Determination of the quadratic hyperpolarizability of trans-4-[4-(dimethylamino)styryl]pyridine and 5-dimethylamino-1,10-phenanthroline from solvatochromism of absorption and fluorescence spectra: a comparison with the electric-field-induced second-harmonic generation technique
S. Bruni et al., Determination of the quadratic hyperpolarizability of trans-4-[4-(dimethylamino)styryl]pyridine and 5-dimethylamino-1,10-phenanthroline from solvatochromism of absorption and fluorescence spectra: a comparison with the electric-field-induced second-harmonic generation technique, SPECT ACT A, 57(7), 2001, pp. 1417-1426
Citations number
28
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
For fluorescent compounds, the combined use of absorption and emission solv
atochromic data allows to estimate indirectly the cavity radius of the mole
cule in solution, a very critical parameter in the application of the solva
tochromic method for the determination of the quadratic hyperpolarizability
beta of dipolar molecules. For two test compounds, trans-4-[4-(dimethylami
no)styryl]pyridine (DASP) and 5-dimethylamino-1, 10-phenanthroline (DAPHEN)
, the beta values so obtained are compared with those obtained by the EFISH
(Electric Field Induced Second-Harmonic generation) technique. For DAPHEN.
the versatility of the method described in this work in the presence of mo
re than one electronic transition contributing to the non-linear optical re
sponse is demonstrated. (C) 2001 Elsevier Science B.V. All rights reserved.