π-conjugated molecules are viewed as fundamental components in forthcoming molecular nanoelectronics, in which semiconducting functional units are linked to each other via metallic molecular wires. In this study, we present a synthesis of [18]-polyene linked Zn-porphyrin cooligomers as large π-conjugated molecular system on Cu surfaces. Nonyl groups (-C9H19) substituted at the 5,15-meso positions of Zn-porphyrin were first transformed to alkenyl groups (-C9H10) by dehydrogenation. Subsequently, homocoupling of the terminal -CH2 groups resulted in the formation of extended [18]-polyene linked porphyrin cooligomers. This finding provides an approach to fabricate complex nano-carbon structures on surface. Figure. (a) Chemical reaction pathways for synthesizing [18]-polyene linked porphyrin cooligomers. (b) Corresponding high-resolution scanning tunneling microscopy image.

Created at: 2024-06-04 03:13:09 +0900 Updated at: 2026-09-07 08:55:20 +0900