量子点作为能量受体，有机染料作为供体，在溶液中。

Quantum dots acting as energy acceptors with organic dyes as donors in solution.

机构信息

Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China.

出版信息

Chemphyschem. 2010 Oct 4;11(14):3167-71. doi: 10.1002/cphc.201000287.

DOI:10.1002/cphc.201000287

PMID:20872922

Abstract

Quantum dots (QDs) usually act as energy donors in Förster resonant energy transfer (FRET) in various application fields. We report, for the first time, a FRET process from a conventional naphthalimide chromophore 1 to CdSe/ZnS core/shell QDs (acting as energy acceptors) in (1)-QDs hybrid system in solution. This FRET process is supported by various spectroscopies, such as steady-state and time-resolved photoluminescence (PL) as well as PL excitation spectra. The highest energy transfer efficiency is estimated to be about 0.37. Interestingly, the role of QDs in FRET can be specifically reversed (from energy acceptors to energy donors) with the use of QDs with larger band-gaps.

摘要

量子点（QDs）通常在各种应用领域中充当Förster 共振能量转移（FRET）的能量供体。我们首次报道了在溶液中的（1）-QDs 混合体系中，从传统的萘酰亚胺发色团 1 到 CdSe/ZnS 核/壳 QD（作为能量受体）的 FRET 过程。该 FRET 过程得到了各种光谱学的支持，例如稳态和时间分辨光致发光（PL）以及 PL 激发光谱。估计最高能量转移效率约为 0.37。有趣的是，通过使用具有更大能带隙的 QD，可以特异性地反转 QD 在 FRET 中的作用（从能量受体到能量供体）。