INVESTIGADORES
PIRO Oscar Enrique
artículos
Título:
Polarized Infrared Absorption Spectra of Na2[Fe(CN)5NO].2H2O with Part of the Anions in the Electronically Excited Metastable State
Autor/es:
J. A. GÜIDA; O. E. PIRO; P. J. AYMONINO
Revista:
SOLID STATE COMMUNICATIONS
Editorial:
Pergamon Press
Referencias:
Año: 1986 vol. 57 p. 175 - 178
ISSN:
0038-1098
Resumen:
IR spectra of the nitroprusside ion in Na2[Fe(CN)5NO].2H2O in the metastable electronic state produced by irradiation at bo11ing air temperature with the 514.5 nm line of an Ar+ laser were obtained for thin (100) single crystal plates in the ranges 4000-430 cm^-I and 4000-550 cm^-1 for polarizations along the b and c-axes, respectively. The spectra showed that the suggested bending of the FeNO group upon excitation occurs in the (a,b) mirror plane of the ground state crystal. In addition to bands corresponding to Raman lines reported as due to excited nitroprusside, new bands appeared in the infrared spectra. Some of them showed a strong dichroic behavior. On heating the samples some of the new bands disappeared earlier than the bands corresponding to the Raman lines. No explanation is still available for those bands.
