Dependence of the Fluorescent Lifetime Tau on the Concentration at High Dilution

Langhals, Heinz and Schlücker, Thorben (2022): Dependence of the Fluorescent Lifetime Tau on the Concentration at High Dilution. In: Journal of Physical Chemistry Letters, Vol. 13, No. 32: pp. 7568-7573

Abstract

Long-range interactions between electronically excited molecules and molecules at the ground state were found for distances of much more than 100 nm, as indicated by the dependence of the fluorescence lifetime on the concentration of dyes in diluted solutions. In contrast to this experimental result, the fluorescence lifetimes of distant isolated molecules should be independent from the concentration according to basic theory for light emission, such as that reported by Forster and Strickler-Berg. As a consequence, the theory of such emission should be modified for real systems to include electromagnetic interactions with distant resonating structures. Consequences of these findings concern many subjects, such as imaging methods (FLIM) in biochemistry.

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• ISSN: 1948-7185
• Language: English