Synthesis and Structure of Silver(I) Coordination Polymers with Bis(pyridyl) Ligands Linked by an Aromatic Sulfonamide

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  • Katagiri Kosuke
    Kagawa School of Pharmaceutical Sciences, Tokushima Bunri University

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  • 芳香族スルホンアミドの立体特性を生かした配位高分子の創製
  • ホウコウゾク スルホンアミド ノ リッタイ トクセイ オ イカシタ ハイイ コウブンシ ノ ソウセイ

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Description

  Aromatic sulfonamides exist in a synclinal conformation with the twisted structure arising from rotation around the S-N bond in both the solid state and in solution. Simple bidentate ligands containing the sulfonamide moiety can be extended to form elongated ligands, and optically active components can be added to form a versatile building block for the construction of coordination polymers with many structures. Mixing the simple ligands 1 and 2 and the elongated ligands 3 and 4 with different Ag(I) salts yielded the corresponding complexes [Ag(1)OTf]n (1a), [Ag(2)]n•nOTf(2a), [Ag(3)OTf]n (3a), [Ag(3)]n•nBF4 (3b), [Ag(4)CH3CN]n•nBF4•nCHCl3 (4b), and [Ag(4)]n•nSbF6•nCH4O (4c). Straight chains and racemic helical polymers were observed in the crystal structure of complexes 1a and 2a, respectively. In the crystal structures of complexes 3a and 4b, infinite 1D straight chains containing a T-shaped coordination geometry about the Ag(I) centers were formed by the reaction of ligands 3 or 4 with Ag(I) salts in CH3CN/CHCl3. A continuous 1D coordination polymer containing a racemic mixture of left- and right-handed helices formed in the crystal structure of complex 3b. Furthermore, a layered coordination polymer consisting of a racemic mixture of left- and right-handed polymers was observed from the crystal structure of complex 4c. The construction of optically pure left- or right-handed 1D helical polymers via the introduction of chiral functional groups on the nitrogen atom of the sulfonamide ligand is currently under investigation in our laboratory.<br>

Journal

  • YAKUGAKU ZASSHI

    YAKUGAKU ZASSHI 134 (9), 939-947, 2014-09-01

    The Pharmaceutical Society of Japan

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