The emission spectra of a series of naphthalene end-labeled oligo-oxyethylene(N-P_n-N) and their facilitated transport of cations across liquid membranes have beeninvestigated. Alkali-metal cations enhance or inhibit ...The emission spectra of a series of naphthalene end-labeled oligo-oxyethylene(N-P_n-N) and their facilitated transport of cations across liquid membranes have beeninvestigated. Alkali-metal cations enhance or inhibit the intramolecular excimer formation ofN-P_n-N remarkably, suggesting that the polyether chain of N-P_n-N in solution complexes with thecations, and the orientation of the terminal chromophores depends on the cation size and the lengthof the polyether chain. These compounds are able to act as carriers to facilitate transport ofalkali-metal cations through organic liquid membranes. The transport efficiencies are comparablewith those of cyclic carriers such as crown ethers, and show remarkable selectivity.展开更多
文摘The emission spectra of a series of naphthalene end-labeled oligo-oxyethylene(N-P_n-N) and their facilitated transport of cations across liquid membranes have beeninvestigated. Alkali-metal cations enhance or inhibit the intramolecular excimer formation ofN-P_n-N remarkably, suggesting that the polyether chain of N-P_n-N in solution complexes with thecations, and the orientation of the terminal chromophores depends on the cation size and the lengthof the polyether chain. These compounds are able to act as carriers to facilitate transport ofalkali-metal cations through organic liquid membranes. The transport efficiencies are comparablewith those of cyclic carriers such as crown ethers, and show remarkable selectivity.
