物理化学学报 >> 2015, Vol. 31 >> Issue (1): 17-22.doi: 10.3866/PKU.WHXB201411212

热力学,动力学和结构化学 上一篇    下一篇

一种吡嗪铱(Ⅲ)配合物的晶体结构及光物理性质

韦传东1, 葛国平1, 李春艳1, 雷克微1, 梁洪泽1, 禹钢2, 刘志伟2   

  1. 1. 宁波大学材料科学与化学工程学院, 宁波市新型功能材料及其制备科学实验室-省部共建国家重点实验室培育基地, 浙江 宁波 315211;
    2. 北京大学化学与分子工程学院, 稀土材料化学与应用国家重点实验室, 北京 100871
  • 收稿日期:2014-10-23 修回日期:2014-11-21 发布日期:2014-12-25
  • 通讯作者: 葛国平, 刘志伟 E-mail:geguoping@nbu.edu.cn;zwliu@pku.edu.cn
  • 基金资助:

    宁波市自然科学基金(2010A610164, 2010A610187), 宁波市重大择优委托项目(2012C5002)和宁波大学王宽城基金资助

Crystal Structure and Photophysical Properties of an Iridium(Ⅲ) Pyrazine Complex

WEI Chuan-Dong1, GE Guo-Ping1, LI Chun-Yan1, LEI Ke-Wei1, LIANG Hong-Ze1, YU Gang2, LIU Zhi-Wei2   

  1. 1. State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang Province, P. R. China;
    2. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2014-10-23 Revised:2014-11-21 Published:2014-12-25
  • Contact: GE Guo-Ping, LIU Zhi-Wei E-mail:geguoping@nbu.edu.cn;zwliu@pku.edu.cn
  • Supported by:

    The project was supported by the Ningbo Municipal Natural Science Foundation, China (2010A610164,2010A610187), Ningbo Social Development Project, China (2012C5002), and K. C. Wong Magna Fund of Ningbo University, China.

摘要:

合成了一种铱配合物二(4,4'-二氟-5-甲基-2,3-二苯基吡嗪) (乙酰丙酮)合铱[(MDPPF)2Ir(acac)]的有机电致发光器件(OLED),利用X射线单晶衍射仪测定了该化合物的晶体结构. 利用紫外-可见吸收光谱、发射光谱对其光物理性质进行研究. 结果表明: (MDPPF)2Ir(acac)的单晶结构属于三斜晶系, P1空间群,晶胞参数a=1.13984(3) nm, b=1.26718(3) nm, c=1.29541(3) nm, α=93.7181(19)°, β=101.638(2)°, γ=110.853(3)°, V=1.69336(7) nm3; (MDPPF)2Ir(acac)在二氯甲烷溶液中的发射峰为555 nm. 以(MDPPF)2Ir(acac)为客体材料,制备了结构为ITO/NPB(40 nm)/CBP: (MDPPF)2Ir(acac)(20 nm)/TPBi(10 nm)/Alq3 (30 nm)/LiF(1 nm)/Al(100 nm)的一系列不同掺杂浓度器件, 器件的发射峰位于558 nm, 最大亮度达到32700 cd·m-2,最大电流效率44.3 cd·A-1, 最大功率效率20.7 lm·W-1.

关键词: 铱(Ⅲ)配合物, 吡嗪, 磷光材料, 有机电致发光器件

Abstract:

An iridium(Ⅲ) complex of (MDPPF)2Ir(acac) (MDPPF=4,4'-difluoro-5-methyl-2,3-diphenylpyrazine, acac=acetylacetone) has been prepared and characterized by X-ray single crystal diffraction. The photophysical properties of (MDPPF)2Ir(acac) were investigated using UV-Vis spectroscopy and photoluminescence (PL) techniques. X-ray diffraction (XRD) studies revealed that the complex belongs to a triclinic systemof the P1 space group with cell dimensions a=1.13984(3) nm, b=1.26718(3) nm, c=1.29541(3) nm, α=93.7181(19)°, β= 101.638(2)°, γ=110.853(3)° and V=1.69336(7) nm3.Asolution of the (MDPPF)2Ir(acac) complex in dichloromethane was found to emit yellowlight with amaximumpeak at 555 nmat roomtemperature. Furthermore, (MDPPF)2Ir(acac) was used as a phosphorescence dopant in organic light-emitting diodes (OLEDs) with the structures of ITO/NPB (40 nm)/CBP:(MDPPF)2Ir(acac) (20 nm)/TPBi (10 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm). These devices showed yellowemission at 558 nm, a maximumbrightness of 32700 cd·m-2, current efficiency of 44.7 cd·A-1 and power efficiency of 20.7 lm·W-1.

Key words: Iridium(Ⅲ) complex, Pyrazine, Phosphorescent material, Organic light-emitting diode

MSC2000: 

  • O641