Spin‐Crossover Complexes

EurJIC is proud to present a bumper issue on Spin-Crossover Complexes. Our Guest Editors, Keith Murray, Hiroki Oshio and Jose Antonio Real, have worked hard to put together a fantastic issue. With a valuable personal account of the field by Philipp Gutlich and inspiring papers by leading experts, you will not be disappointed.

Strong Field Iron(II) Complex Converted by Light into a Long-Lived High-Spin State

Stark-Feld-Eisen(II)-Komplex konvertiert durch Licht in einen langlebigen High-Spin-Zustand

High-spin wheel of a heptanuclear mixed-valent Fe(II,III) complex.

Electronic Relaxation Phenomena Following 57Co(EC)57Fe Nuclear Decay in [MnII(terpy)2](ClO4)2·1/2H2O and in the Spin Crossover Complexes [CoII(terpy)2]X2·nH2O (X = Cl and ClO4):  A Mössbauer Emission Spectroscopic Study

The valence states of the nucleogenic 57Fe arising from the nuclear disintegration of radioactive 57Co by electron capture decay, 57Co(EC)57Fe, have been studied by Mossbauer emission spectroscopy (MES) in the 57Co-labeled systems:  [57Co/Co(terpy)2]Cl2·5H2O (1), [57Co/Co(terpy)2](ClO4)2·1/2H2O (2), and [57Co/Mn(terpy)2](ClO4)2· 1/2H2O (3) (terpy = 2,2‘:6‘,2‘ ‘-terpyridine). The compounds 1, 2, and 3 were labeled with ca. 1 mCi of 57Co and were used as the Mossbauer sources at variable temperatures between 300 K and ca. 4 K. [Fe(terpy)2]X2 is a diamagnetic low-spin (LS) complex, independent of the nature of the anion X, while [Co(terpy)2]X2 complexes show gradual spin transition as the temp…