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Fluorescence from aromatic compounds isolated in the solid state by double intercalation using layered polymer
Shinya Oshita1, Akikazu Matsumoto
1Department of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 24, 2006
Summary
Researchers developed a double-intercalation method for poly(muconic acid)s using alkylamine and pyrene guests. This technique controls solid-state fluorescence by isolating aromatic molecules within polymer layers, preventing excimer formation and enabling single-molecule emission.
Area of Science:
- Polymer Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Poly(muconic acid)s are stereoregular polymer crystals formed via topochemical polymerization.
- These polymers act as layered hosts for organic intercalation, with alkylamines reversibly inserted via acid-base interactions.
Purpose of the Study:
- To develop a novel double-intercalation method for controlling solid-state fluorescence properties.
- To investigate the intercalation of aromatic compounds, specifically pyrene, alongside alkylamines into poly(muconic acid) host materials.
Main Methods:
- Utilized a double-intercalation strategy employing alkylamine and pyrene as guest species.
- Introduced aromatic compounds into the hydrophobic layers of ammonium poly(muconic acid) crystals.
- Analyzed the fluorescence properties of intercalated aromatic molecules in the solid state.
Main Results:
- Successfully demonstrated the separate introduction of aromatic compounds into the polymer's hydrophobic layers.
- Observed that intercalated aromatic molecules, sandwiched between alkyl layers, exhibit single-molecule fluorescence emission.
- Confirmed the suppression of excimer formation for the guest aromatic molecules.
Conclusions:
- The double-intercalation method effectively controls solid-state fluorescence in poly(muconic acid)s.
- This approach allows for unique fluorescence properties by isolating photofunctional organic molecules.
- The method shows potential for application in various organic photofunctional materials.