排序方式: 共有21条查询结果,搜索用时 15 毫秒
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S. M. Dolotov V. S. Miroshnikov T. A. Chibisova Sin Su-Lan O. V. Venidiktova T. M. Valova A. A. Dunaev Yu. P. Strokach V. A. Barachevsky V. F. Traven’ 《Russian Chemical Bulletin》2007,56(5):904-909
The photochromic properties and aggregation processes of merocyanine forms of indoline spiropyrans of the coumarin series
in the block and film poly(methyl methacrylate) (PMMA) were studied and compared by spectral and kinetic methods. Photochromism
of the synthesized compounds depends on their structure. The efficient formation of J-aggregates was observed for indoline
spiropyrans of the coumarin series based on 8-formyl-7-hydroxy-4-methylcoumarin and 3-formyl-4-hydroxycoumarin.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 870–875, May, 2007. 相似文献
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B. G. Milevsky N. P. Solov’eva T. A. Chibisova V. N. Yarovenko E. S. Zayakin V. V. Chernyshev M. M. Krayushkin V. F. Traven 《Russian Chemical Bulletin》2012,61(12):2311-2321
Novel hydrazones were obtained from thiooxamohydrazides and 3-3-formyl-4-hydroxycoumarin. According to data from NMR spectroscopy and X-ray diffraction, the coumarin fragment in the compounds obtained exists as 4-hydroxycoumarin or chromane-2,4-dione. When dissolved in dimethyl sulfoxide, these hydrazones undergo fragmentation into derivatives of 1,3,4-thiadiazole and 4-hydroxycoumarin. 相似文献
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A. V. Manaev T. A. Chibisova K. A. Lyssenko M. Yu. Antipin V. F. Traven’ 《Russian Chemical Bulletin》2006,55(11):2091-2094
New boron chelates were synthesized by the reactions of 3-acetyl-4-hydroxycoumarin and 8-acyl-7-hydroxy-4-methylcoumarins
with boron trifluoride etherate and hydroxybenzodioxaborole. The structure of 3-acetyl-4-difluoroboryloxycoumarin containing
an intramolecular C=O...B coordination bond was established by X-ray diffraction.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2012–2015, November, 2006. 相似文献
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V. A. Barachevsky R. E. Karpov O. V. Venidiktova T. M. Valova Yu. P. Strokach V. S. Miroshnikov T. A. Chibisova V. F. Traven 《Russian Chemical Bulletin》2005,54(10):2425-2431
The photochromic properties and aggregation processes of merocyanine forms of indoline spiropyrans of the coumarin series
in solutions were studied by spectral and kinetic methods. Photochromism of the compounds synthesized depends on their structure.
The efficient formation of J-aggregates was found for indoline spiropyrans 1a,b under UV irradiation and merocyanines 3a,b, which is indicated by the appearance of absorption and fluorescence bands in the visible spectral region and the resonance
character of fluorescence.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2350–2356, October, 2005. 相似文献
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V. F. Traven’ I. V. Ivanov A. V. Panov O. B. Safronova T. A. Chibisova 《Russian Chemical Bulletin》2008,57(9):1989-1995
Aromatic imines, namely, 5-formyl-6-hydroxy-4-methyl- and 8-formyl-7-hydroxy-4-methylcoumarin derivatives, have been synthesized.
A dependence of their spectral characteristics (1H NMR spectra, electronic absorption spectra) from the solvent (DMSO, CHCl3, DMF, acetonitrile, MeOH) has been studied. The solvatochromic effects observed for a number of imines, first of all, for
7-hydroxy-4-methyl-8-(4′-nitrophenylimino)methyl-2H-1-benzopyran-2-one, were related to their E/Z-isomerization with respect to the C=N bond based on the quantum chemical calculations by the AM1, PM3, PPP CI methods.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1954–1960, September, 2008. 相似文献
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V. F. Traven I. V. Ivanov V. S. Lebedev T. A. Chibisova B. G. Milevskii N. P. Solov’eva V. I. Polshakov G. G. Alexandrov O. N. Kazheva O. A. Dyachenko 《Russian Chemical Bulletin》2010,59(8):1605-1611
According to 1? and 13? NMR data, enamines of 3-formyl-4-hydroxycoumarin exist in the keto enamine tautomeric form and undergo Z/E-isomerization around the C=C bond in CDCl3, DMSO-d6, and CD3OD at room temperature. The activation energies of ?/Z-isomerization were measured experimentally and calculated by the B3LYP/6-311++G(d,p) method. An X-ray diffraction study showed that 3-(benzyliminomethyl)chromane-2,4-dione in the crystalline state exists as a mixture of two keto enamine isomers. 相似文献