New water-soluble silver nanocomposites

Горбунова, М. Н.; Kiselkov, Dmitriy; Небогатиков, В. О.

doi:10.1134/s1070427215020214

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…Reviews and articles concerning the cytotoxic activity of silver have been published recently [23][24][25][26][27]. We have synthesized nanocomposites of silver and N-vinylpyrrolidone-N,N-diallyl-N'-acetylhydrazine copolymer, exhibiting high activity toward MS melanoma cells [5].…”

Section: Resultsmentioning

confidence: 99%

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Copolymers of betulin esters and silver nanocomposites based on them

et al. 2016

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New biologically active silver nanocomposites based on the copolymer of lup-20(29)-ene-3,28-diol 28-O-vinylbenzoate with N-vinylpyrrolidone were prepared by the borohydride method. The formation of spherical nanoparticles with a mean diameter of 67 nm was confi rmed by scanning electron microscopy. The synthesized copolymers and silver nanocomposites exhibit cytotoxic activity and show promise for the development of new materials for medical purposes.Polyfunctional macromolecular compounds exhibit high performance as polymer matrices stabilizing metal nanoparticles and preventing their aggregation. The presence of functional groups of comonomers in copolymers favors their effi cient interaction with metal nanoparticles in early steps of their formation, controlling their growth, size, aggregation, and distribution in the polymer matrix and ensuring synergism of unique properties of the polymer matrix and metal nanoparticles.It is known from the literature that the particle stability is strongly infl uenced by the nature of the nanostabilizing matrix [1,2]. Highly stable hydrosols with isolated silver nanoparticles were prepared using the following matrix materials: water-soluble poly-N-vinylpyrrolidone [2-4] and its copolymer [5], 1-vinyl-1,2,4-triazole homo-and copolymers [6,7], and 2,2-diallyl-1,1,3,3-tetraethylguanidinium chloride copolymers [8].Natural monomers and polymers are also used as nanostabilizing substances [9][10][11], and nanocomposites prepared with them exhibit a broad spectrum of biological activity.This study was aimed at synthesis of copolymers of betulin С-28 esters [lup-20(29)-ene-3,28-diol 28-О-vinylacetate (BVA) and 28-О-vinylbenzoate (BVB)] with N-vinylpyrrolidone and acrylonitrile in the bulk in the presence of a radical initiator, azobis(isobutyronitrile) (AIBN), and at preparation of new water-soluble composites with silver nanoparticles stabilized with these triterpene-containing copolymers. EXPERIMENTALBetulin was prepared by the procedures described in [12].Vinylacetic (VAA) and vinylbenzoic (VBA) acids (Lancaster) were used without additional purifi cation.N-Vinylpyrrolidone (VP) (Lancaster) was dried over KОН and vacuum-distilled; the fraction with bp 65°С/1.5 mmHg, n D 20 1.5117, was used. Vinyl acetate (VA) (Lancaster) was purifi ed by distillation; the fraction with bp 72°С, n D 20 1.3951, was used.Acrylonitrile (AN) (Alfa Aesar) was purifi ed by distillation; the fraction with bp 78°С, n D 20 1.3910, was used.BVA and BVB were prepared as described in [13]. A mixture of 0.5 g (0.11 mmol) of betulin, 1.8 g (0.9 mmol) of dicyclohexylcarbodiimide (DCC), 0.28 g

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Section: Resultsmentioning

confidence: 99%

“…Highly stable hydrosols with isolated silver nanoparticles were prepared using the following matrix materials: water-soluble poly-N-vinylpyrrolidone [2][3][4] and its copolymer [5], 1-vinyl-1,2,4-triazole homo-and copolymers [6,7], and 2,2-diallyl-1,1,3,3-tetraethylguanidinium chloride copolymers [8].…”

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Copolymers of betulin esters and silver nanocomposites based on them

et al. 2016

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“…Так, за последние несколько лет на-ми были синтезированы мезогенные 4-(2,3-эпокси- [29] и многие другие жидкокристаллические объекты. При этом все синтезированные соединения обла-дают полезными качествами, проявляя свойства либо эффективных жидкокристаллических ста-ционарных фаз для анализа и разделения струк-турных изомеров и близкокипящих органических веществ различной химической природы [30,31], либо универсальных модификаторов композиций ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ на основе термопластов и каучуков [32,33], а так-же могут быть использованы как допанты коммер-ческих жидкокристаллических материалов для улучшения их эксплуатационных характеристик [34,35]. Кроме того, отличительной особенностью соединений подобного рода является наличие в структуре полярных и химически активных замес-тителей, что дает возможность проводить их даль-нейшую химическую модификацию с целью соз-дания функциональных материалов с заданными свойствами как мезогенной природы, так и на ос-нове макрогетероциклов для высокотехнологич-ных областей науки и техники.…”

Section: Introductionunclassified

Rod-Like Mesogenes with Three Aromatic Rings and Chiral Terminal Substituent

Kuvshinov¹,

Potemkina²,

Kuvshinova³

et al. 2017

Liq. Cryst. and their Appl.

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“…Использование подобных систем в качестве неподвижных фаз для газо-мезофазной хроматографии позволяет резко повы-сить структурную селективность сорбентов по сравнению с известными жидкими и ЖК стацио-нарными фазами. Указанные ЖК обладают и дру-гими интересными полезными качествами, прояв-ляя свойства универсальных модификаторов ком-позиций на основе термопластов и каучуков [14,15], а также могут быть использованы как моди-фикаторы коммерческих ЖК-материалов для улучшения их эксплуатационных характеристик [16,17].…”

Section: Introductionunclassified