Reaction dynamics between the photonuclease triplet- excited vitamin-K3 and gua-nine nucleotide  

作　　者：ZHANGHuijuan LIManyu WANGPeng FENGJuan WANGLi AIXicheng ZHANGXingkang ZHANGJianping 

机构地区：[1]StateKeyLaboratoryforStructuralChemistryofUnstableandStableSpecies.InstituteofChemistry.ChineseAcademyofSciences,Beijing100080.China [2]CenterforCondensedMatterPhysics,InstituteofPhysics.ChineseAcademyofSciences,Beijing100080,China

出　　处：《Chinese Science Bulletin》2004年第20期2144-2147,共4页

摘　　要：Nanosecond laser pulse photolysis was used to investigate the excited-state dynamics of the photonuclease vitamin-K3 (VK3). A spectral band peaked at 285 nm was newly observed and attributed to the triplet-excited state of VK3. In studying the photochemistry between the photonu-clease VK3 and guanine nucleotide (dGMP), we obtained spectroscopic evidence for the photo-initiated formation of both VK3 radical anion and dGMP radical cation, and thus proved the charge transfer reaction between the trip-let-excited VK3 and the ground-state dGMP.Nanosecond laser pulse photolysis was used to investigate the excited-state dynamics of the photonuclease vitamin-K3 (VK3). A spectral band peaked at 285 nm was newly observed and attributed to the triplet-excited state of VK3. In studying the photochemistry between the photonu-clease VK3 and guanine nucleotide (dGMP), we obtained spectroscopic evidence for the photo-initiated formation of both VK3 radical anion and dGMP radical cation, and thus proved the charge transfer reaction between the trip-let-excited VK3 and the ground-state dGMP.

关 键 词：反应动力学 光核酸酶 三重激发 维生素K3 鸟嘌呤核甘 电荷转移 

分 类 号：Q525[生物学—生物化学] Q568