The S1–S0(1B2–1A1) transition of jet‐cooled toluene: Excitation and dispersed fluorescence spectra, fluorescence lifetimes, and intramolecular vibrational energy redistribution
The S1–S0(1B2–1A1) transition of jet‐cooled toluene: Excitation and dispersed fluorescence spectra, fluorescence lifetimes, and intramolecular vibrational energy redistribution
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喷射冷却甲苯的 S1–S0(1B2–1A1) 转变：激发和分散荧光光谱、荧光寿命和分子内振动能量重新分布
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
W. Lawrance
中科院分区：
文献类型：
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作者：
C. G. Hickman;J. Gascooke;W. Lawrance
在喷射冷却的甲苯中，S1-S 0（1B 2 - 1A 1）跃迁的荧光激发光谱已被测量到高于原始带2000 cm−1。分散的荧光光谱的主要功能已被记录，并用于分配在激发中观察到的水平。碰撞能量转移实验已被用来确认一些较低的躺在S1的基本原理，无法通过直接光泵浦访问的任务。已知的S1基本面数量已扩展到13个。分散的荧光光谱揭示了在低的S1振动能量的分子内振动能量再分配（IVR）的发病。在激发光谱中观察到的所有主要波段的荧光寿命进行了测量。在S1振动能量为1900 cm−1时，寿命从00时的86 ns减少到48 ns。为了减轻存在于甲苯中的模式编号的混乱，提出了一种新的方案，该方案避免了这个问题。该系统类似于用于OT的系统。
The fluorescence excitation spectrum of the S1–S0(1B2–1A1) transition in jet‐cooled toluene has been measured up to 2000 cm−1 above the origin band. Dispersed fluorescence spectra of the major features have been recorded and used to assign the levels observed in excitation. Collisional energy transfer experiments have been used to confirm assignments for some of the lower lying S1 fundamentals that were not accessible via direct optical pumping. The number of known S1 fundamentals has been extended to 13. The dispersed fluorescence spectra reveal the onset of intramolecular vibrational energy redistribution (IVR) at low S1 vibrational energies. Fluorescence lifetimes of all of the major bands observed in the excitation spectrum have been measured. The lifetimes decrease from 86 ns for 00 to 48 ns at an S1 vibrational energy of 1900 cm−1. To alleviate the confusion that exists over the mode numbering in toluene a new scheme is proposed which obviates this problem. This system is similar to that used for ot...