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Synfacts 2011(10): 1079-1079  
DOI: 10.1055/s-0030-1261151
Synthesis of Materials and Unnatural Products
© Georg Thieme Verlag Stuttgart ˙ New York

Photochromism in Reverse

Contributor(s): Timothy M. Swager
P. Peng, D. Strohecker, Y. Liao*
University of Central Florida, Orlando, USA
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Publication History

Publication Date:
20 September 2011 (online)

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Significance

The vast majority of photochromic compounds display behavior wherein the thermodynamic (dark) state is colorless or less colored (high band gap) than the photochemically generated state. This simple system creates well-known spiropyran structures that display the opposite behavior. The compounds are readily prepared and show good reversibility in their photochromic responses.