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Preferential solvation in carbonyl-twisted PRODAN derivatives
Yuliia Y Nikitina1, Emil S Iqbal, Hye Joo Yoon
1Department of Chemistry, College of William and Mary , Williamsburg, Virginia, 23185, United States.
The Journal of Physical Chemistry. A
|September 17, 2013
Summary
The Rosés and Bosch model reveals how PRODAN derivatives interact with binary solvents. Excited PRODAN derivatives form hydrogen bonds, influencing their fluorescence and quenching behavior in protic solvent mixtures.
Area of Science:
- Photochemistry
- Physical Chemistry
- Solvation Dynamics
Background:
- PRODAN derivatives are fluorescent probes sensitive to their microenvironment.
- Preferential solvation describes how solute molecules interact differently with mixed solvents.
- Hydrogen bonding plays a crucial role in molecular interactions and fluorescence properties.
Purpose of the Study:
- To analyze the fluorescence behavior of PRODAN derivatives in binary protic solvents.
- To apply the Rosés and Bosch model to understand preferential solvation effects.
- To characterize the hydrogen-bonding interactions of excited PRODAN derivatives.
Main Methods:
- Utilized the Rosés and Bosch model for preferential solvation analysis.
- Investigated fluorescence spectroscopy of PRODAN derivatives.
- Employed binary solvent mixtures with varying protic components.
Main Results:
- Preferential solvation indicates excited PRODAN derivatives form two hydrogen bonds.
- Singly H-bonded states exhibit red-shifted fluorescence with minimal quenching.
- Doubly H-bonded states show significant quenching with strong H-bond donors.
Conclusions:
- The Rosés and Bosch model effectively characterizes H-bonding in excited PRODAN derivatives.
- Solvent properties, like H-bond donating ability, dictate fluorescence quenching.
- Minimal preferential interaction observed in mixed protic solvents despite differing H-bonding capacities.
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