Photoresponsive Crown Ethers. Part 3. Photocontrol of Ion Extraction and Ion Transport by Several Photofunctional Bis(Crown Ethers)
Three photoresponsive bis(crown ethers) with an azo-linkage (2) - (4) were synthesised for the purpose of controlling ion extraction and ion transport by an on-off light switch.The compound trans-(2), in which azobenzene is linked with two monoaza-15-crow