Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands

ZHOU Rui; SONG Xin-chao; TIAN Jie; WANG Ge-yang; WANG Zi-jun; XU Mao-liang; HU Lin-lin

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Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands

paper | 更新时间：2020-08-12

- Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands
- Chinese Journal of Luminescence Vol. 31, Issue 2, Pages: 279-284(2010)
- 作者机构：
  
  西安近代化学研究所,陕西西安,710065
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：20 November 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 April 2010，
  
  Published：30 April 2010
- 稿件说明：
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ZHOU Rui, SONG Xin-chao, TIAN Jie, et al. Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands[J]. Chinese journal of luminescence, 2010, 31(2): 279-284.
DOI：

ZHOU Rui, SONG Xin-chao, TIAN Jie, et al. Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands[J]. Chinese journal of luminescence, 2010, 31(2): 279-284. DOI：

摘要

合成了三个以含氟苯基吡啶及吡啶基咪唑为配体的蓝色磷光电致发光铱配合物(

)

Ir(pym)

其中主配体(

)分别为2-(2'

4'-二氟苯基)-4-甲基吡啶、2-(3'

5'-二氟苯基)-4-甲基吡啶;辅助配体pymH为2-(2'-吡啶基)咪唑。通过元素分析、核磁、质谱、红外进行结构表征;用紫外可见吸收光谱、荧光光谱以及循环伏安进行其光谱学性能表征。以pymH取代辅助配体picH(2-吡啶甲酸)的方法

得到含吡啶基咪唑的铱配合物

在室温下二氯甲烷溶液中获得强的蓝光发射

其最大发光波长分别是461

480

490 nm

其中(46f

pmpy)

Ir(pym)较经典蓝光磷光材料FIrpic蓝移5 nm。

Abstract

Three new blue phosphorescent iridium complexes containing 2-(difluorophenyl)-4-methylpyridine as the cyclometalated ligands and 2-(pyridyl-2-yl)imidazole as an ancillary ligand have been synthesized and characterized. The complexes have the general structure (

)

Ir(pym)

where

is cyclometalating ligand 2-(2

4-difluorophenyl)-4-methylpyridine(24f

pmpyH)

2-(3

4-difluorophenyl)-4-methylpyridine (34f

pmpyH) and 2-(3

5-difluorophenyl)-4-methylpyridine (35f

pmpyH)

pym is 2-(pyridyl-2-yl) imida-zole (pymH). Their structures were identified by FTIR

H-NMR

MS and elemental analysis. The absorption

emission

and cyclic voltammetry of the complexes were systematically investigated. By replacing the ancillary ligand pic with pym can finely tune emission of the iridium complexes

showing blue luminescence wavelength peaked at 461

480

490 nm at room temperature in CH

. The (46f

pmpy)

Ir(pym) shows 5 nm blue shift in comparison with FIrpic in CH

solution.

关键词

Keywords

references

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