Polarization measurement in macro- and micro-Raman spectroscopies: molecular orientations in thin films and Azo-Dye containing polymer system

Article Abstract:

A study is conducted to recall some basic knowledge, concepts an experimental cautions in order to perform precise macro- and micro-Raman polarized experiments and accomplish the related data treatments. Various polymer samples which could be processed as thin films are able to transform into strongly anisotropic and partly oriented systems under mechanical or photonic constraints, and these samples are then characterized by a distribution function of the molecular orientations with respect to one selected direction.

Cyclic crudes and intermediates, Azoic Dyes & Components, Synthetic Organic Dye and Pigment Manufacturing, Usage, Raman spectroscopy, Azo dyes, Structure

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Heterogeneous reactions on salts

Article Abstract:

Heterogeneous reactions of atmospherically relevant gas-phase species on salt substrates, that may be presented as solids in the form of polycrystalline grains, powders, single crystals or thin solid films, deliquescent aerosols, solutions or frozen aqueous solutions are reviewed. The synopsis focuses on studies revealing quantitative information on the reactivity of the gas in the presence of the condensed phase containing salt.

Aerosols, Aqueous solution reactions, Chemical properties

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Photoinduced electron transfer at molecule-metal interfaces

Article Abstract:

Photoinduced electron transfer at molecule-metal and molecule-semiconductor interfaces is a common problem underlying many important chemical processes, such as solar energy conversion, molecular optoelectronics, and photocatalysis. A direct mechanism called two-photon photoemission, which suggests the dominance of a direct, photoinduced metal-to-molecule electron transfer is presented to solve this problem.

Semiconductor Devices, Analysis, Semiconductor device, Electric properties, Photoemission, Optical properties, Electron transport, Catalysis

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