Krasnovskiĭ A A
Biofizika. 1977 Sep-Oct;22(5):927-8.
With the use of mechanical phosphoroscopes the photoinduced luminescence of singlet oxygen (1270 nm) have been found in air saturated solutions of chlorophyll a, bacteriochlorophyll a, protochlorophyll and pheophytins in CCl4, CS2, and freon 112. The excitation spectra of the luminescence coincide with the absorption spectra of the pigments. The relative quantum yields of the luminescence are determined, the data are used for calculation the probablities of intersystem crossing in pigment molecules. All the pigments are shown to quench 1O2, the rate constants of the quenching are measured. The quenching efficiency of the chlorophylls increases with reduction of the semiisolated double bonds, reduction of these bonds in molecules of the pheophytins decreases the constants of the quenching.
通过使用机械荧光镜，在叶绿素a、细菌叶绿素a、原叶绿素和脱镁叶绿素于四氯化碳、二硫化碳和氟利昂112中的空气饱和溶液中发现了单线态氧（1270纳米）的光致发光。发光的激发光谱与色素的吸收光谱一致。测定了发光的相对量子产率，并将这些数据用于计算色素分子中系间窜越的概率。所有色素均显示能猝灭单线态氧，并测量了猝灭速率常数。叶绿素的猝灭效率随半隔离双键的减少而增加，脱镁叶绿素分子中这些双键的减少则降低了猝灭常数。
