caa a22 4500 60617379X CHVBK 20210128100735.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11244-015-0388-7 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0388-7 Solid State NMR Characterization of Sn-Beta Zeolites that Catalyze Glucose Isomerization and Epimerization [Elektronische Daten] [Son-Jong Hwang, Rajamani Gounder, Yashodhan Bhawe, Marat Orazov, Ricardo Bermejo-Deval, Mark Davis] High resolution, multi-nuclear solid state nuclear magnetic resonance (NMR) characterizations are carried out in order to obtain insights into the structural features of Sn-beta zeolites that catalyze glucose isomerization or epimerization reactions in water and methanol solvents. In particular, we focus on investigating the local structural changes to catalytically-active framework Sn sites of different 119Sn-labeled beta zeolites, including the calcined, dehydrated, rehydrated, and post-sugar isomerization catalysis forms. Magic angle spinning (MAS) and cross polarization MAS (either from 1H or 19F) 119Sn NMR spectra provide evidence for changes to the local framework Sn coordination in the presence of water and sugar molecules, and provide insights into structural features of adsorbed intermediates that may be relevant in sugar isomerization reaction pathways. Springer Science+Business Media New York, 2015 Sn-beta nationallicence Isomerization nationallicence 119Sn NMR nationallicence Glucose nationallicence Fructose nationallicence Solid state NMR nationallicence Hwang Son-Jong Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Gounder Rajamani Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Bhawe Yashodhan Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Orazov Marat Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Bermejo-Deval Ricardo Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Davis Mark Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/7-9(2015-05-01), 435-440 1022-5528 58:7-9<435 2015 58 11244 https://doi.org/10.1007/s11244-015-0388-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0388-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hwang Son-Jong Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Gounder Rajamani Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Bhawe Yashodhan Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Orazov Marat Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Bermejo-Deval Ricardo Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Davis Mark Chemical Engineering, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/7-9(2015-05-01), 435-440 1022-5528 58:7-9<435 2015 58 11244