Synthesis,Structure and Highly Enhanced Phosphorescence of a Cadmium(Ⅱ)Coordination Polymer Assembled with 1,4-Naphthalenedicarboxylic Acid and 2-Propylimidazole

• 来源期刊: 结构化学
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: coordination cbemistry
• 页码范围: 187-192
• 页数: 6页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2793

摘要

One cadmium(Ⅱ)coordination polymer[Cd(l,4-NDC)(PPIM)2]n(1,1,4-H2NDC = 1,4-na-phthalenedicarboxylic acid,PPIM = 2-propylimidazole),has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis,TGA and X-ray single-crystal diffraction.Complex 1 crystallizes in monoclinic with space group P21/n,a = 8.8292(2),b = 16.6936(4),c = 16.7869(4)?,β = 99.701(2)°,V =2438.86(10)?3,Z= 4,Dc= 1.489 Mg/m3,F(000)= 1112,μ = 0.932 mm-1,S = 1.076,the final R = 0.0360 and wR= 0.0850.In 1,the 1,4-NDC ligand bridges the Cd(Ⅱ)to form a 1D infinite chain,which are connected through N-H…O hydrogen bond to form a 2D layer then to an overall 3D supramolecular structure.The time-resolved measurements indicate that 1 shows highly prolonged phosphorescent lifetime about 452 times in comparison with that of pristine PPIM ligand.Single-crystal analysis and theory calculations indicate that strong coordination bonds and complete separation of HOMOs and LUMOs in the rigid matrix of 1 promote the long-last phosphorescence emission.