2002 Fiscal Year Final Research Report Summary
Electrochiroptics : Novel Molecular Response System
| Project/Area Number |
13440184
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
SUZUKI Takanori Hokkaido University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (70202132)
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| Co-Investigator(Kenkyū-buntansha) |
TSUJI Takashi Hokkaido University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (20029482)
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| Project Period (FY) |
2001 – 2002
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| Keywords | Molecular Response System / Molecular Device / Electrochromism / Redox System / Circular Dichroism / Chirality / Electron Donor / Functionalized Dye |
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| Research Abstract |
This research project is intended to construct the novel molecular response systems that transduce the electrochemical input into two kinds of spectral outputs, they are UV-Vis and CD spectra. These materials are named as "electrochiroptical response systems", and considered as promising candidates for use as chiral redox memories. Compared with the extensively studied electrochromic materials giving the UV-Vis spectral change as a sole output, there have been only a few successful examples reported so far. Based on our previous results on the multi-stage redox systems endowed with high electrochemical bistability, we have designed several chiral electron donors that can be reversibly transformed into the stable dicationic species. They exhibited drastic changes in UV-Vis as well as CD spectra during the interconversion. The high amplitude in CD signals is one of the central points to be considered in the molecular design, and we have realized it by exciton coupling of two identical chromophores located at the proper positions in these molecules. We are now planning to fix these molecules on the metal surface by making SAM, so that these molecules can be used as molecular devices.
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[Publications] T. Suzuki, R. Yamamoto, H. Higuchi, E. Hirota, M. Ohkita, T. Tsuji: "Electrochiroptical Response of a Hexaarylethane Derivative with a Helical pai-Skeleton : Drastic UV-Vis and CD Spectral Changes upon Electrolysis of 4', 5'-Dibromodispiro[xanthene-9, 9'(9'H, 10H')-phenanthrene-10', 9'" -xanthene]"J. Chem. Soc., Perkin Trans.. 2. 1937-1942 (2002)
Description
「研究成果報告書概要(欧文)」より
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[Publications] T. Suzuki, H. Higuchi, T. Tsuji, J. Nishida, Y. Yamashita, T. Miyashi, T. Nakamura, T. Matsumoto, H. Tada, K. Sugiura, Eds.: "Chemistry of Nanomolecular Systems : Towards the Realization of Molecular Device. Chapter 1 Dynamic Redox Systems : Towards the Realization of Unimolecular Memory"Springer. (2003)
Description
「研究成果報告書概要(欧文)」より
