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Double-Stranded Binuclear Helicates and Helicity Modulation

机译:双链双核螺旋分子和螺旋度调节

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All of the reported self-assembled complexes of cis-Pd2L'L-2(2) formulation, where L' stands for a chelating bidentate ligand and L for a nonchelating bidentate ligand, are "non-helical". We disclose here the debut of the long awaited "helicate" type architecture of the cis-Pd2L'L-2(2) formulation. In the present work, the term L' stands for tetramethylethylenediamine (tmeda) and L stands for a (1H-imidazolyl)methylappended bidentate nonchelating ligand having a rigid spacer. The torsion angle between the two coordination PdN4 planes of a given "helicate" is considered here as its magnitude of helicity. Length of spacer unit (i.e., 1,4-benzene, 4,4'-biphenyl and 4,4'-p-terphenyl) crafted in the backbone of L is found to impart such conformation to the bound ligand moieties that the magnitude of helicity is modulated.
机译:顺式-Pd2L'L-2(2)制剂的所有已报道的自组装复合物都是“非螺旋的”,其中L'代表螯合的双齿配体,L代表非螯合的双齿配体。我们在这里公开了期待已久的顺式Pd2L'L-2(2)制剂的“螺旋”型结构。在本工作中,术语L′代表四甲基乙二胺(tmeda),L代表具有刚性间隔基的(1H-咪唑基)甲基附加的双齿非螯合配体。给定“螺旋线”的两个配位PdN4平面之间的扭转角在此处视为其螺旋度。发现在L的主链中形成的间隔单元(即1,4-苯,4,4'-联苯和4,4'-对-三联苯)的长度赋予结合的配体部分这样的构象,使得螺旋度被调制。

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