C. Mao, Charlotte L. Larson, S. Tucker
Jan 1, 2002
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0
Influential Citations
6
Citations
Journal
Polycyclic Aromatic Compounds
Abstract
The ability of diisopropylamine to selectively quench the fluorescence intensity of nonalternant as opposed to alternant polycyclic aromatic hydrocarbons (PAHs) dissolved in acetonitrile was investigated. Sixteen alternant PAHs and 14 nonalternant PAHs were examined. Five PAHs, which contain a fixed double bond in the cyclopenta ring, were also included in this study. The experimental results indicated, with few exceptions, that diisopropylamine selectively quenched the fluorescence emission intensity of nonalternant PAHs, leaving the fluorescence intensity of most alternant PAHs unaffected. These results also confirmed the classification of the PAHs that contain a fixed double bond in the five membered rings as alternant not nonalternant PAHs. Limitations in the use of diisopropylamine as a selective quenching agent were also studied. Diisopropylamine does not retain its selective fluorescence quenching ability for nonalternant PAHs in acidic media.