Kostikov A P, Sadovnikova N A, Evstigneev V B
Biofizika. 1976 Sep-Oct;21(5):803-7.
Photoinduced transfer of electrons in alkohol solutions of chlorophyll and its deuterated analog, deuterochlorophyll containing the quinoses: p-benzoquinone, chloranyl, duroquinone, 1,4-naftoquinone and ubiquinone (coenzyme Q6) is studied. It is shown that pigment cation-radical and quinone anion-radical are the primary products of photoreaction. A relationship between stationary concentrations of deuterochlorophyll and p-benzoquinone radicals and quinone concentration in solution is obtained. The reaction mechanism and causes of other authors' (G. Tollin et al.) failure in finding pigment cation-radicals which are formed in the reaction of the latter with quinoses are discussed. It is shown that optimal conditions for accumulating photoinduced cation-radicals of the pigment in pigment solutions of chlorophyll with quinones are lowered temperature, high viscosity of the solvent, low pH of the solution, careful purification of the quinone from hydroquinone admixture.
研究了叶绿素及其含醌类物质的氘代类似物脱镁叶绿素在醇溶液中的光致电子转移，其中醌类物质包括对苯醌、氯冉、杜醌、1,4 -萘醌和泛醌（辅酶Q6）。结果表明，色素阳离子自由基和醌阴离子自由基是光反应的主要产物。得出了脱镁叶绿素和对苯醌自由基的稳态浓度与溶液中醌浓度之间的关系。讨论了反应机理以及其他作者（G. Tollin等人）未能找到色素与醌类反应中形成的色素阳离子自由基的原因。结果表明，在叶绿素与醌的色素溶液中积累色素光致阳离子自由基的最佳条件是降低温度、提高溶剂粘度、降低溶液pH值以及仔细去除醌中的对苯二酚杂质。
