title: Efficient synthesis of copillar[5]arenes and their host-guest properties with dibromoalkanes.
abstract: An efficient method for the synthesis of copillar[5]arenes was developed with FeCl(3) as catalyst and different 1,4-dialkoxybenzenes and paraformaldehyde as reactants (yields: 50-85%). The host-guest property of (co)pillar[5]arenes and terminal dibromoalkanes was investigated by (1)H NMR measurements and an X-ray study. The complexation behavior of the copillar[5]arenes can be tuned by changing the substituents on the host. A complete complexation selectivity was found between pillar[5]- and pillar[6]arenes, which is an interesting aspect for sensor techniques.
authors.affiliation: School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
authors.forename: Luzhi
authors.initials: L
authors.lastname: Liu
authors.forename: Derong
authors.initials: D
authors.lastname: Cao
authors.forename: Yi
authors.initials: Y
authors.lastname: Jin
authors.forename: Hongqi
authors.initials: H
authors.lastname: Tao
authors.forename: Yuhui
authors.initials: Y
authors.lastname: Kou
authors.forename: Herbert
authors.initials: H
authors.lastname: Meier