Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Lone-pair effects and structural trends in xSNO·(1-x)P2O5 glasses deduced from 31P and 119Sn nuclear magnetic resonance
AU - Holland, D.
AU - Howes, A.P.
AU - Smith, M.E.
AU - Hannon, A.C.
PY - 2002
Y1 - 2002
N2 - Tin phosphate glasses, of general formula xSnO·(1 - x)P2O5(0.3 < x < 0.8), have been prepared by conventional melt-quench techniques and their structures studied using 31P and 119Sn nuclear magnetic resonance. The distribution of [PO4] Qn species changes with composition in accordance with the simple binary model, and the changes in chemical shift can be explained by the redistribution of electron charge from the P=O double bond. Sn(II) is found to occupy a highly asymmetric site, typical of a sterically active lone pair of electrons. The 119Sn parameters of the chemical shift tensor change systematically with x, reflecting the change in local environment from one where the next nearest neighbours are predominantly Q2 phosphorus to one where they are predominantly Q0 phosphorus.
AB - Tin phosphate glasses, of general formula xSnO·(1 - x)P2O5(0.3 < x < 0.8), have been prepared by conventional melt-quench techniques and their structures studied using 31P and 119Sn nuclear magnetic resonance. The distribution of [PO4] Qn species changes with composition in accordance with the simple binary model, and the changes in chemical shift can be explained by the redistribution of electron charge from the P=O double bond. Sn(II) is found to occupy a highly asymmetric site, typical of a sterically active lone pair of electrons. The 119Sn parameters of the chemical shift tensor change systematically with x, reflecting the change in local environment from one where the next nearest neighbours are predominantly Q2 phosphorus to one where they are predominantly Q0 phosphorus.
KW - Chemical bonds
KW - Composition
KW - Electrons
KW - Nuclear magnetic resonance spectroscopy
KW - Phosphorus
KW - Tin compounds
KW - Chemical shift tensor
KW - Conventional melt-quench techniques
KW - Electron charge
KW - Lone-pair effects
KW - Tin phosphate glasses
KW - Glass
U2 - 10.1088/0953-8984/14/49/315
DO - 10.1088/0953-8984/14/49/315
M3 - Journal article
VL - 14
SP - 13609
EP - 13621
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 49
ER -