Excimer fluorescence spectra of aromatic liquids

Morphology directing synthesis of benzo[a]pyrene microstructures and their photo physical properties

“…This type of broad red shifted band appears when the transition occurs from the excited state to a ground state having highly repulsive potential surface. The broad emission band is due to BaP excimer as reported earlier by Birks et al [38]. It is also interesting to note that the position of broad excimer bands of the samples studied is almost in the same position except a small blue shift for the rectangular plate like structure of benzo[a]pyrene microcrystal.…”

“…Like pyrene and its derivatives, benzo[a]pyrene also displays excimer emission at high concentration [38], and has been used widely as a fluorescence probe molecule due to the strong dependence of the monomer fluorescence on the solvent polarity [39]. Here we report the synthesis of cube, rectangular bar, square rod and rectangular plate shaped microstructures of benzo[a]pyrene using SDS as morphology directing agent of microstructures.…”

Synthetic Aspects of Photochemical Electron Transfer Reactions

“…For example, cation radicals generated by one-electron transfer from localized atomic or delocalized molecular orbitals undergo loss of protons from positions either a or f3 to the charged centers producing neutral radical species as depicted in equations (7)- (9). Other electrofugal groups, such as stabilized carbocations (10)], carbon dioxide [equation (11)], and organometallic moieties [equation (12)] can be lost in conversion of radical cations to neutral radicals.…”

Luminescent properties and structure of multicomponent naphthalene-β-cyclodextrin complexes. 1. Effect of adding third parties, o-carborane or/and adamantane

“…An appearance of EF spectrum against the background of usual fluorescence (monomer fluorescence, MF) is due to the formation of the excited dimer Nph-Nphn, which after radiation converts into two non-interacting Nph molecules in the ground state [7]. In solutions, a dimer structure responsible for the appearance of EF is formed as a result of diffusion collisions.…”