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Fluorescence properties of fluor molecules confined within nanoscale pores in a polymer matrix

Published online by Cambridge University Press:  10 June 2015

Valery N. Bliznyuk ,
Ayman F. Seliman ,
Scott M. Husson ,
George Chumanov  and
Timothy A. DeVol
Valery N. Bliznyuk*
Affiliation:
Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29634, USA
Ayman F. Seliman
Affiliation:
Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29634, USA
Scott M. Husson
Affiliation:
Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, USA
George Chumanov
Affiliation:
Department of Chemistry, Clemson University, Clemson, South Carolina 29634, USA
Timothy A. DeVol
Affiliation:
Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, South Carolina 29634, USA
*
Address all correspondence to Valery N. Bliznyuk at[email protected]
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Abstract

We demonstrate that fluorescence properties of organic fluors embedded in a porous polystyrene matrix are highly sensitive to the average pore size and pore-size distribution of the matrix. The effect can be understood as two different types of confinement imposed to the fluor molecules by the matrix. First, there is geometrical confinement that restricts the fluor oscillations due to its physical contact with a pore wall. Second, there is an electronic confinement due to a local polarization of the wall material by molecular dipoles. The effects lead to a spectral shift and enhancement of the fluorescence intensity of the material.

Type
Research Letters
Information
MRS Communications , Volume 5 , Issue 2 , June 2015 , pp. 347 - 352
Copyright
Copyright © Materials Research Society 2015 

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