Abstract:
COORDINATION CHEMISTRY OF CALIXARENE Ⅲ.SYNTHESIS AND EXTRACTION STUDIES OF TETRA-METHOXY p-TERT-BUTYLCALIX4 ARENE TETRAKETONEZHU XHILIANG;XURONG;LU GUODI;XU YANZHENG;CHEN BINNI;CHEN YUDE(Department of Chemistry, Tongji University, Shanghai, 200092)ABSTRACT p-tert- butylcalix4 arene and its derivative tetramethoxy p-tert- butylcalix4 arenetetraketone(L)have been synthesized.The extraction of metal ions,including alkali metdl ions,akaline earth metal ions,and several transition metal ions such as Cu~(2+),Zn~(2+),Ni~(2+), Cd~(2+)andHg~(2+), is studied.It is found that the extractant L has the special extraction efficiency for Na~+.The extraction mechanism is also discussed in this paper,and the extraction equation can be writ-ten as:Na~++Pi~-+L=NaItPi_(o),where NaLPi represents the composition of the complex,The-extraction equilibrium constant for Na~+ has been determined to be lg K_(ex)=6. 59 at 30±1℃. Key words Calixarenes Coordination chemistrv Extraction