The tunable luminescent property and wide band gap in three 1D hybrid templated borates containing different metallic ions and oxoboron clusters

Abstract Our systematic exploration of chainlike borate in the hybrid templated borate systems has led to three new borates, namely, [GaTETA]·[B5O8(OH)2]·H2O, [InTETA]·[B5O8(OH)2]·1.5H2O, and [Cd(1,2-dap)]·[B6O11(OH)2]·H2O. The structure of the three borates was determined by single-crystal X-ray diffraction. [Cd(1,2-dap)]·[B6O11(OH)2]·H2O represents the first example of chainlike borate containing Cd2+ transition metal cations and [B6O11(OH)2] cluster. [GaTETA]·[B5O8(OH)2]·H2O is isostructural with [InTETA]·[B5O8(OH)2]·1.5H2O, whose structure features a one-dimensional (1D) polyatomic chain constructed of MO2N4 octahedron and [B5O8(OH)2] groups, such chains are further bridged by HBs resulting in a three-dimensional (3D) supermolecular network. Optical and luminescent property measurements have also been performed on the three compounds. Only fluorescence intensity of [GaTETA]·[B5O8(OH)2]·H2O decreased fiercely with temperature increasing. Besides that, the band gap of [GaTETA]·[B5O8(OH)2]·H2O and its isomer [InTETA]·[B5O8(OH)2]·1.5H2O and [Cd(1,2-dap)]·[B6O11(OH)2]·H2O are very distinct from each other, it may indicate that optical and luminescent property of hybrid borate can be manipulated by adjusting of polyatomic cluster and metallic ion.