Browsing by Author "Santos, P. F."
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- Síndrome de Eagle: apresentação de um caso clínicoPublication . Furão, S.; Santos, P. F.; Silva, C.; Santos, C.; Teles, I.; Delgado, A.
- Synthesis and spectroscopic characterisation of n-alkyl quaternary ammonium salts typical precursors of cyaninesPublication . Pardal, Ana Cristina; Ramos, S.S.; Santos, P. F.; Reis, L. V.; Almeida, P.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.