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Oertel, U. ; Dudkina, M.M. ; Komber, H. ; Pilch, B. ; Tenkovtsev, A.V. ; Böhme, F.
A spectroscopic study on the dissociation behavior of 4-hydroxybenzylideneacetone type NLO chromophores in the presence of sodium hydroxide

Interactions of phenolic and carboxylic groups containing NLO chromophores with NaOH in methanol were investigated by UV/vis, fluorescence and 1H NMR measurements. With the aid of a mathematical fitting procedure, it was possible to separate the single contributions of the differently charged chromophore molecules to the overall UV/vis spectra. Individual concentrations of the involved species in dependence on the NaOH concentration were calculated by approximation of measured and calculated UV/vis spectra.
The fully deprotonated chromophores with their higher extent of conjugation did not exhibit remarkable fluorescence while the 3rd order NLO activity was observed to show the opposite behavior.

Quelle
Optical Materials 29

Seiten
377-385

DOI
http://dx.doi.org/10.1016/j.optmat.2005.11.001

Erschienen am
November 2006
 
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