The Application of Simple and Easy to Implement Decoupling Pulse Scheme Combinations to Effect Decoupling of Large 𝐽 Values with Reduced Artifacts

Figure 11

The ³¹P NMR spectrum of HP(=O)(OCH₂CH₃)₂ indicates the relative sensitivities of the resultant signal with decoupling of ¹H by (a) CPD decoupling using WALTZ and CW (PW, 60 μs; PL, 12.4 dB; 𝜈_1/2, 1.35 Hz; DB, 400 Hz; SDB, 150 Hz); (b) CPD decoupling using WALTZ (PW, 60 μs; PL, 10 dB; 𝜈_1/2, 1.33 Hz; DB, 10 kHz; SDB, 5 kHz); (c) CPD decoupling using WALTZ and CW (PW, 45 μs; PL, 11.4 dB; 𝜈_1/2, 1.37 Hz; DB, 2 kHz; SDB, 1 kHz); (d) CPD decoupling using WALTZ (PW, 45 μs; PL, 6 dB; 𝜈_1/2, 1.45 Hz; DB, 15 kHz; SDB, 3 kHz); (e) CPD decoupling using GARP and CW (PW, 60 μs; PL, 10.6 dB; 𝜈_1/2, 1.41 Hz; DB, 1 kHz; SDB, 400 Hz); (f) CPD decoupling using GARP (PW, 60 μs; PL, 9.4 dB; 𝜈_1/2, 1.35 Hz; DB, 19 kHz; SDB, 7 kHz); (g) CPD decoupling using GARP and CW (PW, 45 μs; PL, 10.9 dB; 𝜈_1/2, 1.55 Hz; DB, 700 Hz; SDB, irrelevant); and (h) CPD decoupling using GARP (PW, 45 μs; PL, 7.4 dB; 𝜈_1/2, 1.43 Hz; DB, 26 kHz; SDB, 9 kHz).