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 北京分子科学国家实验室, 稀土材料化学与应用国家重点实验室 北京,100871
扫 描 看 全 文
葛国平, 李春艳, 郭海清. 新型蓝色磷光嘧啶铱(Ⅲ)配合物的合成及发光性质[J]. 发光学报, 2012,(6): 591-595
GE Guo-Peng, LI Chun-Yan, GUO Hai-Qing. Synthesis and Luminescence Property of Two New Blue Phosphorescent Iridium(Ⅲ) Diazine Complexes[J]. Chinese Journal of Luminescence, 2012,(6): 591-595
葛国平, 李春艳, 郭海清. 新型蓝色磷光嘧啶铱(Ⅲ)配合物的合成及发光性质[J]. 发光学报, 2012,(6): 591-595 DOI: 10.3788/fgxb20123306.0591.
GE Guo-Peng, LI Chun-Yan, GUO Hai-Qing. Synthesis and Luminescence Property of Two New Blue Phosphorescent Iridium(Ⅲ) Diazine Complexes[J]. Chinese Journal of Luminescence, 2012,(6): 591-595 DOI: 10.3788/fgxb20123306.0591.
设计并合成了以2-(2,4-二氟苯基)嘧啶(DFPPM)为主配体的两种新型二嗪铱配合物 (Ph:苯基)和,用核磁共振(NMR)和质谱等方法对其进行了表征,并用紫外-可见吸收光谱和光致发光光谱对其光学性质进行了研究。光致发光光谱结果显示:配合物 的发射峰波长为472 nm和489 nm;而配合物 的发射峰波长为447 nm和472 nm,1931CIE色度坐标为(0.14,0.15),是一种深蓝色磷光材料。以 为客体材料、PVK为主体材料制备了电致发光器件,研究了其电致发光光谱。结果表明,电致发光光谱与光致发光光谱相比有较大程度的红移。
We designed and synthesized two new iridium (Ⅲ) diazine complexes and, where Ph= phenyl, containing 2-(2,4-difluorophenyl)- pyrimidine (DFPPM) as the cyclometalated ligands. OLEDs with iridium(Ⅲ) diazine complexes as phosphor have high-efficiency and long luminance half-life, however, diazine compounds show a significantly redshift of the emission band than pyridine compounds. Therefore, it will be a great challenge to synthesize blue phosphorescent materials with diazine compounds as ligands. The complexes were characterized by nuclear magnetic resonance (NMR) spectroscopy and mass spectrometry (MS) and their photophysical properties were investigated by UV-Vis spectroscopy and photoluminescence (PL) technique. The PL spectrum of in solution has its maximum emission peak at 472 nm and 489 nm, whereas has its maximum emission peak at 447 nm and 472 nm. The luminescence of shifts to the blue region compared to that of (DFPPM),2,Ir(acac), indicating that the HOMO-LUMO gap is increased due to the higher ligand field strength of the phosphine. Compared with, shows a significantly blue-shift of the emission band. The ligand field strength of CN is larger than Cl due to its strong donor and acceptor ability. This causes larger splitting of the d-orbital and consequently more lowering of the metal-centered HOMO. Complex of (DFPPM) ,2,Ir(CN)(PPh,3,) emits deep blue light with Commission Internationale de lEclairage (CIE) coordinates of (0.14, 0.15). Electroluminescence (EL) device was fabricated when the complex of was doped into polymer host polyvinylcarbazole (PVK). Compared to the photoluminescence spectrum, a red-shifted of emission was observed from the electroluminescence spectrum. The reason of red-shift of EL spectra is in progress.
