Synthesis, crystal structure and photoluminescence of phosphorescent copper (I) complexes containing hole-transporting carbazolyl group

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• 作者：Tianzhi Yu^a ; ^{yutianzhi@hotmail.com} ; Ziyi Wang^a ; ^b ; Yuling Zhao^b ; Xiaoguang Wen^b ; Hui Zhang^a ; Duowang Fan^a
• 关键词：Copper (I) complex ; Crystal structure ; Benzimidazolyl derivative ; Photoluminescence
• 刊名：Inorganica Chimica Acta
• 出版年：2012
• 出版时间：30 March, 2012
• 年：2012
• 卷：383
• 期：Complete
• 页码：78-82
• 全文大小：441 K

文摘

Two mononuclear Cu (I) complexes based on a 2-(2-pyridyl)benzimidazolyl derivative ligand containing the hole-transporting ligand 1-[4-(9-carbazolyl)butyl]-2-(2-pyridyl)benzimidazole (L), [Cu(L)(PPh₃)₂](BF₄) (1) and [Cu(L)(DPEphos)](BF₄) (2), where DPEphos is bis[2-(diphenylphosphino)phenyl]ether, were synthesized and characterized by elemental analysis, ¹H NMR and FT-IR spectra. The structure of complex 2 was determined by X-ray single crystal analysis. It was demonstrated that the central Cu (I) ion in the complex has a distorted tetrahedral geometry and is tetra-coordinated by the two nitrogen atoms from L ligand and two phosphorus atoms from DPEphos ancillary ligand. The photophysical properties of the complexes were examined by using UV-Vis, photoluminescence spectroscopic analysis. The complexes exhibit weak MLCT absorption bands at 410 and 490 nm, and display strong phosphorescence in the solid states at T = 298 K, which is completely quenched in solution.