Weak forces at work in dye-loaded zeolite materials: spectroscopic investigation on cation-sulfur interactions.
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.
Macchi
Giorgio
G
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
Botta
Chiara
C
Calzaferri
Gion
G
Catti
Michele
M
Cornil
Jérôme
J
Gierschner
Johannes
J
Meinardi
Francesco
F
Tubino
Riccardo
R
D002412:Cations / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D008856:Microscopy, Fluorescence; D011789:Quantum Theory; D013455:Sulfur / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
D002412:Cations; D004396:Coloring Agents; D017641:Zeolites; D013455:Sulfur