Development of porous magnets with electron donor/acceptor metal–organic frameworks

目前，分子磁体的自发磁化控制主要是通过光照射、溶剂调节或电化学方法来实现的。在这里，我们首次证明了CO2可以吸附在电子态柔性层状化合物[{Ru2(2,4- f2phco2)4}2TCNQ(OEt)2](1)中产生长程磁序。化合物1对CO2的吸附伴随着TCNQ(OEt)2弯曲偏转的结构转变，在控制电子态方面起着极其重要的作用。由于CO2吸附/解吸过程中电子态的可逆变化，磁性相在反铁磁性相（CO2吸附相）和顺磁性相（CO2无吸附相）之间切换。

Nowadays, the control of spontaneous magnetization in the molecular magnets has been mainly actualized by photo-irradiation, solvent accommodation, or electrochemical approach. Here, we demonstrate for the first time CO2 can be adsorbed to generate the long-range magnetic order in an electronic-state-flexible layered compound, [{Ru2(2,4-F2PhCO2)4}2TCNQ(OEt)2] (1). The adsorption of CO2 into compound 1 is accompanied by a structural transformation with the bending deflection of TCNQ(OEt)2, which plays an extremely important role in controlling the electronic states. Owing to the reversible change of electronic states by the CO2 adsorption/desorption processes, magnetic phase is switched between antiferromagnetic phase (CO2-adsorbed phase) and paramagnetic phase (CO2-free phase).