Inorganic Chemistry, Vol.43, No.18, 5588-5597, 2004
Silver-109 NMR spectroscopy of inorganic solids
In this study the Ag-109 NMR spectra of the following solid inorganic silver-containing compounds were investigated: AgNO3, AgNO2, Ag2SO4, Ag2SO3, AgCO3, Ag3PO4, AgCl, AgBr, AgI, AgSO3CH3, silver p-toluenesulfonate, NaAg(CN)(2), KAg(CN)(2), K3Ag(CN)(4), Me4NAgCl2, silver diethylthiocarbamate, silver lactate, silver acetate, silver citrate, and bis[(N,N-1-di-tert-butylformamidinato)silver(I)]. The magic angle spinning (MAS) spectra of all compounds were obtained. In some cases, when protons were available, the H-1 to Ag-109 cross-polarization (CP) technique was used to enhance the signal and shorten the experimental relaxation delay. It was possible to obtain slow MAS (or CP/MAS) or nonspinning spectra for 10 samples, allowing the determination of the principal components of the Ag-109 chemical shift (CS) tensors. The isotropic chemical shifts and the CS tensors are discussed in light of the available crystal structures. The need for an accepted standard for referencing Ag-109 chemical shifts and the use of AgSO3CH3 as a CP setup sample are also discussed.