二嗪铱配合物有机电致发光器件磷光材料蓝光材料
iridium (Ⅲ) diazine complexorganic light-emitting devicesphosphorescent materialblue-light material
Baldo M A, O’Brien D F, You Y, et al. Highly efficient phosphorescent emission from organic electroluminescent devices [J]. Nature, 1998, 395(6698):151-154.[2] Chi Y, Chou P T. Contemporary progresses on neutral, highly emissive Os(Ⅱ) and Ru(Ⅱ) complexes [J]. Chem. Soc. Rev., 2007, 36(9):1421-1431.[3] Carlson B, Phelan G D, Kaminsky W, et al. Divalent osmium complexes:Synthesis, characterization, strong red phosphorescence, and electrophosphorescence [J]. J. Am. Chem. Soc., 2002, 124(47):14162-14172.[4] Cheng Y M, Yeh Y S, Ho M L, et al. Dual room-temperature fluorescent and phosphorescent emission in 8-quinolinolate osmium(ⅱ) carbonyl complexes:Rationalization and generalization of intersystem crossing dynamics [J]. Inorg. Chem., 2005, 44(13):4594-4603.[5] Wu P C, Yu J K, Song Y H, et al. Synthesis and characterization of metal complexes possessing the 5-(2-pyridyl) pyrazolate ligands:The observation of remarkable osmium-induced blue phosphorescence in solution at room temperature [J]. Organometallics, 2003, 22(24):4938-4946.[6] Yu J K, Hu Y H, Cheng Y M, et al. A remarkable ligand orientational effect in osmium-atom-induced blue phosphorescence [J]. Chem. Eur. J., 2004, 10(24):6255-6264.[7] Moussa J, Wong K M C, Chamoreau L M, et al. Luminescent 1D chain of platinum(Ⅱ) terpyridyl units with p-dithiobenzoquinone organometallic linker:Self-aggregation imparted from Pt…Pt/π-π interactions [J]. Dalton. Trans., 2007 (32):3526-3530.[8] Kavitha J, Chang S Y, Chi Y, et al. In search of high-performance platinum(Ⅱ) phosphorescent materials for the fabrication of red electroluminescent devices [J]. Adv. Funct. Mater., 2005,15(2):223-229.[9] Gong X, Ostrowski J C, Bazan G C, et al. Electrophosphorescence from a conjugated copolymer doped with an iridium complex:High brightness and improved operational stability [J]. Adv. Mater., 2003, 15(1):45-49.[10] Chen X, Liao J L, Liang Y M, et al. High-efficiency red-light emission from polyfluorenes grafted with cyclometalated iridium complexes and charge transport moiety [J]. J. Am. Chem. Soc., 2003, 125(3):636-637.[11] Lamansky S, Djarovich P, Murphy D, et al. Highly phosphorescent bis-cyclometalated iridium complexes:Synthesis, photophysical characterization, and use in organic light emitting diodes [J]. J. Am. Chem. Soc., 2001, 123(18):4304-4312.[12] Hwang F M, Chen H Y, Chen P S, et al. Iridium(Ⅲ) complexes with orthometalated quinoxaline ligands:Subtle tuning of emission to the saturated red color [J]. Inorg. Chem., 2005, 44(5):1344-1353.[13] Su Y J, Hung H L, Li C L, et al. Highly efficient red electrophosphorescent devices based on iridium isoquinoline complexes:Remarkable external quantum efficiency over a wide range of current [J]. Adv. Mater., 2003, 15(11):884-888.[14] Holmes R J, Forrest S R, Tung Y J, et al. Blue organic electrophosphorescence using exothermic host-guest energy transfer [J]. Appl. Phys. Lett., 2003, 82(15):2422-2424.[15] Yeh S J, Wu M F, Chen C T, et al. New dopant and host materials for blue-light-emitting phosphorescent organic electroluminescent devices [J]. Adv. Mater, 2005, 17(3):285-289.[16] Lee C L, Das R R, Kim J J. Polymer-based blue electrophosphorescent light-emitting diodes using a bisorthometalated Ir(Ⅲ) complex as the triplet emitter [J]. Chem. Mater., 2004, 16(23):4642-4646.[17] Lee S J, Park K M, Yang K, et al. Blue phosphorescent Ir(Ⅲ) complex with high color purity:Fac-tris(2',6'-difluoro-2,3'-bipyridinato-N,C4)iridium(Ⅲ) [J]. Inorg. Chem., 2009, 48(3):1030-1037.[18] Tsuboyama A, Mizutani H, Okada S, et al. Luminescence device and display apparatus and metal coordination compound EPO Patent:EP1191612. 2002-03-27.[19] Ge G P, Yu X H, Guo H Q, et al. Polymer-based blue electrophosphorescent light-emitting diodes based on a new iridium(Ⅲ) diazine complex [J]. Synthetic. Met., 2009, 159(12):1178-1182.[20] Ge G P, He J, Guo H Q, et al. Highly efflcient phosphorescent iridium (Ⅲ) diazine complexes for OLEDs:Different photophysical property between iridium (Ⅲ) pyrazine complex and iridium (Ⅲ) pyrimidine complex [J]. J. Organomet. Chem., 2009, 694(19):3050-3057.[21] Lyu Y Y, Byun Y, Kwon O, et al. Substituent effect on the luminescent properties of a series of deep blue emitting mixed ligand Ir(Ⅲ) complexes [J]. J. Phys. Chem. B, 2006, 110(21):10303-10314.[22] Zhang Xuju, Xu Yunhua, Shi Huahong. Synthesis and phosphorescence of a new greenish-blue lighting-emitting Iridium(Ⅲ) bis(1-phenylpyridine)(1,2,4-triazole pyridine) [J]. Chin. J. Lumin.(发光学报), 2007, 28(1):44-48 (in Chinese).
0
浏览量
11
下载量
1
CSCD
关联资源
相关文章
相关作者
相关机构