0000000001299653
AUTHOR
Bohdan O. Golub
High temperature spin crossover in [Fe(pyrazine){Ag(CN) 2 } 2 ] and its solvate
A high temperature spin crossover (Tup = 367 K) was detected in a metal–organic framework [Fe(pz){Ag(CN)2}2]·MeCN (pz = pyrazine). Upon heating, this solvate released acetonitrile guest molecules, which slightly shifted the transition temperature of the complex (Tup = 370 K and Tdown = 356 K).
Cooperative High-Temperature Spin Crossover Accompanied by a Highly Anisotropic Structural Distortion
Spin transitions are a spectacular example of molecular switching that can provoke extreme electronic and structural reorganizations in coordination compounds. A new 3D cyanoheterometallic framework, [Fe(pz)(Au(CN)2)2], has been synthesized in which a highly cooperative spin crossover has been observed at 367 and 349 K in heating and cooling modes, respectively. Mössbauer spectroscopy revealed a complete transition between the diamagnetic and paramagnetic states of the iron centres. The low-spin-to-high-spin transition induced a drastic structural distortion involving a large one-directional expansion (ca. 10.6%) and contraction (ca. 9.6%) of the lattice. Negative thermal expansion along th…
CCDC 1422402: Experimental Crystal Structure Determination
Related Article: Il'ya A. Gural'skiy, Bohdan O. Golub, Sergii I. Shylin, Vadim Ksenofontov, Helena J. Shepherd, Paul R. Raithby, Wolfgang Tremel and Igor O. Fritsky|2016|Eur.J.Inorg.Chem.||3191|doi:10.1002/ejic.201600406
CCDC 1422398: Experimental Crystal Structure Determination
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CCDC 1422396: Experimental Crystal Structure Determination
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CCDC 1422397: Experimental Crystal Structure Determination
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CCDC 1422405: Experimental Crystal Structure Determination
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CCDC 1422399: Experimental Crystal Structure Determination
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CCDC 1422403: Experimental Crystal Structure Determination
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CCDC 1478973: Experimental Crystal Structure Determination
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CCDC 1422404: Experimental Crystal Structure Determination
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CCDC 1422400: Experimental Crystal Structure Determination
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CCDC 1422401: Experimental Crystal Structure Determination
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