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Synthesis and Spectroscopic Characterisation of N-Alkyl Quaternary Ammonium Salts Typical Precursors of Cyanines

2002; Multidisciplinary Digital Publishing Institute; Volume: 7; Issue: 3 Linguagem: Inglês

10.3390/70300320

1433-1373

Ana Pardal, Susana S. Ramos, Paulo F. Santos, Lucinda V. Reis, Paulo Almeida,

Porphyrin and Phthalocyanine Chemistry

The synthesis and spectroscopic characterisation of some representative N-alkylsubstituted quaternary ammonium salts derived from benzothiazole, benzoxazole, benzoselenazole, 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.