BoraneÈammonia complexes, trialcynylborazine and N-trimethylcycloborazane were characterized by 15N and 11B solid-state magic angle spinning (MAS) NMR. They are representative of compounds containing BÈN bonds and presenting various N and B environments, either tri-or tetracoordinated. InversionÈrec
✦ LIBER ✦
Sensitivity enhancement in 15N NMR spectroscopy of liquids using the J cross-polarization technique
✍ Scribed by R.D Bertrand; W.B Moniz; A.N Garroway; G.C Chingas
- Publisher
- Elsevier Science
- Year
- 1978
- Weight
- 174 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0022-2364
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41 MAS NMR spectroscopy with 'H cross-polarization is shown to be an efficient technique for distinguishing non-framework from framework Al in USY zeolites and has revealed the presence of non-framework tetrahedral Al. Field-dependent measurements and simulations show that the non-framework 30 ppm 2