Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science

Luminescence Modulation with Semiconductor Quantum Dots and Photochromic Ligands

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

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

B Corresponding author. Email:

Australian Journal of Chemistry 59(3) 175-178
Submitted: 2 December 2005  Accepted: 29 January 2006   Published: 24 March 2006


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.


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