PT Journal AU Winkler, T Bayrhuber, M Sahlmann, B Herges, R TI Tetrakis(diisopropyl amide) substituted norbornadiene and quadricyclane are highly barium selective ligands SO Dalton Transactions PY 2012 BP 7037 EP 7040 VL 41 IS 23 PU Royal Society of Chemistry DI 10.1039/c2dt30242j WP https://macau.uni-kiel.de/receive/publ_mods_00000024 LA en DE quadricyclane derivatives SN 1477-9226 AB Tetrakis(diisopropyl amide) substituted norbornadiene and quadricyclane derivatives were investigated for their extraction and transport capabilities with alkaline earth metal cations. Both amides exhibited a remarkably high preference of Ba2+ over any other alkali metal or alkaline earth cation. The binding geometries were determined by quantum chemical DFT calculations. PI London ER