An open-framework beryllium phosphite with extra-large 18-ring channels.

A novel open-framework beryllium phosphite, [H4tren][Be6(HPO3)8]·(H2O)3 (1, tren = tris(2-aminoethyl)amine), was synthesized under solvothermal conditions. Its structure features a 3D interrupted network with a low density (1.594 g cm−3), and 1 represents the first example of a beryllium phosphite material with extra-large 18-ring channels. [ABSTRACT FROM AUTHOR]