| Reference complex | Peak shift (ppm) | Description |
| Al phenoxide Al-catechin complex Al(H2O)3(C6H5O)3 (TTA) | 20.9 16.2
14.2 | Al(C6H5O)3. Al bonded to polyphenol molecule(s). Al3+ hexa-coordinated with oxygen from phenoxide anions and water ligands. |
| Al(H2O)3(OH)(C6H5O)2 (THDA) | 3.8 | Al3+ hexa-coordinated to the phenoxide, hydroxo and water oxygens. |
| Al(OH)3(H2O)3 | -1.4
| Al complex with symmetrically arranged OH and water ligands. (Basic complex found in xylite.) |