...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Cyclometallated platinum(II) complexes containing NHC ligands: synthesis, characterization, photophysics and their application as emitters in OLEDs
【24h】

Cyclometallated platinum(II) complexes containing NHC ligands: synthesis, characterization, photophysics and their application as emitters in OLEDs

机译：含有NHC配体的环金属化铂（II）配合物：合成，表征，光物理及其在OLED中作为发光体的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A series of square planar [Pt(N<^>C)(NHC)L] complexes containing cyclometallated N<^>C ligands (phenylpyridine and benzoquinoline) and N-heterocyclic carbene (NHC) - N<^>C = 2-phenylpyridine, 7,8-benzoquinoline; NHC = 1,3-dibenzylbenzimidazolium, 1,3-diethylbenzimidazolium, 1,3-dibenzylimidazolium; L = Cl, Br, - C2Ph -have been synthesized in moderate to good yields. The complexes obtained were characterized using chemical analysis, MS-ESI spectrometry, NMR spectroscopy and X-ray crystallography. The complexes display moderate to strong phosphorescence in solution (Q.Y. 0.3-7.9%) and in the solid state (Q.Y. 2.7-16.0%), which is related to metal modulated intraligand pi-pi* transitions located at the aromatic system of cyclometallated ligands with some contribution of the MLCT excited state. Emission lifetimes fall in the range of 0.2-1.5 mu s in solution and amount up to 13 mu s in the solid state. Analysis of the spectroscopic data together with the density functional theory (DFT) and time-dependent density functional theory (TDDFT) calculations clearly support this assignment and show negligible contribution of the auxiliary ligands to the emissive excited states. The compounds obtained were also used to prepare organic light emitting diode (OLED) devices, which display good luminance efficiency emitting in the green area of the visible spectrum.
机译：一系列方形平面[Pt（N ^ C）（NHC）L]配合物，包含环金属化的N ^ C配体（苯基吡啶和苯并喹啉）和N-杂环卡宾（NHC）-N ^ C = 2-苯基吡啶，7,8-苯并喹啉; NHC ＝ 1，3-二苄基苯并咪唑鎓，1，3-二乙基苯并咪唑鎓，1，3-二苄基咪唑鎓;已经以中等至良好的产率合成了L ＝ Cl，Br，-C 2 Ph。使用化学分析，MS-ESI光谱，NMR光谱和X射线晶体学对所得复合物进行表征。配合物在溶液中（QY 0.3-7.9％）和固态（QY 2.7-16.0％）中显示出中等至强烈的磷光，这与位于环金属化配体芳香体系中的金属调节的配体pi-pi *跃迁有关MLCT激发态的一些贡献。溶液的发射寿命在溶液的0.2-1.5 s s范围内，固态时的发射寿命高达13 s s。光谱数据的分析以及密度泛函理论（DFT）和随时间变化的密度泛函理论（TDDFT）计算清楚地支持了这种分配，并且表明辅助配体对发射激发态的贡献可忽略不计。获得的化合物还用于制备有机发光二极管（OLED）器件，该器件在可见光谱的绿色区域中显示出良好的发光效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号