Fluorescence spectra and quantum yields of buckminsterfullerene (C60) in room-temperature solutions. No excitation wavelength dependence

Abstract

Noise-eliminated fluorescence and fluorescence excitation spectra of Cm in room-temperature hexane and toluene solutions are obtained with the application of principal component analysis. Fluorescence quantum yields of 2.0 X 10-4 and 2.2 X 10-4 are determined for Cm in hexane and toluene, respectively. Fluorescence spectra and fluorescence quantum yields are excitation wavelength independent for different bands of the absorption spectrum, indicating no competing decay pathways to the rapid internal conversion relaxation of the upper excited singlet states. The excited-state properties of Cm are discussed on the basis of these results, and a comparison is made between experimental and calculated fluorescence radiative rate constants.

Selective Triplet‐State Formation during Charge Recombination in a Fullerene/Bodipy Molecular Dyad (Bodipy=Borondipyrromethene)

“…Emission spectra were recorded for optically dilute solutions after purging with N 2 . Luminescence quantum yields were determined relative to C 60 in toluene, [55] Rhodamine 6G in water [56] and in ethanol, [57] and fluorescein in 0.1 m NaOH. [56] Emission lifetimes were measured at room temperature with the tau-3 spectrophotometer.…”

Self‐Crystallization of C70 Cubes and Remarkable Enhancement of Photoluminescence

“…In contrast, their optical emission properties have scarcely attracted any attention because of the low exciton population for radiative recombination in fullerene molecules. [10] However, fullerene molecules are still believed to have much potential in terms of their optical properties, as indicated by recent observations of abnormally increased fluorescence from self-aggregated molecules that have intrinsically low emitting power when they exist in an ensemble state in solution or powder phases. For example, Hara and co-workers reported that an asymmetric disulfide compound in which a photoisomerizable azobenzene unit was coupled to a biphenyl fluorophore generally showed negligible fluorescence, but that the photoinduced aggregation of the fluorophores led to remarkably increased fluorescence intensity.…”

Preparation and Applications of Novel Fluoroalkyl End-Capped Acrylic Acid Oligomers/Silica Nanocomposites-Encapsulated Fullerenes

“…detail, and the strong fluorescence spectra of these compounds were observed [22][23][24] . Thus, we have measured the fluorescence spectra of these modified cast films, and the results were shown in .…”