. sub­ tiles, Fig. 7b, non-concentric zones, 2–10 mm in size, are very well pronounced. a b Figure 7. Inhibition zone size, against two types of pathogens: (a) E. coli UKM B-906, (b) B. subtilis UKM B-5006T. CONCLUSIONS AgEDTA complexonate, a nanodisperse sys- tem based on it, and a nanosilver solution have been obtained by the reduction of Argentum (I) nitrate with a Na2EDTA solution were obtained. The particle size of the precipitated complex- onate powder was in the range of 20–70 nm de- pending on the solvent used in the precipitation process. It has been found that the size and shape of the particles depend on the nature of the sol- vent precipitator. Studies of colloidal solutions have shown that reduction using EDTA allows one to obtain nanodisperse systems with a par- ticle size of the dispersed phase of 10–30  nm. Such systems are quite stable and do not re- quire additional stabilization. We can assume that due to the low stability constant of silver (I) complexonate in both cases there are metal na- noparticles in the system. Metal nanoparticles are stabilized by the complex ion AgEDTA3- in the case of complexonate, and in the case of colloidal solutions, the stabilizer is a solu- tion of Na2edta. The particle size of AgEDTA powder is 20–50 nm when precipitated with ac- etone, and the diameter of the alcohol-precip- itated nanowires is 25–65 nm. The larger par- ticle size of the powder compared to solutions (10–30 nm) is due to its conglomeration. UCJ № 2 / Vol. 87О. S. Berezhnytska, V. S. Semeniv, K. A. Sikorska, Т. А. Kamenska, L. A. Khrokalo , О. K. Trunova 103https://ucj.org.ua Studies of biological activity have shown that the AgEDTA complex has insignificant antibacterial activity against gram-negative bacteria but proved to be quite effective versus gram-positive ones due to differences in the composition and thickness of the outer mem- brane of pathogens. Thus, the studies show the effectiveness of the method of complexation and reduction of complexone to obtain stable highly disperse systems of silver. The work was performed within the framework of the target program of basic research of the National Acade- my of Sciences of Ukraine "Prospective basic research and innovative developments of nanomaterials and nanotechnologies for the needs of industry, health care and agri- culture" 31/20-H СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ Бережницька О. С. 1,2, Семенів В. І. 1,2, Сікорська К. А. 2, Каменська Т. А. 2, Хрокало Л. А. 2, Трунова О. К.1 1 Інститут загальної та неорганічної хімії ім. В. І. Вернадського НАН України, просп. Академіка Палладіна, 32/34, Київ 03142, Україна 2 Національний технічний університет Ук­ раїни “Київський політехнічний інститут” імені Ігоря Сікорського, просп. Перемоги, 37, Київ 03056, Україна е-mail: olekberez@gmail.com Синтезовано комплексонат AgEDTA, встановлено спосіб координації іону арґен туму (І) з функціональними групами комп- лексону. Різниця в положенні смуг валент- них симетричних та асиметричних коли- вань карбоксильної групи свідчить про їхню монодентатну координацію до іону металу. Встановлено, що твердий комплекс осаджується з розчину у вигляді дрібно- дисперсного порошку. Показано, що роз- мір та форма наночастинок порошку комп- лексонату аргентуму залежать від розчин- ника-осаджувача. Отримано стійкі наносистеми двома шляхами: розчиненням твердого комплек- сонату та відновленням срібла розчином ЕДТА. Форма та положення смуг поверхне- во плазмонного резонансу підтверджують наявність в обох дисперсних системах сфе- ричних наночастинок розміром 15–30 нм. Звуження лінії та зростання інтенсивності смуги ППР свідчить про звикання дисперс них систем, а відсутність суттєвого зміщен- ня максимуму смуги – про агрегативну та седиментаційну стійкість колоїдних розчи- нів. Положення максимуму та ширина сму- ги ППР розчину комплексонату та коло- їдного розчину відрізнялися, що свідчить про різний