Photoexcitation of aqueous ruthenium (II)-tris-(2,2'-bipyridine)with high-intensity femtosecond laser pulses

Article Abstract:

A transient absorption study is conducted on the photochemistry of concentrated aqueous solution of [[Ru.sup.II][(bpy).sub.3]].sup.2+], as a function of pump power under a high-intensity femtosecond laser excitation. The photolysis of [[Ru.sup.II][(bpy).sub.3]].sup.2+] leads to the photoproducts, the complex in the [super 3]MLCT triplet excited state [[Ru.sup.II][(bpy).sub.2][(bpy.sup.-)]].sup.2+], the oxidized form [[Ru.sup.III](bpy).sub.3]].sup.3+] , the reduced species [[Ru.sup.II](bpy).sub.3]].sup.+], and the sovent electrons [e.sub.aq].

Optical properties, Aqueous solution reactions, Chemical properties, Report

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Theoretical investigation of the surface reaction N(sub ads)+H(sub ads) "Yields" NH(sub ads) on Ru(0001) using density functional calculations, variational transition-state theory, and semiclassical tunneling method

Article Abstract:

A suitable framework is provided by TST to compute rate constants including quantum transmission effects for a quite complex surface reaction involving 2 coadsorbates and 12 substrate metal atoms. This would be a rigorous treatment of all of the quantum effects of the system and would eliminate the recrossing problem, giving a precise indication on the reliability of the method used for application to surface reactions.

Usage, Density functionals, Density functional theory, Quantum chemistry

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Excited-state relaxation dynamics of Ru(dcbpy)2(NCA)2, studied by fluorescence upconversion spectroscopy

Article Abstract:

Excited-state relaxation dynamics of a ruthenium-based dye (Ru(dcbpy)2(NCA)2) are investigated by femtosecond fluorescence spectroscopy. It is important to understand the dynamics of excited-state relaxation in the sensitizer molecule as it helps in designing efficient photochemical storage devices.

Dynamics, Dynamics (Mechanics), Fluorescence spectroscopy

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