Proton conducting behavior of a microporous metal-organic framework assisted by ligand isomerization
作者:Houting Liu、Jing Lu、Zhiliang Liu、Suna Wang、Hui Yan、Haiquan Tian
DOI:10.1016/j.jssc.2020.121570
日期:2020.10
hydrogen bonds between the guest water molecules and host framework has been obtained. The CV and AC impendence studies suggested there was remarkable proton conducting behavior within Tm-MOF crystals, which was influenced by external voltage. The proton conducting mechanism was explored through dynamic simulation calculation. It was suggested that proton transferred between L ligand and water molecules through
微孔Tm-MOF [Tm 2 L 2(ox)(H 2 O)2 ]·4H 2 O} n(Tm-MOF,L = 2-(吡啶-4-基)-2H-咪唑-4,5-二羧酸二阴离子; ox =草酸二阴离子)在客体水分子和主体骨架之间具有氢键获得。CV和AC阻抗研究表明,Tm-MOF晶体内部存在显着的质子传导行为,这受外部电压的影响。通过动态模拟计算探索了质子传导机理。暗示质子通过氢键在L配体和水分子之间转移。并且L配体可以异构化为外部电压激发的激发态,这是必不可少的,并确保了质子转移的连续性。通过在0V vs.与Ag-AgCl。较高电压下的紫外吸收峰红移和Ea值低于0.4eV的0.22eV也证实了动态仿真的结果。