結合オリゴマーの電気伝導性は,単一分子レベルで測定される
Roman Huber1, Maria Teresa González, Songmei Wu
1Department of Physics, University of Basel, Klingelbergstrasse. 82, CH-4056 Basel, Switzerland.
Journal of the American Chemical Society
|January 1, 2008
まとめ
結合された分子の電気伝導性を測定し,オリゴ・フェニレン・ヴィニレン (OPV) がオリゴ・フェニレン・エチニレン (OPE) をわずかに上回っていることを発見しました. 溶解性側群は,分子アンカリングや伝導性に影響しませんでした.
科学分野:
- 分子電子は分子電子である.
- オーガニック・エレクトロニクス
- 単一分子測定による測定
背景:
- 結合された有機分子における電荷輸送の理解は,分子電子装置の開発において極めて重要です.
- 硫黄のアンカーグループは,単一分子結合で表面に分子を結合するために一般的に使用されます.
- 結合経路などの構造的変異は,電子特性に大きく影響する可能性があります.
研究 の 目的:
- 異なる構造を持つ4つの結合フェニレンオリゴマーの単分子電気伝導性を比較する.
- 端末硫黄アンカーグループが同一条件下での伝導性に与える影響を調査する.
- 溶解性側群が分子固定と伝導性に及ぼす影響を評価する.
主な方法:
- 単一分子断裂結合の製造. 一分子断裂結合の製造.
- 単一分子レベルで電気伝導性を測定する.
- 末端硫黄アンカーを持つ4つの結合フェニレンオリゴマーの合成と特徴付け.
主要な成果:
- オリゴ・フェニレン・ヴィニレン (OPV) とオリゴ・フェニレン・エチニレン (OPE) オリゴモアの電気伝導度を測定した.
- OPVはOPEと比較して電気伝導性がわずかに高かった.
- 溶解性側群は,交差点内の分子固定を妨げたり,伝導率値を大幅に変更したりしませんでした.
結論:
- この研究は,関連する結合系における導電性の直接的な単分子比較を提供します.
- オリゴ (((フェニレン・ヴィニレン)) は,オリゴ (((フェニレン・エチニレン)) よりも電気伝導性にわずかな優位性を示しています.
- 溶解性サイドグループの存在は,性能を損なうことなく,単一分子導電性測定と互換性があります.
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