title: Photo- and Electronically Switchable Spin-Crossover Iron(II) Metal-Organic Frameworks Based on a Tetrathiafulvalene Ligand.
abstract: 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 FeIIcenters. The materials exhibit redox activity, in addition to thermally and photo-induced spin crossover (SCO). A crystal-to-crystal transformation induced by I2doping 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.
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: Hai-Ying
authors.initials: HY
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: Jing-Yuan
authors.initials: JY
authors.lastname: Ge
authors.affiliation: School of Chemistry, The University of Sydney, Sydney, New South Wales, 2006, Australia.
authors.forename: Carol
authors.initials: C
authors.lastname: Hua
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., 116024, Dalian, China.
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Jiao
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.affiliation: School of Chemistry, The University of Sydney, Sydney, New South Wales, 2006, Australia.
authors.forename: Chanel F
authors.initials: CF
authors.lastname: Leong
authors.affiliation: School of Chemistry, The University of Sydney, Sydney, New South Wales, 2006, Australia.
authors.forename: Deanna M
authors.identifier: 0000-0002-1497-2543
authors.initials: DM
authors.lastname: D'Alessandro
authors.affiliation: State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Rd., 116024, Dalian, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: Jing-Lin
authors.identifier: 0000-0003-1219-8926
authors.initials: JL
authors.lastname: Zuo
keywords: iodine; iron; metal-organic frameworks; spin crossover; tetrathiafulvalenes