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Molecular recognition of protonated cytosine ribbons by metal-oxalato frameworks

机译:金属-草酸酯骨架对质子化胞嘧啶带的分子识别

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摘要

A series of inorganic-organic hybrid materials, (1H,3H-cyt)(2)[M(ox)(2)(H2O)(2)] [M(II) = Mn (1), Co (2), Cu (3), Zn (4)] have been synthesized by the reaction of cytosine with water-soluble oxalato complexes at acidic pH. Crystallographic studies reveal that all compounds display a supramolecular three-dimensional lamellar structure knitted by wide layers of metal-oxalato complexes and planar hydrogen-bonded one-dimensional (1D) ribbonlike aggregates of protonated cytosine. The crystal building resembles that previously reported (Garcia-Teran, J. P., et al. Inorg. Chem. 2007, 46, 3596) for the analogous 1H,9H-adeninium compound, and it is driven, in addition to electrostatic forces, by a complex network of hydrogen bonds. Nevertheless, the smaller size of the nucleobase and its different self-assembling ID pattern lead to dissimilar molecular recognition interactions between the organic and the inorganic frameworks, which are discussed in detail.
机译:一系列无机-有机杂化材料,(1H,3H-cyt)(2)[M(ox)(2)(H2O)(2)] [M(II)= Mn(1),Co(2), Cu(3),Zn(4)]是通过胞嘧啶与水溶性草酸络合物在酸性pH下反应合成的。晶体学研究表明,所有化合物均显示超分子三维层状结构,该结构由金属-草酸络合物的宽层和质子化胞嘧啶的平面氢键合一维(1D)带状聚集体编织而成。晶体结构类似于先前报道的类似1H,9H-ade烯化合物的结构(Garcia-Teran,JP等,Inorg.Chem.2007,46,3596),除了静电作用外,它还由氢键的复杂网络。然而,核碱基的较小尺寸及其不同的自组装ID模式导致有机和无机骨架之间的分子识别相互作用不同,对此将进行详细讨论。

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