π‑Conjugated Heterotriangulene Macrocycles by Solution and Surface-supported Synthesis toward Honeycomb Networks

A comparative
analysis between a solution and a surface-mediated
synthesis of heterotriangulene macrocycles is reported. The results
show a preferential formation of the π-conjugated macrocycles
on surface due to two-dimensional confinement. The macrocycle prepared
on a several hundred milligram scale by solution chemistry was characterized
by single-crystal X-ray analysis and was furthermore extended toward
next generation honeycomb species. Investigation of the photophysical
and electronic properties together with the good thermal stability
revealed the potential of MC6 as hole-transport material
for organic electronics.