Fluorescent Hydroxyflavone-Zeolite Nanoparticles: Ship-in-a-Bottle Synthesis and Photophysical Properties

3‐Hydroxyflavone (3‐OHF) was incorporated in zeolite micropores by ship‐in‐a‐bottle synthesis. This strategy consists of constructing the molecule by reaction of small precursors within the cavity. 3‐OHF molecules exhibit excited‐state intramolecular proton transfer (ESIPT) and a tautomeric equilibr...

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Bibliographic Details
Published in:Chemphyschem 2006-03, Vol.7 (3), p.583-589
Main Authors: Doussineau, Tristan, Smaïhi, Monique, Balme, Sébastien, Janot, Jean-Marc
Format: Article
Language:English
Subjects:
Chemical Sciences
Chemistry
chromophores
Colloidal state and disperse state
colloids
Exact sciences and technology
fluorescence
General and physical chemistry
host-guest systems
Ion-exchange
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Porous materials
Surface physical chemistry
zeolites
Zeolites: preparations and properties
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Summary:3‐Hydroxyflavone (3‐OHF) was incorporated in zeolite micropores by ship‐in‐a‐bottle synthesis. This strategy consists of constructing the molecule by reaction of small precursors within the cavity. 3‐OHF molecules exhibit excited‐state intramolecular proton transfer (ESIPT) and a tautomeric equilibrium between the 3‐OHF‐excited structures N* and T*exists. This equilibrium is strongly affected by the protic nature and polarity of the surrounding medium. The textural and spectroscopic characterization of the dye‐loaded zeolite colloids enabled the study of the correlation between the optical properties of the dye and the zeolite micropore environment. Photochemically stable fluorescent colloids were obtained by using microporous zeolite nanoparticles as hosts for ship‐in‐a‐bottle synthesis and confinement of 3‐hydroxyflavone (3‐OHF). N2 adsorption isotherms demonstrated the presence of 3‐OHF in the microporous cavities and time‐resolved fluorescence spectroscopy confirmed the stabilization of the normal N* form of excited hydroxyflavone in the zeolite cavities.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.200500363