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Spin State in (Porphinato)iron(III) Complex. A Spin‐Crossover Complex with Two Magnetically Distinct Sites
Author(s) -
Dong TengYuan,
Cheng ChingHung,
Chang LingShao,
Wang Yu
Publication year - 1999
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199900001
Subject(s) - chemistry , spin crossover , spin (aerodynamics) , spin states , quadrupole splitting , mössbauer spectroscopy , quadrupole , condensed matter physics , spin transition , nuclear magnetic resonance , atomic physics , crystallography , inorganic chemistry , physics , thermodynamics
Abstract The results of low temperature X‐ray determination, Mössbauer and magnetic measurement of spin‐crossover (isothiocyanato)(porphinato)iron(III) hemipyridine are reported. The features in 77 K Mössbauer spectrum include two doublets, one with a quadrupole splitting (ΔE Q ) of 1.961 mm s −1 (low‐spin site) and the other with ΔE Q = 0.792 mm s −1 (high‐spin site). As the temperature of the sample is increased to 300 K, the signal intensity of the high‐spin site grows to 92% at the expense of the low‐spin signal. The variable‐temperature magnetic susceptibility data also support that the tetraphenyl complex is a spin‐crossover complex.