Department of Chemistry, Lahore College for Women University, Lahore, Pakistan.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Apr;75(4):1341-6. doi: 10.1016/j.saa.2009.12.083. Epub 2010 Jan 6.
Quantitative parameters for interaction of flavonoids-the naturally occurring antioxidants, with solvents and surfactants are determined using UV-visible absorption spectroscopy. The availability of flavonoids; kaempferol, apigenin, kaempferide and rhamnetin in micelles of sodium dodecyl sulfate (SDS) is reflected in terms of partition coefficient, K(c). Thermodynamic calculations show that the process of transfer of flavonoid molecules to anionic micelles of SDS is energy efficient. A distortion in flavonoid's morphology occurs in case of kaempferol and apigenin in surfactant and water, exhibited in terms of a new band in the UV region of electronic spectra of these flavonoids. The partition coefficients of structurally related flavonoids are correlated with their antioxidant activities.
使用紫外-可见吸收光谱法测定了黄酮类化合物（天然抗氧化剂）与溶剂和表面活性剂相互作用的定量参数。黄酮类化合物——山柰酚、芹菜素、山柰苷和鼠李糖苷在十二烷基硫酸钠（SDS）胶束中的可用性反映在分配系数 K(c)上。热力学计算表明，黄酮类化合物分子向 SDS 阴离子胶束的转移过程是节能的。在表面活性剂和水中，山柰酚和芹菜素的黄酮形态发生扭曲，表现在这些黄酮类化合物的电子光谱的紫外区域出现新的谱带。结构相关的黄酮类化合物的分配系数与其抗氧化活性相关。
