Abstract
AbstractThe coordination polymer [Cd(HL)(BPDA)]n·nH2O (1) based on 3‐(5‐(pyridin‐4‐yl)‐1H‐1,2,4‐triazol‐3‐yl)pyridine (HL) and 1,1′‐biphenyl‐4,4′‐dicarboxylic acid (H2BPDA) was hydrothermally synthesized and characterized by single‐crystal X‐ray diffraction, XRPD, IR spectroscopy, and elemental analysis. The asymmetric unit of compound 1 consists of one crystallographically independent CdII ion, one HL ligand, “two half” BPDA2– ligand, and one lattice water molecule. There are two crystallographically different BDPA2– moieties, but each of them is placed in a symmetry element. The BPDA2– ligands and CdII ions connected to2D sheet, and the 2D sheets are connected to a 3D MOF by the HL ligands. Each dimeric CdII unit links six nearest neighbors through the BPDA2– and HL ligands, and the dimeric CdII units are centrosymmetric. Two parallel HL ligands connect two dimeric CdII units, generating long Cd2–HL–Cd2–HL rings, also centrosymmetric. So we can define the dimeric CdII unit as a 6‐connected node. Thus, the 3D structure can be described as a threefold parallel interpenetrated bsn beta‐Sn topology. In addition, the optical properties of compound 1 and the free ligand HL were investigated.
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