title: Unique binding behaviour of water-soluble polycationic oxacalix[4]arene tweezers towards the paraquat dication.
abstract: The first water-soluble polycationic oxacalix[4]arene molecular tweezers able to recognize - under pH control - the paraquat dication as a result of a delicate balance between electrostatic repulsion, Coulombic shielding and attractive π-stacking interactions are reported.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Messina, viale F. Stagno d'Alcontres 31, 98166 Messina, Italy. ggattuso@unime.it.
authors.forename: Nadia
authors.initials: N
authors.lastname: Manganaro
authors.forename: Gabriele
authors.initials: G
authors.lastname: Lando
authors.forename: Claudia
authors.initials: C
authors.lastname: Gargiulli
authors.forename: Ilenia
authors.initials: I
authors.lastname: Pisagatti
authors.forename: Anna
authors.initials: A
authors.lastname: Notti
authors.forename: Sebastiano
authors.initials: S
authors.lastname: Pappalardo
authors.forename: Melchiorre F
authors.initials: MF
authors.lastname: Parisi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Gattuso