Antibunching in the emission of a single tetrachromophoric dendritic system

被引：112

作者：

Tinnefeld, P

Weston, KD

Vosch, T

Cotlet, M

Weil, T

Hofkens, J

Müllen, K

De Schryver, FC

Sauer, M

机构：

[1] Katholieke Univ Leuven, Dept Chem, B-3001 Heverlee, Belgium

[2] Univ Heidelberg, Inst Phys Chem, D-69120 Heidelberg, Germany

[3] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 48期

关键词：

D O I：

10.1021/ja027343c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photophysics of a dendrimer containing four chromophores are investigated at the single-molecule level. First, the multichromophoric character of single dendrimers' absorption is probed by modulating the linear polarization of the excitation beam. Subsequently, using circular polarization, the same dendrimers are excited, and their fluorescence transients are recorded. Using pulsed excitation in combination with the classical Hanbury-Brown and Twiss coincidence setup the presented data demonstrate that efficient singlet-singlet annihilation ensures that always only one photon is emitted even when several excitations are generated in an individual multichromophoric molecule. Copyright © 2002 American Chemical Society.

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页码：14310 / 14311

页数：2

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