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TitleNLO chromophores containing dihydrobenzothiazolylidene and dihydroquinolinylidene donors with an azo linker: Synthesis and optical properties
Publication TypeJournal Article
Year of Publication2013
AuthorsAshraf, M., Teshome A., Kay A.J., Gainsford G.J., Bhuiyan M.D.H., Asselberghs I., and Clays K.
JournalDyes and Pigments
Pagination82 - 92
Date Published2013
ISSN01437208 (ISSN)
KeywordsAzo dyes, Chromophores, Diazonium salts, First hyperpolarizabilities, High nonlinear, Hyper-polarizability, NLO-chromophore, nonlinear optical chromophore, Nonlinear optical response, Nonlinear optics, Novel materials, Optical properties, X ray crystallography
AbstractWe report the synthesis of a series of nonlinear optical chromophores containing either a - dihydrobenzothiazolylidene or dihydroquinolinylidene donor with an azo linker. The results demonstrate the versatility of coupling a diazonium salt to a donoremethylidene nucleus in order to access novel materials with good thermal stabilities and high nonlinear optical responses. From hyper- Raleigh scattering studies it was found that the use of the well-known TCF acceptor yields the best performing chromophores, one of which has a dynamic first hyperpolarizability of 1900 × 10-30 esu at 800 nm. The results from this study suggest the use of pro-aromatic donors such as dihydrobenzothiazolylidene or dihydroquinolinylidene results in compounds with higher nonlinear optical responses than those containing donors based on either indoline or aniline. © 2013 Elsevier Ltd.

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