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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: J Magn Reson. 2012 Jun 7;222:74–80. doi: 10.1016/j.jmr.2012.05.019

Figure 2.

Figure 2

(a) 13C-1H R-CODEX spectra with different mixing times (black: 0.09 ms, blue: 1.36 ms, green: 2.73 ms, magenta: 4.55 ms, red: 27.27 ms). The peak near 139 ppm is the apical carbon in the imidazolium ring. The peak near 122 ppm is due to the two basal carbons. The two basal carbons’ peaks are merged and unresolved. (b) Peak intensity vs. mixing time for apical and basal carbons. The black lines are single exponential fits with an exchange rate kex of 0.32+/−0.03 kHz.