Single Photon Emission from a Dendrimer Containing Eight Perylene Diimide Chromophores

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doi:10.1071/CH04133

Single Photon Emission from a Dendrimer Containing Eight Perylene Diimide Chromophores

Toby D. M. Bell ^A, Satoshi Habuchi ^A, Sadahiro Masuo ^A ^D, Ingo Österling ^B, Klaus Müllen ^B, Phillip Tinnefeld ^C, Markus Sauer ^C, Mark van der Auweraer ^A, Johan Hofkens ^A ^E, Frans C. De Schryver ^A ^E

^A Department of Chemistry, Katholieke Universiteit Leuven, 3001 Heverlee, Belgium.
^B Max-Planck-Institut für Polymerforschung, 55128 Mainz, Germany.
^C Fakultät für Physik, Angewandte Laserphysik, und Laserspektroskopie, Universität Bielefeld, 33615 Bielefeld, Germany.
^D Current address: Department of Polymer Science & Engineering, Kyoto Institute of Technology, Kyoto 606-8585, Japan.
^E Corresponding authors. Email: Frans.Deschryver@chem.kuleuven.ac.be; Johan.Hofkens@chem.kuleuven.ac.be





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Australian Journal of Chemistry 57(12) 1169–1173 http://dx.doi.org/10.1071/CH04133
Submitted: 21 May 2004 Accepted: 19 August 2004 Published online: 8 December 2004

Abstract

A novel dendrimer containing eight perylene diimide chromophores has been synthesized and studied by ensemble and single-molecule spectroscopic techniques. Photon anti-bunching (coincidence) measurements on single molecules embedded in zeonex polymer films show that the dendrimer behaves as a deterministic (triggered) single photon source with only one fluorescence photon being emitted following pulsed laser excitation, even when more than one chromophore is excited. This behaviour is due to efficient singlet–singlet annihilation being operative in this dendrimer. Preliminary results indicate that the triplet lifetime and yield for this molecule are similar to the values for a molecule containing a single perylene diimide chromophore.