Tri- and tetranuclear molybdenum and tungsten chalcogenide clusters: on the way to new materials and catalysts *

Data on the electronic structure and redox, magnetic, luminescent, nonlinear optical and catalytic properties of tri- and tetranuclear molybdenum and tungsten chalcogenide clusters are analyzed and integrated. The prospects for the applications of this family of clusters for the design of new materials for molecular electronics, nonlinear optics and catalysis are considered. The bibliography includes 202 references.