• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics >Modulating the Near-Infrared Luminescence of Neodymium and Ytterbium Complexes with Tridentate Ligands Based on Benzoxazole-Substituted 8-Hydroxyquinolines
【24h】

Modulating the Near-Infrared Luminescence of Neodymium and Ytterbium Complexes with Tridentate Ligands Based on Benzoxazole-Substituted 8-Hydroxyquinolines

机译：基于苯并恶唑取代的8-羟基喹啉的三齿配体调节钕和Y配合物的近红外发光

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

An improved synthesis of 2-(2'-benzothiazole)- and 2-(2'-benzoxazole)-8-hydroxyquinoline ligands that combine a tridentate N,N,O-chelating unit for metal binding and extended chromophore for light harvesting is developed. The 2-(2'-benzoxazole)-8-hydroxyquinoline ligands form mononuclear nine-coordinate complexes with neodymium, INd( K3-ligandb], and an eight-coordinate complex with ytterbium, [Yb(K3-ligandh' (K1-ligand)· H20], as verified by crystallographic characterization offive complexes with four different ligands. The chemical stability ofthe complexes increases when the ligand contains 5,7-dihalo-8-hydroxyquinoline versus an 8-hydroxyquil1oline group. The complexes feature a ligand-centered visible absorption band with a maximum at 508-527 nm and an intensity of (7.5-9.6) x 103 M-1 .crn". Upon excitation with UV and visible light within ligand absorption transitions, the complexes display characteristic lanthanide luminescence in the near-infrared at850-1450 nm with quantum yields and lifetimes in the solid state at room temperature as high as 0.33% and 1.88 us; respectively. The lanthanide luminescence in the complexes is enhanced upon halogenation of the 5,7- positions in the 8-hydroxyquinoline group and upon the addition of electron-donating substituents to the benzoxazole ring. Facile modification of chromophore units in 2-(2'-benzoxazole)-8-hydroxyquinoline ligands provides means for controlling the luminescence properties of their lanthanide complexes.
机译：开发了一种改进的2-（2'-苯并噻唑）-和2-（2'-苯并恶唑）-8-羟基喹啉配体的合成方法，该配体结合了用于金属结合的三齿N，N，O螯合单元和用于光收集的扩展生色团。 2-（2'-苯并恶唑）-8-羟基喹啉配体与钕INd（K3-ligandb）形成单核九配位配合物，与[[Yb（K3-ligandh'（K1-ligand ）·H20]，经具有四个不同配体的配合物的晶体学表征证实，当配体包含5,7-二卤代8-羟基喹啉对8-羟基喹啉基时，该配合物的化学稳定性提高。可见光吸收带，最大吸收波长为508-527 nm，强度为（7.5-9.6）x 103 M-1 .crn“。在配体吸收跃迁中被紫外线和可见光激发后，配合物在附近显示出镧系元素发光于850-1450 nm处的红外光谱，室温下的量子产率和在固态下的寿命分别高达0.33％和1.88 us;配合物中的5,7-位卤化后，配合物中的镧系元素发光得以增强。羟基喹啉e基团和给苯并恶唑环上加给电子的取代基。 2-（2'-苯并恶唑）-8-羟基喹啉配体中发色团单元的轻松修饰为控制其镧系元素络合物的发光性质提供了手段。

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：[email protected]

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

OSZAR »