On the 13C CPMAS spectra of leucine

✍ Scribed by P.S. Belton; A.M. Gil; S.F. Tanner

• Book ID: 103963669
• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 354 KB
• Volume: 1
• Category: Article
• ISSN: 0926-2040
• DOI: 10.1016/0926-2040(92)90018-5

✦ Synopsis

The CP/MAS 13C NMR spectra of crystalline L-leucine and DL-leucine at 7 T are compared with previously reported spectra at lower field strengths. An increasing dominance of chemical shift effects over residual 14N-13C dipolar interactions is observed on the C alpha and C beta splittings with increasing field strength. A new structure is observed in the 25 ppm region of both samples. The spectra in this region were assigned by application of the depolarisation-repolarisation method. The assignment showed differences in the ordering of peaks between solid state and liquid state chemical shifts.