...
  • 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 >No aggregation-induced-emission but quenching of phosphorescence for an iridium complex with a 2,2-diphenylvinyl motif: a joint experimental and theoretical study
【24h】

No aggregation-induced-emission but quenching of phosphorescence for an iridium complex with a 2,2-diphenylvinyl motif: a joint experimental and theoretical study

机译：没有聚集诱导的排放，但用2,2-二苯基乙烯基基序搅拌铱络合物的磷光：一个联合实验和理论研究

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

The diphenylvinyl motif with rotary phenyl rings has been widely used as a building block for the construction of luminescent materials with aggregation-induced emission (AIE) properties. Here, we report the use of 2,2-diphenylvinyl in an iridium complex and its influence on the luminescence properties of the complex. Surprisingly, the 2,2-diphenylvinyl motif attached to the cyclometalating ligand brings about no AIE; instead, it completely quenches the phosphorescence from the iridium complex in solution or films at room temperature or at 77 K. Hydrogenation of the vinyl group in 2,2-diphenylvinyl recovers the phosphorescence. Theoretical calculations reveal that in the lowest triplet state of the complex, the 2,2-diphenylvinyl motif undergoes a significant structural change; as a result, the spin-density in the lowest triplet state distributes almost exclusively on the triphenylethene moiety of the cyclometalating ligand, with little distribution on the iridium ion, leading to complete quenching of phosphorescence. This work reveals that introduction of conjugated molecular motifs with rotational groups (such as 2,2-diphenylvinyl) into iridium complexes should be carefully treated, because it could quench the phosphorescence rather than inducing AIE, which provides a guideline for the design of AIE phosphors based on transition metal complexes.
机译：具有旋转苯环的二苯基乙烯基图案已被广泛用作构建具有聚集诱导的发射（AIE）性质的发光材料的构建块。在此，我们报告使用铱络合物中的2,2-二苯基乙烯基及其对复合物的发光性质的影响。令人惊讶的是，连接在环荷酸荷芳配体上的2,2-二苯基乙烯基基序带来了没有AIE;相反，它完全淬灭铱络合物在室温下的溶液或薄膜中的磷光，或者在77k处。在2,2-二苯基乙烯基中的乙烯基氢化蒸发磷光。理论计算表明，在复合物的最低三重态状态下，2,2-二苯基乙烯基基序经历了显着的结构变化;结果，最低三重态状态下的旋转密度几乎分布在环荷酸琥珀酸配体的三苯基乙烯部分上，在铱离子上具有很小的分布，导致磷光的完全猝灭。该工作表明，应仔细处理用旋转基团（如2,2-二苯基乙烯基）将共轭分子基序引入铱络合物中，因为它可以终止磷光而不是诱导AIE，这为AIE磷光体的设计提供了指导性基于过渡金属配合物。

著录项

  • 来源
  • 作者

    Chen Mengzhen; Lan Ying; Zheng Jiqing; Pan Fangfang; Song Xiangzhi; He Lei;

  • 作者单位

    Cent China Normal Univ Hubei Int Sci &

    Technol Cooperat Base Pesticide &

    Key Lab Pesticide &

    Chem Biol Coll Chem Minist Educ Wuhan 430079 Hubei Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Hunan Peoples R China;

    Cent S Univ Powder Met Res Inst Changsha 410083 Hunan Peoples R China;

    Cent China Normal Univ Hubei Int Sci &

    Technol Cooperat Base Pesticide &

    Key Lab Pesticide &

    Chem Biol Coll Chem Minist Educ Wuhan 430079 Hubei Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Hunan Peoples R China;

    Cent China Normal Univ Hubei Int Sci &

    Technol Cooperat Base Pesticide &

    Key Lab Pesticide &

    Chem Biol Coll Chem Minist Educ Wuhan 430079 Hubei Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;无机化学;
  • 关键词

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