Electronic and structural evolution of pentacyanonitrosylmetallates during thermal decomposition

D.B.SORIA; M.A.TAYLOR; M.CEOLÍN

Campinas, Brasil

Workshop; XIX, Reunión Anual de Usuarios, RAU; 2009

Several studies including the crystallographic, thermal and vibrational properties of a series of hydrated and anhydrous alkaline and alkaline-earth pentacyanonitrosylferrate, [Fe(CN)5NO]2- , have been previously performed (1-3 and references therein). These  studies provided interesting results, specially about the vibrational and photophysiced NO behaviour. However their structural and electronic  changes induced during thermal degradation is not well known. In view of finding above referred to the nitroprusside anion and their salts and to obtain information in other pentacyanonitrosylmetallates, our main purpose is to extend the study to their alkaline and transitions metals salts. In this work, we present a systematic and extensive investigation of the thermal decomposition of the different complexes with general formula  Am[B(CN)5NO]n  with A= K(I), Co(II), B= Fe, Cr, Mn,  m=1,3 and n= 1,2 using EXAFS, XANES, XRD, DSC, TGA and FTIR.