title: Weak forces at work in dye-loaded zeolite materials: spectroscopic investigation on cation-sulfur interactions.
abstract: The interaction between sulfur-containing chromophores and cationic species (K(+)) has been investigated in dye-loaded zeolite materials by means of photoluminescence spectroscopy. A red-shift in the emission spectra of the host-guest compounds (HGCs) has been detected and unambiguously connected to the close proximity between a conjugated moiety and nearby free charges, suggesting a specific role played by sulfur lone pair electrons. Quantum-chemical calculations on model compounds have been performed to support this hypothesis.
authors.affiliation: Università degli Studi di Milano Bicocca and INFM, Dipartimento di Scienza dei Materiali, via R.Cozzi 53, I-20125 Milano, Italy. giorgio.macchi@mater.unimib.it
authors.forename: Giorgio
authors.initials: G
authors.lastname: Macchi
authors.forename: Chiara
authors.initials: C
authors.lastname: Botta
authors.forename: Gion
authors.initials: G
authors.lastname: Calzaferri
authors.forename: Michele
authors.initials: M
authors.lastname: Catti
authors.forename: Jérôme
authors.initials: J
authors.lastname: Cornil
authors.forename: Johannes
authors.initials: J
authors.lastname: Gierschner
authors.forename: Francesco
authors.initials: F
authors.lastname: Meinardi
authors.forename: Riccardo
authors.initials: R
authors.lastname: Tubino
mesh_terms: D002412:Cations / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D008856:Microscopy, Fluorescence; D011789:Quantum Theory; D013455:Sulfur / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D002412:Cations; D004396:Coloring Agents; D017641:Zeolites; D013455:Sulfur