• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Copper and Gold Cyclic (Alkyl)(amino)carbene Complexes with Sub-Microsecond Photoemissions: Structure and Substituent Effects on Redox and Luminescent Properties
【24h】

Copper and Gold Cyclic (Alkyl)(amino)carbene Complexes with Sub-Microsecond Photoemissions: Structure and Substituent Effects on Redox and Luminescent Properties

机译：铜和金循环（烷基）（氨基）与亚微秒光曝光的卡宾配合物：结构和取代基对氧化还原和发光特性的影响

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

Copper and gold halide and pseudo-halide complexes stabilised by methyl-, ethyl- and adamantyl-substituted cyclic (alkyl)(amino)carbene (CAAC) ligands are mostly linear monomers in the solid state, without aurophilic Au···Au interactions. (~(Et2)L)CuCl shows the highest photoluminescence quantum yield (PLQY) in the series, 70%. The photoemissions of ~(Me2)L and ~(Et2)L copper halide complexes show S1→S0 fluorescence on the ns time scale, in agreement with theory, as well as a long-lived emission. Monomeric (~(Me2)L)CuNCS is a white emitter, whereas dimeric [(~(Et2)L)Cu(m- NCS)]_2 shows intense yellow emission with a photoluminescence (PL) quantum yield of 49 %. The reaction of (~(Ad)L)MCl (M=Cu or Au) with phenols ArOH (Ar=Ph, 2,6-F_2C_6H_3, 2,6- Me_2C_6H_3, 3,5-tBu_2C_6H_3, 2-tBu-5-MeC_6H_3, 2-pyridyl), thiophenol, or aromatic amines H_2NAr'' (Ar'=Ph, 3,5-(CF_3)_2C_6H_3, C_6F_5, 2- py) afforded the corresponding phenolato, thiophenolato and amido complexes. Although the emission wavelengths are only marginally affected by the ring substitution pattern, the PL intensities respond sensitively to the presence of substituents in the ortho or meta positions. In gold aryloxides, PL is controlled by steric factors, with strong luminescence in compounds with Au-O-C-C torsion angles <508. Calculations confirm the dependence of oscillator strength on the torsion angle, as well as the inter-ligand charge transfer nature of the emission. The HOMO/LUMO energy levels were estimated based on first reduction and oxidation potentials.
机译：通过甲基，乙基和金刚烷基 - 取代的环状（烷基）（氨基）卡宾（CAAC）配体稳定的铜和金卤化物和伪卤化物配合物主要是固态的线性单体，没有嗜酸性Au··au相互作用。 （〜（et2）l）CuCl显示该系列中最高的光致发光量子产率（Plqy），70％。 〜（ME2）L和〜（ET2）L铜卤化铜复合物的光曝光显示S1→S0荧光，与理论一致，以及长期发射。单体（〜（me2）l）封闭夹是白色发射器，而二聚体[（〜（〜（〜（〜（〜（〜（〜 （〜（Ad）L）Mcl（m = Cu或Au）与酚芳酸（Ar = pH值，2,6-F_2C_6H_3，2,6-ME_2C_6H_3，3,5-TBU_2C_6H_3，2-TBU-5- MEC_6H_3，2-吡啶基），噻吩酚或芳族胺H_2NAR''（AR'= pH值，3,5-（CF_3）_2C_6H_3，C_6F_5，2-PY）得到相应的苯酚，噻吩醇酸盐和酰胺配合物。尽管发射波长仅受环替代模式的边际影响，但是PL强度敏感地响应邻或元位置中的取代基。在金芳氧化物中，PL由空间因子控制，具有强烈发光，具有Au-O-C-C扭转角度<508的化合物。计算确认振荡器强度对扭转角度的依赖性，以及发射的配体间电荷转移性质。基于第一减少和氧化潜力估计同源/卢米能量水平。

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