排序方式: 共有32条查询结果,搜索用时 15 毫秒
1.
I. V. Komarov A. V. Turov S. V. Popov Yu. L. Slominskii M. Yu. Kornilov 《Theoretical and Experimental Chemistry》1991,27(2):179-182
It was established by PMR with lanthanide shift reagents that the charge in anionic cyanine dyes with a linear chromophore is concentrated at the ends of the polymethine chain, while in compounds containing a vinylene group in the chromophore it is concentrated in the region of the five-membered ring. The results are compared with the data from13C NMR spectroscopy and relaxation measurements in the presence of Gd(fod)3. The validity of the conclusions is also considered.Kiev University. Institute of Organic Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Teoreticheskaya i Éksperimental'naya, Vol. 27, No. 2, pp. 197–201, March–April, 1991. Original article submitted December 20, 1989. 相似文献
2.
A. I. Tolmachev Yu. L. Slominskii Zh. N. Belaya É. Z. Rodova 《Chemistry of Heterocyclic Compounds》1976,12(2):153-156
Glutaconic dialdehyde dianil salts, the ,-carbon atoms of which are included in dihydropyran, dihydrothiapyran, or N-methyltetrahydropyridine rings, were synthesized. Tricarbocyanine dyes with epoxydimethylene, epithiodimethylene, or N-methylepiminodimethylene groupings were synthesized by condensation of the dianil salts with a 2-methylbenzothiazole quaternary salt. The color of the dyes is discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 175–178, February, 1976. 相似文献
3.
M. A. Kudinova E. I. Maiboroda Yu. L. Slominskii A. I. Tolmachev 《Chemistry of Heterocyclic Compounds》1996,32(1):86-92
Asymmetrical carbocyanines with bridge groups in the chromophore, containing pyrylium, benzothiazolium, and pyridinium residues, were produced. The electronic and steric influence of the bridge groups on the spectral properties of the dyes was analyzed. The structure of the compounds obtained was confirmed by the data of electron spectroscopy and PMR spectroscopy. 相似文献
4.
5.
M. Yu. Kornilov S. V. Popov Yu. L. Slominskii A. V. Turov 《Theoretical and Experimental Chemistry》1989,24(4):491-493
Differential NMR spectroscopy has been used to derive the homonuclear Overhauser effect for protons in cyanine dyes, where the chromophore in each case contains an orthophenylene bridge. The data serve to define the polymethine chain conformation. A substituent in the meso position in the polymethine chain can alter the conformation.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 24, No. 4, pp. 505–507, July–August, 1988. 相似文献
6.
I. G. Davydenko Yu. L. Slominskii O. I. Kalchenko A. V. Gutov A. N. Chernega A. I. Tolmachev 《Russian Chemical Bulletin》2008,57(1):159-164
A procedure was developed for the synthesis of derivatives of the new heterocyclic system, benzo[cd]furo[2,3-f]indole, based on the cyclodehydration of 6-acylmethyloxy-1-alkyl-benzo[cd]indol-2(1H)-ones. Either 7- or 8-aryl derivatives of benzo[cd]furo[2,3-f]indol-4(5H)-ones can be prepared depending on the reaction conditions. The molecular and crystal structures of 7- and 8-phenylbenzo[cd]furo[2,3-f]indol-4(5H)-ones were established by X-ray diffraction. 相似文献
7.
B. I. Shapiro L. V. Chirkova A. I. Tolmachev Yu. L. Slominskii V. A. Kuzmin 《High Energy Chemistry》2010,44(5):418-422
The block mechanism of the formation of J-aggregates from the dimers of various dyes in an aqueous solution under the action
of the multiply charged Eu+3 cation was considered for the first time. It was shown that the structure and the position of the absorption maximum of the
mixed J-aggregates are determined by the length of the dye chromophore moiety. It was concluded that the mixed J-aggregates
are of interest as nanosized optical elements with varying optical and electronic properties depending on the structure of
cyanines used. 相似文献
8.
G. G. Dyadyusha S. V. Popov Yu. L. Slominskii 《Theoretical and Experimental Chemistry》1989,25(1):43-48
The spectral properties of dyes containing colored organic cations and anions have been investigated in solvents differing in polarity. It has been established that the color of cationic/anionic dyes in low-polarity solvents is governed by the properties of the ion pairs that are formed. The chromophores in the ion pairs of cationic/anionic dyes interact, and this moves the absorption bands away from each other and redistributes their intensities.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 1, pp. 47–53, January–February, 1989. 相似文献
9.
Piryatinskii Yu. P. Nazarenko V. G. Vasyuta R. M. Kachkovskii A. D. Maiboroda E. I. Zhukova O. A. Slominskii Yu. L. Tolmachev A. I. 《Theoretical and Experimental Chemistry》2003,39(4):230-234
Measurements were carried out for time-resolved fluorescence spectra of dye solutions containing thiacarbocyanine and its derivatives with ethylene and vinylene bridges in the polymethine chain. At low temperature, an additional band appears in the spectrum related to an intramolecular electronic transition. Analysis of the transition lifetimes and a quantum-chemical model indicated that this transition should be attributed to a short-lived asymmetrical component formed along with the symmetrical component upon relaxation of the excited state but not appearing at room temperature due to conformational transformations. 相似文献
10.