For as long as man has known fire, he has also been aware of soot-but the fact that fullerenes can be formed in a flame has only been been known for eleven years (see diagram). The research into the mechanism of their formation has brought forth many other unexpected particles that can exist in flames, for example "aromers" (aromatic oligomers).
A kinetic study of the chemiluminescence of the emitters CH(A2Δ), C2(d3Πg) and C2H* in a mixture of acetylene, oxygen and hydrogen atoms has been performed using a low pressure discharge flow reactor at 2.66 mbar and 298 K under largely varying initial conditions. The absolute concentrations of the emitters could be quantitatively simulated and correlated to the simultaneous formation of higher hydrocarbons in this system when the following formation reactions of the excited species are assumed
These reactions are in particular accord with the dependence of the chemiluminescence on the concentration of free hydrogen atoms.
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