Frontispiece: Nitrogen Donor Protection for Atomically Precise Metal Nanoclusters

For the first time, metal-nitrogen interfaces in metal nanoclusters are resolved at atomic level. The synthetic methods, total structure determination and properties of metal nanoclusters protected by N-donor ligands are covered. It is expected that this review could stimulate the study of structural control and functional modulation of metal nanoclusters with the protection of functionalized N-donor ligands.