title: Optical chemosensors based on transmetalation of salen-based Schiff base complexes.
abstract: We report our systematic studies of novel, simple, selective, and sensitive optical (both colorimetric and fluorescent) chemosensors for detecting Al(3+) based on transmetalation reactions (metal displacement or exchange reactions) of a series of K(I), Ca(II), Zn(II), Cu(II), and Pt(II) complexes containing different ligands of salen-based Schiff bases. Both the chemical structure of the salen ligand and the identity of the central metal ion have a tremendous impact on the sensing performance, which is mainly determined by the stability constant of the complex. Moreover, the selectivities of the salen-complex-based chemosensors are much better than those of the corresponding free salen ligands because of the shielding function of the filled-in metal ion in the complex. Therefore, the present work potentially provides a new and simple way to design optical probes via complex-based transmetalation reactions.
authors.affiliation: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors.forename: Jinghui
authors.initials: J
authors.lastname: Cheng
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Ma
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jiaoyan
authors.initials: J
authors.lastname: Liu
authors.forename: Xiangge
authors.initials: X
authors.lastname: Zhou
authors.forename: Haifeng
authors.initials: H
authors.lastname: Xiang
mesh_terms: D008024:Ligands; D008670:Metals / Q000737:chemistry*; D055095:Optics and Photonics; D012545:Schiff Bases / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D008024:Ligands; D008670:Metals; D012545:Schiff Bases