Taking advantage of the multi-functional m-FPhH₃IDC ligand, two highly stable Co(II) complexes, namely, [Co(m-FPhH₂IDC)₂ (2,2′-bipy)]·H₂O (1) and [Co(m-FPhH₂IDC)₂ (phen)]·H₂O (2) (m-FPhH₃IDC = 2-(m-fluoro)phenyl-4,5-imidazole dicarboxylic acid, 2,2′-bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline) have been hydrothermally synthesized and structurally characterized. 1 and 2 were found to be stable in aqueous solution having pH values ranging from 1 to 11 as well as boiling water. The results of structural analysis show that abundant hydrogen-bonding networks in 1 and 2 formed by water molecules, carboxyl and imidazole groups exist which are beneficial for the transfer of protons. Therefore, the temperature- and humidity-dependent proton conduction properties of the two complexes were investigated in detail. 1 and 2 have the optimal proton conductivities of 8.15 × 10^-4 S cm^-1 and 1.31 × 10^-5 S cm^-1 at 373 K under 98% RH, respectively, which can be compared to the reported imidazole dicarboxylate-based complexes. In addition, the proton conducting mechanism was studied in detail.

利用多功能的m -FPhH ₃ IDC配体，形成两个高度稳定的Co（II）配合物，即[Co（m -FPhH ₂ IDC）₂（2,2'-bipy）]·H ₂ O（1）和[CO（米-FPhH ₂ IDC）₂（苯）〕·H ₂ O（2）（米-FPhH ₃ IDC = 2-（米-氟）苯基-4,5-咪唑二羧酸，2,2- ′-bipy ＝ 2，2′-联吡啶，phen ＝ 1，10-菲咯啉已被水热合成并在结构上表征。1和2发现在pH值为1至11的水溶液以及沸水中，它们稳定。结构分析结果表明，由水分子，羧基和咪唑基形成的1和2中存在丰富的氢键网络，有利于质子的转移。因此，详细研究了两种配合物的温度和湿度依赖性质子传导性质。1和2的最佳质子电导率分别为8.15×10 ^-4  S cm ^-1和1.31×10 ^-5  S cm ^-1在373 K下，相对湿度为98％时，可以与已报道的基于咪唑二羧酸酯的配合物进行比较。另外，对质子传导机理进行了详细研究。