"Carbo-aromaticity" and novel carbo-aromatic compounds

Area of Science:

• * Organic Chemistry
• * Materials Science
• * Theoretical Chemistry

Background:

• * The concept of aromaticity is expanding beyond traditional definitions.
• * Recent proposals suggest aromatic character in small ring systems like acetylene.
• * This necessitates a broader framework for understanding aromaticity in novel carbon structures.

Purpose of the Study:

• * To define and explore
• carbo-aromaticity
• in carbon-enriched compounds (carbo-mers).
• * To survey recent synthetic, physical, and theoretical chemistry results on carbo-mers.
• * To investigate the potential of carbo-mers as molecular materials.

Main Methods:

• * Review of existing literature on carbo-mers and related aromatic systems.
• * Analysis of experimental and theoretical data on functional, rigid, macrocyclic carbo-benzenes.
• * Comparison with non-aromatic and pro-aromatic carbo-benzene references.
• * Survey of theoretical advances in carbo-mers of carbon allotropes like graphene and graphite.

Main Results:

• * Carbo-mers are constitutionally
• carbon-enriched
• and functionally
• π-electron-enriched
• .
• * Functional carbo-mers demonstrate promising linear/nonlinear optical properties and single-molecule conductivity.
• * Theoretical predictions suggest significant electrical, optical, and mechanical properties for extended carbo-materials like graphynes and graphdiynes.

Conclusions:

• * Carbo-aromaticity represents a significant expansion of aromatic compound classification.
• * Carbo-mers are emerging as a new class of molecular materials with tunable properties.
• * Further research into carbo-mers, including experimental validation, is warranted.