• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Optical detection of small biomolecule thiamines at a micromolar level by highly luminescent lanthanide complexes with tridentate N-heterocyclic ligands
【24h】

Optical detection of small biomolecule thiamines at a micromolar level by highly luminescent lanthanide complexes with tridentate N-heterocyclic ligands

机译：具有三齿N-杂环配体的高发光镧系元素络合物光学检测微摩尔水平的小生物分子硫胺素

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 new series of lanthanide complexes Ln(H2L)(EtOH)(NO3)(3) (Ln = La (1), Ce (2), Pr (3), Nd (4), Sm (5), Eu (6), Gd (7), and Tb (8)) have been synthesized by a solution synthetic method, heating in a pyrex flask, from the self-assembly of lanthanide ions (Ln(3+)) with tridentate N-heterocyclic ligand 2,6-bis(5-methyl-1H-pyrazol-3-yl)pyridine (H2L). These complexes were characterized by elemental analysis, IR spectra, powder X-ray diffraction (PXRD), single-crystal X-ray diffraction, thermal gravimetric analysis (TG) and luminescence spectra. In particular, the complexes Eu(H2L)(EtOH)(NO3)(3) (6) and Tb(H2L)(EtOH)(NO3)(3) (8) emit strong luminescence with high efficiency. Based on the luminescent properties of the lanthanide complexes, we found that very fast and extremely sensitive optical detection of the thiamines can be achieved for the first time, using the better performing luminescent sensing materials. The quenching constant (K-SV) of complex 6 was 9.08 x 10(5) M-1 for TPP, 4.90 x 10(5) M-1 for TMP, and 4.17 x 10(5) M-1 for TCl. The K-SV of complex 8 was 1327 M-1 for TPP, 149 M-1 for TMP, and 132 M-1 for TCl. The lower detection limit of complex 6 was 0.029 mu M for TPP, 0.027 mu M for TMP, and 0.028 mu M for TCl, and the highest quenching efficiency was 99.92% for TPP, 99.85% for TMP and 99.82% for TCl. For complex 8, the lower detection limit was 0.090 mu M for TPP, 0.278 mu M for TMP, and 0.263 mu M for TCl, and the highest quenching efficiency was 86% for TPP, 38% for TMP and 35% for TCl. The greater K-SV values, the lower detection limits, and the higher quenching efficiencies revealed extremely high sensitivity, showing both complexes 6 and 8 to be some of the best sensitive luminescence based metal-organic detectors of TPP, TMP and TCl. In the meantime, possible energy transfer mechanisms are discussed.
机译：一系列镧系元素络合物Ln（H2L）（EtOH）（NO3）（3）（Ln = La（1），Ce（2），Pr（3），Nd（4），Sm（5），Eu（6） ），Gd（7）和Tb（8））已通过溶液合成方法在吡咯烧瓶中加热，由三齿N-杂环配体2的镧系离子（Ln（3+））自组装而成。 ，6-双（5-甲基-1H-吡唑-3-基）吡啶（H2L）。这些配合物通过元素分析，红外光谱，粉末X射线衍射（PXRD），单晶X射线衍射，热重分析（TG）和发光光谱进行表征。特别是，Eu（H2L）（EtOH）（NO3）（3）（6）和Tb（H2L）（EtOH）（NO3）（3）（8）的配合物发出强发光且高效。基于镧系元素配合物的发光特性，我们发现，使用性能更好的发光传感材料，可以首次实现对硫胺素的非常快速和极其灵敏的光学检测。对于TPP，复合物6的猝灭常数（K-SV）为9.08×10（5）M-1，对于TMP为4.90×10（5）M-1，对于TC1为4.17×10（5）M-1。对于TPP，络合物8的K-SV为1327 M-1，对于TMP为149 M-1，对于TC1为132 M-1。配合物6的最低检测限为TPP为0.029μM，TMP为0.027μM，TCI为0.028μM，最高猝灭效率为TPP为99.92％，TMP为99.85％和TCI为99.82％。对于配合物8，TPP的下限为0.090μM，TMP的下限为0.278μM，TCI的下限为0.263μM，TPP的最高猝灭效率为86％，TMP为38％，TCl为35％。较大的K-SV值，较低的检测限和较高的淬灭效率显示出极高的灵敏度，表明配合物6和8都是TPP，TMP和TCl的最佳的基于发光的金属有机检测器。同时，讨论了可能的能量传递机制。

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