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Issue 47, 2014
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Light-induced spin-state switching in the mixed crystal series of the 2D coordination network {[Zn1−xFex(bbtr)3](BF4)2}: optical spectroscopy and cooperative effects

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Abstract

Depending on the iron(II) concentration, the mixed crystals of {[Zn1−xFex(bbtr)3](BF4)2}, bbtr = 1,4-di(1,2,3-triazol-1-yl)butane, 0.01 ≤ x ≤ 1, show macroscopic light-induced bistability between the high-spin and the low-spin state. In the highly diluted system with x = 0.01 and up to x = 0.31, the photoinduced low-spin state always relaxes back to the high-spin state independent of the initial light-induced low-spin fraction. In the highly concentrated mixed crystals with x = 0.67, 0.87 and 1, the strong cooperative effects coupled to a crystallographic phase transition result in light-induced bistability with decreasing critical light-induced low-spin fraction and increasing hysteresis width for increasing iron(II) concentrations. The lower limit for the light-induced bistability was estimated to be x ≈ 0.5.

Graphical abstract: Light-induced spin-state switching in the mixed crystal series of the 2D coordination network {[Zn1−xFex(bbtr)3](BF4)2}∞: optical spectroscopy and cooperative effects

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Publication details

The article was received on 10 Jun 2014, accepted on 17 Jul 2014 and first published on 17 Jul 2014


Article type: Paper
DOI: 10.1039/C4DT01728E
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Dalton Trans., 2014,43, 17786-17796

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    Light-induced spin-state switching in the mixed crystal series of the 2D coordination network {[Zn1−xFex(bbtr)3](BF4)2}: optical spectroscopy and cooperative effects

    P. Chakraborty, C. Enachescu, A. Humair, L. Egger, T. Delgado, A. Tissot, L. Guénée, C. Besnard, R. Bronisz and A. Hauser, Dalton Trans., 2014, 43, 17786
    DOI: 10.1039/C4DT01728E

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