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Device-Compatible Chiroptical Surfaces through Self-Assembly of Enantiopure Allenes
A Ozcelik, R Pereira-Cameselle, A von Weber1
1Department of Physical Chemistry, Catalysis Research Center , Technische Universität München , Lichtenbergstr. 4 , Garching 85748 , Germany.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 20, 2018
Summary
Researchers developed functional chiral allenes for gold surfaces, creating stable, upstanding nanostructures. These interfaces exhibit intense chiroptical second harmonic generation, paving the way for everyday chiroptical applications.
Area of Science:
- Materials Science
- Organic Chemistry
- Nanotechnology
Background:
- Chiroptical methods offer superior structural elucidation compared to achiral techniques.
- Developing functional materials with strong chiroptical responses is key for broader applications.
- Robust, tailored interfaces are needed for practical, everyday device integration.
Purpose of the Study:
- To design and synthesize novel chiral allenes.
- To functionalize gold surfaces with these chiral allenes.
- To create stable, device-compatible chiroptical interfaces.
Main Methods:
- Synthesis of chiral allenes.
- Self-assembly of chiral allenes onto gold surfaces.
- Characterization using ellipsometry, X-ray photoelectron spectroscopy (XPS), and near-edge X-ray absorption fine structure (NEXAFS).
Main Results:
- Formation of a monolayer-thin, room-temperature-stable, upstanding chiral architecture.
- Demonstration of intense chiroptical second harmonic generation (SHG) from the nanostructures.
- Successful anchoring of nanostructures to device-compatible substrates.
Conclusions:
- The synthesized chiral allenes effectively functionalize gold surfaces.
- The resulting interfaces exhibit significant chiroptical properties suitable for advanced applications.
- The straightforward preparation and robust nature of these interfaces offer major prospects for widespread adoption.
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