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29 June 1998 Influence of fluorination on the lasing efficiency of laser active media
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Proceedings Volume 3403, International Conference on Atomic and Molecular Pulsed Lasers II; (1998) https://doi.org/10.1117/12.311940
Event: International Conference on Atomic and Molecular Pulsed Lasers, 1997, Tomsk, Russian Federation
Abstract
Theoretical and experimental results of studies on the fluorosubstituted derivatives of coumarines are presented. The emission properties have been investigated under XeCl*- laser excitation ((lambda) equals 308 nm). The quantum chemical algorithms and programs are based on the semiempirical method with intermediate neglect of differential overlapping involving particular spectroscopic parametrization. The intermolecular donor-acceptor interactions have been researched using molecular electrostatic potential method. It is shown that the fluorination leads to longer lasting lifetime (E1/2) both due to high strength of CF-bond and to absence of the absorption of the final photoproducts in the lasing region. The introducing of F atoms at the photochemically active positions to the molecules reduces the rate of formation of the secondary photodecomposition products. The radiative and nonradiative relaxation constants of the excitation energy are calculated.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Irina V. Sokolova and Nina Vasil'eva "Influence of fluorination on the lasing efficiency of laser active media", Proc. SPIE 3403, International Conference on Atomic and Molecular Pulsed Lasers II, (29 June 1998); https://doi.org/10.1117/12.311940
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