Formation, structure, and topotactic exchange reactions of the layered hydrogen bronze HxV3O8

Abstract

On reaction of the non-stoicheiometric vanadium bronze Li_1+xV₃O₈ with aqueous acids a novel type of layered hydrogen bronze H_1+xV₃O₈·nH₂O (1; monoclinic lattice parameters: a= 10·27 b= 3·61, c= 12·42 Å, β= 112·5°), which exhibits Brönsted acid and polyelectrolyte character, is obtained in a topotactic process; reaction of (1) with organic Lewis bases L results in the formation of a new class of layered intercalation complexes L_nH_1+xV₃O₈.