1024016-83-8Relevant academic research and scientific papers
Photostability of D-π-A nonlinear optical chromophores containing a benzothiazolium acceptor
Cigan, Marek,Gaplovsky, Anton,Sigmundova, Ivica,Zahradnik, Pavol,Dedic, Roman,Hromadova, Magdalena
supporting information; experimental part, p. 450 - 459 (2012/01/03)
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 res
Synthesis and study of novel benzothiazole derivatives with potential nonlinear optical properties
Sigmundova, Ivica,Zahradnik, Pavol,Loos, Dusan
, p. 1069 - 1093 (2008/12/22)
The synthesis of new benzothiazole push-pull systems as candidates for NLO-phores is described. Spectral (UV/VIS and solvatochromic) and theoretical studies (electronic properties based on semiempirical AM1 and PM3 methods) of the prepared compounds were carried out. The structure and physico-chemical parameters affecting the push-pull character and intramolecular charge transfer (ICT) of the studied compounds have been investigated and compounds with enhanced hyperpolarizability β have been predicted. The benzothiazolium salts were found to be much more effective NLO-phores in comparison with the corresponding neutral benzothiazoles. The 4-NPh2 group is the most effective donor. The extension of conjugated bridge improves the studied NLO characteristics. An additional acceptor group bonded to the heterocycle causes a red shift of λmax but does not increase hyperpolarizability.
