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Photostability of D–π–A nonlinear optical chromophores containing a benzothiazolium acceptor
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SYSNO ASEP 0359974 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Photostability of D–π–A nonlinear optical chromophores containing a benzothiazolium acceptor Author(s) Cigáň, M. (SK)
Gáplovský, A. (SK)
Sigmundová, I. (SK)
Zahradník, P. (SK)
Dědic, R. (CZ)
Hromadová, Magdaléna (UFCH-W) RID, ORCID, SAISource Title Journal of Physical Organic Chemistry. - : Wiley - ISSN 0894-3230
Roč. 24, č. 6 (2011), s. 450-459Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords photooxidation ; photostability ; singlet oxygen Subject RIV CG - Electrochemistry R&D Projects GA203/08/1157 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000291361200003 DOI 10.1002/poc.1782 Annotation For the practical application of second-order NLO materials, not only a high molecular quadratic hyperpolarizability β but also good thermal, chemical, and photochemical stabilities are required. Most of the state-of-the-art chromophores with high NLO response cannot be put to use because they are photochemically highly unstable. Good thermal and photochemical stabilities with preserved high hyperpolarizabilities can be achieved by replacement of an aromatic ring with easily delocalizable heteroaromatics, e.g., with benzothiazole. Furthermore, desirable modifications of the benzothiazole fragment lead to improvement in β values. Here we report results of a comprehensive investigation of the photochemical stability of seven D–π–A push–pull molecules based on a N-methylbenzothiazolium acceptor and a N,N-dimethylaminophenyl donor with a different length of conjugated bridge and different acceptor strength. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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