Expanded Analogs of Three-Dimensional Lead-Halide Hybrid Perovskites.

Replacing the Pb-X octahedral building unit of A PbX perovskites (X=halide) with a pair of edge-sharing Pb-X octahedra affords the expanded perovskite analogs: A Pb X . We report seven members of this new family of materials. In 3D hybrid perovskites, orbitals from the organic molecules do not participate in the band edges.

Reactivity of NO with Porous and Conductive Copper Azobispyridine Metallopolymers.

We report the reactivity of copper azobispyridine (abpy) metallopolymers with nitrogen dioxide (NO). The porous and conductive [Cu(abpy)] mixed-valence metallopolymers undergo a redox reaction with NO, resulting in the disproportionation of NO gas. Solid- and gas-phase vibrational spectroscopy and X-ray analysis of the reaction products of the NO-dosed metallopolymer show evidence of nitrate ions and nitric oxide gas.

Carving Out Pores in Redox-Active One-Dimensional Coordination Polymers.

Reduction of the insulating one-dimensional coordination polymer [Cu(abpy)PF ] , 1 a(PF ), (abpy=2,2'-azobispyridine) yields the conductive, porous polymer [Cu(abpy)] , 2 a. Pressed pellets of neutral 2 a exhibit a conductivity of 0.093 S cm at room temperature and a Brunauer-Emmett-Teller (BET) surface area of 56 m  g .

Electronic Conductivity in a Porous Vanadyl Prussian Blue Analogue upon Air Exposure.

Exposure to humid O or ambient air affords a 5-order-of-magnitude increase in electronic conductivity of a new Prussian blue analogue incorporating Co and V-oxo units. Oxidation produces a mixed-valence framework, where the O exposure time controls the V/V ratio and thereby the material's conductivity. The oxidized framework shows an intervalence charge-transfer band at ca.