Abstract
Three coordination polymers, [Cd(L)2(H2O)2]n (1), [Zn(L)2(H2O)2]n (2) and [Mn(L)2]n (3) were prepared by reacting 5-(3-pyridyl)-1,3,4-oxadiazole-2-thioacetic acid (HL) with corresponding metal acetate in DMF/CH3CN medium under solvothermal condition. The isolated complexes were characterized by elemental analysis and infrared spectroscopy. The X-ray crystallographic analysis revealed double strand structure of 1 and 2, and 3D framework of 3. The different structures of these complexes indicate that the configuration of the ligand and the reaction condition play a key role in self-assemble of complexes 1-3. Furthermore, photoluminescent properties of 1 and 2 were also studied in the solid state.
Highlights
More and more attention has been paid to coordination compounds with various of topological structures and potential promising applications ranging from functional material to therapeutic agent.[1,2,3,4,5,6]
While the bent organic ligands can offer the possibility of constructing novel polymer network owing to their variable conformation.15 1,3,4-Oxadiazole is an intensively investigated class of bent organic bridging moiety due to its convenient synthesis as well as the versatile coordination mode.[9,16,17,18]
The mixing of metal salts and carboxylic ligand solution resulted in precipitation in traditional aqueous reaction system solvothermal synthesis was adopted
Summary
More and more attention has been paid to coordination compounds with various of topological structures and potential promising applications ranging from functional material to therapeutic agent.[1,2,3,4,5,6] Many factors need to be considered during the self-assembly process of coordination compound, including the nature of the metal ion, the well-designed organic ligand, the auxiliary ligand, the solvent medium, the pH value, the temperature, and so on.[7]. Rigid linear organic ligands such as 4,4’-bipyridine and its derivatives are well adopted in generating polymers bearing linear chain,[11] honeycomb-like,[12] square-like,[13] or brick-wall-like structures.[14,15] While the bent organic ligands can offer the possibility of constructing novel polymer network owing to their variable conformation.15 1,3,4-Oxadiazole is an intensively investigated class of bent organic bridging moiety due to its convenient synthesis as well as the versatile coordination mode.[9,16,17,18] Coordination polymers, with structures like helical chain,[19] zeolite-like net,[16] and 3-fold interpenetrated 3D framework,[15] have been reported by Dong group
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