Topic
Excimer
About: Excimer is a research topic. Over the lifetime, 3725 publications have been published within this topic receiving 75104 citations.
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TL;DR: In this paper, the temperature and solute concentration dependence of the excimer/molecular intensity ratio in the delayed emission spectrum of pyrene in ethanol was interpreted quantitatively in terms of a re-encounter of the triplet-triplet annihilation partners using a one-dimensional random walk model.
27 citations
TL;DR: In this article, a model was proposed to explain the kinetics of fluorescence and energy transfer in thin films of polyvinyl carbazole based on the migration of monomer excitons with activator molecules, dimers, and excimer forming sites competing as traps for the exciton energy.
27 citations
TL;DR: The absorption and luminescence of syn and anti-paracyclonaphthane are reported and compared to the excimer emission from 1,4-dimethyl-naphthalene as discussed by the authors.
27 citations
TL;DR: In this article, a density-dependent nonexponential decay caused by bimolecular excimer quenching with a measured rate constant of k?2±1×10−10 cm3 sec−1 molecule−1.
Abstract: The continuous emission bands of molecular mercury at 0.335 and 0.485 μm are excited in a pure mercury vapor by direct optical pumping of the weakly bound ground state molecules with a 5 nsec pulse of intense 0.266 μm radiation in order to study the radiative and collisional properties of the excited molecules at densities between 1014 and 1015 cm−3. Fluorescence time history of both bands are empirically analyzed in terms of dynamics governing the excited molecules. The analysis includes a density‐dependent nonexponential decay caused by bimolecular excimer quenching with a measured rate constant of k?2±1×10−10 cm3 sec−1 molecule−1. Because of interest in the mercury system as a potential laser medium, estimates of gain coefficients are derived from fluorescent power measurements. However, transmission measurements of the excited medium at 0.325 and 0.4416 μm show significant net loss due to excited state absorption with an estimated absorption cross section on the order of 10−17 cm2 at 0.325 μm. Energy storage limitations implied by the bimolecular excimer quenching are also examined.
27 citations
TL;DR: In this article, the same thermal activation barrier between B-state and excimer state, (350 ± 30) cm-1, is found as in the single crystal, and the intrinsic lifetime of the Bstate is measured to be about (200 ± 10) ns in accordance with previous estimates.
27 citations