KCS Publications

HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 3
BKCSDE 30(3)
March 20, 2009

Title	Solid-state MAS NMR Investigation on the Local Structures of xV₂O₅-B₂O₃-yNa₂O Glasses
Author	Sun Ha Kim, Oc Hee Han*, Jae Pil Kang, Seung Ki Song
Keywords	Glass structure, Nuclear magnetic resonance, MAS NMR
Abstract	The local structures of the boron and vanadium sites in the ternary glass xV₂O₅-B₂O₃-yNa₂O were studied by ¹¹B and ⁵¹V magic angle spinning (MAS) nuclear magnetic resonance (NMR). With increasing x, the mole ratios of the BO₃ and BO₄ structures were enhanced, as were the quadrupole asymmetry parameters for the BO₃ structures, while the quadrupole coupling constants for the sites were reduced. However, the opposite trends were observed with increasing y, implying that V₂O₅ and Na₂O play opposite roles. The VO₄, VO₅ and VO₆ structures with all oxygens bonded to the vanadium neighbors were identified. Vanadiums bonded to the greater number of oxygens were more populated at higher contents of Na₂O and V₂O₅. In addition, the VO₄ structures with at least one oxygen bonded to boron instead of vanadium were detected at low Na₂O contents. The electron densities of various vanadium oxide structures were affected by the weight densities and vanadium ion densities. The VO₄ structures were more likely to be vanadium oxide structures right next to V⁴⁺ ions.
Page	608 - 612
Full Text	PDF

How to access to the WOL for The Bulletin of the Korean Chemical Society ?

The Bulletin of the Korean Chemical Society will be co-published with Wiley-VCH from 2015 towards. The online version of the Journal will thus be available on Wiley Online Library, Wiley(-VCH)'s global online platform.

KCS members can get a free online access to the Bulletin of the Korean Chemical Society in WOL.

Free Access to WOL