共查询到16条相似文献,搜索用时 140 毫秒
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以2-苯基吡啶(ppy)为环金属配体、4,4''-二叔丁基-2,2''-二吡啶(Dtbbpy)为N^N辅助配体,PF6-为对阴离子,合成了一种离子型磷光配合物[Ir(ppy)2(Dtbbpy)]+PF6-,产率为91.0%。通过元素分析(EA)、红外光谱(IR)、核磁共振谱(1H-NMR和13C-NMR)和质谱(MS)对其组成和化学结构进行了确认和表征。采用紫外可见光谱(UV-Vis)和光致发光光谱(PL)研究了其光物理性能,该配合物在二氯甲烷中的最大发射波长为557 nm,属于黄绿光发射离子型铱磷光配合物。 相似文献
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以2-(3,5-二甲基苯基)喹啉(dmpq)为主配体,4,4''-二叔丁基-2,2''-联吡啶(dtbby)为辅助配体,合成出一种新型离子型铱配合物[Ir(dmpq)2(dtbbpy)]PF6。通过元素分析、质谱、核磁共振谱(1H和13C)、红外光谱和单晶X射线衍射表征了配合物的组成和化学结构,通过光致发光光谱和紫外可见光谱研究了配合物的光物理性能,通过热重分析测试了配合物的热稳定性。结果表明,所合成的苯基喹啉类铱配合物呈稍微扭曲的八面体配合物,其发射波长为587 nm,热分解温度为380℃,具有足够的热稳定性,是一种潜在的黄光材料。 相似文献
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以2-(3,5-二甲苯基)异喹啉(mpiq)作为环金属配体,2,2,6,6-四甲基庚二酮(tmd)为辅助配体合成了红光铱配合物Ir(mpiq)2(tmd),产率91.4%。采用元素分析、核磁共振谱、质谱、红外光谱及单晶X射线衍射表征了分子结构,采用紫外-可见吸收光谱和光致发光光谱研究了它的光物理性能。结果表明,该配合物呈稍微扭曲的六配位八面体配合物,为单斜晶系,C2/c空间群。在室温下最大发射波长为632 nm,为深红光发射铱磷光配合物。 相似文献
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以5-(4-氟苯基)-1,3-二甲基-1H-1,2,4-三唑(fdpt)为环金属配体、乙酰丙酮(Hacac)为辅助配体合成出一种新型铱(Ⅲ)配合物Ir(fdpt)2(acac)。采用元素分析、红外光谱、核磁共振谱分析和单晶X衍射对其组成和化学结构进行了表征。结果表明,该配合物化学组成为C25H25F2IrN6O2,属于单斜晶系,P21/c空间群。晶胞参数为a=1.58917(14) nm,b=1.64798(15) nm,c=1.06146(9) nm,β=94.741(3)°,V=2.7704(4) nm3,Z=4。 相似文献
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以两种2,2’-联吡啶衍生物为中性配体,2-(3-氟苯基)吡啶为环金属配体,合成了两种新型的离子型Ir(Ⅲ)配合物Ir1和Ir2。利用核磁、质谱和晶体结构分析确认了配合物Ir1和Ir2的结构。配合物Ir1和Ir2在CH2Cl2溶液中的最大发射波长分别为570和528 nm,为橙红光和黄光。两种配合物在无氧CH2Cl2溶液中的量子产率分别为0.88和0.57,磷光寿命分别为2.43和2.40 μs。通过理论计算详细讨论了中性配体的取代基种类对其光谱性质的影响。在配合物Ir1的DMSO/H2O溶液中加入OH-后,其发射峰强度提高了近100倍,溶液的发光颜色由红色变为明亮的绿色,检出限为8.47×10-6 mol/L。机理研究表明,OH-取代了Ir1的中性配体上的溴取代基,形成了新的含有羟基的配合物,从而改变了Ir1的光谱特性,实现对OH-的高选择性和高灵敏度检测。 相似文献
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以氯桥二聚体(ppy)2Ir(μ-Cl2)Ir(ppy)2、4,4''-二羧基-2,2''-联吡啶和六氟磷酸铵为原料合成了一种阳离子型铱配合物[Ir(ppy)2(dcbpy)]PF6,产率94.9%。并通过元素分析、质谱、红外光谱以及核磁共振谱表征确认了目标产物的分子结构。以溶剂缓慢挥发法培养出配合物单晶,经X射线单晶衍射仪表征、计算,获得了晶体结构参数。紫外-可见吸收光谱和光致发光光谱的研究表明,该配合物常温最大发射位于582 nm处,显示发射强烈的黄光。 相似文献
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A new yellow-emitting iridium complex Ir(3-piq)2pt with 3-phenylisoquinoline(3-piq) as cyclometalated ligand by introducing 2-(2H-1,2,4-triazol-3-yl)pyridine (pt) as ancillary ligand was synthesized. Efficient yellow polymer light-emitting devices (PLEDs) with the new iridium complex Ir(3-piq)2pt in device structure ITO/PEDOT/PVK/Ir-complex (x%):PFO (or +PBD (30%))/Ba/Al (with or without PBD electron transports additive) were fabricated. The device doped with 4% Ir(3-piq)2pt displayed a quantum efficiency of 9.4% (16.2 cd/A) at 5.06 mA/cm2 with PBD additive. A white emission was also obtained at a doping concentration of 0.5% Ir(3-piq)2pt with no PBD added. CIE coordinate (0.34 and 0.31) close to National Television Standards Committee (NTSC) white standard, external quantum efficiency of 2.25%, and luminance of 2250 cd/m2 at applied voltage of 15 V were obtained. The results indicated that introducing triazole group based ancillary ligand into iridium complexes could enhance the electron-transporting ability of the iridium complexes. 相似文献
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以4-(苯并[d]噻唑-2-基)-N,N-二甲基苯胺(1)、L-丝氨酸作为主配体和辅助配体,合成了一种新型环金属铱配合物(2),所有化合物的结构通过1H NMR、MS和IR进行了表征确认。通过紫外吸收光谱和荧光发射光谱研究了铱配合物(2)的光物理性质,并采用含时密度泛函理论(TDDFT)对其最低能量电子跃迁和最低三重激发态进行了计算。而且铱配合物(2)的荧光发射光谱可选择性地被汞离子猝灭,暗示着此配合物可作为一种高效的turn-off型汞离子磷光传感器。 相似文献
