Two Coordination Polymers Constructed by Cd（Ⅱ） and Zn（Ⅱ） with in situ Generated 5-（3-Pyridyl）tetrazolate Ligand:Syntheses,Crystal Structures and Luminescence Properties

卢文贯王小兵刘宏文洪显兰

Department of Chemistry,Shaoguan University

摘要：Hydrothermal reactions of 3-cyanopyridine and Na N3 with Zn Cl₂ or Cd Cl₂·5/2H₂ O in the presence of 1,4-benzenedicarboxylic acid（H2bdc） yielded two new coordination polymers,{[Zn（3-ptz）（bdc）_0.5（H₂O）₂]n·2H₂O}_n（1） and [Cd₂（3-ptz）₂Cl₂]_n（2）,based on in situ synthesized 5-（3-pyridyl）tetrazolate（3-ptz-） organic ligand.They have been structurally characterized by elemental analysis（EA）,infrared spectroscopy（IR） and single-crystal/powder X-ray diffraction（PXRD）.In 1,two Zn（Ⅱ） ions are linked together through two μ₂-（3-ptz-） ligands to form a dimeric unit of [Zn（μ₂-3-ptz）（H₂O）₂]₂²⁺,which is further connected with other equivalent units by μ₂-bdc^2-spacers,resulting in an infinite 1D polymeric chain of [Zn₂（3-ptz）₂（H₂O）₂（bdc）]_n,and then strong hydrogen bonding interactions extend these 1D chains into a 3D supramolecular structure.In 2,the Cd（Ⅱ） ions are connected through μ₄-（3-ptz-） ligands and Cl-anions,leading to infinite 2D layers of [Cd₂（3-ptz）Cl₂]_nⁿ⁺,which are further linked by another μ₄-（3-ptz-） pillared ligand to form a 3D layered-pillared framework architecture of [Cd)2（3-ptz）)2Cl)2])n.Furthermore,thermal stability of these compounds was measured by thermogravimetric analysis（TGA） and their photoluminescent properties were also investigated in the solid state at room temperature.

基金资助：

supported by the National Natural Science Foundation of China（No.21071099）； Natural Science Foundation of Guangdong Province（No.2015A030313750）； Characteristic Innovation Projects Guangdong Provincial Department of Education（Natural Science Category,2014KTSCX169）；