物理化学学报 >> 1995, Vol. 11 >> Issue (09): 769-772.doi: 10.3866/PKU.WHXB19950901

通讯    下一篇

柱撑化合物Zn2Al-PW11Z的结构模型及酯化活性

胡长文,刘彦勇,王作屏,张继余,王恩波   

  1. 东北师范大学化学系,长春 130024
  • 收稿日期:1995-04-18 修回日期:1995-06-19 发布日期:1995-09-15
  • 通讯作者: 王恩波

Structural Model and Esterification Activity of Zn2Al-PW11Z Pillared Compounds

Hu Chang-Wen,Liu Yan-Yong,Wang Zuo-Ping,Zhang Ji-Yu,Wang En-Bo   

  1. Department of Chemistry,Northeast Normal University,Changchun 130024
  • Received:1995-04-18 Revised:1995-06-19 Published:1995-09-15
  • Contact: Wang En-Bo

关键词: 阴离子粘土, 杂多阴离子, 结构模型, 酯化活性, 层柱化合物

Abstract:

Anionic clays pillared by heteropolyoxometalate Zn2Al-PW11Z (Z= Cr3+ , Ti4+ and V5+) were synthesized via ion exchange reaction. The IR spectra and XRD patterns showed that the layered anions remained the integrity of Keggin structure, and the gallery heights of the layered compounds were 1.01± 0.01 nm. The MAS NMR spectra of 27Al and 31P indicated the layered anion had little effect on the Al of the octahedra center of the hydroxide, but the layer and octahydron VO6 had great effect on the P of the layered PW11V. The peak of 31P MAS NMR split to the two peaks of -11.867 ppm and -14.031 ppm whose corresponding area retio is 2:1. All these results showed that the C2 axia of the heteropolyoxometalate in the layer was perpendicular to the brucite layer. Further experiments found that these compounds had high selectivity and activity for the esterification of acetic acid with n-butyl alcohol.

Key words: Anionic clay, Heteropolyoxometalates, Structural model, Layer-Pillared compound, Esterification activity