The development of photochromic materials based on the photoinduced transfer of electrons from CdSe-ZnS core-shell quantum dots to bipyridinium dications, was analyzed. These quantum dots can efficiently mediate the transfer of electrons from sacrificial donors to bipyridinium acceptors upon visible irradiation. The photocoloration of the bipyridinium dications can be reversed in both instances by exposing the samples to molecular oxygen. The results show that the operating mechanism and choice of building blocks, can lead to the development of a new family of photochromic materials that can be operated with visible photons relying on the unique photophysical properties of semiconductor quantum dots.
ASJC Scopus subject areas
- Materials Chemistry