Abstract

Based on flexible ligands 4,4′-((5-carboxy-1,3-phenylene)bis(oxy))dibenzoic acid (H3cpbda), two flexible N-donor ligands with the similar molecular length, 3-bis(1H-imidazol −1-yl)propane (bip) and 1,3-bis(pyridin-4-yl)propane (bpp), were introduced to assemble MOFs with different metals. Two 2D-MOFs, [Cd1.5(cpbda)(bip)0.5(H2O)]n (1) and [Cu(Hcpbda)(bpp)(H2O)]n (2), were successfully synthesized and characterized by single-crystal X-ray diffraction, power X-ray diffraction, thermal-gravimetric analysis and fluorescence spectroscopy. The different terminal functional groups (imidazole and pyridine) in bip and bpp ligands generate different molecular coordination angels, which show diverse terminal type and bridged type in two 2D structures. The sensing results of 1 on metal cations and anions and magnetic property of 2 were studied. The influences of various N-donor ligands in assembly of flexible MOFs accompany with H3cpbda are also summarized.

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