Fluorescence Intensities and Lifetimes of Aromatic Hydrocarbons in Cyclohexane Solution: Evidence of Contact Charge-Transfer Interactions with Oxygen
Fluorescence Intensities and Lifetimes of Aromatic Hydrocarbons in Cyclohexane Solution: Evidence of Contact Charge-Transfer Interactions with Oxygen
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DOI：
10.1021/jp807495h
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发表时间：
2009-02-12
影响因子：
2.9
通讯作者：
Kenny, Jonathan E.
中科院分区：
文献类型：
--
作者：
Brownrigg, J. Thomas;Kenny, Jonathan E.
测量了萘、菲、芘和芘在环己烷溶液中的荧光寿命和荧光强度随氧浓度的变化。强度和寿命与氧浓度的斯特恩-沃尔默图显示，寿命的斯特恩-沃尔默猝灭系数小于强度的斯特恩-沃尔默猝灭系数。静态猝灭模型的数据分析表明，斯特恩-沃尔默斜率差异的结果从芳香族和氧分子之间的电荷转移相互作用的情况下，萘和芘。还报道了一种利用环己烷-氧电荷转移带估算溶解氧浓度的方法。
The fluorescence lifetimes and intensities of naphthalene, phenanthrene, chrysene, and pyrene were measured as a function of oxygen concentration in cyclohexane solution. Stern-Volmer plots of intensities and lifetimes versus oxygen concentrations revealed smaller Stern-Volmer quenching coefficients for lifetimes than for intensities. Analysis of the data in terms of static quenching models suggests that the Stern-Volmer slope differences result from a charge-transfer interaction between the aromatic and oxygen molecules in the cases of naphthalene and pyrene. A method of estimating dissolved oxygen concentration using the cyclohexane-oxygen charge-transfer band is also reported.