Document Type : Research Paper
R & D Centre, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India. Department of Chemistry, Muthayammal College of Arts and Science, Namakkal District 637 408, Tamil Nadu, India
Department of Chemistry, Hindustan Institute of Technology and Science (Deemed-to-be University), Chennai 603103, Tamil Nadu, India
Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University), Coimbatore 641 114, Tamil Nadu, India
Science and Math Program, Asian University for Women, Chattogram 4000, Bangladesh.
Centre for Nanoscience and Genomics, Karunya Institute of Technology and Sciences (Deemed-to-be University), Coimbatore 641 114, Tamil Nadu, India
Nickel ions are toxic to the environment and they are also relevant in biology. Fluorescence sensing is a sensitive method and metal sensing can be carried out employing cheaper and easy-to-synthesize molecules that possess fluorescence emission. Therefore, development of newer and simply-synthesized chemosensor molecules for nickel ions in aqueous medium are required. We report, in this paper, a simple semicarbazone derivative of a piperidin-4-one as a nickel ion sensor in water. The compound forms a 1:1 stoichiometric complex with nickel ions. The association constant value is 4.04 × 104 mol-1 dm3. The nickel ion-selectivity of the compound is explored emploting UV-vis and fluorescence spectroscopy. Ni2+ ion-chelation enhances the fluorescence of the chemosensor molecule. The Ni2+ detection limit of the chemosensor was 1 × 10-7 mol dm-3. The compound also forms a 1:2 inclusion complex with β-cyclodextrin. The structure of the complex is proposed. Host : guest complex formation of β-cyclodextrin with the piperidin-4-one derivative results in the interference of the host molecule with the chelation of Ni2+ ions. As an extension of the application of the piperidin-4-one derivative, we demonstrate the Ni(II) ion filtration by incorporating the compound with a polysulfone film.