Single Molecule Spectroscopy as a Probe for Dye-Polymer Interactions
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- 作者：Renaud A. L. Vallé ; e ; Philippe Marsal ; Els Braeken ; Satoshi Habuchi ; Frans C. De Schryver ; Mark Van der Auweraer ; David Beljonne ; and Johan Hofkens
- 刊名：Journal of the American Chemical Society
- 出版年：2005
- 出版时间：August 31, 2005
- 年：2005
- 卷：127
- 期：34
- 页码：12011 - 12020
- 全文大小：472K
- 年卷期：v.127,no.34(August 31, 2005)
- ISSN：1520-5126
文摘
Experimental (Single Molecule Spectroscopy) and theoretical (quantum-chemical calculationsand Monte Carlo and molecular dynamics simulations) techniques are combined to investigate the behaviorand dynamics of a polymer-dye molecule system. It is shown that the dye molecule of interest (1,1'-dioctadecyl-3,3,3',3'-tetramethylindo-dicarbocyanine) adopts two classes of conformations, namely planarand nonplanar ones, when embedded in a poly(styrene) matrix. From an in-depth analysis of thefluorescence lifetime trajectories, the planar conformers can be further classified according to the waytheir alkyl side chains interact with the surrounding poly(styrene) chains.