期刊
JOURNAL OF APPLIED CRYSTALLOGRAPHY
卷 40, 期 -, 页码 158-164出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S002188980605028X
关键词
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The photocrystallographic investigation of the light-induced excited spin-state trapping effect in the dinuclear spin-crossover compound {[Fe(bt)(NCS)(2)](2)(bpym)} is reported. In this system, each of the two Fe sites may be either in the high-spin (HS) or in the low-spin (LS) state, so that the molecule corresponds to a three-state system (LS-LS, HS-LS and HS-HS). At low temperature, the laser excitation wavelength controls the photoswitching from the stable LS-LS state to one of the metastable excited states (HS-LS or HS-HS), and also between these two excited states. Significant changes in the crystalline structure associated with the photoinduced change of spin state are detailed here. The low-temperature photoinduced states look similar to the corresponding states observed at thermal equilibrium within the unit-cell thermal contraction.
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