High proton conductivity in metalloring-cluster based metal-organic nanotubes
metal-organic nanotubes, macrocyclic, metalloring cluster, inner-surface functionalization, proton-conductivity
Two novel anionic single-walled metal-organic nanotubes (MONTs), [(CH3)2NH2][In(cdc)(thb)]·2DMF·9.5H2O (FJU-105) and [(CH3)2NH2][In(cdc)(H-btc)]·2DMA·11H2O (FJU-106) (H2cdc = 9H-carbazole-3,6-dicarboxylic acid, H2thb = 2,5-thiophene dicarboxylic acid, H3btc = 1,3,5-benzene tricarboxylic acid), are achieved by employing [In6(cdc)6]6+ metalloring cluster with largest diameter as the secondary building blocks (SBUs). The inner surface of FJU-106 is functionalized by uncoordinated -COOH groups of the H-btc linkers, leading to a higher proton conduction than FJU-105. At 70 °C, FJU-106 displays the proton conduction performances among MONTs, up to 1.80 × 10-2 S·cm-1. And FJU-105 and FJU-106 are the first examples of MONT proton conductors operating at subzero temperature.
Tsinghua University Press
Quanjie Lin, Yingxiang Ye, Lizhen Liu, Zizhu Yao, Ziyin Li, Lihua Wang, Chulong Liu, Zhangjing Zhang, Shengchang Xiang. High proton conductivity in metalloring-cluster based metal-organic nanotubes. Nano Research 2021, 14(2): 387-391.