Díaz Marta Susana, Freile Mónica Liliana, Gutiérrez María Isela
Departamento de Química, Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, 9000, Comodoro Rivadavia, Argentina.
Photochem Photobiol Sci. 2009 Jul;8(7):970-4. doi: 10.1039/b822363g. Epub 2009 Apr 27.
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.
使用紫外/可见吸收光谱、发射光谱和激发光谱，在具有不同溶剂参数的溶剂中研究了生物碱黄连素（B）的光谱和光物理性质。发现吸收和发射最大值分别在421 - 431 nm和514 - 555 nm之间，导致斯托克斯位移在4099至5735 cm⁻¹之间。荧光量子产率在10⁻² - 10⁻⁴之间变化，具体取决于溶剂。已使用不同的溶剂标度来研究B的溶剂化显色现象。Kamlet - Taft提出的线性溶剂化能关系（LSER）表明，B是一种有吸引力的分子，可作为溶剂极性和氢键性质的探针。
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