Lower-rim ferrocenyl substituted calixarenes: new electrochemical sensors for anions
- New ferrocene substituted calix[4 and 5]arenes have been prepared and the crystal structure of a lower-rim substituted bis ferrocene calixarene (7) has been elucidated. The respective ferrocene/ferrocenium redox-couples of compounds 6 (a calixarene tetra ferrocene amide) and 8 (a calixarene pentaferrocene amide) are shown to be significantly cathodically perturbed in the presence of anions by up to 160 mV in the presence of dihydrogen phosphate. © 1998 Elsevier Science Ltd. All rights reserved.
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