Počet záznamů: 1

Photostability of D–π–A nonlinear optical chromophores containing a benzothiazolium acceptor

  1. 1.
    0359974 - UFCH-W 2012 RIV GB eng J - Článek v odborném periodiku
    Cigáň, M. - Gáplovský, A. - Sigmundová, I. - Zahradník, P. - Dědic, R. - Hromadová, Magdaléna
    Photostability of D–π–A nonlinear optical chromophores containing a benzothiazolium acceptor.
    Journal of Physical Organic Chemistry. Roč. 24, č. 6 (2011), s. 450-459 ISSN 0894-3230
    Grant CEP: GA ČR GA203/08/1157
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: photooxidation * photostability * singlet oxygen
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 1.963, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0197641