Syntheses, Structures, and Properties of Three Coordination Polymers: [Cd2(bpp)1.5(Hbpp)(phen)2]n, [Mn3(Htptc)2(phen)2(H2O)2]n, and {[Cu(btc)0.5(1,4-bib)]•2H2O}n

Hydrothermal reactions of three aromatic polycarboxylic acids and the transitional metal cations in the presence of phen and 1,4-bib afford three new coordination polymers: [Cd-2(bpp)(1.5)(Hbpp)(Phen)(2)](n) (1), [Mn-3(Htptc)(2)(Phen)(2)(H2O)(2)](n) (2), and {[Cu(btc)(0.5)(1,4-bib)]center dot 2H(2)O}(n) (3) (H(2)bpp = 2,6-bis(4'-carboxyphenyl)-4-phenylpyridine, H(4)tptc = terphenyl-2,5,2',5'-tetracarboxylic acid, H(4)btc = biphenyl-2,2',4,4'-tetracarboxylic acid, phen = 1,10-phenanthroline, and 1,4-bib = 1,4-bis(1H-imidazol-1-yl)benzene). Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, and powder X-ray diffraction (PXRD) analyses. In compound 1, the Cd-II cations are linked by bpp(2-) to form one ladder structure, based on which a 3D network is constructed with the help of non-covalent interactions. The topology of 2 is a 3D (3,4,5)-connected framework with the Point Schlafli symbol of (4(2).6)(2)(4(3).6(2).8)(4(5).6(4).8)(2). Compound 3 shows an unprecedented 3D (4,4)-connected framework with the Point Schlafli symbol of (6(4).8(2))(2)(6(5).8). Moreover, the luminescent property of 1 has been investigated.