Abstract
         The satellite-transition MAS (STMAS) experiment offers an alternative approach to established methods such as dynamic angle spinning (DAS), double rotation (DOR) and multiple-quantum MAS (MQMAS) for obtaining high-resolution NMR spectra of half-integer quadrupolar nuclei. Unlike the multiple-quantum experiment, STMAS involves two-dimensional correlation of purely single-quantum coherences; satellite transitions in t₁ (or F₁) and the central transition in t₂ (or F₂). To date, STMAS has primarily been demonstrated for nuclei with spin quantum numbers I = 3/2 and, to a lesser extent, I = 5/2. However, many chemically relevant nuclei possess I > 3/2, such as ¹⁷O and ²⁷Al (both I = 5/2), ⁵⁹Co (I = 7/2) and ⁹³Nb (I = 9/2). Here, we discuss the application of STMAS to nuclei with spin quantum numbers from I = 3/2 to 9/2. First, we consider the practical implementation of the STMAS experiment using ⁸⁷Rb (I = 3/2) NMR as an example. We then extend the discussion to include nuclei with higher spin quantum numbers, demonstrating ²⁷Al, ⁴⁵Sc (I = 7/2), ⁵⁹Co and ⁹³Nb STMAS experiments on both crystalline and amorphous samples. We also consider the possibility of experiments involving satellite transitions other than m_I = ±1/2 to ±3/2 and, using ⁹³Nb NMR, demonstrate the correlation of all single-quantum satellite transitions up to and including m_I = ±7/2 to ±9/2. The absolute chemical shift scaling factors in these experiments are discussed, as are the implications for isotropic resolution.