title: A polymerized calix[6]arene monolayer having gas permeation selectivity that exceeds Knudsen diffusion.
abstract: A polymerized monolayer of 5,11,17,23,29,35-hexamercaptomethyl-37,38,40,41,42-hexakis-(1-n hexadecyloxy)calix[6]arene (1) has been synthesized on the surface of an ca. 15 mum-thick film derived from poly[1-(trimethylsilyl)-1-propyne] (PTMSP). This monolayer exhibits a permeation selectivity toward He and SF6 that exceeds Knudsen diffusion. Analogous membranes made from a calix[6]arene that contains amidoxime headgroups (i.e., 2) showed Knudsen diffusion characteristics.
authors.affiliation: Departments of Chemistry and Chemical Engineering, Lehigh University, Bethlehem, Pennsylvania 18015.
authors.forename: Xun
authors.initials: X
authors.lastname: Yan
authors.forename: Vaclav
authors.initials: V
authors.lastname: Janout
authors.forename: James T
authors.initials: JT
authors.lastname: Hsu
authors.forename: Steven L
authors.initials: SL
authors.lastname: Regen