Superexciplex of Coumarin Molecules using Tunable Ti-Sapphire Laser

Alghamdi, Abdullah; Aldwayyan, Abdullah S.; Masilamani, V.; Al-Saud, Turki S.M.; Al-Salhi, Mohammed Saleh

doi:10.1143/jjap.42.6610

Cited by 3 publications

(1 citation statement)

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“…When an excited molecule combines with another molecule in the ground state, this process is called exciplex. Whereas two identical excited molecules combine with a solvent, the solvent acts as a bridge between two excited molecules, called a superexciplex [ 5 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Spectral Characteristics and Molecular Structure of (E)-1-(4-Chlorophenyl)-3-(4-(Dimethylamino)Phenyl)Prop-2-en-1-One (DAP)

Aldaghri

2021

Materials

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In this work, a laser dye of (E)-1-(4-chlorophenyl)-3-(4-(dimethylamino)phenyl)prop-2-en-1-one (DAP) was synthesized and examined as a new laser medium. The compound DAP’s photophysical properties were investigated under the influence of solvents, concentrations, and pump power excitations. The absorption spectra showed a single band, and the shape of the spectra remained the same, regardless of the optical density. The fluorescence spectra showed a band around 538 nm; its intensity was inversely proportional to the concentration. DAP exhibits dual amplified spontaneous emission (ASE) bands at 545 and 565 nm under suitable pump power laser excitation and concentration. The results revealed that the ASE band at 565 nm is affected by solvents polarity, concentrations and pump power energies. This band could be attributed to the combination of two excited molecules and the solvent between them (superexciplex). Moreover, the molecular structure, the energy bandgap, and the total energy of DAP was calculated using density functional theory.

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Section: Introductionmentioning

confidence: 99%