Sodium-23 MAS NMR study on nuclear quadrupole interaction in Na1-xAgxNO2

Ag-impurity effects on the first- and second-order quadrupole interaction ( QI) at Na-23 site in an isomorphic mixed system, Na1-xAgxNO2 (x = 0, 0.0084 , 0.026, 0.079, 0.094, 0.16), have been investigated by employing Na-23 (I = 3/2) magic angle spinning nuclear magnetic resonance (MAS NMR) technique. The central transition (CT) and satellite transition (ST) are simultaneous ly observed with this system. From the spectral analysis, the quadrupole pa rameter and its distribution width are obtained as a function of Ag concent ration. From the intensity loss of CT MAS centerband and of the envelope fu nction of ST MAS sidebands due to impurities, the range of their influence on the second- and first-order QI is estimated. The estimated ranges contai n the second and first neighbouring Na sites from the resonating 23Na nucle us for the first- and second-order QI, respectively. (C) 1999 Elsevier Scie nce B.V. All rights reserved.