提出一种简单的策略来产生可调荧光共振能量转移发射效率：将中等极性敏感的分子内电荷转移发射与荧光共振能量转移交织在一起。

Implication toward a simple strategy to generate efficiency-tunable fluorescence resonance energy transfer emission: intertwining medium-polarity-sensitive intramolecular charge transfer emission to fluorescence resonance energy transfer.

机构信息

Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Calcutta-700009, India.

出版信息

J Phys Chem A. 2010 May 27;114(20):6097-102. doi: 10.1021/jp101862w.

PMID:20443538

Abstract

The present contribution describes a unique strategy to produce tunable Fluorescence Resonance Energy Transfer (FRET) emission only as a function of medium properties through the implementation of Intramolecular Charge Transfer (ICT) reaction as the donor counterpart. Solvent sensitive emission (and quantum yield, Phi(D)) of N,N-dimethylaminonaphthylacrylonitrile (DMANAN) (donor) leads to modulation of spectral overlap (J(lambda)) between donor emission and acceptor (Acridine orange (AO)) absorption spectra whereby yielding differential FRET efficiency in various solvents, i.e., intertwining of two photoprocesses viz. ICT and FRET results in realization of the claimed process in the title.

摘要

本研究提出了一种独特的策略，通过引入分子内电荷转移（ICT）反应作为供体部分，仅根据介质性质产生可调谐的荧光共振能量转移（FRET）发射。N,N-二甲基氨基萘基丙烯腈（DMANAN）（供体）的溶剂敏感发射（和量子产率，Φ(D)）导致供体发射和受体（吖啶橙（AO））吸收光谱之间的光谱重叠（J(λ））的调制，从而在不同溶剂中产生不同的 FRET 效率，即 ICT 和 FRET 两个光过程的交织导致了标题中所声称的过程的实现。