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Direct Observation of the Binding Mode of the Phosphonate Anchor to Nanosized Polyoxotitanate Clusters

机译:直接观察膦酸酯锚与纳米级聚氧钛酸酯簇的结合模式。

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摘要

The structures of three newly synthesized phosphonate-substituted polyoxotitanates are reported. The Ti/O core of [Ti_4O(OEt)_(12)(PhenylPO_3)] (1) is the building block for two larger phosphonate-substituted nanoclusters, [Ti_(25)O_(26)(OEt)_(36)(PhenylPO_3)_6] (2) and [Ti_(26)O_(26)(OEt)_(39)(PhenylPO_3)_6]Br (3). All compounds exhibit a not previously recognized triply bridging binding mode of the phosphonate anchor with short connecting Ti-O bonds, the average of which is 2.010(7) ?. Comparison with previously reported work suggests that the binding mode of the phosphonate anchor is strongly dependent on the structure of the underlying substrate.
机译:报道了三种新合成的膦酸酯取代的聚氧杂环丁烷酸酯的结构。 [Ti_4O(OEt)_(12)(苯基PO_3)](1)的Ti / O核心是两个较大的膦酸酯取代的纳米簇[Ti_(25)O_(26)(OEt)_(36)的构造单元(苯基PO_3)_6](2)和[Ti_(26)O_(26)(OEt)_(39)(苯基PO_3)_6] Br(3)。所有化合物均显示出具有短连接的Ti-O键的膦酸酯锚的前所未有的三重桥键结合模式,其平均值为2.010(7)Ω。与先前报道的工作进行比较表明,膦酸酯锚的结合模式强烈依赖于下层底物的结构。

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