富勒烯 C60 与香豆素 C440 之间的福斯特共振能量转移。

Förster's resonance energy transfer between Fullerene C60 and Coumarin C440.

机构信息

Department of Physics, Jamia Millia Islamia, New Delhi 110025, India.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2010 Dec;77(5):1065-8. doi: 10.1016/j.saa.2010.08.074.

DOI:10.1016/j.saa.2010.08.074

PMID:20869302

Abstract

The interaction between Coumarin C440 with Fullerene C60 has been studied by fluorescence and time resolved spectroscopic techniques. The Coumarin C440-Fullerene C60 pair shows Forster's resonance energy transfer (FRET) from Coumarin C440 (donor) to Fullerenes C60 (acceptor). The FRET efficiency of this pair increases with the increase of the acceptor concentration. The critical energy transfer distance (R0) at which transfer efficiency is 50% is found to be 34Ǻ. Stern-Volmer plot indicates static as well as dynamic quenching. However, the FRET studies show highest efficiency at the critical stage of dimer formation.

摘要

通过荧光和时间分辨光谱技术研究了香豆素 C440 与富勒烯 C60 之间的相互作用。香豆素 C440-富勒烯 C60 对显示出福斯特共振能量转移（FRET），从香豆素 C440（供体）到富勒烯 C60（受体）。该对的 FRET 效率随着受体浓度的增加而增加。发现转移效率为 50％的临界能量转移距离（R0）为 34Ǻ。Stern-Volmer 图表明存在静态和动态猝灭。然而，FRET 研究表明在二聚体形成的关键阶段效率最高。