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Light induced excited spin state trapping in the binuclear spin crossover compound [Fe(bpym)(NCS)2]2(bpym) exhibiting a high-spin ground state |
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| Authors: | S. Mouri, N. Ould Moussa, G. Moln r, J.A. Real, A.B. Gaspar, A. Bousseksou,K. Tanaka |
| Affiliation: | aDepartment of Physics, Kyoto University, Kitashirakawa Oiwaketyo, Sakyo-ku, Kyoto 606-8502, Japan bLaboratoire de Chimie de Coordination, CNRS UPR-8241, 205 Route de Narbonne, 31077 Toulouse, France cInstitut de Ciencia Molecular, Universitat de Valencia, Edificio de Institutos de Paterna, P.B. Box 22085, Valencia, Spain |
| Abstract: | A photo-magnetic effect is evidenced using near-infrared light in the binuclear complex [Fe(bpym)(NCS)2]2(bpym). This compound has a 5T2g–5T2g ground state and exhibits no thermal spin crossover – in contrast to the analogous [Fe(bpym)(NCSe)2]2(bpym). The estimated photo-conversion ratio is ca. 30%. By means of magnetic susceptibility measurements as well as Raman and infrared absorption spectroscopies, the nature of the photo-induced phase was established as the 5T2g–1A1g state, which means that only one iron center is converted to low-spin. The photo-induced state was completely converted back to the ground state either by visible light excitation or by heating. |
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