Citation: Hou-Ting LIU, Li DING, Chuan-Cong ZHOU, Hui-Qi ZOU, Jing LU, Su-Na WANG, Yun-Wu LI. Synthesis, structure, and proton conductivity of a Co-MOF based on 3-(3′, 5′-dicarboxyphenyl)-6-carboxylic pyridine[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(4): 596-606. doi: 10.11862/CJIC.2023.027 shu

Synthesis, structure, and proton conductivity of a Co-MOF based on 3-(3′, 5′-dicarboxyphenyl)-6-carboxylic pyridine

Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China

Corresponding author: Hou-Ting LIU, liuhouting@lcu.edu.cn Jing LU, lujing@lcu.edu.cn
Received Date: 20 August 2022
Revised Date: 15 December 2022

Figures(8)

A Co-MOF{[Co₃(L)₂(H₂O)₆]·3H₂O}_n(1) was obtained by hydrothermal reactions of rigid polycarboxylic acid organic ligand H₃L (3-(3', 5'-dicarboxyphenyl)-6-carboxypyridine) and transition metal Co (Ⅱ).The IR spectrum and stability of 1 were characterized.The X-ray single crystal structure analyses showed that ligand L^3- uses its three carboxylate groups and pyridine nitrogen atoms to connect Co (Ⅱ) cations to form a 3D porous framework with lattice water molecules filled in.The coordinated and lattice water molecules are connected by hydrogen bonds to form a continuous 1D water chain.To study the proton conduction behavior of complex 1, it was doped with Nafion to obtain a 1/Nafion composite membrane.The results of AC impedance analyses showed that the doping of complex 1 can increase the proton conductivity of the composite membrane by 40.3% compared with pure Nafion membrane.The studies of the structure-property relationship showed that the continuous hydrogen bond chains and hydrophilic channels in the crystal structure of 1 are the main reasons for its good proton conductivity.
- metal-organic frameworks,
- proton conduction,
- crystal structure,
- hydrothermal synthesis
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