1742-91-2Relevant articles and documents
A comparative study of symmetrical and unsymmetrical trimethine cyanine dyes bearing benzoxazolyl and benzothiazolyl groups
Shi, Quan-Quan,Sun, Ru,Ge, Jian-Feng,Xu, Qing-Feng,Li, Na-Jun,Lu, Jian-Mei
experimental part, p. 1506 - 1511 (2012/03/11)
Six symmetrical and unsymmetrical trimethine cyanine dyes bearing benzothiazolyl and benzoxazolyl groups were synthesized. Their linear optical properties were studied. It was found that the variation of hetero atoms play an important role in the spectral properties of the dyes. Sequential replacement of the oxygen atom by the sulfur atom resulted in a change in shade from yellow to purple. In order to understand the relationship between the molecular structures and the spectral properties of these dyes, theoretical calculations were made using the Gaussian programme. Key parameters related to absorption and emission spectra were reported and discussed.
Carbenoid reactions of trifluoromethylelement compounds. Part 4. Reactions of trifluoromethylzinc bromide with enamines and methylene bases
Tyrra, Wieland,Naumann, Dieter,Pasenok, Sergej V.,Yagupolskii, Yurii L.
, p. 181 - 186 (2007/10/02)
The reactions of ZnBr(CF3)*2CH3CN with 1-morpholinocyclo-pentene and -hexene have been investigated and found to yield mixtures of two isomers of 1-morpholino-1-cyanomethyl-2-difluoromethyl-cyclopentane and -hexane, respectively.The interaction with methylene bases of nitrogen heterocycles leads to the formation of trimethinecyanine dyes.This reaction sequence includes the formation of two carbon-carbon bonds in a one-pot operation.The mechanism of the reaction is discussed. - Keywords: Carbenoid reactions; Trifluoromethylelement compounds; Trifluoromethylzinc bromide; Enamines; Methylene bases; NMR spectroscopy; Mass spectrometry; UV-vis spectroscopy