Remarkable scan rate dependence for a highly constrained dinuclear iron(II) spin crossover complex with a wide thermal hysteresis loop

Rafal Kulmaczewski; Juan Olguín; Jonathan A Kitchen; Humphrey L C Feltham; Guy N L Jameson; Jeffery L Tallon; Sally Brooker

doi:10.1021/ja411563x

Remarkable scan rate dependence for a highly constrained dinuclear iron(II) spin crossover complex with a wide thermal hysteresis loop

J Am Chem Soc. 2014 Jan 22;136(3):878-81. doi: 10.1021/ja411563x. Epub 2014 Jan 8.

Authors

Rafal Kulmaczewski¹, Juan Olguín, Jonathan A Kitchen, Humphrey L C Feltham, Guy N L Jameson, Jeffery L Tallon, Sally Brooker

Affiliation

¹ Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago , P.O. Box 56, Dunedin 9054, New Zealand.

PMID: 24400714
DOI: 10.1021/ja411563x

Abstract

The abrupt [HS-HS] ↔ localized [HS-LS] spin crossovers of a new triazole-based diiron(II) complex result in a record-equaling thermal hysteresis loop width for a dinuclear complex (ΔT = 22 K by SQUID magnetometer in "settle" mode) and show a remarkable scan rate dependence of only the cooling branch, as revealed by detailed magnetic, DSC, and Mössbauer studies.