Record High-Nuclearity Polyoxoniobates: Discrete Nanoclusters {Nb114 }, {Nb81 }, and {Nb52 }, and Extended Frameworks Based on {Cu3 Nb78 } and {Cu4 Nb78 }.

Record High-Nuclearity Polyoxoniobates: Discrete Nanoclusters {Nb114 }, {Nb81 }, and {Nb52 }, and Extended Frameworks Based on {Cu3 Nb78 } and {Cu4 Nb78 }.