Citation: ZHOU Yong-Hui, XU Qiu-Lei, LIU Chen-Lu, XU Jing-Jing. Synthesis and Opto-electronic Property of Three Green Iridium（Ⅲ） Complexes[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(7): 1267-1274. doi: 10.11862/CJIC.2020.165 shu

Synthesis and Opto-electronic Property of Three Green Iridium（Ⅲ） Complexes

ZHOU Yong-Hui ^1,#,, ,
XU Qiu-Lei ^2,#,, ,
LIU Chen-Lu ¹ ,
XU Jing-Jing ¹

1.
Collaborative Innovation Center for Atmospheric Environment and Equipment Technology, College of Chemistry and Materials, Nanjing University of Information Science&Technology, Nanjing 210044, China
2.
Key Lab for Special Functional Materials of Ministry of Education, College of Materials, Henan University, Kaifeng, Henan 475004, China

Corresponding author: ZHOU Yong-Hui, 002083@nuist.edu.cn; qiuleixu@163.com XU Qiu-Lei, qiuleixu@163.com
Received Date: 11 November 2019
Revised Date: 10 April 2020

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This work reports the synthesis and properties of three iridium(（Ⅲ）) complexes ((tfmppy)₂Ir(F-tpip), (tfmppy)₂Ir (MeO-tpip) and (tfmppy)₂Ir(tnin)) with 2-(4-(trifluoromethyl)phenyl)pyridine (tfmppy) as main ligand and tetra(4-fluoropheny) imidodiphosphinate (F-tpip), tetra(4-methoxypheny)imidodiphosphinate (MeO-tpip), tetra(naphthalen-1-yl) imidodiphosphinate (tnin) as ancillary ligands, respectively. Their structures were confirmed by ¹H NMR, MS (MALDI-TOF), elemental and single crystal analysis. Both (tfmppy)₂Ir(F-tpip) and (tfmppy)₂Ir(MeO-tpip) complexes belong to P1 space group of triclinic crystal system. The complex (tfmppy)₂Ir(tnin) belongs to R3c space group of trigonal crystal system. All the complexes are green materials with similar emission color and photoluminescence quantum efficiency ((tfmppy)₂Ir(F-tpip):λ_em=526 nm, Φ=0.52; (tfmppy)₂Ir(MeO-tpip):λ_em=523 nm, Φ=0.44; (tfmppy)₂Ir (tnin):λ_em=522 nm, Φ=0.48). In addition, the excited state lifetimes of (tfmppy)₂Ir(F-tpip), (tfmppy)₂Ir(MeO -tpip) and (tfmppy)₂Ir(tnin) were 2.51, 2.00 and 3.88 μs, respectively. Furthermore, they all showed good reversible redox peaks in the cyclic voltammetry curves, and their energy levels were also calculated ((tfmppy)₂Ir(F-tpip):E_HOMO=-5.67 eV, E_LUMO=-3.29 eV; (tfmppy)₂Ir(MeO-tpip):E_HOMO=-6.08 eV, E_LUMO=-3.61 eV; (tfmppy)₂Ir(tnin):E_HOMO=-5.69 eV, E_LUMO=-3.22 eV).
- iridium(Ⅲ) complex,
- phosphorescence material,
- green emission,
- crystal structure,
- electrochemical property
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