中文 |

Newsroom

Solid-state Nuclear Magnetic Resonance Helps Reveal the Structure of Rare Earth-doped Fluoroborosilicate Glasses

Apr 14, 2020

Rare-earth ion (REI) doped transparent oxyfluoride glasses have attracted great attention in recent years owing to their numerous potential applications in optical communications, multicolor displays, laser amplification, saturable absorbers, solar cells, etc. The local structures of glasses have significant effect on the luminescence properties of REI. Although considerable luminescence performances have been reported for these materials, the fundamental local structure information is rarely reported.

Recently, researchers from Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences (SIOM, CAS) have reported a thorough structural investigation of fluoroborosilicate glasses by means of multiple solid-state nuclear magnetic resonance (SSNMR) techniques. The results were published in The Journal of Physical Chemistry C.

In their experiment, they first used 11B triple-quantum magic angle spinning (TQMAS) and J-coupling based 11B {19F} heteronuclear multiple quantum coherence (J-HMQC) methods to identify two types of B(4) species in glass. The F- species were confirmed by 19F MAS spectra and 19F {23Na} rotational echo double resonance (REDOR) method, revealing the existence of Na–F–B and multiple Na–F–Y linkages.

Y3+ ions have much stronger competition ability in capturing F- ions than B3+. The clustering of F- ions was proved by 19F static spin echo method. The distribution of Na+ around B(3)/B(4) species was detected by 11B {23Na} REDOR experiment. On the basis of these results, the structure dependence on compositions was investigated.

These results are significant in promoting the understanding of structure dependence on compositions of fluoroborosilicate glasses and the preparation of REI-doped oxyfluoride glasses and glass ceramics with special optical properties.

This work is supported by the National Nature Science Foundation of China.

Structural study of rare earth-doped fluoroborosilicate glasses. (Image by SIOM)

Contact

CAO Yong

Shanghai Institute of Optics and Fine Mechanics

E-mail:

Structural Studies of Rare Earth-Doped Fluoroborosilicate Glasses by Advanced Solid-State NMR

Related Articles
Contact Us
  • 86-10-68597521 (day)

    86-10-68597289 (night)

  • 86-10-68511095 (day)

    86-10-68512458 (night)

  • cas_en@cas.cn

  • 52 Sanlihe Rd., Xicheng District,

    Beijing, China (100864)

Copyright © 2002 - Chinese Academy of Sciences