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Pre‐resonance Raman effect of some croconates in the solid state
Author(s) -
Gonçalves Norberto Sanches,
Shamir Jacob,
Santos Paulo Sergio
Publication year - 1994
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250250906
Subject(s) - raman spectroscopy , chemistry , salt (chemistry) , solid state , thallium , barium , inorganic chemistry , ion , local symmetry , resonance (particle physics) , analytical chemistry (journal) , organic chemistry , optics , physics , particle physics , quantum mechanics
Abstract The optical and Raman spectra of several salts of croconic acid were investigated in order to obtain a better understanding of solid‐state effects. The results indicate that for the sodium and barium salts the perturbations can be ascribed to a decrease in the local symmetry of the anion. On the other hand, for the thallium and silver salts the perturbations are much more dramatic, clearly indicating the presence of charge‐transfer effects. For the silver salt, the abnormal enhancement in the Raman spectrum is ascribed to the presence of silver microparticles in the surface of the solid.