Square-Pyramidal/Triangular Framework Oxide: Synthesis and Structure of PKU-6
journal contributionposted on 11.06.2007 by Tao Yang, Jing Ju, Guobao Li, Fuhui Liao, Xiaodong Zou, Feng Deng, Lei Chen, Yingxia Wang, Jianhua Lin
Any type of content formally published in an academic journal, usually following a peer-review process.
PKU-6, a new aluminoborate (HAl2B3O8), has been synthesized in a closed system at 400 °C. The structure of PKU-6, characterized by using powder and single-crystal X-ray diffraction, consists of AlO5 square-pyramidal chains and B3O7 groups, which are interconnected and form a three-dimensional framework. The 27Al NMR study indicates that the isotropic chemical shift of pyramidal Al is 34.6 ppm with a large quadrupolar coupling constant (CQ = 4.2 MHz), mainly due to a nonspherical coordination environment.