2870-37-3Relevant academic research and scientific papers
Synthesis and spectroscopic characterisation of N-alkyl quaternary ammonium salts typical precursors of cyanines
Pardal,Ramos,Santos,Reis,Almeida
, p. 320 - 330 (2002)
The synthesis and spectroscopic characterisation of some representative N-alkyl-substituted quaternary ammonium salts derived from benzothiazole, benzoxazole, benzo-selenazole, indole and quinoline are described. These heterocyclic salts, bearing an activated methyl group in the 2-position in relation to the nitrogen atom and N-methyl, -pentyl, -hexyl and -decyl chains, are typical precursors of cyanine dyes.
Symmetric Meso-Chloro-Substituted Pentamethine Cyanine Dyes Containing Benzothiazolyl/Benzoselenazolyl Chromophores Novel Synthetic Approach and Studies on Photophysical Properties upon Interaction with bio-Objects
Kurutos, Atanas,Ryzhova, Olga,Trusova, Valeriya,Gorbenko, Galyna,Gadjev, Nikolay,Deligeorgiev, Todor
, p. 177 - 187 (2016/01/15)
A series of symmetric pentamethine cyanine dyes derived from various N-substituted benzothiazolium/benzoselenazolium salts, and a conjugated bis-aniline derivative containing a chlorine atom at meso-position with respect to the polymethine chain, were synthesized using a novel improved synthetic approach under mild conditions at room temperature. The reaction procedure was held by grinding the starting compounds for relative short times. The novel method is reliable and highly reproducible. Some photophysical characteristics were recorded in various solvents, including absorption, and fluorescence quantum yields using Cy-5 as a reference. Additional studies on interactions with several bio-objects such as liposomes, DNA, and proteins have been investigated in the present work.
Delocalized cationic azo dyes containing a thiazole moiety
Salvador, Maria A.,Reis, Lucinda V.,Almeida, Paulo,Santos, Paulo F.
, p. 299 - 303 (2008/09/16)
Several new delocalized cationic azo dyes incorporating a bathochromic thiazole moiety have been prepared in moderate to good yields. The synthesis involved the Knoevenagel condensation of an intermediate azo compound, bearing a terminal formyl group, with methylenic bases generated in situ from benzoazolium and quinolinium salts. All dyes display strong absorption around 700 nm and have shown negative solvatochromic behaviour.
