Wolf, PatrickValla, MaxenceRossini, Aaron J.Comas-Vives, AleixNunez-Zarur, FranciscoMalaman, BernardLesage, AnneEmsley, LyndonCoperet, ChristopheHermans, Ive2015-01-082015-01-082015-01-08201410.1002/anie.201403905https://infoscience.epfl.ch/handle/20.500.14299/109932WOS:000342761700034Dynamic nuclear polarization surface enhanced NMR (DNP-SENS), Mossbauer spectroscopy, and computational chemistry were combined to obtain structural information on the active-site speciation in Sn-beta zeolite. This approach unambiguously shows the presence of framework Sn-IV-active sites in an octahedral environment, which probably correspond to so-called open and closed sites, respectively (namely, tin bound to three or four siloxy groups of the zeolite framework).active sitesDNP SENSMossbauer spectroscopysolid-state NMR spectroscopyzeolitestext::journal::journal article::research article