摘要
利用纳秒级激光先解动态吸收光谱装置，研究鸟嘌呤衍生物及ＤＮＡ在碱性溶液中的光电离。首次发现鸟嘌呤衍生物及ＤＮＡ在碱性溶液中能被２４８ｕｍ激光单光子电离，确证了光电离发生在Ｎ１位脱质子的鸟嘌呤部分，测定了水合电子的量子产额。
The effects of 248 urn laser light on alkaline solutions of guanine(Gua), guanosine(Guo), 2'-deoxyguanosine-5'-monophos acid (dGMP), polyguanylic acid(5') (poly[Gj) and single-stranded DNA (ssDNA) were investigated,and monophotonic ionization was demonstrated. Based on PH titration, it wasconfirmed that the photoionization occurs on a deprotonated Gua moiety of DNA.The quantum yield of photoelectron was measured.
出处
《辐射研究与辐射工艺学报》
CSCD
北大核心
1996年第2期126-128,共3页
Journal of Radiation Research and Radiation Processing
基金
国家自然科学基金
关键词
鸟嘌呤
DNA
光电离
量子产额
辐射损伤
Guanine derivative
DNA. Photoionization
Monophotonicprocess
Quantum yield
