title: Assembly of three coordination polymers based on a sulfonic-carboxylic ligand showing high proton conductivity.
abstract: Three new coordination polymers (CPs)/metal-organic frameworks (MOFs) with different structures have been synthesized using 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid (H4L) and metal ions, Cu(2+), Ca(2+) and Cd(2+). The Cu compound features a one-dimensional chain structure, further extending into a 2D layer network through H-bond interactions. Both the Ca and Cd compounds show 3D frameworks with (4,4)-connected PtS-type topology and (3,6)-connected bct-type topology, respectively. These CPs/MOFs all exhibit proton conduction behavior, especially for the Cu compound with a proton conductivity of 3.46 × 10(-3) S cm(-1) at 368 K and 95% relative humidity (RH). Additionally, the activation energy (Ea) has also been investigated to deeply understand the proton-conduction mechanism.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, P.R. China. songsy@ciac.ac.cn cwang@ciac.ac.cn.
authors.forename: Shu-Na
authors.initials: SN
authors.lastname: Zhao
authors.forename: Xue-Zhi
authors.initials: XZ
authors.lastname: Song
authors.forename: Min
authors.initials: M
authors.lastname: Zhu
authors.forename: Xing
authors.initials: X
authors.lastname: Meng
authors.forename: Lan-Lan
authors.initials: LL
authors.lastname: Wu
authors.forename: Shu-Yan
authors.initials: SY
authors.lastname: Song
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Zhang
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry; D018360:Crystallography, X-Ray; D004553:Electric Conductivity; D008024:Ligands; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011522:Protons; D013450:Sulfones / Q000737:chemistry*
chemical_list: D002264:Carboxylic Acids; D008024:Ligands; D009942:Organometallic Compounds; D011108:Polymers; D011522:Protons; D013450:Sulfones