title: Organotemplate-free synthesis of two open-framework metal borophosphates.
abstract: Two new isostructural metal borophosphates, |K2(H2O)|[CoB2P3O12(OH)] [M = Co (1), Ni (2)], have been hydrothermally synthesized with non-polluting K(+) ions instead of organic template-ethylenediamine. The two metal borophosphates are isostructural and constructed by the connection of tetrahedral layers and MO6 octahedra, giving rise to the 3-D intersecting 8-ring channels along the [010] direction. The negative charge of the framework is compensated by the K(+) ions located in the 8-ring channels. Like ethylenediamine, the K(+) ions also play an important structural directing role in the formation of the open framework. The framework shows a high thermal stability and is stable upon calcination at ca. 400 and 500 °C for 1 and 2, respectively. Considering the motion of K(+) ions, ionic conductivities of the two compounds were performed. The results indicated that they have similar activation energies of 0.94-1.09 eV and conductivities of 6.76 × 10(-8)-9.88 × 10(-8) S cm(-1) at 320 °C.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P.R. China. hmyuan@jlu.edu.cn.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.forename: Yuquan
authors.initials: Y
authors.lastname: Feng
authors.forename: Yunling
authors.initials: Y
authors.lastname: Liu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guanghua
authors.initials: G
authors.lastname: Li
authors.forename: Hongming
authors.initials: H
authors.lastname: Yuan
mesh_terms: D001896:Boron Compounds / Q000138:chemical synthesis*; D008670:Metals; D015394:Molecular Structure; D010710:Phosphates / Q000138:chemical synthesis*; D014961:X-Ray Diffraction
chemical_list: D001896:Boron Compounds; D008670:Metals; D010710:Phosphates