Hydrogen-carbon Raman frequencies

Table 7.30 Raman Frequencies of Single Bonds to Hydrogen and Carbon...

The Raman spectra of DLC films were used to study the effects of the C60- Ar ratio in their preparation.303 Raman spectroscopy was used to characterise a-C H amorphous hydrogenated carbon (DLC) films formed by vacuum arc deposition,304 and DLC films prepared using a high power, high-frequency excimer laser.305 Several other Raman and IR studies for the characterisation of DLC films have appeared.306 309... 

One important catalytic reaction cycle which starts from a primary gas mixture of carbon monoxide and hydrogen is the Eischer—Tropsch synthesis. Depending on the reaction parameters (temperature of the catalytic surface, gas pressure and composition of the gas mixture) a great variety of aliphatic, aromatic and even oxygen-containing compounds can be obtained. The understanding of reaction mechanisms in terms of the appearance of intermediates on the surface, their structure and symmetry, is of fundamental interest for the development of well-defined reaction pathways. The frequency of the C—H stretching Raman band is a measure of the state of hybridization of the adsorbed molecule. 

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