Open AccessPolymeric spin transition compounds: EXAFS and thermal behaviour
Author(s) -
Michalowicz A.,
Moscovici J.,
Garcia Y.,
Kahn O.
Publication year - 1999
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s090904959900093x
Subject(s) - extended x ray absorption fine structure , thermal , spin (aerodynamics) , spin crossover , materials science , transition metal , chemical physics , chemistry , crystallography , chemical engineering , physics , thermodynamics , organic chemistry , absorption spectroscopy , optics , catalysis , engineering
The structures of large thermal hysteresis Fe(II) polymeric spin transition compounds have been studied by EXAFS. The asumption that a peak at 7 A can be assigned to a multiple scattering double metal-metal distance in an aligned polymeric structure is con_fumed. For the first time, such an aligned structure was observed on High Spin (HS) compound of the family. A qualitative study of the thermal variation of this multiple scattering peak was performed. The correlation between this thermal behaviour, due to variations in the vibrational entropy, and the electronic structure of the metallic ions is discussed.