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采用脉冲辐解瞬态吸收光谱法研究了水溶液中水合电子弓1发cis-syn型1,3-二甲基尿嘧啶环丁烷型二聚体(DMUD)裂解、生成嘧啶单体和嘧啶阴离子自由基,以及在核黄素(RF)和黄素腺嘌吟二核苷酸(FAD)存在下,尿嘧啶阴离子自由基和RF及FAD之间的电子转移反应过程,测定了电子转移反应的速率常数。当没有RF或FAD作为电子受体时,尿嘧啶阴离子自由基能继续和DMUD反应,即进行链反应。
The photoluminescence transient absorption spectroscopy was used to study the cleavage of cis-syn 1,3-dimethyluracil cyclobutane dimer (DMUD) hydrated electron bridge in aqueous solution to generate pyrimidine and pyrimidine anions Free radicals, and electron transfer reactions between uracil anion radicals and RF and FAD in the presence of riboflavin (RF) and flavin adenine dinucleotide (FAD) Rate constant. When RF or FAD is absent as an electron acceptor, uracil anion radicals can continue to react with DMUD, ie undergo a chain reaction.