CAJ | 학술논문

苯胺的脉冲辐解和激光光解研究
분알적맥충복해화격광광해연구
A PULSE RADIOLYSIS AND LASER FLASH PHOTOLYSIS STUDY OF ANILINE

万方数据

辐射研究与辐射工艺学报輻射研究與輻射工藝學報 복사연구여복사공예학보
JOURNAL OF RADIATION RESEARCH AND RADIATION PROCESSING
2001年 1期 26-31 ,共6页

张超杰%孙晓宇%王玫%汪世龙%倪亚明%钱素萍%林维真%韩镇辉%潘景喜%姚思德

장초걸%손효우%왕매%왕세룡%예아명%전소평%림유진%한진휘%반경희%요사덕

苯胺%Photo-Fenton降解%脉冲辐解%激光光解苯胺%Photo-Fenton降解%脈遲輻解%激光光解
분알%Photo-Fenton강해%맥충복해%격광광해

用脉冲辐解与激光光解时间分辨技术，从瞬态方面研究了苯胺Photo-Fenton降解的可行性。研究表明，水溶液中苯胺可为308 nm的激光光电离，光电离的瞬态产物为阳离子自由基及脱质子后的中性自由基；并测得阳离子自由基脱质子转变为中性自由基的pKa值为7.5，以二苯甲酮为参比，测得苯胺光分解的量子产额极高(0.08)。应用脉冲辐解时间分辨技术研究了苯胺被羟基自由基降解的反应机理，结果表明，36%的羟基自由基直接进攻-NH2形成NH,54%的羟基自由基与苯胺邻位加成，10 %的羟基自由基与苯胺对位加成。
용맥충복해여격광광해시간분변기술，종순태방면연구료분알Photo-Fenton강해적가행성。연구표명，수용액중분알가위308 nm적격광광전리，광전리적순태산물위양리자자유기급탈질자후적중성자유기；병측득양리자자유기탈질자전변위중성자유기적pKa치위7.5，이이분갑동위삼비，측득분알광분해적양자산액겁고(0.08)。응용맥충복해시간분변기술연구료분알피간기자유기강해적반응궤리，결과표명，36%적간기자유기직접진공-NH2형성NH,54%적간기자유기여분알린위가성，10 %적간기자유기여분알대위가성。
Time –resolved pulse radiolysis and laser flash photolysis has been used to study the Photo-Fenton degradation of aniline. Using laser flash photolysis technique, it is demonstrated that aniline in aqueous solution is ionized by 308 nm photon to give hydrated electron and neutral radical resulting from rapid deprotonation of radical cation of aniline. The pKa value is found to be 7.5, and the quantum yield of the photo ionization is 0.08. Time –resolved pulse radiolysis has been used to study the reaction of aniline with *OH, and it was established that 36% *OH radical react directly with the –NH2 moiety resulting in anilino radical. The main primary process (54%) is the ortho-directed *OH-adduct.The remaining 10% *OH attack most probably the para position of the aniline ying.