Synthesis and Mercurophilic Properties of Dithiocrown Ethers Having an Azulene Pendant
摘要:
Dithiocrown ether derivatives (3) having an azulene pendant were synthesized by regioselective reaction of 8,8-dicyanoheptafulvene derivatives with malononitrile in the presence of sodium ethoxide to examine their extraction and transport of Hg(II) ion through a liquid membrane. The transport was driven by acidic conditions and was capable of moving metal cations 'up-hill'. Thus, it was possible to follow the transport of Hg(II) ion from the aqueous source phase to the organic layer and from the organic layer to the receiving phase. The carrier (3) displayed remarkable selectivity for Hg(II) ion.