Synthesis and characterization of a new organic–inorganic hybrid zinc borate: [Zn(dab)0.5(dab′)0.5(B4O6(OH)2)]·H2O

A new organic–inorganic hybrid zinc borate [Zn(dab)0.5(dab′)0.5(B4O6(OH)2)]·H2O has been hydrothermally synthesized by using 1,4-diaminobutane (dab) as the linkers and characterized by means of elemental analysis, IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction, respectively. This compound crystallizes in the monoclinic space group P21/c, a = 9.997(3) Å, b = 8.371(3) Å, c = 16.321(4) Å, β = 111.7(1)°, V = 1268.8(7) Å3, Z = 4. The structure contains ZnO2N2 tetrahedra, 1,4-dab and B4O7(OH)2 clusters, which interconnect to form a new three-dimensional framework.

Graphical abstractA new organic–inorganic hybrid zinc borate [Zn(dab)0.5(dab′)0.5(B4O6(OH)2)]·H2O has been made under hydrothermal conditions. In the structure, the B4O7(OH)2 cluster units are linked each other to produce a 1-D helical chain and further linked by the Zn2(dab) bridges to form a 2-D layer, which are further connected by another dab′ linkers, resulting in a 3-D open-framework.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A new organic–inorganic hybrid zinc borate [{Zn(dab)0.5(dab′)0.5}{B4O8H2}]·H2O has been hydrothermally made. ► It contains ZnO2N2 tetrahedra, dab and B4O7(OH)2 clusters, which links to form a new 3-D framework. ► It represents the first example of zinc borate expanding from 1-D to 2-D/3-D linked through organic amine molecules.