MONOPHOTONIC IONIZATION OF GUANINE AND ITS DERIVATIVES AND DNA IN ALKALINE AQUEOUS SOLUTION BY 248 nm PULSED LASER LIGHT

Song Qinhua; Yao Side; Lin Nianyun

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MONOPHOTONIC IONIZATION OF GUANINE AND ITS DERIVATIVES AND DNA IN ALKALINE AQUEOUS SOLUTION BY 248 nm PULSED LASER LIGHT

更新时间：2023-04-26

- MONOPHOTONIC IONIZATION OF GUANINE AND ITS DERIVATIVES AND DNA IN ALKALINE AQUEOUS SOLUTION BY 248 nm PULSED LASER LIGHT
- Journal of Radiation Research and Radiation Processing Vol. 14, Issue 2, Pages: 126-128(1996)
- 作者机构：
  
  1.中国科学院辐射化学开放研究实验室，上海原子核研究所，上海 201800
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Song Qinhua, Yao Side, Lin Nianyun. MONOPHOTONIC IONIZATION OF GUANINE AND ITS DERIVATIVES AND DNA IN ALKALINE AQUEOUS SOLUTION BY 248 nm PULSED LASER LIGHT. [J]. Journal of Radiation Research and Radiation Processing 14(2):126-128(1996)
DOI：

Song Qinhua, Yao Side, Lin Nianyun. MONOPHOTONIC IONIZATION OF GUANINE AND ITS DERIVATIVES AND DNA IN ALKALINE AQUEOUS SOLUTION BY 248 nm PULSED LASER LIGHT. [J]. Journal of Radiation Research and Radiation Processing 14(2):126-128(1996) DOI：

摘要

利用纳秒级激光光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248 nm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（ϕ,e,-）。

Abstract

The effects of 248 nm laser light on alkaline solutions of guanine(Gua), guanosine(Guo), 2′-deoxyguanosine-5′-monophosphoric acid (dGMP), poly-guanylic acid(5′) (poly[G]) and single-stranded DNA (ssDNA) were investigated, and monophotonic ionization was demonstrated. Based on pH titration, it was confirmed that the photoionization occurs on a deprotonated Gua moiety of DNA. The quantum yield of photoelectron (ϕ,e,-)was measured.

关键词

鸟嘌呤DNA光电离单光子过程量子产额

Keywords

Guanine derivativeDNAPhotoionizationMonophotonic processQuantum yield

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