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Irreversible Magnetic Behaviour Caused by the Thermosalient Phenomenon in an Iron(III) Spin Crossover Complex
Author(s) -
Martins Frederico F.,
Joseph Abhinav,
Diogo Hermínio P.,
Minas da Piedade Manuel E.,
Ferreira Liliana P.,
Carvalho Maria Deus,
Barroso Sónia,
Romão Maria João,
Calhorda Maria José,
Martinho Paulo N.
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800605
Subject(s) - spin crossover , chemistry , differential scanning calorimetry , hysteresis , condensed matter physics , spin transition , magnetic hysteresis , phase transition , crystallography , magnetization , magnetic field , thermodynamics , physics , quantum mechanics
The new iron(III) complex [Fe(5‐I‐salEen) 2 ]ClO 4 exhibits both spin crossover, with hysteresis, between 304 K and 320 K (16 K hysteresis loop), and thermosalient phenomena. After a symmetry‐breaking phase transition between 120 and 130 K, confirmed by single‐crystal X‐ray diffraction, and the fragmentation of the crystals around 312 K, confirmed by differential scanning calorimetry and hot stage microscopy, the hysteresis loop disappears. This is the first example where the explicitly reported thermosalient effect modifies the magnetic properties of a given spin crossover crystal.