Add time:08/27/2019         Source:sciencedirect.com

Three new organically templated beryllium phosphate and phosphites, [C2H8N][Be2(PO4) (HPO4) (H2O)]·(H2O)0.5 (1), [C3H12N2][Be3(HPO3)4] (2) and [C6H18N2][Be3(HPO3)4] (3), have been synthesized and structurally characterized by single-crystal X-ray diffraction analyses. The structure of 1 consists of BeO4 and PO4 tetrahedra, displaying a double-layered structure with [Be4(PO4)2(HPO4)2(H2O)2] D4R-analogue as SBUs. Compound 2 presents a three-dimensional (3D) interrupted open-framework, constructed from two-dimensional layers pillared by phosphite nodes. Left- and right-handed helical channels occurred along the [010] direction in 2. For 3, adjacent sheets arrange in an –ABAB– staggered stacking mode to give a (3,4)-connected 3D structure with zigzag 12-ring channels. In 1–3, different protonated amine templates reside in the voids of structures and interact with the inorganic frameworks through hydrogen-bonds.

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