Bead-like structures and self-assembled monolayers from 2,6-dipyrazolylpyridines and their iron( ii ) complexes
Bead-like structures and self-assembled monolayers from 2,6-dipyrazolylpyridines and their iron( ii ) complexes
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2,6-二吡唑基吡啶及其铁( ii )配合物的珠状结构和自组装单层
DOI：
10.1039/c5tc01233c
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发表时间：
2015
影响因子：
6.4
通讯作者：
Pukenas L
中科院分区：
文献类型：
--
作者：
Pukenas L
将[Fe（bpp）2][BF 4]2（bpp = 2，6-二[吡唑-1-基]吡啶）的丙酮溶液滴铸到HOPG表面上提供了不寻常的珠链纳米结构。每条链中的珠粒大小相似，直径在2-6 nm范围内，高度高达10 nm，这与它们含有10-50个化合物分子一致。珠可以分为两种类型，表现出不同的导电制度，通过电流成像隧道光谱（CITS），这似乎与它们在链中的位置，并可能对应于含有高自旋和低自旋铁中心的分子。类似地，通过XPS，在金表面上的络合物的滴铸膜包含完整的[Fe（bpp）2][BF 4]2化合物。4-巯基-2，6-二[吡唑-1-基]吡啶在沉积于金上时经历大量分解，形成元素硫，但通过XPS和椭圆偏振法，4-（N-硫代吗啉基）-2，6-二[吡唑-1-基]吡啶成功地在金表面上形成自组装膜。
Drop-casting acetone solutions of [Fe(bpp)2][BF4]2 (bpp = 2,6-di[pyrazol-1-yl]pyridine) onto a HOPG surface affords unusual chain-of-beads nanostructures. The beads in each chain are similar in size, with diameters in the range of 2–6 nm and heights of up to 10 Å, which is consistent with them containing between 10–50 molecules of the compound. The beads can be classified into two types, which exhibit different conduction regimes by current-imaging tunnelling spectroscopy (CITS) which appear to correlate with their positions in the chains, and may correspond to molecules containing high-spin and low-spin iron centres. Similarly drop-cast films of the complex on a gold surface contain the intact [Fe(bpp)2][BF4]2 compound by XPS. 4-Mercapto-2,6-di[pyrazol-1-yl]pyridine undergoes substantial decomposition when deposited on gold, forming elemental sulfur, but 4-(N-thiomorpholinyl)-2,6-di[pyrazol-1-yl]pyridine successfully forms SAMs on a gold surface by XPS and ellipsometry.