期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 613, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2023.122359
关键词
Chalcogenide; Glass structure; Raman spectroscopy; NMR spectroscopy; Glass transition
The atomic structure of glass along the P4Se3-As4Se3 join with different compositions was studied using various spectroscopic techniques. The results showed the coexistence of cage-like molecular moieties and corner-shared network moieties in these glasses. The increase in substitution of As with P correlated with an increase in the ratio of molecules to network, which also affected the glass transition temperature.
The atomic structure of unusually molecule-rich glasses along the P4Se3-As4Se3 join with 0 to 70 mol% P4Se3 is studied using Raman, 77Se magic-angle-spinning (MAS) and 2D 31P phase adjusted spinning sideband (PASS) nuclear magnetic resonance (NMR) spectroscopy. When taken together, the spectroscopic results indicate the coexistence of cage-like PxAs4-xSe3 molecular moieties and corner-shared P-and As-containing pyramidal network moieties in the structure of these glasses. Increasing substitution of As with P gives rise to a monotonic increase in the total molecule:network ratio, which is shown to be consistent with the compositional variation in the glass transition temperature.
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