TY - JOUR
T1 - High-resolution solid-state NMR of quadrupolar nuclei
AU - Oldfield, Eric
AU - Timken, Hye Kyung C.
AU - Montez, Ben
AU - Ramachandran, R.
PY - 1985
Y1 - 1985
N2 - Quadrupolar nuclei are the most abundant nuclear magnetic resonance (NMR)-receptive nuclei in the Earth's crust, and in many amorphous materials of technological interest (such as zeolite catalysts, ceramics and alloys), and have thus been intensively studied1-7. Of particular interest is the ability to resolve and quantitate the various types of sites present in a given material. Here we present a very simple, yet we believe powerful, approach towards the resolution of chemically non-equivalent sites in solids, which combines a conventional high-field spin-echo NMR method with the resolution enhancement of the 'quadrupole shift' approach4,7. We demonstrate its application to the complete resol-ution of both the (1/2, 3/2) and (3/2, 5/2) transitions of the 27Al nuclei in a mixture of potassium and ammonium alums (KAl(SO4)2·12H2O and NH 4Al(SO4)2·12H2O).
AB - Quadrupolar nuclei are the most abundant nuclear magnetic resonance (NMR)-receptive nuclei in the Earth's crust, and in many amorphous materials of technological interest (such as zeolite catalysts, ceramics and alloys), and have thus been intensively studied1-7. Of particular interest is the ability to resolve and quantitate the various types of sites present in a given material. Here we present a very simple, yet we believe powerful, approach towards the resolution of chemically non-equivalent sites in solids, which combines a conventional high-field spin-echo NMR method with the resolution enhancement of the 'quadrupole shift' approach4,7. We demonstrate its application to the complete resol-ution of both the (1/2, 3/2) and (3/2, 5/2) transitions of the 27Al nuclei in a mixture of potassium and ammonium alums (KAl(SO4)2·12H2O and NH 4Al(SO4)2·12H2O).
UR - http://www.scopus.com/inward/record.url?scp=0022171547&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0022171547&partnerID=8YFLogxK
U2 - 10.1038/318163a0
DO - 10.1038/318163a0
M3 - Article
AN - SCOPUS:0022171547
SN - 0028-0836
VL - 318
SP - 163
EP - 165
JO - Nature
JF - Nature
IS - 6042
ER -