• 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 >Luminescence and structural properties of lanthanide complexes of Schiff bases derived from pyridoxal and amino acids
【24h】

Luminescence and structural properties of lanthanide complexes of Schiff bases derived from pyridoxal and amino acids

机译：吡ido醛和氨基酸衍生的席夫碱的镧系元素配合物的发光和结构性质

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

Lanthanide complexes of Schiff bases (SBs) with 1 : 1 and 1 : 2 ( M : Lig) stoichiometric ratios were prepared by condensation of pyridoxal (PL) and aspartic acid ( Asp) or L-histidine ( His), respectively, in the presence of the appropriate metal chloride as a templating agent. These complexes were studied by optical spectroscopy and single crystal X-ray diffraction techniques. Crystallographic studies of 1 : 1 ([Eu(PL-Asp)(H2O)(4)](H2O)) and 1 : 2 ([Eu(PL-His)(2)(H2O)(2)]Cl(H2O)(4)) complexes show that Eu-III is eight-coordinate in both structures, in a distorted square antiprism environment formed by the phenolic oxygen of PL, the nitrogen atom of carbon-nitrogen double bond, oxygen atoms of the carboxylate groups of His or Asp, and oxygen atoms of the water molecules. The main species formed in aqueous solutions containing these SBs have been determined by analysis of the luminescence spectra, lifetimes of EuIII excited states and vibronic interaction as well as structural features of the EuIII coordination sphere. Possible tetradentate coordination function of SBs in aqueous solutions with relatively high concentrations as well as the potential application of the lanthanide SB complexes as new luminescence materials are discussed.
机译：分别通过吡the醛（PL）和天冬氨酸（Asp）或L-组氨酸（His）缩合制备化学计量比为1：1和1：2（M：Lig）的席夫碱（SBs）的镧系元素络合物。存在适当的金属氯化物作为模板剂。这些配合物通过光谱学和单晶X射线衍射技术进行了研究。 1：1（[Eu（PL-Asp）（H2O）（4）]（H2O）和1：2（[Eu（PL-His）（2）（H2O）（2）] Cl（H2O）的晶体学研究）（4））的配合物表明，在PL的酚氧，碳氮双键的氮原子，羧酸的羧基的氧原子形成的扭曲的方形反棱镜环境中，Eu-III的两个结构均为八坐标。他或Asp，以及水分子中的氧原子。通过分析发光光谱，EuIII激发态的寿命和电子振动相互作用以及EuIII配位球的结构特征，可以确定在包含这些SB的水溶液中形成的主要物质。讨论了SBs在较高浓度水溶液中可能的四齿配位作用，以及镧系元素SB配合物作为新型发光材料的潜在应用。

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