Raman spectroscopy in organic materials: part I - Cavaignac, André Luís de Oliveira;Lima, Ricardo Jorge Cruz
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A Raman study relating anharmonicity and thermal decomposition for the first time. In this work high-temperature Raman spectra are used to compare temperature dependence of the lattice mode wavenumber of L-alanine, L-threonine and taurine crystals. Short and strong hydrogen bonds in L-alanine crystal were associated with anharmonic effects in lattice modes leading to low thermal stability compared to taurine crystals. Connection between thermal decomposition process and anharmonic effects is furnished for the rst time.

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Produktbeschreibung
A Raman study relating anharmonicity and thermal decomposition for the first time. In this work high-temperature Raman spectra are used to compare temperature dependence of the lattice mode wavenumber of L-alanine, L-threonine and taurine crystals. Short and strong hydrogen bonds in L-alanine crystal were associated with anharmonic effects in lattice modes leading to low thermal stability compared to taurine crystals. Connection between thermal decomposition process and anharmonic effects is furnished for the rst time.
Autorenporträt
Food engineer and master in materials science by the Federal University of Maranhão (UFMA). Professor at Ceuma University and UFMA in the engineering courses, has as research lines the characterization of organic crystals by Raman, with publications in international papers. Now he works in materials characterization at doctorate.