Premium
Transport of Ca 2+ Ion through a Bubbling Pseudo‐emulsion Liquid Membrane with Calixarenes and Calixcrowns as Carriers
Author(s) -
Wang Li,
Zheng QiYu,
Cao YanYan,
Liu Yu,
Jiang ZhongLiang,
Shi XianFa
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020200607
Subject(s) - chemistry , calixarene , ion , membrane , emulsion , phase (matter) , ion transporter , proton , inorganic chemistry , organic chemistry , molecule , biochemistry , physics , quantum mechanics
Several new calixcrowns were synthesized and characterized. The transport of Ca 2+ ion was investigated through a bubbling pseudo‐emulsion liquid membrane with these calixcrowns, the parent calix[ n ]arenes ( n = 4, 6, 8) and the ester, acid derivatives of calix[4]arene as mobile carriers. The effects of the initial concentrations of Ca 2+ ion in the source phase and the initial pH difference (ΔpH) between the receiving phase and the source phase were studied. The results suggest that there are two different transport mechanisms. The transports using calixarenes and their ester, acid derivatives as carriers represent a proton‐coupled co‐transport with a flow of protons in the opposite direction, while the transports using the calixcrowns as carriers exhibit the characteristics of an anion‐coupled co‐transport with a flow of anion in the same direction.