Project Details
Description
In halogen-bonding (XB), carbon-bound halogen atoms act as electron acceptors for
the lone-pair electrons of heteroatoms. The potential of these Lewis acid–base
interactions has seen much progress in recent years. Numerous interesting research
possibilities remain, given that supramolecular chemistry is complex and the
properties of the resulting assemblies are not yet fully understood. We propose to
fabricate halogen-bonding supramolecular thin film assemblies, investigate the details
of their electronic structure, morphology, and microstructure, determine whether/how
they can be utilized according to the nature of the XB molecular components and
substrate type, and finally implement them into various opto-electronic devices.
The proposed experimental study, targeting new halogen-bonded thin films, is
based on our initial results (van der Boom, Facchetti et al. J. Am. Chem. Soc. 2008,
130, 8162-8163; J. Am. Chem. Soc., 2010, 132, 12528-12530). The properties of this
intriguing class of interactive molecules and films will be investigated by combining
UV-vis and FT-IR spectroscopy, second-harmonic generation, ellipsometry, atomic
force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and aqueous
contact angle measurements. Our experimental study will be supported by M. Iron
(theory; Weizmann Institute), S.-T. Ho (optical device engineering, Northwestern
University), and Y. Xia (electronic device engineering, Polyera Corp.). The optical
and electronic properties of the XB thin films will also be studied and when they meet
the given specifications, these XB thin films will be implemented into organic thinfilm
semiconductor devices such as field-effect transistors, electrooptical modulators,
and solar cells. The proposed research covers diverse halogen-bonding chemistries
and is expected to promote a better fundamental understanding of their molecular
structure-property relationships. Moreover, it will lead to conceptually new functional
materials, and will enable the fabrication of new and optimized opto-electronic
devices.
Status | Finished |
---|---|
Effective start/end date | 9/1/13 → 8/31/18 |
Funding
- United States-Israel Binational Science Foundation (2012250)
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