I am looking for a mechanism of thermal decomposition of NMP and wondering whether free radical can be formed during the heating of NMP. Also, I heated graphite powder dissolved in NMP for 1 h at 170 C and after filtering the NMP changed its color from light yellow and transparent to dark orange like dark beer. Any ideas what happened?
Graphite may act as a dehydrogenating agent to give pirrole derivatives...
Check:
heat treatment of coals in various solvents at temperatures
as low as 175 - 300oc
masashi iino,
Dear Dr. Kaufman, thank you very much, helped a lot! How do you think, would that possibly be able, that some products of heated NMP can covalently attach to the graphite? Thanks.
Bandurin,
I would like to bring your attention that by doing that you may be transferring graphite to graphene nanoparticle according to literatures. Please, see
---Oh, Se Young; Kim, Sung Hwan; Chi, Yong Seung; Kang, Tae Jin, Applied Surface Science (2012), 258(22), 8837-8844.
Good luck
Dear Denis : As you know from spectroscopic analysis you can identify what is going on for you sample( i.e. data analysis UV , FT-IR, H-NMR, ...etc).
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