2004 Fiscal Year Final Research Report Summary
Development of nano-scale conjugated molecular wires and research of their functional abilities
| Project/Area Number |
13304051
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | HIROSHIMA UNIVERSITY |
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Principal Investigator |
OTSUBO Tetsuo Hiroshima University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (80029884)
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| Co-Investigator(Kenkyū-buntansha) |
ASO Yoshio Osaka University, The Institute of Scientific and Industrial Research, Professor, 産業科学研究所, 教授 (60151065)
TAKIMIYA Kazuo Hiroshima University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (40263735)
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| Project Period (FY) |
2001 – 2004
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| Keywords | Nano-scale molec / Molecular wire / Oligothiophene / Molecular electronics device / Self-assembled monolayer / Photovoltaic cell / Fullerene / Electroluminiscence device |
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| Research Abstract |
In order to explore the potential of nano-scale conjugated oligomers as advanced functional materials, the following four projects have been studied : 1,the designs and developments of functional conjugated nanomolecules ; 2,multifunctionalization of conjugated nanomolecules ; 3,higher-order organization of conjugated nanomolecules ; 4,applications of conjugated nanomolecules as molecular electronics materials. The most fruitful research result in the first topic is to have developed a series of oligothiophenes up to the 96-mer with 36.7 nm in length. The development of such extraordinarily long molecules means the docking of the bottom-up of synthetic molecules with the downsizing of microtechnology. This is the first important step towards the realization of single-molecular electronics. A great result in the second topic is to have revealed the advantage of oligothiophenes as superior molecular wires for photoinduced electron and energy transfer. A marked result in the third topics is to have developed a tripodal tetraphenylmethane anchor, which can serve the self-standing of the attached oligothiophene molecules in a self-assembled monolayer(SAM) formed on the gold substrate. It was actually applied to the successful construction of highly efficient SAM-based photovoltaic cells and electroluminescent devices. In the fourth topics, remarkable is to observe that oligothiophene/fullerene dyads are superior systems apt to photoinduced charge-separation, which is applicable to molecular electronics materials. Plastic solar cells using the oligothiophene/fullerene dyads were fabricated, demonstrating efficient photovoltaic performances.
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