title: Three orders of magnitude enhancement of proton conductivity of porous coordination polymers by incorporating ion-pairs into a framework.
abstract: A clathrate NH4Br@HKUST-1 has been prepared by means of soaking the metal-organic-framework, HKUST-1, in ammonium bromide saturated ethanol solution at ambient temperature. Both NH4Br@HKUST-1 and HKUST-1 show the same framework structure. The formula of the clathrate is approximately expressed as Cu3(BTC)2(NH4Br)1.15. The thermal stability of the metal-organic framework is not affected by incorporating ammonium bromide into its pores. The impedance spectra measurements were performed for both NH4Br@HKUST-1 and HKUST-1 in anhydrous and selected relative humidity environments, disclosing that the conductivity of NH4Br@HKUST-1 is enhanced by three/four orders of magnitude under the same conditions with respect to HKUST-1. This study provided an efficient strategy to achieve new high conductivity proton transport materials.
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, P. R. China. xmren@njtech.edu.cn and College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Ya-Wen
authors.initials: YW
authors.lastname: You
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, P. R. China. xmren@njtech.edu.cn and College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Chen
authors.initials: C
authors.lastname: Xue
authors.affiliation: Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, P. R. China.
authors.forename: Zheng-Fang
authors.initials: ZF
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, P. R. China. xmren@njtech.edu.cn and College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, P. R. China.
authors.forename: Shao-Xian
authors.initials: SX
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, P. R. China. xmren@njtech.edu.cn and College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, P. R. China and Coordination Chemistry Institute & State Key Laboratory, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Ren