title: Synthesis and characterization of a hyper-branched water-soluble β-cyclodextrin polymer.
abstract: A new hyper-branched water-soluble polymer was synthesized by reacting β-cyclodextrin with pyromellitic dianhydride beyond the critical conditions that allow the phenomenon of gelation to occur. The molar ratio between the monomers is a crucial parameter that rules the gelation process. Nevertheless, the concentration of monomers in the solvent phase plays a key role as well. Hyper-branched β-cyclodextrin-based polymers were obtained performing the syntheses with excess of solvent and cross-linking agent, and the conditions for critical dilution were determined experimentally. A hyper-branched polymer with very high water solubility was obtained and fully characterized both as for its chemical structure and for its capability to encapsulate substances. Fluorescein was used as probe molecule to test the complexation properties of the new material.
authors.affiliation: Dipartimento di Chimica, Università di Torino, Via Pietro Giuria 7, 10125 Torino, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Trotta
authors.affiliation: Dipartimento di Chimica, Università di Torino, Via Pietro Giuria 7, 10125 Torino, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Caldera
authors.affiliation: Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via Pietro Giuria 9, 10125 Torino, Italy.
authors.forename: Roberta
authors.initials: R
authors.lastname: Cavalli
authors.affiliation: Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20132 Milano, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Mele
authors.affiliation: Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20132 Milano, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Punta
authors.affiliation: Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20132 Milano, Italy.
authors.forename: Lucio
authors.initials: L
authors.lastname: Melone
authors.affiliation: Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20132 Milano, Italy.
authors.forename: Franca
authors.initials: F
authors.lastname: Castiglione
authors.affiliation: Elettra - Sincrotrone Trieste. Strada Statale 14 km 163.5, Area Science Park, 34149 Trieste, Italy and Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Rossi
authors.affiliation: Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza L. da Vinci 32, 20132 Milano, Italy.
authors.forename: Monica
authors.initials: M
authors.lastname: Ferro
authors.affiliation: Dipartimento di Fisica e Scienza della Terra, Università di Messina, Viale F. Stagno d'Alcontres 31 Contrada Papardo, 98166 Messina, Italy.
authors.forename: Vincenza
authors.initials: V
authors.lastname: Crupi
authors.affiliation: Dipartimento di Fisica e Scienza della Terra, Università di Messina, Viale F. Stagno d'Alcontres 31 Contrada Papardo, 98166 Messina, Italy.
authors.forename: Domenico
authors.initials: D
authors.lastname: Majolino
authors.affiliation: Dipartimento di Fisica e Scienza della Terra, Università di Messina, Viale F. Stagno d'Alcontres 31 Contrada Papardo, 98166 Messina, Italy.
authors.forename: Valentina
authors.initials: V
authors.lastname: Venuti
authors.affiliation: Dipartimento di Chimica, Università di Torino, Via Pietro Giuria 7, 10125 Torino, Italy.
authors.forename: Dominique
authors.initials: D
authors.lastname: Scalarone
keywords: complexation; gelation; polyelectrolytes; soluble β-cyclodextrin polymers; β-cyclodextrin