Cooperative spin transition in a mononuclear manganese(III) complex

Paulo N Martinho; Brendan Gildea; Michelle M Harris; Tibebe Lemma; Anil D Naik; Helge Müller-Bunz; Tia E Keyes; Yann Garcia; Grace G Morgan

doi:10.1002/anie.201205573

Cooperative spin transition in a mononuclear manganese(III) complex

Angew Chem Int Ed Engl. 2012 Dec 7;51(50):12597-601. doi: 10.1002/anie.201205573. Epub 2012 Nov 5.

Authors

Paulo N Martinho¹, Brendan Gildea, Michelle M Harris, Tibebe Lemma, Anil D Naik, Helge Müller-Bunz, Tia E Keyes, Yann Garcia, Grace G Morgan

Affiliation

¹ School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.

PMID: 23129209
DOI: 10.1002/anie.201205573

Abstract

Mind the gap: A complete, cooperative spin transition for a mononuclear Mn(III) complex is reported with an 8 K hysteresis window. Raman spectra collected at a single temperature in warming and cooling modes confirm the electronic bistability within the hysteresis loop. The source of the cooperativity is a disconnection in the hydrogen-bonded 1D chains that connect adjacent cations owing to an order-disorder transition in the PF(6)(-) counterion.