Vol. 19, issue 07, article # 13

Kuznetsova R.T., Manekina Yu.A., Tel'minov E.N., Maier G.V., Arabei S.M., Pavich T.A., Solov'ev K.N. Spectroscopic, lasing, and photochemical characteristics of organic molecules in silica gel-matrices. // Atmospheric and oceanic optics. 2006. V. 19. No. 07. P. 586-593.
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The spectral-luminescent, photochemical and lasing characteristics of some laser dyes: Rhodamine, phenalemine, oxazole, and benzonitrile derivatives, doped into inorganic and hybrid (organic-inorganic) solid silica matrices of different composition and shapes have been studied under conditions of pumping by low-intensity emissions from electron tubes and lasers at different wavelengths and intensities. It has been shown that optical properties of thin silica gel-films (< 1 µm) doped with organic molecules have some peculiarities compared with 3-D gel-matrices. The photostability, lasing efficiency, and spectral characteristics of solid-state matrices doped with dyes have been determined as functions of the pump intensity and absorbed pump energy. It has been shown that the molecular and laser photostability of dyes in gel systems is usually higher as compared with that in ethanol solutions. The proton transfer from solid matrices to the proton-acceptor centers of some dyes is observed in the ground and excited states. The reasons of the changes in molecular spectroscopic characteristics in gel-systems under laser pumping are discussed