排序方式: 共有19条查询结果,搜索用时 31 毫秒
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DS Zhulai SA Bugaychuk GV Klimusheva TA Mirnaya VN Asaula VI Handziuk 《Liquid crystals》2017,44(8):1269-1276
The class of thermotropic ionic liquid crystals (LCs) of the metal alkanoates possesses a number of unique properties, such as intrinsic ionic conductivity, high dissolving ability and ability to form time-stable mesomorphic glasses. These ionic LCs can be used as nanoreactors for the synthesis and stabilisation of different types of nanoparticles (NPs). Thus, some semiconductors, metals and core/shell NPs were chemically synthesised in the thermotropic ionic liquid crystalline phase (smectic A) of the cadmium octanoate (CdC8) and of the cobalt octanoate (CoC8). By applying the scanning electron microscopy, the cadmium and cobalt octanoate composites containing CdS, Au, Ag and core/shell Au/CdS NPs have been studied. NPs’ sizes and dispersion distribution of the NPs’ size in the nanocomposites have been obtained. 相似文献
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Yu. A. Gorokh N. A. Aksenova A. B. Solov’eva V. A. Ol’shevskaya A. V. Zaitsev M. A. Lagutina V. N. Luzgina A. F. Mironov V. N. Kalinin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2011,85(5):871-875
The influence of amphiphilic polymers polyvinylpyrrolidone, poly(ethylene oxide), poly(vinyl alcohol), and pluronic F127 (propylene
oxide-ethylene oxide triblock copolymer) on the catalytic activity of a number of water-soluble metal-free porphyrin photosensitizers
was studied in the reaction of tryptophan photooxidation in aqueous solution. The introduction of the specified polymers was
found to enhance the activity of carbon-substituted tetrafluorophenylporpyrin, photoditazine, and dimegin. It was ascertained
that introduction of polyvinylpyrrolidone had the strongest effect on the increase in the photooxidation process rate; the
change in the activity of porphyrins was 30–70%. The introduction of poly(ethylene oxide), poly(vinyl alcohol), and pluronic
F127 was shown to enhance the rate of the process by 10–40%. It was concluded that this polymer effect was connected with
the dissociation of aggregates, in which form porphyrin molecules were present in aqueous solutions, as indicated by an increase
in fluorescence intensity of porphyrins. The introduction of polymers resulted in a bathochromic shift of the fluorescence
bands for all porphyrins, which accounted for the formation of complexes of porphyrin sensitizers with the polymers. 相似文献
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N. N. Glagolev V. E. Belyaev V. M. Rzheznikov A. B. Solov’eva L. E. Golubovskaya Yu. I. Kiryukhin V. N. Luzgina 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2009,83(13):2362-2367
It was shown that carrying out the reaction of cholesterol photosensitized oxidation in the presence of porphyrins immobilized
on the hydrolyzed copolymer of tetrafluorethylene and H+ form of perfluoro-3,6-dioxo-5-methyl-6-sulfonylfluorideoctene-1 leads to the formation of not previously described new products:
6β-phormyl-B-norcholestan-3β,5β-diol, 6β-chlorocholestan-3β,5α-diol, cholestan-3β,5α,6β-triol, and 5α-chlorocholestan-3β,6β-diol. 相似文献
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R. P. Evstigneeva S. E. Gribkova V. N. Luzgina A. B. Solov'eva E. A. Lukashovab 《Russian Chemical Bulletin》1994,43(9):1568-1571
Manganese(III) complexes of 5-(p-aminophenyl)-10,15,20-triphenylporphyrin, 2-(2-carboxyvinyl)-5, 10,15,20-tetraphenylporphyrin, and their derivatives containing electron-donor and electron-acceptor substituents have been synthesized. Manganese(III) porphyrinates (PMn) are catalytically active in the stereoselective hydroxylation of cholesterol to form 3,5-cholestanediol. The influence of substitutents in the porphyrin ring on the ability of PMn to associate in solution, the hydroxylation rate constants, and the turnover number of the catalyst are discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1656–1660, September, 1994.The present work was financially supported by the Russian Foundation for Basic Research (Projects No. 94-03-08070 and 93-03-18307). 相似文献
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Evstigneeva R. P. Luzgina V. N. Gorshkov A. Yu. Petrovskii P. V. Ol'shevskaya V. A. Zakharkin L. I. 《Russian Journal of Organic Chemistry》2003,39(1):141-143
New carboranyl-containing porphyrins were synthesized from 2-(2-carboxyvinyl)-5,10,15,20-tetraphenylporphine and 9-hydroxymethyl-m-carborane, 1-hydroxymethyl-o-carborane, and 3-amino-o-carborane. Physical properties of the products were studied. 相似文献
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Ol'shevskaya VA Nikitina RG Zaitsev AV Luzgina VN Kononova EG Morozova TG Drozhzhina VV Ivanov OG Kaplan MA Kalinin VN Shtil AA 《Organic & biomolecular chemistry》2006,4(20):3815-3821
The conjugates of porphyrin macrocycles with boron-containing polyhedra are under investigation as agents for binary treatment strategies of cancer. Aiming at the design of photoactive compounds with low-to-zero dark toxicity, we synthesized a series of carboranyl and monocarbon-carboranyl derivatives of protohaemin IX using the activation of porphyrin carboxylic groups with di-tert-butyl pyrocarbonate or pivaloyl chloride. The water-soluble 1,3,5,8-tetramethyl-2,4-divinyl-6(7)-[2'-(closo-monocarbon-carborane-1'-yl)methoxycarbonylethyl]-7(6)-(2'-carboxyethyl)porphyrin Fe(III) (compound 9) exerted no discernible cytotoxicity for cultured mammalian cells, nor did it cause general toxicity in rats. Importantly, 9 demonstrated dose-dependent activity as a phototoxin in photodynamic therapy of M-1 sarcoma-bearing rats. In animals injected with 20 mg kg(-1) of 9, the tumours shrank by day 3 after one single irradiation of the tumour with red laser light. Between 7 and 14 days post-irradiation, 88.9% of rats were tumour-free; no recurrence of the disease was detectable within at least 90 days. Protohaemin IX alone was without effect, indicating that boronation is important for the phototoxic activity of 9. This is the first study that presents the synthesis and preclinical in vivo efficacy of boronated derivatives of protohaemin as phototoxins. The applicability in photodynamic treatment broadens the therapeutic potential of boronated porphyrins beyond their conventional role as radiosensitizers in boron neutron capture therapy. 相似文献
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