Triple Helical Assembly of Atomically Precise Silver Cluster Assembled Material: A p-type Semiconductor

The construction of helical architectures from achiral building blocks remains a fundamental challenge in supramolecular and materials chemistry. We report the first triple-helical clusterassembled material constructed entirely from achiral components via covalent coordination. Thiolprotected Ag12 nanoclusters are linked by rigid 4,4′-bipyridine ligands to form a three-dimensional framework with a unique triple-helical topology. Structural analysis shows that the helicity arises 2 solely from the spatial arrangement of cluster nodes and linkers, without chiral precursors or templates. The material exhibits p-type semiconducting behavior with a conductivity of ~10-6 S/ cm and hole mobility of ~1.7 cm2 /Vs, highlighting its potential for electronic and optoelectronic applications.