Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (6): 1092.

• Letters • Previous Articles     Next Articles

Studies on 27Al and 29Si NMR Spectroscopies of Sodium Aluminosilicate Solutions

LI Cai-Jin, LI Shou-Gui, XIAO Feng-Shou*   

  1. State Key Lab of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2008-12-31 Online:2009-06-10 Published:2009-06-10
  • Contact: XIAO Feng-Shou, E-mail: fsxiao@jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20773049)资助.

Abstract:

Aluminosilicate zeolites as one of the most important catalytic materials are widely applied in industrial reactions, and understanding of their synthetic mechanism is one of key factors in this field. 27Al and 29Si NMR techniques are one of powerful tools for characterization of zeolite synthesis, but unfortunately the study on 27Al NMR spectra of aluminosilicate solutions is still argumentative, and the assignment of aluminosi-licate species in the solutions are challengeable. In this work, we have carefully compared 27Al NMR spectra of various aluminosilicate solutions, harmonizing the assignments reported previously. Furthermore, we assigned 29Si NMR spectra related to Al species. The peaks at δ: -75.1 and -82.5 in 29Si NMR spectrum are related to Q2 Al species, the peaks at δ: -84.5 and -90.8 are related to Q3 and Q4 Al species in aluminosilicate solutions, respectively.

Key words: 27Al NMR spectroscopy, 29Si NMR spectroscopy, Sodium aluminosilicate solution

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