A Three-Dimensional (3D) Indium-Containing Polyoxoniobate Framework Based on {In 5 Nb 71 } n Helical Pillars.

A rare 3D Indium-containing polyoxoniobate framework {H 9 [Cu(en) 2 (H 2 O) 2 ][Cu(en) 2 ] 12 [In(en)] 5 [Nb 23 -O 65 (OH) 3 (H 2 O) 2 ]{Nb 24 O 67 (OH) 2 (H 2 O) 3 ] 2 }·68H 2 O( 1 ), based on the In-containing polyoxoniobate cluster, {[In(en)] 5 [Nb 23 O 65 (OH) 3 (H 2 O) 2 ][Nb 24 O 67 (OH) 2 (H 2 O) 3 ] 2 } 35- ({In 5 Nb 71 }) and [Cu(en) 2 ] 2+ linkers has been successfully synthesized. The nest-like cluster {In 5 Nb 71 } is constructed from one brand-new V-shaped {Nb 23 O 70 }, two triangle-shaped {Nb 24 O 72 } and five [In(en)] 3+ . The [In(en)] fragments link {Nb 24 O 72 } and {Nb 23 O 70 } units into unique {In 5 Nb 71 } n helical pillars. The copper-amine complexes connect the {In 5 Nb 71 } n helical pillars into a three-dimensional (3D) inorganic-organic hybrid In-Cu-containing framework. This material also exhibits good ionic conductivity and vapor adsorption capacity properties.