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

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)111-123
ページ数13
ジャーナルApplied Magnetic Resonance
45
2
DOI
出版ステータス出版済み - 6 1 2014

All Science Journal Classification (ASJC) codes

  • 原子分子物理学および光学

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