%0 journal article %@ 1744-683X %A Oral, I., Abetz, V. %D 2022 %J Soft Matter %N 5 %P 934-937 %R doi:10.1039/d1sm01815a %T Improved alkali metal ion capturing utilizing crown ether-based diblock copolymers in a sandwich-type complexation %U https://doi.org/10.1039/d1sm01815a 5 %X The compexation behavior of metals with free crown ethers (CE) and diblock copolymer-based CE is investigated. The latter shows at least 10 000 times stronger complexation than free CEs. On this basis, a highly stable CE complex within the polymer for efficient extraction of metal ions from low concentrations, e.g. lithium in seawater, is presented.