Lanthanide crown ether complexes of p-sulfonatocalix[5]arene.
Two types of arrays are formed in water involving aza-crown ethers, p-sulfonatocalix[5]arene and europium(III) ions. One is a co-ordination polymer connecting calixarenes, sodium ions and lanthanide ions based on "ferris wheel" moieties incorporating aza-18-crown-6 and sodium ions. The second structure is a host-guest arrangement with di-protonated diaza-18-crown-6 in the cavity of the calixarenes as part of secondary coordination spheres of aquated europium(iii) ions.
Department of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.
Scott J
SJ
Dalgarno
Michaele J
MJ
Hardie
John E
JE
Warren
Colin L
CL
Raston