Novel Photochromic Spiro[Thioxanthene-Naphthopyrans] with Faster Bleaching Kinetics

Erica   Fontes   Silva; Paulo   J.   Coelho

doi:10.2174/157017808785740417

Abstract

Novel spiro[thioxanthene-naphthopyrans] were prepared and their photochromic properties in solution investigated under UV-Vis continuous irradiation. When compared to known similar naphthopyrans these new compounds showed a significant bathochromic shift of the maximum wavelength of absorption and faster ring closure kinetics.

Keywords: Photochromism, naphthopyran, spiro compounds, kinetics, UV irradiation, heterocycles

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Letters in Organic Chemistry

Title: Novel Photochromic Spiro[Thioxanthene-Naphthopyrans] with Faster Bleaching Kinetics

Volume: 5 Issue: 6

Author(s): Erica Fontes Silva and Paulo J. Coelho

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Keywords: Photochromism, naphthopyran, spiro compounds, kinetics, UV irradiation, heterocycles

Abstract: Novel spiro[thioxanthene-naphthopyrans] were prepared and their photochromic properties in solution investigated under UV-Vis continuous irradiation. When compared to known similar naphthopyrans these new compounds showed a significant bathochromic shift of the maximum wavelength of absorption and faster ring closure kinetics.

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Silva Fontes Erica and Coelho J. Paulo, Novel Photochromic Spiro[Thioxanthene-Naphthopyrans] with Faster Bleaching Kinetics, Letters in Organic Chemistry 2008; 5 (6) . https://dx.doi.org/10.2174/157017808785740417