All-benzenoid Graphitic PAHs Larger than HBCs

All-benzenoid Graphitic PAHs Larger than HBCs 

Increasing the size of the core of discotic materials is predicted to improve the columnar stability and order due to the large overlap of the i-surface and thus to 

Due to the steric congestion between periphery naphthyl groups, molecule 46 is not planar and thus is partially soluble in common organic solvents. 

As structural analogues to naphthalene and triphenylene, molecules 55 and 56 can be regarded as supemaphthalene and supertriphenylene , respectively (Fig. 3.12) [56]. Two or three HBCs annealed together improve the Ti-conjugation, in contrast to what was observed for the linear connected H BC oligomers 38 and 39. Attachment of flexible alkyl chains onto the former leads to formation of an ordered columnar liquid crystalline phase [57]. 

While the insolubility of the resulting graphite ribbons 60 precluded standard spectroscopic structure elucidation, their electronic and vibrational properties were 

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