...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives
【24h】

Electrochemistry and Electrogenerated Chemiluminescence of Quinoxaline Derivatives

机译：喹喔啉衍生物的电化学和电化学发光

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

We report the electrochemistry, spectroscopy, and electrogenerated chemiluminescence (ECL) of donor—acceptor compounds containing a quinoxaline derivative as the central core coupled with fluorene (CFPQ, CFPP, and MFPQ) and triphenylamine moieties (MAPQ), Cyclic voltammetry of all four derivatives show reversible reduction waves (assigned to the formation of the radical anion) localized in the quinoxaline moiety (the acceptor group), whereas oxidation waves show behavior that depends upon the nature of the donor group. With a pair of strong donor groups, triphenylamine, (MAPQ), exhibits a two electron oxidation wave due to the two noninteracting donor moieties. The fluorene derivatives (CFPQ, CFPP, and MFPQ) show less reversible oxidation waves at scan rates of 100 mV/s, but CFPP and CFPQ become reversible at higher scan rates. In their absorbance and emission spectra, all of the compounds, except MFPQ, exhibit large Stokes shifts, which are related to the rearrangement of the excited-state and also to solvent effects. ECL was observed for MAPQ, CFPQ, and CFPP in MeCN/benzene solutions that generally agree with the photoluminescence spectra, suggesting that the energy of annihilation is sufficient to form singlet excited states (the S-route). The ECL of MAPQ was strong enough to be seen with the naked eye. MFPQ did not produce ECL, probably because of the instability of the radical cation.
机译：我们报告了供体-受体化合物的电化学，光谱学和电化学发光（ECL），该化合物包含喹喔啉衍生物作为中心核心，并带有芴（CFPQ，CFPP和MFPQ）和三苯胺部分（MAPQ），所有四个衍生物的循环伏安法显示出位于喹喔啉部分（受体基团）中的可逆还原波（归因于自由基阴离子的形成），而氧化波显示出取决于供体基团性质的行为。具有一对强供体基团，由于两个非相互作用的供体部分，三苯胺（MAPQ）表现出两个电子氧化波。芴衍生物（CFPQ，CFPP和MFPQ）在100 mV / s的扫描速率下显示出较少的可逆氧化波，但CFPP和CFPQ在较高的扫描速率下变为可逆的。在其吸收光谱和发射光谱中，除MFPQ外，所有化合物均表现出较大的斯托克斯位移，这与激发态的重排以及溶剂效应有关。在MeCN /苯溶液中观察到的MAPQ，CFPQ和CFPP的ECL通常与光致发光光谱一致，这表明an灭的能量足以形成单重激发态（S路径）。 MAPQ的ECL足够强大，可以用肉眼看到。 MFPQ没有产生ECL，可能是由于自由基阳离子的不稳定性。

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