title: Calix[4]arene based dipodal receptor nanohybrids for selective determination of chloride ions in aqueous media.
abstract: A chemical sensor based on p-tert butyl calix[4]arene has been synthesized and characterized using an assortment of spectroscopic techniques such as (1)H NMR, (13)C NMR, and elemental analysis. For sensor application, organic nanoparticles (N1) of 1 have been primed by implementing re-precipitation technique, which were further employed for preparing organic-inorganic hybrid (H1) by decorating N1 with gold nanoparticles. Both N1 and H1 were characterized using UV-visible, fluorescence, and DLS studies. Photo-physical changes due to anion binding with H1 were scrutinized using UV-visible absorption spectrometer and found it to promptly and selectively recognize Cl(-) ions in aqueous media. Thus, H1 can be effectively used for recognition of Cl(-) ions in aqueous media over a wide pH range, in samples of real time importance with a detection limit of 2.84×10(-9) M with a linear detection range up to 50 μM.
authors.affiliation: Centre for Nanoscience and Nanotechnology (UIEAST), Panjab University, Chandigarh 160014, India.
authors.forename: Harpreet
authors.initials: H
authors.lastname: Kaur
authors.affiliation: Department of Chemistry, Indian Institute of Technology Ropar (IIT Ropar), Rupnagar, Panjab 140001, India.
authors.forename: Jasminder
authors.initials: J
authors.lastname: Singh
authors.affiliation: Centre for Nanoscience and Nanotechnology (UIEAST), Panjab University, Chandigarh 160014, India.
authors.forename: Shweta
authors.initials: S
authors.lastname: Chopra
authors.affiliation: Centre for Nanoscience and Nanotechnology (UIEAST), Panjab University, Chandigarh 160014, India. Electronic address: navneetkaur@pu.ac.in.
authors.forename: Navneet
authors.initials: N
authors.lastname: Kaur
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D002712:Chlorides / Q000032:analysis*; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D002712:Chlorides; D010636:Phenols; D014874:Water Pollutants, Chemical; C121325:calix(4)arene; D014867:Water; D047250:Calixarenes; D006046:Gold
keywords: Calix[4]arene; Cl ion selectivity; Naked eye determination; Organic–inorganic nanohybrids; UV–visible spectroscopy