Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (10): 3047.doi: 10.7503/cjcu20210233

• Inorganic Chemistry • Previous Articles     Next Articles

Synthesis and Anisotropic Proton Conduction of Porous Organic Salt Single Crystal

LI Hongbin, ZHANG Shuai, LI Zheng, DING Changjiang, BEN Teng()   

  1. College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2021-04-07 Online:2021-10-10 Published:2021-10-10
  • Contact: BEN Teng E-mail:tben@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(91956108);the “111” Project of China(BP0719036);the Science and Technology Foundation of Jilin Province, China(20180414009GH)

Abstract:

Crystalline porous organic salt(CPOS-10) with regular morphology and large size was synthesized by ionic bonding of ciscis-1,3,5-triaminocyclohexane·3HBr and 1,2,4,5-benzenetetracarboxylic acid at room temperature, which had good thermal stability and permanent porosity. Due to the regular morphology and large single crystal size, the anisotropic proton conduction of porous organic salt single crystal was studied for the first time, and the mechanism of anisotropic proton conduction was studied combined with crystal structure. The results showed that CPOS-10 single crystal exhibited an anisotropic proton conductivity, and the concentration of water molecules played an important role in the proton conductivity of CPOS-10. The crystal surface with high concentration of water molecules in the skeleton was easier to form hydrogen bond network with polar groups to promote proton conduction, so the proton conduction through this hydrogen bond network showed higher proton conductivity. Therefore, the non-uniform distribution of water molecules in the framework was the main reason for the anisotropic proton conduction of single crystal. The exploration of the anisotropic proton conductivity for CPOS-10 single crystal is helpful to explore the proton conduction mechanism in porous organic salts.

Key words: Crystalline porous organic salt, Anisotropic proton conductivity, Single crystal, Ionic bond

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