Novel sheet-like supramolecular architectures constructed from infinite hydrogen-bonded, protonated adenine–water–halide and polyiodide ribbons

Abstract

A series of novel supramolecular architectures are constructed from self-assembly of adenine (Ade), hydrogen halide and polyiodides. They are [AdeH₂²⁺](X⁻)(I₅⁻)(H₂O) [1, X = Cl; 2, X = Br] and [AdeH₂²⁺](I₆²⁻)(H₂O)₂ (3). All three architectures are sheet-like nanosized structures made up of alternately arranged positive and negative ribbons of ca. 1 nm width. The positive ribbon is built by halide anions or iodide–water pair bridged (AdeH₂²⁺)₂ dimers with extra water acceptors through hydrogen bonds, and the negative ribbon is constructed from twinned zigzag polyiodide chains. Both ribbons are zigzag shaped and have good complementarity in the shape, size, charge and inter-ribbon interactions in the architectures.