TABLE 1.

¹³C{¹⁹F} REDOR sideband dephasing* (ΔS/S_o) after 4 and 8 ms of dipolar evolution

	Sideband No.
Evolution time[ms]	+2	+1	0	−1	−2	σ
4	0.132	0.063	0.072	0.065	0.072
		(0.93)	(1.05)	(0.96)
Calculated		(0.92)	(1.06)	(1.02)		0.03
8	0.079	0.082	0.102	0.089	0.123
		(0.86)	(1.06)	(0.92)
Calculated		(0.94)	(1.08)	(0.98)		0.06

Values of ΔS/S_o scaled relative to the total dephasing are shown in parentheses for the centerband and first spinning sidebands. Calculated values together with root mean-square deviations (σ) for each dephasing time are shown in italics. Magic-angle spinning was at 2 kHz.

^*

Values in bold were used in determining orientation. The ratio of the sideband dephasing relative to the total dephasing for sideband N is defined as:

where k is the sideband order (k = −1, 0, +1) and ΔI_k = I_k,o − I_k, with I_k and I_k,o the sideband intensity in the presence and in the absence of dephasing pulses, respectively. The root mean-square deviation (σ) between calculated and experimental relative dephasings (defined above) is calculated using

where n = 3 is the number of sidebands included in the calculation for each dephasing time.