Xiong Shenglun, Chen Fangyuan, Zhao Tian, Li Aimin, Xu Guangyu, Sessler Jonathan L, He Qing
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China.
Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712-1224, United States.
Org Lett. 2020 Jun 5;22(11):4451-4455. doi: 10.1021/acs.orglett.0c01440. Epub 2020 May 14.
We report what to our knowledge is the smallest bis-calix[4]pyrrole (). It proved capable of trapping fluoride anions exclusively relative to other anions (Cl, Br, SCN, NO, HPO, HSO, SO, and HPO; tetrabutylammonium salts), as confirmed by H NMR spectroscopy (CDCl), X-ray diffraction analysis, DFT calculations, and molecular dynamics simulations. The F selectivity is ascribed to the small size of the cavity in .
