Novel calixarenes fixed in the 1,3-alternate conformation and functionalized with thioamide groups have been synthesized and their selectivities for Pb2+ and Cd2+ ions in chemically modified field effect transistors (CHEMFETs) have been evaluated. The 25,27-bis(dimethylaminothiocarbonylmethoxy)-26,28-dipropoxycalixarene 3 in the 1,3-alternate conformation is more selective for Pb2+ than the analogous cone conformer. The 1,3-alternate calixarene 8 having, in the 25- and 27-positions, two pairs of vicinal thioamide moieties at the same face of the molecule, has the highest selectivities for Cd2+ reported so far.
|Journal||Journal of the Chemical Society. Perkin transactions II|
|Publication status||Published - 1997|