Radiative and nonradiative deexcitation of pigments from natural oils

J. Łukasiewicz, A. Dudkowiak, H. Pienkowska, D. Frąckowiak
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引用次数: 2

Abstract

The absorption, steady state photoacoustic, fluorescence emission and excitation spectra of unbleached oils obtained by pressing the seeds of: evening primrose, borage, rape and viper's burgloss have been taken. Results obtained for samples under air and washed by nitrogen have been compared. In order to establish the occurrence of the slow thermal processes usually related to very photochemically active triplet states, the thermal deactivation in the absorption regions of carotenoids and the pheophytins has been observed at various frequencies of acting light modulations. The interactions between oil pigments are discussed. The generation of triplet states of dyes and singlet oxygen production in oils with different content of carotenoids and pheophytins is evaluated.
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天然油脂中色素的辐射和非辐射去激发
测定了月见草、琉璃苣、油菜和刺花籽压榨后得到的未漂白油的吸收光谱、稳态光声光谱、荧光发射光谱和激发光谱。对空气和氮气洗涤样品的结果进行了比较。为了确定通常与非常光化学活性的三重态有关的慢热过程的发生,在不同频率的作用光调制下观察到类胡萝卜素和叶绿素的吸收区热失活。讨论了颜料之间的相互作用。研究了不同类胡萝卜素和叶绿素含量的油脂中染料三重态的生成和单线态氧的生成。
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