Design and creation of organic monatomic layers
Research members： Dr. Hiroyuki Ozaki, Dr. Osamu Endo
Research fields： Basic chemistry
Departments： Institute of Engineering
Keywords： organic monatomic layer, conjugated polymer, hydrogen bond, electron spectroscopy, scanning tunneling microscopy
Web site：
Summary
Upon deposition onto an inert and clean solid surface under ultrahigh vacuum, a chainlike or planer organic compound forms a monomolecular layer, in which the molecules are laid flat and arranged regularly. We have introduced new covalent or hydrogen bonds among the lying molecules to construct extraordinarily thin (0.3 ~ 0.4 nm) networks mainly comprising carbon atoms (organic monatomic layers (MAL) including single sheet polymers) with well-defined geometric structures (configuration, conformation, orientation, arrangement, periodicity, etc.) and electronic structures. We aim to develop methodologies for the creation of such subnanomaterials as well as for the control of the microscopic structures and properties of the system. The following matters are under investigation.
1) Formation and isomerization of organic MAL observed by scanning tunneling microscopy
2) Conformation-dependent π electronic structures of polymeric MAL observed by metastable atom electron spectroscopy and ultraviolet photoelectron spectroscopy
3) First-principles calculations for the geometric and electronic structures of organic MAL
4) Combined structural analyses of hydrogen-bonded MAL
5) Preparation of various standard surfaces with an unusual orientation of chainlike or planar molecules
Reference articles and patents
1) “Ultraviolet Photoelectron Spectroscopy and Metastable Atom Electron Spectroscopy of a Sashlike Polydiacetylene (Atomic Sash) Monolayer: Observation of the π Electronic Structures Peculiar to Two Major Conformers”, S. Yamazaki et al., J. Phys. Chem. C, 117, 2121-2128 (2013).
2) “Changes in the Electronic Structures of a Single Sheet of Sashlike Polydiacetylene Atomic Sash upon Structural Transformations”, M. Suhara et al., J. Phys. Chem. C, 115, 9518-9525 (2011).
3) “Geometric and Electronic Structures of Hydrogen-Bonded Warren Truss Networks Comprising Planar Triamide Molecules on Graphite (0001)”, S. Yamazaki et al., J. Phys. Chem. C, 117, 9652-9662 (2013).
4) “Electron Spectroscopy of Ultrathin Cycloalkane Films on Graphite (0001): Molecular Orbitals, Conformation, and Orientation”, S. Yamazaki et al., Chem. Lett., 42, 1048-1050 (2013).
Contact
University Research Administration Center(URAC),
Tokyo University of Agriculture andTechnology
urac[at]ml.tuat.ac.jp
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