Scheme 1
From: Narrowing band gap chemically and physically: conductive dense hydrocarbon
a Dicoronylene (C48H20) obtained via vapor phase fusion reaction of coronene (C24H12) molecules. Molecular structures, crystal structures and optical micrographs of C24H12 and C48H20. b Absorption spectra (Absorbance Unit, A.U.) of C24H12 (yellow) and C48H20 (pink). c Optical band gaps derived from absorption spectrum for four PAH molecules plotted against the number of π-electrons. Green line is for the guide to the eyes.
