Fluorescence Emission and Absorption Spectra of Naphthalene in Cyclohexane Solution: Evidence of a Naphthalene-Oxygen Charge-Transfer Complex.

ABSTRACT: Molecular fluorescence is typically reduced or "quenched" by dissolved oxygen present in solutions. Quenching mechanisms are broadly categorized as dynamic quenching, and static quenching. Dynamic quenching involves collisions between oxygen and the fluorophore. Static quenching occurs when the fluorophore forms a nonfluorescent complex with oxygen. In a previous study, oxygen quenching of naphthalene showed evidence of static quenching, although the mechanism was not known. The earlier work was limited to low oxygen concentrations (∼2 mM) in cyclohexane, leading to relatively large uncertainties in the value of the static quenching constant. In the present study, oxygen concentrations up to ∼50 mM were used, resulting in a more accurate determination of the static quenching constant. Abso

SUBMITTER: Brownrigg JT 

PROVIDER: S-EPMC11800151 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature