"Naked" iron-5,10,15-triphenylcorrole on Cu(111): observation of chirality on a surface and manipulation of multiple conformational states by STM.
"Naked" iron-5,10,15-triphenylcorrole on Cu(111): observation of chirality on a surface and manipulation of multiple conformational states by STM.
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Cu(111) 上的“裸”铁-5,10,15-三苯基咯咯：观察表面手性并通过 STM 操纵多种构象状态。
DOI：
10.1021/ja8059478
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发表时间：
2008
影响因子：
15
通讯作者：
R. Wiesendanger
中科院分区：
文献类型：
--
作者：
S. Kuck;G. Hoffmann;M. Bröring;Martin Fechtel;M. Funk;R. Wiesendanger
在过去的十年中，金属卟啉类化合物中的一种新成员--单碳短科罗尔化合物已经发展成为一种非常容易获得和容易调节的化合物，在材料科学和催化方面具有许多潜在的应用。除了结构上相关的铁卟啉外，所有试图大量制备和研究“裸露”的三苯基铁分子(FeTPC)的尝试都失败了。在这里，我们证明了FeTPC作为吸附在表面上的稳定性。扫描隧道显微镜的局域研究表明，随着FeTPC以鞍形构象的形式吸附，表面诱导手性是其结果。使用扫描隧道显微镜作为局部操作工具，单个分子可以在不同的取向和构象之间可控地切换。即使在吸附过程中不利的构象也是可行的。目前的实验表明，金属化腐蚀剂是一类非常有趣的金属卟啉类化合物，但与公认的卟啉类化合物相比，通过手性增加了额外的实验自由度。
A new member of the metalloporphyrinoid class, the one-carbon short corrole, has been developed in the past decade to a very accessible and easily tunable compound with many potential applications in material science and catalysis. Other than for the structurally related iron porphyrins, all attempts to prepare and study the "naked" iron triphenylcorrole molecule (FeTPC) in bulk have failed. Here, we demonstrate stabilization of FeTPC as adsorbates on a surface. Local investigations by means of scanning tunneling microscopy reveal that along with the adsorption of FeTPC in a saddle conformation, surface induced chirality is the result. Using scanning tunneling microscopy as a local manipulation tool, individual molecules can be controllably switched between different orientations and conformations. Even conformations which are unfavorable during the adsorption process are feasible. The presented experiments demonstrate that metalated corroles are a highly interesting class of metalloporphyrinoids for local investigations but, in comparison with the well established class of porphyrins, add an additional degree of experimental freedom via chirality.