розмір наночастинок. Методом електронної мікроскопії встановлено фор- му, дисперсність та морфологію отриманих наносистем. Показано, що AgNPs одержа- ні методом відновлення, з використанням як відновлюваного агента розчину ЕДТА, мають сферичну форму, а їхній розмір зна- ходиться в діапазоні 10–30 нм. У випадку комплексонату AgEDTA розмір частинок порошку при осадженні ацетоном стано- вить 20–50 нм, при осадженні спиртом – діаметр отриманих нанодротів 25–65 нм. PHISICAL CHEMISTRY SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM 104 ISSN 2708-129X. Укр. хім. журн., 2021 Діаграми розподілу дисперсних систем до- бре корелюють з електронними мікрофото- графіями як щодо розподілу частинок, так і їхнього переважаючого радіусу. Дослідження бактерицидної дії пока- зали, що комплекс AgEDTA має незнач- ну антибактеріальну активність проти грамнегативної бактерії, є ефективним про- ти грампозитивної, що зумовлено різницею складу та товщиною зовнішньої мембрани патогенів. Ключові слова: наносистеми, срібло, комплексонат, EDTA, бактерицидна дія. REFERENCES 1. Lee S.H., Sung J.H. Park, T.H. Nanomate- rial-Based Biosensor as an Emerging Tool for Biomedical Applications. Annals of Bio­ medical Engineering. 2012. 40: 1384–1397. 2. Zhao G., Stevens SE Jr. Multiple parame- ters for the comprehensive evaluation of the susceptibility of Escherichia coli to the silver ion. 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spelling oai:ojs2.1444248.nisspano.web.hosting-test.net:article-2792026-07-22T08:23:45Z SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ Berezhnytska, Оleksandra Viktoriia, Semeniv Karyna, Sikorska Kamenska , Tetyana Khrokalo, Ludmyla Trunova, Olena nanosystem, Argentum, EDTA, complexonate, bactericidal effect. AgEDTA complexonate was synthesized, the manner of coordination of the Argentum (I) ion to the functional groups of complexone was determined. It was found that the solid complex precipitates from the solution in the form of a fine powder. It is shown that the size and shape of nanoparticles of Argentum complexonate depend on the solvent-precipitator. A stable dispersed system based on the synthesized complexonate was obtained. The shape and position of the surface plasmon resonance bands confirm the presence of spherical nanoparticles with a size of 15–30 nm in both dispersed systems. Investigations of the biological activity of the powder of AgEDTA has shown that it has a high bactericidal effect against gram-positive bacteria. V.I.Vernadsky Institute of General and Inorganic Chemistry 2021-03-19 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/279 10.33609/2708-129X.87.02.2021.95-106 Ukrainian Chemistry Journal; Vol. 87 No. 2 (2021): Ukrainian Chemistry Journal; 95-106 Украинский химический журнал; ##issue.vol## 87 ##issue.no## 2 (2021): Украинский химический журнал; 95-106 Український хімічний журнал; Том 87 № 2 (2021): Український хімічний журнал; 95-106 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/279/156 Copyright (c) 2021 Оleksandra Berezhnytska, Semeniv Viktoriia, Sikorska Karyna, Tetyana Kamenska , Ludmyla Khrokalo, Olena Trunova https://creativecommons.org/licenses/by-nc/4.0
spellingShingle Berezhnytska, Оleksandra
Viktoriia, Semeniv
Karyna, Sikorska
Kamenska , Tetyana
Khrokalo, Ludmyla
Trunova, Olena
СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title_alt SYNTHESIS AND PROPERTIES OF NEW NANOSYSTEMS OF ARGENTUM
title_full СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title_fullStr СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title_full_unstemmed СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title_short СИНТЕЗ ТА ВЛАСТИВОСТІ НОВИХ НАНОСИСТЕМ АРҐЕНТУМУ
title_sort синтез та властивості нових наносистем арґентуму
topic_facet nanosystem
Argentum
EDTA
complexonate
bactericidal effect.
url https://ucj.org.ua/index.php/journal/article/view/279
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