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Two novel 3D borates: porous-layer and layer-pillar framework

Abstract

Two new borates NaK1.5[B{B5O9(OH)}{B5O8(OH)2}1/2] (1) and Na3.5[Al{B3O6(OH)}{B5O10}1/2{BO(OH)}] (2) have been made by solvothermal method. Structure 1 was made of two types of oxoboron clusters ([B5O9(OH)]4- and [B5O8(OH)2]3-) and BO4 tetrahedra to form 3D porous layer, in which the [B5O9(OH)]4- clusters are bridged by BO4 groups to produce 2D B-O layer with 11-membered ring (MR) windows, while the [B5O8(OH)2]3- cluster as the 2-connected pillars join adjacent B-O layers to make 3-D porous layer. Structure 2 is built by two types of oxoboron clusters ([B3O6(OH)]4- and [B5O12]9-), AlO4 units and BO2(OH) triangles to produce 3D pillar-layered alunminoborate (ABO), where the [B5O12]9- clusters linked together to form 2-D B-O layer; the [B3O6(OH)]4- clusters and AlO4 groups join each other to form 1D tubular ABO; the BO2(OH) triangles act as the linkers to connect adjacent B-O layer and tube, resulting in 3D pillar-layered ABO. Interestingly, the ABO tubes decorated with the BO2(OH) triangles act as the pillars for using to make 3D layer-pillared structure. The UV-Vis diffuse spectra indicate that both have cut-off edges below 190 nm, and the calculated band gaps are 5.75 and 5.78 eV, respectively.

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Publication details

The article was received on 30 Sep 2019, accepted on 28 Oct 2019 and first published on 29 Oct 2019


Article type: Paper
DOI: 10.1039/C9DT03867A
Dalton Trans., 2019, Accepted Manuscript

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    Two novel 3D borates: porous-layer and layer-pillar framework

    D. Qin, T. Zhang, C. Ma and G. Yang, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03867A

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