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Introduction Electron transfer oxidation of DNAby triplet artifi-cial photonuclease reveals a bright prospect of its appli-cation in biology and medicine. Both molecular orbitalcalculation and laser experiments have indicated thatthe homo guanine sequence should be the final localiza-tion site of photoexcited holevialong range migrationwithin DNA[1—3]. However, the direct observation ofthe produced ion pairs of biomolecules especially thestabilized radical cation DNAor its components is ham-pered by the overwhelming transient absorption of pro-tonated radical anion of photosensitizers, such as2-methyl-1,4-naphthaguinonel(MQ).
Introduction Electron transfer oxidation of DNAby triplet artifi-cial photonuclease reveals a bright prospect of its appli-cation in biology and medicine. Both molecular orbitalcalculation and laser experiments have indicated that the homo guanine sequence should be the final localiza tion site of photoexcited holevialong range migrationwithin DNA [1-3]. However, the direct observation of the produced ion pairs of biomolecules especially the stabilized radical cation DNADNA its components is ham-pered by the overwhelming transient absorption of pro-tonated radical anion of photosensitizers, such as2-methyl-1, 4-naphthaguinonel (MQ).