錯体分子認識による有機高次構造の自己集合 : 大環状化合物から [2] カテナンまで
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概要
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This paper discloses coordination approaches to well-defined organic structures including macrocycles, a three-dimensional cagelike compound, and [2] catenanes. These supramolecules self-assembled from (en) Pd(NO<SUB>3</SUB>)<SUB>2</SUB> (1, en = ethylenediamine) and appropriate polypyridyl-substituted ligands. Treatment of 1 with 4, 4′-bipyridine (2), for example, gave macrocyclic tetranuclear Pd(II) complex [(en) Pd(μ-2)]<SUB>4</SUB>(NO<SUB>3</SUB>)<SUB>8</SUB> quantitatively, while macrocyclic dinuclear Pd(II) complexes assembled from 1 and flexible ligands such as PyCH<SUB>2</SUB>CH<SUB>2</SUB>Py (Py =4-pyridyl). From tridentate ligand 1, 3, 5-(PyCH<SUB>2</SUB>)<SUB>3</SUB>C<SUB>6</SUB>H<SUB>3</SUB> and 1 in 2 : 3 ratio, on the other hand, a three-dimensional cagelike compound assembled in high yields only in the presence of certain types of guest molecules, providing an entire model for induced-fit. The coordination approach made it possible to interlock two apparently continuous molecular rings : i.e., a macrocycle assembling from 1 and 1, 4-(PyCH<SUB>2</SUB>)<SUB>2</SUB>C<SUB>6</SUB>H<SUB>4</SUB> was found to be in equilibrium with its catenated dimer, and polar medium strongly pushed the equilibrium toward the catenane up to >99 : 1 ratio.
- 社団法人 有機合成化学協会の論文
著者
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藤田 誠
千葉大学工学部
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藤田 誠
千葉大学工学部応用化学科
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小倉 克之
千葉大学工学部
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藤田 誠
千葉大・工
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Fujita Morifumi
Graduate School Of Science Himeji Institute Of Technology
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小倉 克之
千葉大学工学部応用化学科
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