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(a) 2D 27Al TQ/MAS NMR spectrum of Al-alginate; (b) computational model of Al-alginate—the octahedral arrangement (yellow lines) of the ligands surrounding Al3+ (the black circle). Reprinted with permission from [216]. (Available online at: https://pubs.acs.org/doi/full/10.1021/acs.biomac.7b00627. Accessed on 14 November 2022. Further permission related to the material excerpted should be directed to the ACS).
