Neutron powder diffraction studies of two spin transition Fe II  complexes under pressure | Zendy

Legrand Vincent | Zendy; Le Gac Frédéric | Zendy; Guionneau Philippe | Zendy; Létard JeanFrançois | Zendy

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Neutron powder diffraction studies of two spin transition Fe II complexes under pressure

Author(s) -

Legrand Vincent,

Le Gac Frédéric,

Guionneau Philippe,

Létard JeanFrançois

Publication year - 2008

Publication title -

journal of applied crystallography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.429

H-Index - 162

ISSN - 1600-5767

DOI - 10.1107/s0021889808006481

Subject(s) - spin crossover , neutron diffraction , chemistry , spin transition , powder diffraction , aniline , diffraction , crystallography , ambient pressure , materials science , crystal structure , thermodynamics , organic chemistry , physics , optics

The pressure dependences of the lattice parameters of two spin transition compounds have been derived from neutron powder diffraction measurements at ambient temperature. The study of Fe(PM–AzA) 2 (NCS) 2 [PM is N ‐2′‐pyridylmethylene and AzA is 4‐(phenylazo)aniline] has been used to validate this new type of investigation of spin crossover compounds, and the study of Fe(PM–BiA) 2 (NCS) 2 (BiA is 4‐aminobiphenyl) has allowed the atypical spin crossover behaviour of this compound under pressure to be explained. In addition, this complex exhibits a pressure‐induced structural transition with an associated symmetry change, inducing the transformation of Fe(PM–BiA) 2 (NCS) 2 into a different polymorph that avoids a first‐order spin transition in favour of continuous transition.

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