Luminescence Modulation with Semiconductor Quantum Dots and Photochromic Ligands

Massimiliano Tomasulo; Ibrahim Yildiz; Françisco M. Raymo

doi:10.1071/CH05332

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Luminescence Modulation with Semiconductor Quantum Dots and Photochromic Ligands

Massimiliano Tomasulo ^A , Ibrahim Yildiz ^A and Françisco M. Raymo ^A ^B

+ Author Affiliations

- Author Affiliations

^A Center for Supramolecular Science, Department of Chemistry, University of Miami, FL 33146-0431, USA.

^B Corresponding author. Email: fraymo@miami.edu

Australian Journal of Chemistry 59(3) 175-178 https://doi.org/10.1071/CH05332
Submitted: 2 December 2005 Accepted: 29 January 2006 Published: 24 March 2006

Abstract

We have attached a photochromic spiropyran to the surface of CdSe–ZnS core–shell quantum dots, relying on a dithiolane anchoring group. In the resulting assembly, the reversible interconversion of the photochromic component activates and suppresses an energy transfer pathway from the excited quantum dots to the coloured state of the ligand. As a result, the luminescence intensity decreases by 45% with the photoinduced colouration of the spiropyran and returns to the original value after the thermal reisomerization of the ligand.

Acknowledgments

We thank the National Science Foundation (CAREER Award CHE-0237578) and the University of Miami for financial support.

References

Luminescence Modulation with Semiconductor Quantum Dots and Photochromic Ligands

Abstract

Acknowledgments

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