Dioxygen NIR FT-Emission (1Δ g → 3Σ− g ) and Raman Spectra of 1,4-Dimethylnaphthalene Endoperoxide: A Source of Singlet Molecular Oxygen
Dioxygen NIR FT-Emission (1Δ g → 3Σ− g ) and Raman Spectra of 1,4-Dimethylnaphthalene Endoperoxide: A Source of Singlet Molecular Oxygen
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1,4-二甲基萘内过氧化物的分子氧近红外 FT 发射 (1Δ g → 3Σ− g ) 和拉曼光谱：单线态分子氧的来源
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Rubim
中科院分区：
文献类型：
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作者：
P. Di Mascio;E. Bechara;J. Rubim
利用配备液氮冷却InGaAs检测器的FT分光光度计，直接检测了1,4-二甲基萘内过氧化物（1,4- dmno2）热解过程中产生的单线态分子氧（1O2）单模光发射（O2, 1Δ g→3Σ−g）。研究了β-胡萝卜素对o2的猝灭作用。bimol的发射也被使用强化二极管阵列探测器检测到，并被1,4-重氮杂环[2.2.2]辛烷（DABCO）增强表征。利用多通道探测器可以获得1,4- dmno2的拉曼光谱，并通过O-O拉伸模式导致的拉曼峰强度降低715-cm−1来跟踪其转化为母体烃1,4-二甲基萘（1,4- dmn）。
Singlet molecular oxygen (1O2) monomol light emission (O2, 1Δ g → 3Σ− g ) generated during the thermodissociation of 1,4-dimethylnaphthalene endoperoxide (1,4-DMNO2) has been directly detected with the use of an FT spectrophotometer equipped with a liquid nitrogen-cooled InGaAs detector. The 1O2 quenching by β-carotene has been observed. The bimol emission has also been detected by the use of an intensified diode array detector and characterized by enhancement with 1,4-diazabicyclo[2.2.2]octane (DABCO). With a multichannel detector it was possible to obtain the Raman spectrum of 1,4-DMNO2 and to follow its conversion into the parent hydrocarbon 1,4-dimethylnaphthalene (1,4-DMN) by the decrease of the Raman 715-cm−1 peak intensity attributed to the O-O stretching mode.