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Table 2 T 1 and T 2 relaxation time values for protons of IAA, 2-NAA, and 2,4-D

From: pH-controlled release of auxin plant hormones from cucurbit[7]uril macrocycle

1Ha T1(s) T2(s)
pH 1.0 pH 12.0 pH 1.0 pH 12.0
−CB[7] +CB[7] −CB[7] +CB[7] −CB[7] +CB[7] −CB[7] +CB[7]
IAA         
 a 5.184 5.067 5.342 4.727 3.157 0.384 2.559 2.500
 b 7.427 6.766 7.531 6.533 4.690 0.466 2.677 2.547
 c 4.512 4.337 6.236 5.765 1.372 0.496 2.535 2.240
 d 4.071 3.714 4.014 3.645 1.276 0.402 2.425 2.279
 e 9.158 8.244 8.911 7.945 1.986 0.350 3.025 3.025
 f 1.681 1.643 1.642 1.617 0.678 0.414 1.398 1.364
2-NAA         
 g 3.415 2.063 4.042 2.625 2.351 0.079 2.063 0.803
 h 3.114 2.758 4.172 2.405 1.410 0.098 2.483 1.257
 i 3.876 2.629 4.252 3.413 1.629 0.078 2.399 1.099
 l 4.531 3.075 3.879 3.119 2.108 0.103 2.420 1.852
 m 1.447 1.401 3.656 1.853 1.130 0.693 1.266 1.130
 n ND ND ND ND ND ND ND ND
2,4-D         
 o 8.030 3.557 6.659 5.832 4.521 0.447 1.290 1.319
 p 4.465 2.471 3.440 3.252 3.435 0.152 0.993 1.104
 q 3.294 1.642 2.031 2.514 3.122 0.104 1.120 0.981
 r ND ND ND ND ND ND ND ND
  1. aAuxin protons in IAA, 2-NAA and 2,4-D, in the absence and presence of CB[7], at pH 1.0 and 12.0. Letters indicate positions of protons on auxins structure as reported in Figure 2. ND, not determined.