Tuning the Spin‐Crossover Behaviour of a Hydrogen‐Accepting Porous Coordination Polymer by Hydrogen‐Donating Guests |
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Authors: | Jin‐Yan Li Yan‐Cong Chen Ze‐Min Zhang Wei Liu Dr Zhao‐Ping Ni Prof Ming‐Liang Tong |
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Institution: | Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P.R. China) |
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Abstract: | A Hoffman‐like coordination polymer with appreciable porosity and uncoordinated pyridyl groups, namely, Fe(2,5‐bpp){Au(CN)2}2] ? x Solv (2,5‐bpp=2,5‐bis(pyrid‐4‐yl)pyridine; Solv=solvent), was synthesised and characterised. A series of fascinating spin‐crossover behaviours with abrupt, stepwise and hysteretic features were obtained by exchange with a range of protic solvents (ethanol, n‐propanol, isopropyl alcohol, sec‐butanol and isobutanol). Guest–host hydrogen‐bonding interactions involving the H‐accepting site of the framework are primarily responsible for the pronounced cooperativity of these spin‐crossover behaviours. Meanwhile, the tunable critical temperatures over a range of about 130 K are presumably attributable to a certain degree of competition between internal pressure and local electronic influences of solvents. |
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Keywords: | coordination polymers host– guest systems iron magnetic properties spin crossover |
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