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Air-Stable Thin Films with High and Anisotropic Electrical Conductivities Composed of a Carbon-Centered Neutral ?-Radical.


ABSTRACT: Air-stable thin films (50-720 nm thickness) composed of a carbon-centered neutral ?-radical with high and anisotropic electrical conductivities were fabricated by vapor deposition of 4,8,12-trioxotriangulene (TOT). The thin films were air-stable over 15 months and were the aggregate of TOT microcrystals, in which a one-dimensional ?-stacking column was formed through the strong singly occupied molecular orbital (SOMO)-SOMO interaction with two-electron-multicenter bond among the spin-delocalized ?-planes. The orientations of the one-dimensional column of TOT were changed depending on the deposition rate and substrates, where face-on-oriented thin films were epitaxially grown on the graphite 0001 surface, and edge-on-oriented thin films were grown on glass, SiO2, and indium tin oxide substrates under a high-deposition rate condition. The films showed high electrical conductivities of 2.5 × 10-2 and 5.9 × 10-5 S cm-1 along and perpendicular to the ?-stacking column, respectively, for an edge-on oriented thin film.

SUBMITTER: Ito H 

PROVIDER: S-EPMC6812104 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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Air-Stable Thin Films with High and Anisotropic Electrical Conductivities Composed of a Carbon-Centered Neutral π-Radical.

Ito Hiroshi H   Murata Tsuyoshi T   Miyata Takahiro T   Morita Miwa M   Tsuji Ryotaro R   Morita Yasushi Y  

ACS omega 20191009 17


Air-stable thin films (50-720 nm thickness) composed of a carbon-centered neutral π-radical with high and anisotropic electrical conductivities were fabricated by vapor deposition of 4,8,12-trioxotriangulene (<b>TOT</b>). The thin films were air-stable over 15 months and were the aggregate of <b>TOT</b> microcrystals, in which a one-dimensional π-stacking column was formed through the strong singly occupied molecular orbital (SOMO)-SOMO interaction with two-electron-multicenter bond among the sp  ...[more]

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