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Paper | Regular issue | Vol 60, No. 4, 2003, pp.843-855
Published online, 17th February, 2003
DOI: 10.3987/COM-02-9692
Control of the Fading Properties of Photochromic 3,3-Diaryl-3H-naphtho[2,1-b]pyrans

Christopher D. Gabbutt, B. Mark Heron,* and Alicia C. Instone

*Department of Colour Chemistry, The University of Leeds, Leeds, LS2 9JT, U.K.

Abstract

The synthesis and spectroscopic properties of some novel photochromic 3H-naphtho[2,1-b]pyrans are reported. Varying the size of an ortho-substituent on one of the geminal aryl rings allows the rate of fade of the photogenerated color to be controlled.