Selective synthesis of strained [7]cycloparaphenylene: an orange-emitting fluorophore

n]Cycloparaphenylenes, which are short fragments of carbon nanotubes, have unique size-dependent optical properties. In this communication, we describe the first synthesis of 7]cycloparaphenylene (7]CPP), the smallest cycloparaphenylene prepared to date. In order to access this structure, we have developed a synthetic route that capitalizes on successive orthogonal Suzuki-Miyaura coupling reactions. 7]CPP has 83 kcal/mol of strain energy and an orange emission at 592 nm.