Alkyltin Keggin Clusters Templated by Sodium
Alkyltin Keggin Clusters Templated by Sodium
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DOI：
10.1002/anie.201701703
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发表时间：
2017-08-14
影响因子：
16.6
通讯作者：
Nyman, May
中科院分区：
文献类型：
--
作者：
Saha, Sumit;Park, Deok-Hie;Nyman, May
十二聚体（Sn-12）和六聚体拓扑结构占主导地位的单烷基锡氧簇化学。它们的冷凝，由辐射曝光触发，最近在EUV光刻中产生了前所未有的图案化性能。从工业nBuSnOOH中结晶出一种新的簇拓扑结构，另外的表征技术表明存在其他簇。单晶X射线分析揭示了一个β-Keggin簇，这是已知的，但比其他Keggin异构体在聚氧乙烯酸盐和聚氧乙烯酸盐化学中更不常见。其结构式为[NaO 4（BuSn）（12）（OH）（3）（O）（9）（OCH 3）（12）（Sn（H2O）（2））]（beta-NaSn 13）。SAXS，NMR和ESI MS区分β-NaSn 13，Sn-12和其他簇存在于粗“n-BuSnOOH”，并强调钠作为烷基锡Keggin簇的模板的作用。与其他阳离子的烷基锡簇不同，β-NaSn 13是中性的。因此，它代表了一个独特的模型系统，没有抗衡离子，研究团簇的薄膜和纳米粒子的转变。
Dodecameric (Sn-12) and hexameric topologies dominate monoalkyltin-oxo cluster chemistry. Their condensation, triggered by radiation exposure, recently produced unprecedented patterning performance in EUV lithography. A new cluster topology was crystallized from industrial nBuSnOOH, and additional characterization techniques indicate other clusters are present. Single-crystal X-ray analysis reveals a beta-Keggin cluster, which is known but less common than other Keggin isomers in polyoxometalate and polyoxocation chemistry. The structure is formulated [NaO4(BuSn)(12)(OH)(3)(O)(9)(OCH3)(12)(Sn(H2O)(2))] (beta-NaSn13). SAXS, NMR, and ESI MS differentiate beta-NaSn13, Sn-12, and other clusters present in crude "n-BuSnOOH" and highlight the role of Na as a template for alkyltin Keggin clusters. Unlike other alkyltin clusters that are cationic, beta-NaSn13 is neutral. Consequently, it stands as a unique model system, absent of counterions, to study the transformation of clusters to films and nanopatterns.