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Citation: Hu Chang-Wen, Liu Yan-Yong, Wang Zuo-Ping, Zhang Ji-Yu, Wang En-Bo. Structural Model and Esterification Activity of Zn₂Al-PW₁₁Z Pillared Compounds[J]. Acta Physico-Chimica Sinica, ;1995, 11(09): 769-772. doi: 10.3866/PKU.WHXB19950901 shu

Structural Model and Esterification Activity of Zn₂Al-PW₁₁Z Pillared Compounds

1.
Department of Chemistry,Northeast Normal University,Changchun 130024

Received Date: 18 April 1995
Available Online: 15 September 1995

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.
- Anionic clay,
- Heteropolyoxometalates,
- Structural model,
- Layer-Pillared compound,
- Esterification activity
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Structural Model and Esterification Activity of Zn2Al-PW11Z Pillared Compounds

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Structural Model and Esterification Activity of Zn₂Al-PW₁₁Z Pillared Compounds