利用纳秒级激光光解动态吸收光谱装置，研究了１，２－和１，４－萘醌中性水溶液的瞬态 吸收光谱。发现１， ２－萘醌及 １， ４－萘醌被光电离后形成的阳离子自由基在３８０ｎｍ均有最大吸 收，但１，４－萘醌阳离子自由基在衰变过程中又形成了两种新的活性粒子，它们的最大吸收分别位 于４１０和５８０ ｎｍ，分析表明：４１０ｎｍ属于１，４－萘醌脱氢自由基的吸收，而５８０ｎｍ很可能归属由于 电子转移而形成的瞬态产物。进一步研究发现， １， ２－萘醌在中性水溶液中能被 ２４８ｎｍ激光单光子 电离。 The nanosecond laser photodissociation dynamic absorption spectrometer was used to study the transient absorption spectra of neutral aqueous solutions of 1,2- and 1,4-naphthoquinone. It was found that the cationic radicals formed by photoionization of 1, 2-naphthoquinone and 1,4-naphthoquinone all have the maximum absorption at 380 nm, but the 1,4-naphthoquinone cation radical forms two new types during the decay process Of the active particles, their maximum absorption at 410 and 580 nm respectively. The analysis shows that 410 nm belongs to the absorption of 1,4-naphthoquinone dehydrogenation radicals, and 580 nm is likely to belong to the transient product formed by electron transfer. Further study found that 1, 2 - naphthoquinone in neutral aqueous solution can be 248nm laser single photon ionization.