Interchain Interactions Mediated by Br Adsorbates in Arrays of Metal–Organic Hybrid Chains on Ag(111)
Interchain Interactions Mediated by Br Adsorbates in Arrays of Metal–Organic Hybrid Chains on Ag(111)
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DOI：
10.1021/jp203129f
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发表时间：
2011-07
影响因子：
3.7
通讯作者：
Jihun Park;Kyeyeop Kim;K. Chung;Jong Keon Yoon;Howon Kim;Seungwu Han;S. Kahng
中科院分区：
文献类型：
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作者：
Jihun Park;Kyeyeop Kim;K. Chung;Jong Keon Yoon;Howon Kim;Seungwu Han;S. Kahng
用扫描隧道显微镜和从头计算研究了金属-有机杂化链阵列中的链间相互作用。通过9，10-二溴菲中的溴-碳键在银(111)上的催化断裂，自组装了一系列具有银-蒽基双自由基的杂化链。提出了观察到的链结构的原子模型。链中的银原子交替地位于中空位置，形成了轻微的Z字形结构。在杂化链之间，溴原子位于空位，形成Br···H分子间键。结果表明，苯基双自由基有两个不同的表观高度，这可以通过考虑Br····H分子间键和链内空间斥力来解释。当杂化链被操纵技术横向移动时，BR吸附与链一起移动，这意味着它们是通过Br····H分子间键稳定的。
Interchain interactions in arrays of metal–organic hybrid chains were studied using scanning tunneling microscopy and ab initio calculations. The array of hybrid chains having a Ag–anthryl biradical were self-assembled by catalytic scission of Br–C bonds in 9,10-dibromoanthracene on Ag(111). An atomic model for the observed chain structures was proposed. Ag atoms in chains were alternatingly located at hollow sites, making slightly zigzaging structures. Between the hybrid chains, Br atoms located at hollow sites to form Br···H intermolecular bonds. Anthryl biradicals had two different apparent heights; this was explained by considering Br···H intermolecular bonds and intrachain steric repulsion. When a hybrid chain was laterally moved by manipulation techniques, Br adsorbates moved together with the chain, implying that they are stabilized by Br···H intermolecular bonds.