Two highly connected frameworks and one polythreading architecture based on multidentate N-donor ligands: Syntheses, structures, characterizations and photoluminescent properties

摘要

Three coordination polymers based on multidentate N-donor ligands and polycarboxylate anions, namely, [Co3(4,4'-tmbpt)4(btc)2]·9.5H2O (1), [Ag4(4,4'-tmbpt)(btec)(H2O)2]·H2O (2) and [Zn(4,4'-tmbpt)(btec)_(0.5)(H2O)]·0.5H2O (3) (4,4'-tmbpt = 1-((1H-1,2,4-triazol-1-yl)methyl)-3,5-bis(4-pyridyl)-1,2,4-triazole, Hsbtc = 1,3,5-benzenetricarboxylic acid, and H4btec = 1,2,4,5-benzenetetracarboxylic acid) have been prepared under hydrothermal condition. Compound 1 displays a 3D (3,6,8)-connected framework with (4·6~2)(4~4·6~(10)·8)(4~(14)·6~(12)·8~2) topology. Compound 2 is a 3D (4,5,8)-connected framework with (4~3·6~2·8)(4~3·6~5·8~2)(4~8·6~2)(4~(10)·6~(10)·8~8) topology. Compound 3 exhibits a 2D ->3D polythreading architecture. The photoluminescent spectra indicate that at room temperature, compounds 2 and 3 emit green and blue luminescence, respectively.