Synthesis and Metal Binding Properties of Anthraquinone Bridged with Coumarin

摘要: Molecular switching in macrocyclic polyether systems has been the subject of intense study during past 30 years. Especially, photochemical well-studied by Shinkai, Ueno, Takagi, Tabushi, and others. In addition, changes pH, light oxidation-reduction chemistry have all explored as mechanisms. The lariat ethers, podands having nitroaromatic sidearms similar species derived from anthraquinones concerned with electrochemical switching. Especially anthraquinone system is an interesting one for reducible switchable ethers because its anion stable months water so long oxygen excluded. Although (noncyclic polyethylene glycols) generally exhibit poor cation binding, when combined semiquinone nucleus, very strong complexation observed radical anion. can be used electrochemically switched transport bulk organic membranes both monoanion dianion formed detected. Both oneelectron two-electron reduction lead to enhanced binding anthraquinone-derived ethers. Anthraquinones differ significantly their ability undergo discrete or two electron also substituted surprising geometrical effects process. Gokel co-workers reported armed based on ring systems, which showed enhancement cyclic voltammetry. 1,8-Anthraquinone crown ether a total six donors macrocycling exceptionally binder not only reduced, but neutral form well. Anthraquinone plays important role various colorimetric sensor systems. coumarins are chromophores photophysical properties, convert into fluorescent probes alkali metal ions. Herein we synthesized new receptor 4 coumarin units, studied properties guests. Results Discussion