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Fangliang Xiao Yu Liu Zhengyong Hu Quan Gan Lei Wang Zhonglin Wen Meixiang Zhu Weiguo Zhu 《Synthetic Metals》2009
A picolinic acid derivative bearing an 1,3,4-oxadiazole unit and its bicyclometalated iridium complex (PhOXD)2Ir(BuPhOXD-Pic) were synthesized and characterized, in which BuPhOXD-Pic is 5-(4′-(5″-(4-tert-butylphenyl)-1″,3″,4″-oxadiazol-2″-yl) phenyl) picolinic acid and PhOXD is 2,5-diphenyl-1,3,4-oxadiazole. The optoelectronic properties of this iridium complex were studied in the double-layer polymer light-emitting devices using a blend of poly (9,9-dioctylfluorene) and 5-biphenyl-2-(4-tert-butyl) phenyl-1,3,4-oxadiazole as a host matrix. This complex exhibited a maximum luminance efficiency of 7.7 cd/A at 5.6 mA/cm2 and a peak brightness of 5288 cd/m2 at 153.7 mA/cm2 in the devices. Compared to the (PhOXD)2Ir(Pic) complex, the (PhOXD)2Ir(BuPhOXD-Pic) complex displays better optoelectronic properties in the devices. This study provides a convenient way to improve the optoelectronic properties of iridium complexes by modifying an ancillary ligand of picolinic acid (Pic) with an 1,3,4-oxadiazole unit. 相似文献
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Kai-Chin Tang Shin-Rong Tseng Wei-Shan Li Hsin-Fei Meng Sheng-Fu Horng Chian-Shu Hsu 《Synthetic Metals》2008
Efficient phosphorescent polymer light-emitting diode with poly(vinylcarbazole) (PVK) doped by two or three iridium complexes in single and bilayer structures are studied. With (tris-(2-4(4-toltyl) phenylpyridine) (Ir(mppy)3) as the green emitter and (1-phenylisoquinoline) (acetylacetonate) iridium(III) (Ir(piq)2) as the red emitter the efficiency is as high as 23 cd/A with broad band emission from 500 nm to 720 nm. For white emission a second layer is added with blue emitter ((III) bis[(4,-6-di-fluorophenyl-pyridinato)N,C2] picolinate) (FIrpic) doped in PVK. White light containing three spectral peaks results with efficiency 8.1 cd/A. As the second blue layer is replaced by the fluorescent (poly(9,9-dioctylfluorene)) (PFO) white emission with high color rendering index 86 is achieved. The efficiency is 5.7 cd/A with peak luminance 8900 cd/m2. For a given iridium complexes ratio the relative intensity of the green and red emission depends sensitively on the second blue layer. 相似文献
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Wenguan Zhang Yongsheng Wang Zhiqun He Linping Mu Ye Zou Chunjun Liang Shengmin Zhao 《Synthetic Metals》2010,160(5-6):354-360
A novel cyclometalated ligand 2-(9,9-diethylfluoren-2-yl)-5-trifluoromethyl-pyridine (fl-5CF3-py), and its complexes bis[2-(9,9-diethylfluoren-2-yl)-5-trifluoromethyl-pyridinto-C3, N]iridium (acetylacetonate) (fl-5CF3-py)2Ir(acac) (5) and bis[2-(9,9-diethylfluoren-2-yl)-5-trifluoromethylpyridinto-C3, N] iridium (2-picolinic acid) (fl-5CF3-py)2Ir(pic) (6) were synthesized, respectively. Trifluoromethyl group and 2-picolinic acid were incorporated into iridium ligands to tune luminescent color. Emission spectra of 5 and 6 in THF solutions were 589 and 572 nm. Decomposition temperatures (Td) of 5 and 6 were 326 and 360 °C. Multilayer electrophosphorescent devices were fabricated using 5 and 6 as emitter dopants with electroluminescent spectra maximized at around 585 and 571 nm, respectively. The relatively high efficiencies of the devices and their slow rate of decay against increases in current densities indicated that (fl-5CF3-py)2Ir(acac) or (fl-5CF3-py)2Ir(pic) was a promising emitter for practical device applications. 相似文献