Macroscopic recognition of iodide by polymer appended calix[4]amidocrown resin
Year: 2019
Type: article
Abstract: Pragati R Sharma*a, Shubham Pandeya, Vineet K Sonia, Ganpat Choudharya & Rakesh K Sharmaaa Department of Chemistry, Indian Institute of Technology, Jodhpur, IndiaCONTACT Pragati R Sharma [email protected] Department of Chemistry, Indian Institute of Technology, NH-62, Karwad, Jodhpur 342037, IndiaABSTRACTThe current study reveals the synthesis of polymer appended Calix[4]amidocrown-5 with specific binding affinity for iodide at ppm-level. The low detection limits are observed via UV-vis and fluorescence spectroscopy. The time-dependent solution and solid-state 127I NMR studies with 18.8 and 19 ppm shifts, indicate a strong sensing nature of resin towards iodide ion. A significant reduction in surface area and pore volume with higher thermostability of resin after iodide uptake indicated iodide inclusion in the amidocrown cavity. The mechanism of iodide sensing may be governed by noncovalent interactions of NH and OH protons present in amidocrown and phenyl ring as observed in terms of emission enhancement in fluorescence spectroscopy. The binding affinity and stoichiometric determinations are determined by Benesi-Hildebrand and Jobs plots, respectively.Graphical abstract
Source: Supramolecular chemistry
Institution: Indian Institute of Technology Jodhpur
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2980098761