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, 1996,14(2):126-128.
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, 1996,14(2):126-128.DOI:
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.