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A Supramolecular Polymer Network of Graphene Quantum Dots
Yuichiro Uemura1, Kairi Yamato1, Ryo Sekiya1
1Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8526, Japan.
Angewandte Chemie (International Ed. in English)
|March 7, 2018
Summary
Graphene quantum dots functionalized with ureido-pyrimidinone groups form supramolecular polymers and organogels. This demonstrates graphene quantum dots
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Nanotechnology
Background:
- Graphene quantum dots (GQDs) are promising nanomaterials with unique optical and electronic properties.
- Functionalization of GQDs can lead to novel materials with tailored properties.
- Supramolecular chemistry enables the construction of complex architectures through non-covalent interactions.
Purpose of the Study:
- To synthesize graphene quantum dot-organic hybrid compounds with specific functional groups.
- To investigate the formation of supramolecular assemblies and organogels using these hybrid compounds.
- To explore the potential of GQDs as platforms for supramolecular polymers and organogelators.
Main Methods:
- Synthesis of graphene quantum dot-organic hybrid compounds (GQD-2b-e) by introducing benzyl groups (C16) and ureido-pyrimidinone (UPy) moieties.
- Characterization of supramolecular assemblies using Gel Permeation Chromatography (GPC), Diffusion Ordered Spectroscopy (DOSY), and viscosity measurements.
- Atomic Force Microscopy (AFM) to visualize the structural organization of the hybrid compounds.
Main Results:
- GQD-2b-e compounds formed supramolecular assemblies via hydrogen bonding between UPy units.
- Higher UPy loading on GQDs resulted in larger supramolecular assemblies, confirmed by GPC, DOSY, and viscosity.
- AFM revealed polymeric network structures for GQD-2e, while GQD-2c and GQD-2d formed organogels tunable by alkyl chain modification.
Conclusions:
- Graphene quantum dots can serve as a versatile platform for creating supramolecular polymers.
- Chemical functionalization of GQDs enables the development of effective organogelators.
- The study highlights the potential of GQD-organic hybrids in advanced materials design.
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