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Photochemical Reactions of Hypocrellin A with Dibenzylamine and N-methylbenzylamine
Chen Yongkuan,Li Cong,Tai Hong,Gu Kun,Wang Hanqing*,Chen Yuanteng
Author NameAffiliationE-mail
Chen Yongkuan State Key Laboratory of OSSOLanzhou Institute of Chemistry PhysicsChinese Academy of SciencesLanzhou 730000  
Li Cong Department of Application ChemistryYunnan UniversityKunming 650091  
Tai Hong Department of Clinical LaboratoryFirst Peoples Hospital of Yunnan ProvinceKunming 650032  
Gu Kun Department of Application ChemistryYunnan UniversityKunming 650091  
Wang Hanqing* State Key Laboratory of OSSOLanzhou Institute of Chemistry PhysicsChinese Academy of SciencesLanzhou 730000 whqwt@hotmail.com 
Chen Yuanteng State Key Laboratory of OSSOLanzhou Institute of Chemistry PhysicsChinese Academy of SciencesLanzhou 730000  
Abstract:
In order to discuss the free radicals formation mechanism of Hypocrellin A(HA)with amino derivatives,the electron-spin resonance( ESR) spectroscopy was adopted to study the photochemistry on HA with dibenzyl amine(DBA)and N-methyl benzyl amine(NMBA),respectively. When HA with DBA or NMBA in chloroform solution was illuminated with visible light,singlet oxygen,semiquinone radical and oxynitride radical were formed depending on the condition of the solvent system containing the amino-substituted and solved oxygen. The signal intensity of oxynitride radical decreased with increasing the illumination time,and the signal intensity of semiquinone radical increased with increasing the illumination time. The oxynitride radical content was in inverse ratio with the semiquinone radical generated by being irradiated. In the aerobic system of chloroform solution containing DBA/HA,smiquinone radical was the main radical irradiated. The results indicated that HA induced amino derivatives into HA semiquinone radical.
Key words:  Hypocrellin A,Diphenylamine,N-methyphenylamine,Photochemical reaction
FundProject:
Hypocrellin A与二苄胺和N-甲基苄胺的光化学反应
陈永宽,李聪,台虹,古昆,汪汉卿a*,陈远藤
摘要:
为了探讨Hypocrellin A(HA)与胺基衍生物反应的自由基形成机制,我们采用ESR 谱分别研究了HA与二苄胺(DBA)和N-甲基苄胺(NMBA)的光化学反应. 在含胺类物质和溶解氧的溶剂系统下,可见光照射HA激发成HA*,然后将溶解氧转变成1O2,1O2诱导DBA或NMBA 的氯仿溶液都能产生半醌自由基和氮氧自由基. 氮氧自由基的信号强度随光照时间的增加而减弱,而半醌自由基的信号强度随光照时间的增加而增强,氮氧自由基的含量与光照产生的半醌自由基成反比. 在除氧条件下,光照含HA和DBA的氯仿溶液体
关键词:  Hypocrellin A  二苄胺  N-甲基苄胺  光化学反应
DOI:10.1088/1674-0068/17/1/61-65
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