ABSTRACT The role of metal salts in inducing supramolecular gel network formation was analysed by reacting two pyridyl-N-oxide amides with various diamagnetic zinc(II) and cadmium(II) salts. Metal induced supramolecular gelation was observed for zinc(II) and cadmium(II) chloride complexes in water and the morphologies of the xerogels were analysed by scanning electron microscopy (SEM). The relative gel strength was corroborated with various non-bonding interactions observed in the solid-state structures of zinc(II) complexes using X-ray diffraction. The non-bonding interactions of the pyridyl-N-oxide amides and the metal complexes were compared to find the key interactions responsible for metallogel formation. The anion induced stimuli-responsive property of the metallogels was studied in the presence of halides and cyanide anions. The cadmium(II) gels were stable in presence of two equivalents of halides but the network collapsed in presence of cyanide anion in water and this property can be used to detect cyanide anions in water.

中文翻译：

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用于检测水中氰化物的金属络合诱导超分子凝胶

摘要 通过使两种吡啶基-N-氧化物酰胺与各种抗磁性锌 (II) 和镉 (II) 盐反应，分析了金属盐在诱导超分子凝胶网络形成中的作用。对于水中的氯化锌 (II) 和氯化镉 (II) 络合物，观察到金属诱导的超分子凝胶化，并通过扫描电子显微镜 (SEM) 分析干凝胶的形态。使用 X 射线衍射在锌 (II) 配合物的固态结构中观察到的各种非键合相互作用证实了相对凝胶强度。比较吡啶基-N-氧化物酰胺和金属配合物的非键合相互作用，以找出导致金属凝胶形成的关键相互作用。在卤化物和氰化物阴离子存在下研究了金属凝胶的阴离子诱导刺激响应特性。