1H, 31P NMR MAS, infrared and catalytic studies of heteropolyacid H3PW12O40 supported on MgF2
作者： V.M. Mastikhin , V.V. Terskikh , M.N. Timofeeva , O.P. Krivoruchko
DOI: 10.1016/1381-1169(94)00003-4
关键词: Catalysis 、 Crystallography 、 Solid-state nuclear magnetic resonance 、 Chemistry 、 Isobutylene 、 Nuclear magnetic resonance 、 Fluorine-19 NMR 、 Infrared spectroscopy 、 Heterogeneous catalysis 、 Proton NMR 、 Methanol
摘要: 1H and 31P NMR MAS spectra of heteropolyacid H3PW12O40 (HPA) supported on high dispersed MgF2 suggest the change structure HPA compared with crystal due to interaction support. at content below 3 wt% do not reveal line from protons attached HPA. In samples larger than δ ≈ 5 ppm was attributed in isolated heteropolyanions bonded support surface. At contents 20 crystals surface are formed; this follows appearance a = 9.3 typical for crystalline IR destruction low (less wt%) loading, its preservation contents. The 19F signals were found methanol after dissolving MgF2. Catalytic measurements show drastic increase activity HPAMgF2 catalysts reaction isobutylene oligomerization content.
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