Photo- and Electronically Switchable Spin-Crossover Iron(II) Metal-Organic Frameworks Based on a Tetrathiafulvalene Ligand.
Hai-Ying WangJing-Yuan GeCarol HuaCheng-Qi JiaoYue WuChanel F LeongDeanna M D'AlessandroTao LiuJing-Lin ZuoPublished in: Angewandte Chemie (International ed. in English) (2017)
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 FeII centers. The materials exhibit redox activity, in addition to thermally and photo-induced spin crossover (SCO). A crystal-to-crystal transformation induced by I2 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.
Keyphrases
- metal organic framework
- transition metal
- room temperature
- density functional theory
- electron transfer
- single molecule
- high glucose
- open label
- diabetic rats
- double blind
- placebo controlled
- molecularly imprinted
- drug induced
- endothelial cells
- oxidative stress
- randomized controlled trial
- signaling pathway
- molecular dynamics
- solid state
- study protocol
- water soluble
- solid phase extraction