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Dual-ligand strategy was used to synthesize three new coordination polymers with the formula as [Cd(HL(3) (H 3 L = biphenyl-3,4',5-tricarboxylic acid, 2,2'-bipy = 2, 2'-bipyridine, bib = 1,4-bis(imidazol-1-yl)butane), which were further structurally characterized by single crystal X-ray diffraction analyses. Compound 1 features a 1D infinite chain structure and π…π interactions between adjacent 1D chains gives rise to a 2D layer and further OÀ H…O hydrogen bonding interactions between adjacent 2D layers affords a 3D supramolecular framework.Compound 2 shows a 3D framework with unprecedented (3,4)connected topology. Compound 3 features a 2D!3D interdigitated supramolecular framework based on 2D hydrogenbonding layers that constructed from 1D infinite chain and interchain OÀ H…O hydrogen bonding interactions. Luminescence investigations revealed that compound 1 shows interesting tunable luminescence via altering the excitation wavelength, and compound 2-3 show intense unimodal emission luminescence at room temperature.

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A new heterometallic metal-organic framework, namely [Zn 2 Sr-(btc) 2 (H 2 O) 3 ] n • x(solvent) (1 btc = 1,3,5-benzenetricarboxylate), has been solvothermally synthesized and structurally characterized. X-ray structural analysis reveals that compound 1 exploits heterometallic trinuclear [Zn 2 Sr(COO) 6 ] clusters as secondary building subunits, and displays a 3D framework with 1D channels along crystallographical c axis that can be simplified into a binodal (3,6)-connected topological network. The activated sample of 1 a shows high CO 2 adsorption capacity and high adsorption selectivity of CO 2 over N 2 at 298 K. Luminescent properties investigations indicate that 1 a can sensitively sensing of CS 2 via luminescence quenching.

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