Abstract
An open-framework borate [Zn(H2O)4][B6O10] with acentric structure, has been successfully obtained for the first time under solvothermal conditions. It has been characterized by powder and single crystal X-ray diffraction, IR spectroscopy, diffuse-reflectance spectroscopy and thermogravimetric (TG) analyses, respectively. It crystallizes in the orthorhombic system, space group Pna21, a=11.3140(6) Å, b=11.8995(7) Å, c=8.6140(5) Å and Z=4. In the structure, the alternative connections between [B3O7] units give rise to an unprecedented 3D borate framework with 11- and 10-MR channels, in which the [Zn(H2O)4]2+ complexes are located. It has a cut-off edge below 200nm and exhibits second harmonic generation (SHG) efficiency approximately 0.4 times that of KH2PO4 (KDP).
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