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Orange-Red Phosphorescent Iridium(III) Complexes Bearing Bisphosphine Ligands: Synthesis, Photophysical and Electrochemical Properties, and DFT Calculations
Organometallics ( IF 2.5 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1021/acs.organomet.7b00740
Gao-Nan Li 1 , Shao-Bin Dou 1 , Tao Zheng 1 , Xiao-Qing Chen 1 , Xiao-Han Yang 1 , Shuang Wang 1 , Wei Sun 1 , Guang-Ying Chen 2 , Zheng-Rong Mo 2 , Zhi-Gang Niu 1
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Nine new phosphorus-coordinated iridium(III) complexes of the form [Ir(CN)2(PP)]PF6, [Ir(F-piq)2(xantphos)]PF6 (1), [Ir(F-piq)2(binap)]PF6 (2), [Ir(F-piq)2(dppp)]PF6 (3), [Ir(Me-piq)2(xantphos)]PF6 (4), [Ir(Me-piq)2(binap)]PF6 (5), [Ir(Me-piq)2(dppp)]PF6 (6), [Ir(CF3O-piq)2(xantphos)]PF6 (7), [Ir(CF3O-piq)2(binap)]PF6 (8), and [Ir(CF3O-piq)2(dppp)]PF6 (9) (F-piq = 1-(4-fluorophenyl)isoquinoline, Me-piq = 1-(p-tolyl)isoquinoline, CF3O-piq = 1-(4-(trifluoromethoxy)phenyl)isoquinoline, xantphos = 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene, binap = 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, dppp = 1,3-bis(diphenylphosphanyl)propane), have been synthesized and fully characterized. The crystal structures of 1, 7, and 9 have been determined by X-ray analysis. The most representative molecular orbital energy-level diagrams and the lowest energy electronic transitions of 19 have been calculated with density functional theory (DFT) and time-dependent DFT (TD-DFT). All of the complexes are orange-red emissive with quantum efficiencies of 3.2–24.4% and lifetimes of 1.77–3.19 μs in degassed CH2Cl2 solution at room temperature. These research results reveal that the Me-piq CN ligand and xantphos PP ligand are beneficial for a red shift of absorption and emission wavelength. Complex 4 has better charge transfer ability, which probably promises its use as a red-phosphorescent material.

中文翻译:

具有双膦配体的橙红色磷光铱(III)配合物:合成,光物理和电化学性质以及DFT计算

形式的[Ir(C九个新磷配位铱(III)配合物 N)2(P P)] PF 6,物[Ir(F-PIQ)2吨(Xantphos)] PF 61),的[Ir (F-piq)2(binap)] PF 62),[Ir(F-piq)2(dppp)] PF 63),[Ir(Me-piq)2(xantphos)] PF 64),[Ir(Me-piq)2(binap)] PF 65),[Ir(Me-piq)2(dppp)] PF 66),[Ir(CF3 O-piq)2(xantphos)] PF 67),[Ir(CF 3 O-piq)2(binap)] PF 68)和[Ir(CF 3 O-piq)2(dppp) ] PF 69)(F-piq = 1-(4-氟苯基)异喹啉,Me-piq = 1-(甲苯基)异喹啉,CF 3 O-piq = 1-(4-(三氟甲氧基)苯基)异喹啉,xantphos = 9,9-二甲基-4,5-双(二苯基膦基)氧杂蒽,binap = 2,2'-双(二苯基膦基)-1,1'-联萘基,dppp = 1,3-双(二苯基膦基)丙烷) ,已经合成并充分表征。的晶体结构17,和9已经通过X射线分析确定。最有代表性的分子轨道能级图和的最低能量的电子跃迁1 - 9已经被计算同密度泛函理论(DFT)和时间依赖性的DFT(TD-DFT)。在室温下,所有已脱气的CH 2 Cl 2溶液均是橙红色发射的,量子效率为3.2–24.4%,寿命为1.77–3.19μs 。这些研究结果表明,在ME-PIQÇ Ñ配体和XANTPHOS P P配体是用于吸收和发射波长的红移是有益的。复杂4 具有更好的电荷转移能力,这可能有望将其用作红色磷光材料。
更新日期:2017-12-20
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