title: Solvent effect on the UV/Vis absorption and fluorescence spectroscopic properties of berberine.
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.
authors: Departamento de Química, Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, 9000, Comodoro Rivadavia, Argentina.
authors: Marta Susana
authors: MS
authors: Díaz
authors: Mónica Liliana
authors: ML
authors: Freile
authors: María Isela
authors: MI
authors: Gutiérrez
mesh_terms: D001599:Berberine / Q000737:chemistry*; D015394:Molecular Structure; D010777:Photochemistry; D012997:Solvents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D012997:Solvents; D001599:Berberine