Single Boryl Isomerization in Silyl-Bridged Photochromic Diboryl Dyes

Silyl-bridged dimers of a ppy-BMes2 (ppy = 2-phenylpyridine, Mes = mesityl) photochrome were found to undergo photochromic switching involving a single boryl unit only. A through-space intramolecular energy transfer was found to be responsible for the single-chromophore isomerization phenomenon and...

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Bibliographic Details
Published in:Organic letters 2010-11, Vol.12 (22), p.5266-5269
Main Authors: Murphy, Stephen K, Baik, Chul, Lu, Jia-sheng, Wang, Suning
Format: Article
Language:English
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Summary:Silyl-bridged dimers of a ppy-BMes2 (ppy = 2-phenylpyridine, Mes = mesityl) photochrome were found to undergo photochromic switching involving a single boryl unit only. A through-space intramolecular energy transfer was found to be responsible for the single-chromophore isomerization phenomenon and fluorescence quenching. Steric congestion in the diboryl molecules was found to have an impact on photoisomerization quantum efficiency.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol102319t