Over the past decades, carbon allotropes have been extensively studied and applied to various technological applications due to their unique electronic and optical properties. Contemporary research ha...

Recently, the interest in nonbenzenoid hydrocarbons has resurged, focusing on the replacement of two benzenoid hexagons with a pentagon/heptagon pair, which has led to abundant azulenoid hydrocarbons....

Azulene-based polycyclic hydrocarbons have garnered much attention as potential materials for organic optoelectronic devices and as molecular models for graphene nanosheets with structural defects. Al...