Applications of in situ NMR in catalytic processes of organic reactions

In situ MAS NMR has been demonstrated to be a superior technique for analyz ing desorbed reactants, reacting adsorbates, intermediates and products. Th e results are useful for getting deeper insights into catalytic processes a nd reaction kinetics, and for revealing the mechanisms of organic reactions . The utility of in situ NMR spectroscopy has demonstrated that this techni que is an important means for the studies of catalytic organic reactions. T he objective of this paper is to give a review on the generation of apparat us for in situ MAS NMR experiments, and to illustrate the applications of t he in situ MAS NMR techniques in various important organic reactions cataly zed by solid catalysts. The typical reactions studied by in situ MAS NMR te chniques include conversion of methanol to hydrocarbons (MTG process), arom atization of methane, ethylbenzene reaction over zeolite HMOR. observation of carbenium intermediates formation, and photocatalytic organic reaction.