I took RAMAN spectrum of Sulfur and carbon composite for lithium sulfur batteries. Carbon is loaded with sulfur. i searched literature but i could not find data about Raman peak at 800.
Dear Dr. Muhammad Usman Rana,
the frequencies of vibration depend on the masses of the atoms involved and the strength of the bonds between them. Heavy atoms and weak bonds have low Raman shifts. Light atoms and strong bonds have high Raman shifts.
We see the high frequency carbon-hydrogen (C-H) vibrations in the polystyrene spectrum at about 3000 cm-1. The low frequency carbon-carbon (C-C) vibrations are at around 800 cm-1. The C-H vibrations have a higher frequency than the C-C vibrations because hydrogen is lighter than carbon.
We see the vibrations of two carbon atoms linked by strong double bonds (C=C) at around 1600 cm-1. This is at a higher frequency than two carbon atoms lined by a weaker single bond (C-C, 800 cm-1).
Perhaps, this last bond is compatible with your chemical compounds.
Source: https://www.renishaw.com/en/raman-bands-explained--25808
Best regards, Pierluigi Traverso
Pierluigi Traverso Sir,
thank you very much for your reply. i have seen this link also. but your reply helped me to think more.
I am obtaining these Raman spectra of modified graphene oxides. The band at 800 cm-1 appears everywhere, similar height so I though is an artifact.. some hints?
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