Predominant hosting lead(II) in ternary mixtures of heavy metal ions by a novel of diethylaminomethyl-calix[4]resorcinarene

Abstract

Heavy metal ions from single and ternary systems of Pb(II), Cu(II), and Ni(II) adsorbed by calix [4]resorcinarenes in water-chloroform extraction were studied. Comparison was made of calix [4]resorcinarenes, 2,8,14, 20-tetraundecyl calix[4]resorcinarene-4,6,10,12,16,18,22,24-octol, and diethylaminomethyl-calix[4]resorcinarene, 5,11, 17,23-tetra(diethylaminomethyl)-2,8,14,20-tetraundecylcalix[4]resorcinarene-4,6,10,12,16,18,22,24-octol, for predominant extraction of their ions from the ternary mixture of aqueous solution at different pH in a water layer. The hosting of Pb(II) by the diethylaminomethyl-calix[4]resorcinarene occurred efficiently at pH 6-7. The hosting of Pb(II), Cu(II), and Ni(II) ions for the ternary aqueous mixture was applied to the Langmuir isotherm. Adsorption was studied using nuclear magnetic resonance spectroscopy in a water-deuterium chloroform extraction system. Results showed that as the heavy metal ions were included into the host cavity, the observation of shifted peaks of water molecules from downfield to higher field was visible in the nuclear magnetic resonance spectra, meaning that water molecules were included with heavy metal ion into the host cavity. The spectra also showed that the diethylamino group expressed formation of the coordination complex between the diethylaminomethylcalix[4]resorcinarene and Pb(II) for the purpose of predominant hosting of Pb(II).

Determination of lead ions in fish and oyster samples using a nano-adsorbent of functionalized magnetic graphene oxide nanosheets-humic acid and the flame atomic absorption technique

“…The aim of this study was to investigate the existence of lead in fish (white soles) and oyster muscle tissues in Bandar Abbas watershed. The measurement of lead ions, as a main factor of polluting and destroying the environment, has been paid more attention than that of other heavy metal contaminants such as silver, zinc, and manganese (Kakavandi et al, 2017;Yusof et al, 2014).…”

Bringing a Molecular Plus One: Synergistic Binding Creates Guest-Mediated Three-Component Complexes

“…Calixarenes, resorcinarenes, macrocyclic cavitands extensively studied for host-guest applications, [23][24][25][26] are well known for their ability to bind molecular guests via noncovalent interactions within their shallow and well-defined bowl-shaped cavity. 27 Two-component dimeric and hexameric capsules are common [28][29][30] but three-component all-organic structures involving macrocycles remain rare, and mostly involve either the host supported on a polymer or surface or polymer-like backbone, [31][32][33][34] or the host forming an inclusion complex with two guests simultaneously. [35][36][37][38][39] But research into these systems has overlooked a potentially useful topology.…”

Host–Guest Extraction of Heavy Metal Ions with p-t-Butylcalix[8]arene from Ammonia or Amine Solutions

“…As a result, the aromatic phenolic rings can form a cavity to integrate the guest metal ion. Recently, Yusof et al reported that the heavy metal ions could be included into the host calix[4]resorcinarenes cavity in water-chloroform extraction systems [ 4 , 5 ]. Calix[6]arenes can be also modified with a carboxylic acid as host in the host – guest extraction of immunoglobulin G (IgG) [ 6 ].…”