Unprecedented (3,10)-connected 2-D metal-organic framework constructed from octanuclear cobalt(II) clusters and a new bifunctional ligand.

A metal-organic framework with the highest connectivity of 2-D topology was first assembled from an octacobalt(II) cluster as a 10-connected node and a new bifunctional ligand 1-(3,5-dicarboxy-phenyl)-4-phenyl-1H-1,2,3-triazole as a 3-connected node as well as "double bridge" linkers.