• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Photophysics of crystal violet lactone in reverse micelles and its dual behaviour
【24h】

Photophysics of crystal violet lactone in reverse micelles and its dual behaviour

机译：反胶束中结晶紫内酯的光物理性质及其双重行为

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

In this article, the photophysics of Crystal Violet Lactone (CVL) in aqueous and non-aqueous reverse micelles (RMs) have been explored using UV-vis absorption, steady-state emission and picosecond time-resolved fluorescence emission spectroscopic techniques. CVL exhibits dual emission bands (CTA and CTB states of CVL) in a polar aprotic solvent, whereas when this molecule is entrapped in the RMs, it exhibits a single emission band (CTA). In the case of all the RMs, the CTA --> CTB transformation is retarded due to the influence of polarity, viscosity and proticity. Moreover, in the case of viscous solvents (ethylene glycol and glycerol), a single emission band is found. The hydrogen-bond-donating solvent molecule also quenches the CTB emission band of CVL. This is the first report on the photophysics of the CVL molecule in biomimicking organised assemblies, in which the opposite spectral features were observed in the RMs at different excitation wavelengths. The average rotational relaxation time increases in the respective RMs compared to their respective solvent, with the exception of neat glycerol, wherein the rotation of CVL is practically hindered. In the case of EG and glycerol RMs, the rotational relaxation is even more retarded due to the gradual swelling of the RM cores. Herein, the hydrodynamic friction, coupled with the dielectric friction, causes such rotational motion to be quite slow.
机译：在本文中，已经使用紫外可见吸收，稳态发射和皮秒时间分辨荧光发射光谱技术研究了含水和非含水反胶束（RM）中的结晶紫内酯（CVL）的光物理性质。 CVL在极性非质子溶剂中显示双发射带（CVL的CTA和CTB状态），而当此分子被困在RMs中时，它显示一个单发射带（CTA）。在所有RM的情况下，由于极性，粘度和质子性的影响，CTA-> CTB转换受阻。此外，在粘性溶剂（乙二醇和甘油）的情况下，发现单个发射带。供氢键的溶剂分子还淬灭了CVL的CTB发射带。这是关于CVL分子在生物模拟有组织的装配中的光物理的第一份报告，其中在RMs中在不同激发波长下观察到相反的光谱特征。与它们各自的溶剂相比，各自的RM中的平均旋转弛豫时间增加，除了纯甘油外，其中实际上阻碍了CVL的旋转。在EG和甘油RMs的情况下，由于RM核逐渐膨胀，旋转弛豫甚至更加受阻。在此，流体动力摩擦与介电摩擦一起导致这种旋转运动相当慢。

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