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6673791 
Journal Article 
Synthesis and Structural Manipulation of a Polyanionic Zincoborate [Zn(H2O)(6)](NO3)(2)center dot[Zn{B3O3(OH)(4)}(2)(H2O)(4)]center dot 2H(2)O by the Molten Salt Method and its Potential Application as a Flame Retardant 
Liu, Y; Deng, J; Pan, CY; , 
2020 
Yes 
Journal of Cluster Science
ISSN: 1040-7278
EISSN: 1572-8862 
SPRINGER/PLENUM PUBLISHERS 
NEW YORK 
32 
2 
469-477 
WOS:000530179600001 
A polyanionic borate [Zn(H2O)(6)](NO3)(2)center dot[Zn{B3O3(OH)(4)}(2)(H2O)(4)]center dot 2H(2)O (1) have been synthesized by a molten salt method in this work. Its crystal structure consists of [B3O3(OH)(4)](-) cluster and NO3- anions. Zn2+ cations are covalently bonded to the polyanionic clusters and water molecules leading to a [Zn(H2O)(6)] octahedron and a [Zn{B3O3(OH)(4)}(2)(H2O)(4)] cluster, which are connected by hydrogen bonds (H-Bs) to form a fictitious 3D structure, in which the NO3- anion are filled in the void. Crystal data for 1 is as following: Monoclinic, P2(1)/c, a = 11.2817(12)A, b = 6.5374(7)A, c = 17.668(2)A, alpha = 90.00 degrees, beta = 100.981(5)degrees, gamma = 90.00 degrees, Z = 2. Two isostructural compounds, [Co(H2O)(6)](NO3)(2)center dot[Co{B3O3(OH)(4)}(2)(H2O)(4)]center dot 2H(2)O (2) and [Ni(H2O)(6)](NO3)(2)center dot[Ni{B3O3(OH)(4)}(2)(H2O)(4)]center dot 2H(2)O (3) have been obtained by similar molten salt method, indicating the structure of 1 can be manipulated by replacement of Zn2+ with Co2+ or Ni2+. Structures of the borates have been further confirmed by element analysis, FTIR, PXRD, TG, and UV-vis diffusion reflectance spectra. The bandgap of the borates showed a tunable performance with a change of metallic ions. Furthermore, we studied that flame retardant property of 1 by mixing it with Acrylonitrile Butadiene Styrene (ABS). The cone calorimetry tests confirmed that ABS/1 composites with 15 wt% loading of 1 exhibited superior performance.