Physical nucleation is rapid but too weak to be stable at flame temperatures, while most chemical nucleation rates are slow. Frenklach and Mebel recently suggested an enhancement of polyaromatic polymerization induced by internal rotors. These rotors were argued to provide multiple opportunities for an aryl radical to attach to the reactive edge of a PAH, such as a rim-based pentagonal ring. A dimerization reaction of π-diradicals was reported to confirm that the physical interaction between PAHs could accelerate chemical nucleation . Such a mechanism, known as physically stabilized soot inception, shows a feasible pathway to explain the fast growth of soot. However, most previous work focuses on the dimerization process. The dynamic evolution between multiple reactive species is still not well understood.