Steering on-surface reactions through molecular steric hindrance and molecule-substrate van der Waals interactions.

ABSTRACT: On-surface synthesis is a rapidly developing field involving chemical reactions on well-defined solid surfaces to access synthesis of low-dimensional organic nanostructures which cannot be achieved via traditional solution chemistry. On-surface reactions critically depend on a high degree of chemoselectivity in order to achieve an optimum balance between target structure and possible side products. Here, we demonstrate synthesis of graphene nanoribbons with a large unit cell based on steric hindrance-induced complete chemoselectivity as revealed by scanning probe microscopy measurements and density functional theory calculations. Our results disclose that combined molecule-substrate van der Waals interactions and intermolecular steric hindrance promote a selective aryl-aryl coupling, givin

SUBMITTER: Wang S 

PROVIDER: S-EPMC9809985 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature