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1H NMR spectral data (ppm) of BIA and its La(III) complex (b = broad; q = quartet; d = doublet; s = singlet).
| Proton | BIA | La(III) complex |
|
| ||
|---|---|---|
| −OH | 12.20 (s, br) | — |
| −NH | 3.5 (s, br) | 3.70 (s) |
| −CH2 | 2.5 (s) | 2.48 (s) |
| Aromatic protons | 7.45 (q, 2H) | 7.47 (d, 2H) |
| — | 7.10 (q, 2H) | 7.07 (d, 2H) |
