21441-24-7Relevant articles and documents
Efficient greenish-blue phosphorescent iridium(III) complexes containing carbene and triazole chromophores for organic light-emitting diodes
Li, Hong,Yin, Yong-Ming,Cao, Hong-Tao,Sun, Hai-Zhu,Wang, Li,Shan, Guo-Gang,Zhu, Dong-Xia,Su, Zhong-Min,Xie, Wen-Fa
, p. 55 - 62 (2014)
Two heteroleptic iridium(III) complexes using carbene as cyclometalated ligands and pyridine-triazole as ancillary ligand, namely (fpmi) 2Ir(mtzpy) (1) and (fpmi)2Ir(phtzpy) (2) [fpmi = 1-(4-fluorophenyl)-3-methylimdazolin-2-ylidene-C,C2′, mtzpy = 2-(5-methyl-2H-1,2,4-triazol-3-yl)pyridine, phtzpy = 2-(5-phenyl-2H-1,2,4- triazol-3-yl)pyridine], were synthesized and their structural, photophysical and electrochemical properties investigated systematically. Both complexes exhibit bright greenish-blue phosphorescence (λmax ～490 nm) with quantum yields of about 0.50. Comprehensive density functional theory (DFT) approach was then performed to gain insights into their photophysical and electrochemical characters. The fabrication of organic light-emitting diodes (OLEDs), employing complexes 1 and 2 as phosphorescent dopants, was successfully achieved. Among them, the device based on 1 exhibited considerable power efficiency (ηp) of 11.43 lm W-1 and current efficiency (ηc) of 11.78 cd A-1. With the merit of intrinsic characteristic of complex 1, a white OLED comprised of 1 and one orange phosphor (pbi)2Ir(biq) achieved a peak ηp of 9.95 lm W -1 and ηc of 10.81 cd A-1, together with Commission Internationale de l'Eclairage (CIE) coordinates of (0.34, 0.40). The results indicate that two iridium(III) complexes reported here are promising phosphorescent dyes for OLEDs.
Core-shell Cu2S:NiS2@C hybrid nanostructure derived from a metal-organic framework with graphene oxide for photocatalytic synthesis of N-substituted derivatives
Yusuf, Mohammad,Hira, Shamim Ahmed,Lim, Hyeonhan,Song, Sehwan,Park, Sungkyun,Park, Kang Hyun
, p. 9018 - 9027 (2021/04/16)
Recently, photocatalysis has attracted considerable interest, leading to opportunities for using renewable energy sources. A Cu:Ni metal-organic framework (MOF) modified with graphene oxide (GO) was fabricated by a facile and convenient process. Subsequen
Facile synthesis of hydrochar supported copper nanocatalyst for Ullmann C–N coupling reaction in water
Ge, Xin,Ge, Meng,Chen, Xinzhi,Qian, Chao,Liu, Xuemin,Zhou, Shaodong
, (2019/12/24)
The exploration of inexpensive and stable heterogeneous catalysts and application of green solvents for Ullmann C–N coupling reaction remain challenging. We present a facile fabrication of copper nanoparticles on hydrochar as prepared from natural, inexpensive and renewable chitosan together with in-situ reduction of copper salt in a one-pot hydrothermal carbonization process. The copper nanoparticles were uniformly dispersed on hydrochar by choosing block copolymer F127 as surfactant. Moreover, maleic acid was introduced to improve the hydrophilicity of hydrochar. The most active copper nanocomposite catalyst, that is, Cu/HCS-MA-F127, exhibited excellent catalytic activity for Ullmann C–N coupling reaction in water. The nature of the Cu/HCS-MA-F127 was characterized by FTIR spectroscopy, TG, XRD, SEM and XPS. Moderate to excellent yields of aimed products were gained by using this catalytic strategy. Moreover, the Cu/HCS-MA-F127 catalyst can be reused by simple centrifugal recovery with a stable performance.
