Organic micro/nanospheres assembled from a [2 + 2] Schiff base macrocycle for efficient adsorption of zinc ions and dyes
Year: 2024
Type: article
Abstract: A Schiff base macrocycle ( M ) containing both isophthalamide and bissalicylaldehyde scaffolds was successfully designed and synthesized. M exhibited typical aggregation-induced enhanced emission characteristics in a mixed solvent of DMF/water, and showed high selectivity for the recognition of Zn(II) over other metal ions. The binding process, binding ratio, and association constant of M with Zn(II) were estimated through UV–vis and fluorescence spectra titrations, isothermal titration calorimetry, and 1 H NMR titration experiments, and the detection limit towards Zn(II) was calculated as 1.03 × 10 −7 mol·L −1 . Interestingly, a large amount of micro/nanospheres of M with remarkable size uniformity were obtained from the reaction medium with sulfuric acid as a catalyst. On the basis of exploring the formation process of the micro/nanospheres and the key factors affecting their morphology and size, the Zn(II) and dye adsorption experiments were carried out. The results indicated that the micro/nanospheres of M can be applied to Zn(II) and dye adsorption with satisfactory removal rates.
Authors: Shan-Xian He, Chao Huang, Huan-Huan Yu, Bi-Xue Zhu
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,790
OpenAlex ID: W4404014605