title: 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.
abstract: For fluorescent compounds, the combined use of absorption and emission solvatochromic data allows to estimate indirectly the cavity radius of the molecule in solution, a very critical parameter in the application of the solvatochromic method for the determination of the quadratic hyperpolarizability beta of dipolar molecules. For two test compounds, trans-4-[4-(dimethylamino)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 more than one electronic transition contributing to the non-linear optical response is demonstrated.
authors.affiliation: Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università degli Studi di Milano, Italy. sbruni@csmtbo.mi.cnr.it
authors.forename: S
authors.initials: S
authors.lastname: Bruni
authors.forename: E
authors.initials: E
authors.lastname: Cariati
authors.forename: F
authors.initials: F
authors.lastname: Cariati
authors.forename: F A
authors.initials: FA
authors.lastname: Porta
authors.forename: S
authors.initials: S
authors.lastname: Quici
authors.forename: D
authors.initials: D
authors.lastname: Roberto
mesh_terms: D000042:Absorption; D002627:Chemistry, Physical / Q000379:methods*; D010618:Phenanthrolines / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: C442849:4-(4-(dimethylamino)styryl)pyridine; C442850:5-dimethylamino-1,10-phenanthroline; D010618:Phenanthrolines; D011725:Pyridines