ABSTRACT Metallo-helicates are a commonly encountered assembly within supramolecular chemistry. Interest in these architectures stems from their inherent helical chirality which positions them for a diverse range of applications such as catalysis and non-linear optics (NLO). The current study uses Co(II) dinuclear double helicates as versatile supramolecular synthons. The ditopic ligand, L, features two tridentate quinolinyl-hydrazone binding sites imparting it with hydrogen bond donors and π-faces for secondary supramolecular interactions. Incorporation of L into [Co2(L)2]4+ helical assemblies results in a helical cationic supramolecular synthon with moieties predisposed to forming π-π stacking and hydrogen bond interactions. The single-crystal X-ray structures of [Co2(L)2]X4 (X = ClO4 −, BF4 − and CF3SO3 −) revealed a variety of anion dependent hydrogen bond networks arising through the interaction of the hydrazide hydrogen with the anion. These interactions in turn strongly influence the nature of the π-π stacking interactions of the quinoline moieties which can be analysed via the Hirshfield surface. Graphical Abstract

中文翻译：

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固态双核螺旋家族中的超分子相互作用

摘要 金属螺旋是超分子化学中常见的组装。对这些结构的兴趣源于它们固有的螺旋手性，这使它们适用于各种应用，例如催化和非线性光学 (NLO)。目前的研究使用 Co(II) 双核双螺旋作为多功能超分子合成子。双位配体 L 具有两个三齿喹啉基 - 腙结合位点，赋予其氢键供体和 π 面，用于次级超分子相互作用。L 与 [Co2(L)2]4+ 螺旋组装体的结合导致螺旋阳离子超分子合成子具有易于形成 π-π 堆积和氢键相互作用的部分。[Co2(L)2]X4 (X = ClO4 -, BF4 - 和 CF3SO3 -) 揭示了通过酰肼氢与阴离子的相互作用产生的各种阴离子依赖性氢键网络。这些相互作用反过来强烈影响喹啉部分的 π-π 堆积相互作用的性质，可以通过 Hirshfield 表面进行分析。图形概要