Electric Field Induced Fluorescence Modulation of Single Molecules in PMMA Based on Electron Transfer

International Journal of Molecular Sciences

Ruiyun Chen²  Yan Gao²  Guofeng Zhang²  Ruixiang Wu²  Liantuan Xiao¹ 

[1] State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China;

关键词: single-molecule fluorescence;    modulation;    external electric fields;    polarization;   

DOI  :  10.3390/ijms130911130

来源: mdpi

【 摘 要 】

We present a method to modulate the fluorescence of non-polar single squaraine-derived rotaxanes molecules embedded in a polar poly(methyl methacrylate) (PMMA) matrix under an external electric field. The electron transfer between single molecules and the electron acceptors in a PMMA matrix contributes to the diverse responses of fluorescence intensities to the electric field. The observed instantaneous and non-instantaneous electric field dependence of single-molecule fluorescence reflects the redistribution of electron acceptors in PMMA induced by electronic polarization and orientation polarization of polar polymer chains in an electric field.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.