Details

Autor(en) / Beteiligte

• Brownrigg, J. Thomas
• Kenny, Jonathan E

Titel

Fluorescence Intensities and Lifetimes of Aromatic Hydrocarbons in Cyclohexane Solution: Evidence of Contact Charge-Transfer Interactions with Oxygen

Ist Teil von

• The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 2009-02, Vol.113 (6), p.1049-1059

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2009

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.