Evaporable luminescent lanthanide complexes based on novel tridentate ligand  

作　　者：魏晨 姚肖男 孙博勋 蔡泽伦 赵子丰 陈明星 卫慧波 刘志伟 卞祖强 黄春辉 

机构地区：[1]Beijng National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

出　　处：《Journal of Rare Earths》2017年第1期7-14,共8页稀土学报（英文版）

基　　金：Project supported by the National Key Basic Research Program of China(2014CB643802);the National Natural Science Foundation of China(21371012,21321001)

摘　　要：A novel tridentate ligand N-（6-（diphenylphosphoryl）pyridin-2-yl）-2,2,2-trifluoroacetamide （DPPOPFA） was designed and synthesized. Crystal structure of the ligand revealed the ＂keto＂ form of ligand in solid state other than the ＂enor＇ one, and it was also found that two kinds of molecules with different conformations were connected by hydrogen bonding between amide N-H and phos- phoryl P=O. This ionic ligand was used to coordinate a variety of lanthanide ions, forming neutral 3：1 complexes. Absolute overall quantum yields of these complexes in solid states were 36% for Eu（III）, 29% for Tb（III） and 3% for Dy（III） with lifetimes of 1.1, 1.1 and 0.087 ms, respectively. The complexes had excellent thermal stability and did not decompose till 370 ℃. And they could subli- mate in vacuum （1 ×10^-4 Pa） at 330℃ due to the weak molecular interaction.A novel tridentate ligand N-（6-（diphenylphosphoryl）pyridin-2-yl）-2,2,2-trifluoroacetamide （DPPOPFA） was designed and synthesized. Crystal structure of the ligand revealed the ＂keto＂ form of ligand in solid state other than the ＂enor＇ one, and it was also found that two kinds of molecules with different conformations were connected by hydrogen bonding between amide N-H and phos- phoryl P=O. This ionic ligand was used to coordinate a variety of lanthanide ions, forming neutral 3：1 complexes. Absolute overall quantum yields of these complexes in solid states were 36% for Eu（III）, 29% for Tb（III） and 3% for Dy（III） with lifetimes of 1.1, 1.1 and 0.087 ms, respectively. The complexes had excellent thermal stability and did not decompose till 370 ℃. And they could subli- mate in vacuum （1 ×10^-4 Pa） at 330℃ due to the weak molecular interaction.

关 键 词：luminescent complex LANTHANIDE TRIDENTATE evaporable rare earths 

分 类 号：O641.4[理学—物理化学]