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

Article Article scientifique Article 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 eng 2014 author Chakraborty Pradip 691335 author Enachescu Cristian 543144 author Humair Arnaud 677698 author Egger Leo 676067 author Delgado Perez Maria Teresa 795070 author Tissot Antoine Michel 764186 author Guenee Laure 115015 author Besnard Céline 682138 author Bronisz Robert author Hauser Andreas 111359 17786-17796 10.1039/C4DT01728E 1477-9226 http://xlink.rsc.org/?DOI=C4DT01728E 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 is estimated at x ≈ 0.5. Dewey 540 38 Département de chimie physique 142 false 687 Groupe Hauser Dalton transactions 43 47 e6b5dc18-4ee8-41a7-9409-0c1b32e9e0f5 Article (Published version) Restricted ref01424.pdf 5277401 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie physique

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Light-induced spin-state switching in the mixed crystal series of the 2D coordination network {[Zn_1−xFe_x(bbtr)₃](BF₄)₂}_∞: optical spectroscopy and cooperative effects	Dalton transactions			2014	855	1

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