Artigo Revisado por pares

Comparative study of analytical properties and applications of picolinaldehyde thiosemicarbazone and selenosemicarbazone

1972; Elsevier BV; Volume: 19; Issue: 12 Linguagem: Inglês

10.1016/0039-9140(72)80242-x

ISSN

1873-3573

Autores

José Manuel Cano Pavón, Francisco Augusto Burkert Del Pino,

Tópico(s)

Molecular Sensors and Ion Detection

Resumo

The analytical properties of picolinaldehyde thiosemicarbazone and selenosemicarbazone have been studied, in order to investigate the changes produced when the Se atom is substituted for the S atom. The ionization constants of both substances are very similar. The complexes of picolinaldehyde selenosemicarbazone with cations in aqueous solution are less stable, and the absorption spectra show bathochromic and hypochromic shifts. The introduction of the Se atom offers no advantages in the analytical application of these compounds.

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