Scopus
YÖKSİS Eşleşti
Synthesis and study of allosteric effects on extraction behavior of novel calixarene-based dichromate anion receptors
Tetrahedron · Eylül 2002
YÖKSİS Kayıtları
Synthesis and study of allosteric effects on extraction behavior of novel calixarene based dichromate anion receptors
Tetrahedron · 2002 SCI-Expanded 77 atıf
PROFESÖR AYDAN YILMAZ →
Makale Bilgileri
DergiTetrahedron
Yayın TarihiEylül 2002
Cilt / Sayfa58 · 7735-7740
Scopus ID2-s2.0-0037119798
Özet
In this study the selective derivatization of p-tert-butylcalix[4]arene was carried out and two new calix[4]arene-based azacrown ionophores, 5,17-di-tert-butyl-11, 23-di-(methyl-3,5-dioxaoctane-1,8-diimine)-25,26,27,28-tetrahydroxycalix[4] arene (6), and 5,17-di-tert-butyl-11,23-di-(methyl-3,5-dioxaoctane-1,8-diimine)-25,27- diethoxyformyl-methoxy-26,28-dihydroxycalix[4]arene (7) have been synthesized. Treatment of 5,17-di-tert-butyl-11,23-diformylcalix[4]arene-25,26,27,28-tetrol (5) with 1,8-diamino-3,6-dioxaoctane gave the ionophore 6 which was converted to its diester derivative 7 by reaction with ethylbromoacetate in the presence of potassium carbonate. In the synthesis, the upper and lower rims of p-tert-butylcalix[4]arene were modified in order to acquire binding sites for the recognition of metal cations and dichromate anions. It was observed that receptor 7 is a better extractant for Cr2O72- anions than receptor 6. The protonated alkylinium form of 7 is an effective extractant for transferring the Cr2O72- anions from aqueous into a dichloromethane layer and failed in transferring Na+ cations due to the allosteric effect produced by the crown part of the calix moiety present at the p-position. © 2002 Elsevier Science Ltd. All rights reserved.
Yazarlar (3)
1
Aydan Yilmaz
2
Shahabuddin Memon
3
Mustafa Yilmaz
Anahtar Kelimeler
Dichromate anions
Extractant
Phase transfer
p-tert-butylcalix[4]arene
Schiff-base
Supramolecular chemistry
Kurumlar
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
87
Atıf
3
Yazar
6
Anahtar Kelime