T. Nabeshima et al., CONTROL OF HIGHLY SELECTIVE AG-ETHER( TRANSPORT BY REDOX REACTIONS BETWEEN THIOL AND DISULFIDE LOCATED INSIDE A CAVITY OF CROWN), Heterocycles, 41(4), 1995, pp. 655-659
A novel crown ether containing a thiol group inside the ring has been
prepared in good yield and exhibits Ag+ selectivity on transport of me
tal ions through a liquid membrane. However, the corresponding disulfi
de loses the affinity significantly.