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Photo‐ and Electronically Switchable Spin‐Crossover Iron(II) Metal–Organic Frameworks Based on a Tetrathiafulvalene Ligand
Author(s) -
Wang HaiYing,
Ge JingYuan,
Hua Carol,
Jiao ChengQi,
Wu Yue,
Leong Chanel F.,
D'Alessandro Deanna M.,
Liu Tao,
Zuo JingLin
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201611824
Subject(s) - tetrathiafulvalene , spin crossover , redox , ligand (biochemistry) , materials science , metal organic framework , spin states , doping , oxidation state , coordination polymer , metal , conductivity , crystal (programming language) , crystal structure , chemistry , crystallography , inorganic chemistry , optoelectronics , molecule , organic chemistry , biochemistry , receptor , adsorption , metallurgy , programming language , computer science
A major challenge is the development of multifunctional metal–organic frameworks (MOFs), wherein magnetic and electronic functionality can be controlled simultaneously. Herein, we rationally construct two 3D MOFs by introducing the redox active ligand tetra(4‐pyridyl)tetrathiafulvalene (TTF(py) 4 ) and spin‐crossover Fe II centers. The materials exhibit redox activity, in addition to thermally and photo‐induced spin crossover (SCO). A crystal‐to‐crystal transformation induced by I 2 doping has also been observed and the resulting intercalated structure determined. The conductivity could be significantly enhanced (up to 3 orders of magnitude) by modulating the electronic state of the framework via oxidative doping; SCO behavior was also modified and the photo‐magnetic behavior was switched off. This work provides a new strategy to tune the spin state and conductivity of framework materials through guest‐induced redox‐state switching.