Its spectra must be collected on freshly purified samples handled in an inert atmosphere such as nitrogen or argon .
Hexacene is very unstable , being highly reactive in the 6 , 15 positions due to pi electron localization .
Hexacene 's spectra must be collected on freshly purified samples handled in an inert atmosphere such as nitrogen or argon .
Hexacene is very unstable , being highly reactive in the 6 , 15 positions due to pi electron localization .