Nonlinear optical properties of 1-alkyl-4(2-benzimidazolylidene)-1,4-dihydropyridines and their Langmuir film formation

• Autorzy: Janik R. , Kucharski S. , Prędota J.
• Języki publikacji: EN

Abstrakty

EN

The nonlinear optical properties of a homologous series of heterocyclic betaines (1-alkyl-4(2-benzimidazolylidene)-1,4-dihydropyridines) with methtyl, n-butyl, n-octyl, n-dodecyl and n-hexadecyl alkyl groups were evaluated by determination of their first hyperpolarizability (beta) using solvatochromic method. The measurements showed that in static (beta(0)) and in external field (beta(1064)) first hyperpolarizability values for the betaines were 2.5-3.4 and 4-5 times higher than that for p-nitroaniline, respectively. The Langmuir monolayer formation of the compounds on aqueous surface was evaluated by the surface pressure (Pi) vs. molecular area per molecule (delta) isotherms. The betaines with n-dodecyl and n-hexadecyl chains were able to form a Langmuir film, although the shape of Pi-delta isotherms indicated that they would not be qualified as good film forming materials of single component films.

Słowa kluczowe

EN

heterocyclic betaines; NLO-phores; monolayer films; surface pressure

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 5
• Strony: 901--909
• Opis fizyczny: Bibliogr. 35 poz., tab. wykr.

Twórcy

autor

Janik R.

autor

Kucharski S.

autor

Prędota J.

• Institute of Organic and Polymer Technology Wrocław Technical University ul.Wyspiańskiego 27 50-370 Wracław Poland,