Abstract
Four 3D coordination compounds, named [Cd3(nbta)2(bix)2(H2O)2]¡H2O (1), Zn3(nbta)2(biim)3 (2), Zn6(nbta)4(btd)5 (3) and [Co3(nbta)2(bid)(H2O)8]¡4H2O (4) (bix=1,4-bis(imidazole-1-ylmethyl)benzene, biim=1,1â˛-(1,4-butanediyl)bis(imidazole), btd=1,10-bis(1,2,4-triazol-1-yl)decane, bid=1,10-bis(imidazole-1-yl)decane), and H3nbta=5-nitro-1,2,3-benzenetricarboxylic acid), have been synthesized by solvothermal methods and structurally characterized by X-ray diffraction studies. In compound 1, every nbta3- anion connects four CdII ions to give a 2D layer, and the layers are pillared by bix ligands to generate a 3D framework with a Schläfli symbol of (3¡4¡63¡7)(4¡64¡8)(43¡63)(34¡42¡66¡76¡88¡92). For compound 2, every nbta3- anion connects three ZnII ions to give a 2D layer structure, the 2D layers are further connected into a facinating 3D framework by biim ligands with (3,4)-connected (3¡6¡7)(3¡5¡62¡7¡8)(3¡52¡6¡8¡9)(5¡6¡8¡10¡112) topology. In compound 3, the nbta3- anions are connected by ZnII ions to generate a 2D layer, and the layers are bridged by btd ligands to build a fascinating 3D framework with (4¡6¡7¡8¡92)(4¡6¡8¡92¡10)(4¡93¡102)(4¡6¡8¡9¡102)(4¡6¡7¡8¡9¡10)(4¡6¡7¡8¡102)(42¡6¡7¡8¡9) topology. In compound 4, the nbta3- aions are connected by CoII ions into a 2D layer, the 2D layers are linked by bid ligands to generate a 3D 103 topological framework. Furthermore, the IR spectra, TGA, PXRD, elemental analyses, the solid-state luminescence of compounds 1â3 have been studied.
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