Novel supramolecular β-cyclodextrin-piperidin-4-one complex assembled on gold nanoparticles. Selective detection of Cd2+ ions
| Autor: | Soundarapandian Suganthi, Poomalai Sumathi, Israel V.M.V. Enoch, Ramasamy Sivaraj, Govindaraj Tamil Selvan, Paulraj Mosae Selvakumar |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Cyclodextrin 010401 analytical chemistry Supramolecular chemistry 02 engineering and technology Fluorene 021001 nanoscience & nanotechnology 01 natural sciences Binding constant Combinatorial chemistry 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound chemistry Colloidal gold Monolayer Molecule 0210 nano-technology Selectivity Spectroscopy |
| Zdroj: | Microchemical Journal. 150:104066 |
| ISSN: | 0026-265X |
| Popis: | We report in this paper the Cd2+ ion sensing by a fluorene appended piperidin-4-one which is encapsulated by β-cyclodextrin-tethered gold nanoparticles. The thiolated cyclodexrin is synthesized and it forms a monolayer on gold nanoparticles through self-assembly. The structure of the thiolated cyclodextrin and the synthesized piperidin-4-one are characterized using spectroscopic techniques. 2-dimensional rotating frame Overhauser spectroscopy is employed to optimize the structure of the host-guest complex. The piperidin-4-one is encapsulated by the cyclodextrin molecule also when assembled on the gold nanoparticles. In the assembled monolayer form, the host-guest complex selectively binds Cd2+ ion in aqueous medium. The binding constant of 1: 2 complex is 5.61 (± 0.24) × 106 M−2. The Cd2+ ion sensing is facile also in the cyclodextrin complex self-assembled on gold nanoparticles. The selectivity and sensitivity of the complex are explained. Gold nanoparticle–cyclodextrin assembly act as a scaffold for the chemosensor molecule. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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