单线态氧在化学和生物体系中的作用及其检测技术

生方式?单线态氧的检测技术Р一、单线态氧的分子结构及其反应特性Р1.1单线态氧的分子结构Р3Sg-Р1DgР1Sg+Р1.2单线态氧物理性质РpropertiesР1ΔgР1Σg+РEnergy above ground stateР23.5kcal/molР37.6kcal/molРLight emissionР1268.7 nmР761.9 nmРHalf lifetime at one atmosphereР5.0x10-2sР-РSolution lifetimeР10-5sР10-10sРGas collision survivalР108Р10-100РRadiative lifetimeР2700sР7sР1.2.1单线态氧基本物理性质Р1.2.2单线态氧在各种溶剂中的寿命РAmeta SC, Punjabi PB, Chobisa CS, Mangal N and Bhardwaj R. (1990) Asian Journal of Chemistry Reviews. 1(2):106-124.Р1.2.3单线态氧淬灭跃迁的化学发光РO2(1Dg)Р2O2(1Dg)Р2O2(3Sg- ) + hu (l = 633nm)РO2(1Sg+)РO2(3Sg-) + hu (l = 1269nm)РO2(3Sg-) + hu (l = 703nm)Р1.3单线态氧的化学性质Р1.3.1单线态氧与单烯烃反应РGorman A. A. Rodgers M. A. J. Chem. Soc. Rev. 1981, 10, 205.Р1.3.2 单线态氧与链状、环状、芳香、杂环芳香型共轭π键发生Diels-Alder型加成Р1.3.2 单线态氧与带有N、O或S等给电子杂原子的活泼双键反应Р1.3.2 单线态氧与类胡罗卜素、胺类、酚类、硫醚和杂环类化合物发生较复杂的反应