title: macrocycle embrace: encapsulation of fluoroarenes by m-phenylene ethynylene host.
abstract: We report structural characterization of a new member of m-phenylene ethynylene ring family. This shape-persistent macrocycle also co-crystallizes with hexafluoro-, 1,2,4,5-tetrafluoro-, 1,3,5-trifluoro, and 1,4-difluorobenzene. The four complexes are almost isostructural, and all show the fluoroarene included into the central cavity of the macrocycle. Characterized by multiple short C - H⋅⋅⋅F - C contacts, these inclusion complexes further dimerize in the solid state into a 2+2 assembly, in which the two macrocycles embrace each other by their large hydrophobic groups that are rotated by 60° relative to one another.
authors.affiliation: Department of Chemistry, University of Houston, 112 Fleming Building, Houston, TX 77204-5003 (USA).
authors.forename: Ilya
authors.initials: I
authors.lastname: Popov
authors.forename: Teng-Hao
authors.initials: TH
authors.lastname: Chen
authors.forename: Sergey
authors.initials: S
authors.lastname: Belyakov
authors.forename: Olafs
authors.initials: O
authors.lastname: Daugulis
authors.forename: Steven E
authors.initials: SE
authors.lastname: Wheeler
authors.forename: Ognjen Š
authors.initials: OŠ
authors.lastname: Miljanić
keywords: X-ray diffraction; fluoroarenes; inclusion complexes; macrocycles; shape persistency