Direct detection of Al-O-Al structure in aluminosilicate specimens: A use of homo-nuclear DQMAS NMR

Xiongchao Lin, Keiko Ideta, Jin Miyawaki, Yonggang Wang, Yusuke Nishiyama, Seongho Yoon, Isao Mochida

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A general strategy of Al-O-Al structure in various aluminosilicate was evaluated by combining triple-quantum magic angle spinning (3QMAS) and double-quantum homo-nuclear correlation under magic angle spinning (DQMAS) solid-state nuclear magnetic resonance (NMR) measurements with the aid of high magnetic field NMR (800 MHz for 1H Larmor frequency). The results show that in many cases the direct detection of Al-O-Al sites in aluminosilicate crystals and glasses is possible; hence the extent of aluminum avoidance can be directly elucidated. Specifically, experimental evidence of Al-O-Al linkages in several aluminosilicate materials with Si/Al [1 was straightforwardly confirmed; and the existence of Al-O-Al is considered to have little correlation with the Si/Al ratio, but it may be strongly related to the cation and local structural arrangement. In addition, the presence of tri-clusters of (Si, Al)O4-tetrahedra in aluminosilicate framework was proposed, which was thought to act as nuclei for formation and incorporation of cations to achieve charge neutrality.

Original languageEnglish
Pages (from-to)111-123
Number of pages13
JournalApplied Magnetic Resonance
Volume45
Issue number2
DOIs
Publication statusPublished - Jun 1 2014

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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