【24h】

Proton-Transfer-Induced Fluorescence in Self-Assembled Short Peptides

机译:自组装短肽中的质子转移诱导的荧光

获取原文
获取原文并翻译 | 示例
           

摘要

We employ molecular dynamics (MD) and time-dependent density functional theory (TDDFT) to explore the fluorescence of hydrogen-bonded dimer and trimer structures of cyclic FF (Phe-Phe) molecules. We show that in some of these configurations a photon can induce either an intra-molecular proton transfer, or an inter-molecular proton transfer that can occur in the excited Si and S2 states. This proton transfer, taking place within the hydrogen bond, leads to a significant red-shift that can explain the experimentally observed visible fluorescence in biological and bioinspired peptide nanostructures with a beta-sheet biomolecular arrangement. Finally, we also show that such proton transfer is highly sensitive to the geometrical bonding of the dimers and trimers and that it occurs only in specific configurations allowed by the formation of hydrogen bonds.
机译:我们采用分子动力学(MD)和时间依赖性密度泛函理论(TDDFT)来探讨氢键合二聚体和微循环FF(PHE-PHE)分子的三聚体结构的荧光。 我们表明,在这些配置中的一些配置中,光子可以诱导分子内质子转移,或者可以在激发的Si和S2状态中发生的分子间质子转移。 在氢键内发生这种质子转移,导致具有β-片生物分子布置的生物和生物透明肽纳米结构中的实验观察到的可见荧光的显着的红移。 最后,我们还表明,这种质子转移对二聚体和三聚体的几何结合非常敏感,并且其仅在通过形成氢键允许的特定配置中发生。

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