Solubility, acid-base and complexation properties of calix[4]resorcinarene in aqueous solutions of nonionic surfactants

被引：0
|
作者：
Mustafina, A.R. [1 ]
Amirov, R.R. [1 ]
Elistratova, Yu.G. [1 ]
Skripacheva, V.V. [1 ]
Nugaeva, Z.T. [1 ]
Kazakova, E.Kh. [1 ]
机构：
[1] Inst. of Organic and Physical Chem., Kazan Research Cent., RAS, ul. Arbuzova 8, Kazan', 420008, Russia
来源：
Kolloidnyj Zhurnal | 2002年 / 64卷 / 06期
关键词：
Complexation - Dissociation - pH - Solubility - Solutions - Surface active agents - Titration;
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摘要：
Solubility and acid-base properties of calix[4]resorcinarene (H8L) in aqueous solutions of Triton X-100, Triton X-405, and Brij-35 nonionic surfactants, as well as isopropanol were studied by pH-potentiometry. The dependence of the amount of a nonionic surfactant necessary to dissolve H8L on the length of ethylene oxide chain was found. The dissociation constants of macrocycle for the first four steps are low sensitive to the medium nature (micellar or water-alcohol solutions). Complexation ability of the [H8-nL]n- anions with respect to tetramethyl- and tetraethylammonium, N-methylpyridinium, and [Co(En)2(C2O4) ]+ cations was studied by pH-potentiometry. A noticeable increase in the selectivity of guest-host binding was found on going from aqueous or water-alcohol to micellar solutions.
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页码：811 / 816
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