Abstract
To develop high-conductivity solid-state proton-conducting materials is a hot topic in the fuel-cell technology. Herein, p-sulfonatothiacalix[4]arene was chosen as the terminal ligand to construct porous coordination compounds, {[Co4Cl(H2TC4AS)]4(BDC)8}12- (CIAC-240) and {[Co4Cl(H4TC4AS)]4(SIP)8}12- (CIAC-241) (Na4H4TC4AS = tetrasodium p-sulfonatothiacalix[4]arene; H2BDC = isophthalic acid; NaH2SIP = 5-sulfoisophthalic acid sodium salt). Both structures are featured with some window frame-like squares which are constructed by bridging the shuttlecock-like Co4-TC4AS secondary building units (SBUs) with the BDC/SIP ligands and further stacked into the supramolecular extended structures. The proton conduction and vapor adsorption of the compounds were discussed and compared. The experimental results gave the maximum values of 3.22 mS cm−1 and 11.6 mS cm−1 for the proton conductivity of CIAC-240 and CIAC-241, respectively.
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