... NEW LIPOPHILIC IONIZABLE CROWN ETHERS Bronislaw Czech, Sang Ihn Kang and Richard A. Bartsch* Department of Chemistry, Texas Tech University, Lubbock, Texas 79409 Summary: Two new ionizable crown ethers which bear lipophilic groups are synthesized and found to exhibit selectivity for complexation of K+ in ... RA Bartsch, GS Heo, SI Kang, Y. Liu, J. Strzelbicki. J. Org. ... Details of this synthesis are given in: B. Czech, DA Babb and RA Bartsch, Org. ...