Having a gas: Topotactic exchange (65 %) of γ‐zirconium phosphate with terphenyldiphosphonic acid yielded a pillared material with a specific area of 90 m2 g−1. Subsequent treatment with hypophosphorous acid afforded a material of α type, with no incorporated hypophosphite and a specific area of 400 m2 g−1, which took up 74 cm3g−1 of H2 at 650 Torr and 77 K.

No abstract

Electron donors based on Ru(bpy)3 (bpy = 2,2′‐bipyridine) are covalently attached to the walls of γ‐ZrP and acceptor species based on viologen are arranged side by side following quite simple experimental protocols. The resulting materials are characterized by using the usual techniques and their luminescence and electrochemical properties are assessed. Strong evidence is presented of the efficient occurrence of photoinduced electron transfer in the solid state among the active species attached to the transparent inorganic matrix. The prepared materials may find applications in the clean conversion of light into useful energy.

The construction of organic−inorganic scaffolds based on γ-zirconium phosphate and polyethylenoxa diphosphonates is described. Microcrystalline materials with a controlled, low degree of pillaring are synthesized and characterized by elemental analysis, X-ray powder diffraction, solid-state NMR, and thermogravimetric analysis. The mechanism for the topotactic polyethylenoxa-pillaring reaction is proposed and confronted with previous ones suggested for the reaction of nonpolar organic diphosphonates. The affinity among the polyethylenoxa chains and the superficial acidic phosphates of the layered salt is thus clearly evidenced. The work shows how the inner structure of the pillared microcrystals may be easily modified by a second exchange of the remaining superficial phosphates by other phosphorus species as the low-polar hypophosphite. The rigidity of the layers and the wedge-like effect of intercalated amines at the edges of the microcrystals cause them to increase the interlayer distance, and hence porosity, in a flash fashion.

No abstract