Showing papers by "Mustafa Yilmaz published in 2000"
TL;DR: In this article, ionophoric biscalix[4]arenyl nitriles in which the lower rims are linked via a single site on each calixarene were synthesized and their complexing abilities were studied by the liquid-liquid extraction of alkali (Li, Na+, K+, and Cs+) and selected transition metal (Cu2+, Co2+, Cd2+, Ni2+, and Hg2+) cations.
Abstract: Ionophoric biscalix[4]arenyl nitriles in which the lower rims are linked via a single site on each calixarene were synthesized. Their complexing abilities were studied by the liquid–liquid extraction of alkali (Li+, Na+, K+, and Cs+) and selected transition metal (Cu2+, Co2+, Cd2+, Ni2+, and Hg2+) cations. We found a novel selectivity of these compounds toward Hg+2 cations through examination of the extraction.
43 citations
TL;DR: The synthesis and complexing abilities of two biscalix[4]arenes with ligating ester and ketone groups in the cone conformation have been performed and determined by extraction and extraction constants measurements as discussed by the authors.
Abstract: The synthesis and complexing abilities of the two biscalix[4]arenes with ligating ester and ketone groups in the cone conformation have been performed and determined by extraction and extraction constants measurements. The cations studied were the alkali (Li+, Na+, K+, and Cs+) and transition (Ag+, Hg2+, Cu2+, Ni2+, Co2+, Cd2+) metals. It has been observed that ester derivative 7 shows a higher affinity toward transition metals than the alkali metal cations. By contrast, ketone derivative 8 extracts both alkali and transition metal cations effectively. Both of compounds 7 and 8 are better extractants than their monomeric analog 1.
29 citations
TL;DR: Two Schiff base derivatives of p-tert butylcalix[4]arene, one carrying two oxime groups, while the other having a 1,8-octylenediimino bridge, are synthesized in this article.
Abstract: Two different Schiff base derivatives of p-tert butylcalix[4]arene 3, 6 in which one of them carrying two oxime groups, while the other has a 1,8-octylenediimino bridge, are synthesized. Treatment of these monomers with triethylene ditosylate provided corresponding copolymers 5, 7. Their complexing properties with selected alkali and transition metals are reported here. It has been concluded that the binding ability of Schiff base-calix arene derivatives in transferring the metal cations is due to the presence of soft π-donor systems in the macrocyclic structure.
27 citations