19680-35-4Relevant academic research and scientific papers
Modified BINOL podands: Synthesis of dinaphthosulfide podands and their application in spectrophotometric determination of toxic metals
Shockravi, Abbas,Chaloosi, Marzieh,Rostami, Esmael,Heidaryan, Davood,Shirzadmehr, Ali,Fattahi, Hanif,Khoshsafar, Hamid
, p. 2115 - 2123 (2008/02/08)
New dinaphthosulfide podands [3(a, b, and c)] were synthesized. The structures of these compounds were confirmed by IR, 1H NMR, 13C NMR, and Mass spectra. A simple, efficient, and sensitive procedure is described for the spectrophotometric determination of a trace amount of Ag+, Hg2+, Cr3+, Pb2+, and Ni2+ cations in the presence of Mn2+, Co2+, Cd2+ cations using the podand (3a). Formation constants of 1:1 complexes were determined from the absorbance-mole ratio data and found to vary in the order Pb2+ Ni2+ Hg2+ Cr3+ Ag+.
Novel synthesis of calix[n]arene amidoazobenzene derivatives
An, Lin,Cai, Ya Hua,Wang, Min-Hua,Yan, Chao Guo
, p. 75 - 77 (2007/10/03)
A series of calix[n]arenas and calix[4]resorciarenes containing azo chromophores on the lower rim were synthesised with two routes. The first direct route involved alkylating calixarenes with 4-chloroacetoaminoazobenzene. The second indirect route was by acylating 4-aminoazobenzene with calix[n]arylacetyl chloride. Their extracting abilities for transition metal ions were tested.
