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LUMINESCENT OBSERVATION OF MULTIPHOTON RESONANT IONIZATION AND DISSOCIATION OF $CrO_{4}{^{2-}}$ MOLECULAR ANIONS ADSORBED ON DISPERSE $SiO2$ SURFACE

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dc.creator Glinka, Yu. D. en_US
dc.creator Naumenko, Sergej N. en_US
dc.creator Ogenko, V. M. en_US
dc.creator Chujko, A. A. en_US
dc.date.accessioned 2006-06-15T18:48:15Z
dc.date.available 2006-06-15T18:48:15Z
dc.date.issued 1993 en_US
dc.identifier 1993-FC-7 en_US
dc.identifier.uri http://hdl.handle.net/1811/18425
dc.description Author Institution: Institute of Surface Chemistry of the Ukrainian Academy of Sciences; Department of Physics, Kiev State University en_US
dc.description.abstract Molecular anions (MA) $CrO_{4}{^{2-}}$ adsorbing on the disperse $SiO_{2}$ surface form adsorption complexes (AC) with strong polarized donor-acceptor $\pi-bonds^{1}$. The formation of such chemical bonds between MA $CrO42-$ and active surface centers (oxygen vacancies (OV)) causes high surface optical nonlinearity showing in a high probability of multiphoton processes. The multiphoton AC ionization (multiphoton MA desorption) with the subsequent MA fragmentation (photodissosiation) was detected by means of luminescence $methods^{2}$. The luminescence ($\lambda exc = 1064 nm)$ is due to the recombination of free charge carriers with ionized OV and $CrO_{4}-ions^{1.2}$. Processes of multiphoton absorption with the subsequent AC ionization and MA fragmentation proceed through intermediate resonant states (antibonding and autoionization AC states) exciting under conditions of three- and five-six-photon resonances, $respectively^{2}$. 1. Yu.D. Glinka, S.N. Naumenko, V.M. Ogenko, and A.A. Chujko $//$ Exten. abstr. 4th Int. Conf. on Fundamentals of Adsorption. Kyoto, Japan. 1992 P.455-457. 2. Yu.D. Glinka, S.N. Naumenko // Book of Summaries Int. Conf. on Advanced and Laser Technologies. Part 4. Moscow, Russia. 1992 P.114-117. en_US
dc.format.extent 109792 bytes
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dc.language.iso English en_US
dc.title LUMINESCENT OBSERVATION OF MULTIPHOTON RESONANT IONIZATION AND DISSOCIATION OF $CrO_{4}{^{2-}}$ MOLECULAR ANIONS ADSORBED ON DISPERSE $SiO2$ SURFACE en_US
dc.type article en_US