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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Low Concentration Anomalies in the Electronic Energy Transfer Behavior of Saturated Hydrocarbon Liquids
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Low Concentration Anomalies in the Electronic Energy Transfer Behavior of Saturated Hydrocarbon Liquids

机译：饱和烃液体的电子能量转移行为中的低浓度异常

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The transfer of electronic energy to 2, 5-diphenyloxazole (PPO) from the neat liquids cyclohexane, n-hexadecane, and 2, 3-dimethylbutane, and from dilute solutions of cis-decalin in the nonfluorescent solvents 2, 2, 4-trimethylpentane (isooctane), 2, 2, 4, 4, 6, 8, 8-heptamethylnonane (HMN), and 2, 2-dimethylbutane has been studied for excitation at 161 nm over a PPO concentration range from 10~(-2) to 10~(-5) M. The results confirm and generalize earlier measurements showing that in saturated hydrocarbon liquids there exists an anomalously efficient sensitization of PPO fluorescence that is mainly manifested at low PPO concentrations and derives from a state, T, other than the normal fluorescing state. The T state process is shown not to depend on the viscosity of the system or on the concentration of the donor liquid. A mechanism is suggested involving the generation of an ion-pair state and the migration of its charge separation to PPO.
机译：从纯净的液体环己烷，正十六烷和2，3-二甲基丁烷以及顺式十氢化萘在无荧光溶剂2，2，2，4-三甲基戊烷中的稀溶液将电子转移到2，5-二苯基恶唑（PPO）已经研究了（异辛烷），2、2、4、4、6、8、8-七甲基壬烷（HMN）和2,2-二甲基丁烷在161 nm范围内从10〜（-2）至10〜（-5）M。结果证实并概括了先前的测量结果，表明在饱和烃液体中存在异常有效的PPO荧光增感，主要是在低PPO浓度下表现出来的，并且是由非正常状态T引起的。荧光状态。示出T状态过程不取决于体系的粘度或供体液体的浓度。建议一种机制涉及离子对状态的产生及其电荷分离向PPO的迁移。

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