Photoinduced phase transition of the coordinationally unsaturated d9 metal Centers of bis(N,N-diethylethylenediamine)copper(II) perchlorate within the thermal hysteresis of the spin-exchange interaction

Diffraction evidence is presented that the structure of one-dimensional arrays of strained, coordinationally unsaturated d(9) pseudo-Jahn-Teller centers of bis(N,N-diethylethylenediamine)copper(II) perchlorate is affected by excitation of the LMCT bands within the hysteresis region of a low-temperature ferromagnetic-to-antiferromagnetic phase transition. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).