A Zn-Polyrotaxane One-Dimensional Coordination Polymer as a Multi-responsive Luminescence Sensor and Photocatalyst for Dye Degradation

Abstract

A Zn(II)-based polyrotaxane 1D coordination polymer, {[Zn(Or)(Bimb)(H₂O)]₂·2H₂O}_n, 1 (Or = orotate; Bimb = 1,4-bis[(1H-imidazol-1-yl)methyl]benzene), has been synthesized. 1 provides for luminescent sensing of acetone, Fe³⁺, MnO₄^–, nitrofurantoin (NFT), uric acid (UA), and sucrose. The coordination polymer displays exceptional intensity quenching of ∼96.1% with 200 mg/dl of sucrose in aqueous solution. In addition, the reactivity of 1 to photocatalytically degrade the organic dye methylene blue (MB), a hazardous organic pigment, was established. 1 was able to degrade the dye due to the generation of reactive oxygen species.

Keywords:

• Polyrotaxane coordination polymer
• sensing properties
• photocatalytic degradation

Acknowledgements

Somnath, one of the authors, would like to express his sincere gratitude to the National Institute of Technology Raipur for awarding him an institutional research fellowship. The research resources offered by the Department of Chemistry are also appreciated by the authors. Dr. Kafeel Ahmad Siddiqui would like to thank the Director of the National Institute of Technology in Raipur, India, for his assistance with the “Crystal Engineering” project.

Disclosure statement

No potential conflict of interest was reported by the authors.