高等学校化学学报

高等学校化学学报 ›› 1983, Vol. 4 ›› Issue (5): 658.

• 研究简报 • 上一篇    下一篇

吸附在活性Al2O3上的TEMPONE自由基ESR谱

岳世泰, 宋瑞方   

  1. 吉林大学理论化学研究所
  • 收稿日期:1982-03-06 出版日期:1983-10-24 发布日期:1983-10-24

THE ESR SPECTRA OF TEMPONE RADICAL ADSORBED ON THE ACTIVATED Al2O3

Yue shitai, Song Ruifang   

  1. Institute of Theoretical Chemistry, Jilin University, Changchun
  • Received:1982-03-06 Online:1983-10-24 Published:1983-10-24

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摘要： 近来,用ESR方法研究吸附在催化剂载体表面上的氧氮自由基行为引起了广泛的兴趣,Lozos等[1]观察到DTBN在Al3O3-SiO3等载体上有两种谱:一种是14N(I=1)所引起的三重谱;另一种是27Al(I=5/2)引起的六重谱。

Abstract: The ESR spectra of TEMPONE radical on the activated Al2O3 were studied. It is found out that the ESR spectra of well-resolved nitrogen hyperfine splittings from TEMPONE adsorbed at two distinct types of sites can only be obtained when the Al2O3 must be treated previously with the steam at elevated temperature to increase the adsorbed hydroxyl group on the Al2O3 surface. The nitrogen hyperfine constant AN increases with the increasing of Lewis acid strength.Thus it may be used as a measure of the strength of the surface acid.

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