| Literature DB >> 19582272 |
Marta Susana Díaz1, Mónica Liliana Freile, María Isela Gutiérrez.
Abstract
Spectral and photophysical properties of the alkaloid berberine (B) were studied in solvents with different solvent parameters, using UV/Vis absorption, emission and excitation spectroscopy. The absorption and emission maxima were found to be between 421-431 nm and 514-555 nm, respectively, leading to Stokes' shifts between 4099 and 5735 cm(-1). The fluorescence quantum yields varied between 10(-2)-10(-4), depending on the solvent. Different solvent scales have been used to study the solvatochromism of B. Linear solvation energy relationships (LSER) proposed by Kamlet-Taft suggest that B is a molecule attractive as a probe for solvent polarity and hydrogen bonding properties.Entities:
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Year: 2009 PMID: 19582272 DOI: 10.1039/b822363g
Source DB: PubMed Journal: Photochem Photobiol Sci ISSN: 1474-905X Impact factor: 3.982