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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Solid State Nucl Magn Reson. 2016 Mar 16;76-77:1–6. doi: 10.1016/j.ssnmr.2016.03.001

Figure 1.

Figure 1

Proton-detected 3D 15N/1H/1H CS/CSA/CS pulse sequence. 15N chemical shifts are expressed during t1 under the low-power 1H CW decoupling, while 1H CSAs are recoupled during t2. Simultaneous recoupling of 15N-1H hetronuclear interactions are avoided by the application of 180° pulse on the 15N channel in the middle of CSA recoupling pulses. The phase cycling scheme used in the 3D pulse sequence is as follows: ϕ1 = {4 (0), 4 (180)}, ϕ2 = {90}, ϕ3 = {0}, ϕ4 = {0}, ϕ5 = {90}, ϕ6 = {2 (0), 2 (180)}, ϕ7 = {90}, ϕ8 = {270}, ϕ9 = {{0, 180}, {90, 270}}, ϕ10= {90}, ϕ11 = {270}, ϕ12 = {0}, ϕ13 = {0}, ϕ14 = {0}, ϕacq = {0, 180, 180, 0, 180, 0, 0, 180}.