A luminescent Cd(ii) coordination polymer as a multi-responsive fluorescent sensor for Zn²⁺, Fe³⁺ and Cr₂O₇ ^2- in water with fluorescence enhancement or quenching.

ABSTRACT: A luminescent Cd(ii) coordination polymer, namely {[Cd(btic)(phen)]·0.5H₂O} _n (CP-1) (H₂btic = 5-(2-benzothiazolyl)isophthalic acid, phen = 1,10-phenanthroline), was constructed through the mixed-ligand method under solvothermal conditions. CP-1 manifests a chain structure decorated with uncoordinated Lewis basic N and S donors. CP-1 exhibits high sensing towards Zn²⁺, Fe³⁺ and Cr₂O₇ ^2- ions with fluorescence enhancement or quenching. CP-1 exhibited a fluorescence enhancement for Zn²⁺ ions through weak binding to S and N atoms, and a fluorescence quenching for Fe³⁺ and Cr₂O₇ ^2- ions by an energy transfer process. The binding constants were ca

SUBMITTER: Liu L 

PROVIDER: S-EPMC8695774 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature