A metal-organic coordination nanotube based on Co4-TC4A subunits and V-shaped aromatic dicarboxylic acids

The reaction of cobalt chloride with p-tert-butylthiacalix[4]arene (H4TC4A) and 1,3-di(4-carboxyphenyl)benzene (H2DCPB) in solvothermal condition results in a novel calixarene-based compound H{[Co4Cl(TC4A)](DCPB)2}. The compound was characterized by single crystal X-ray diffraction, EDS analysis, TG analysis and IR spectroscopy. The structure was featured with some zigzag chains containing the coordination nanotubular channels, which are constructed by bridging the shuttlecock-like Co4-TC4A secondary building units (SBUs) with the V-shaped DCPB ligands. In order to evaluate the porosity, the N2 sorption measurement was carried out.