Luca Camilli*, Conor Hogan*, Deborah Romito, Luca Persichetti, Antonio Caporale, Maurizia Palummo, Marco Di Giovannantonio and Davide Bonifazi*,
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引用次数: 0
Abstract
Chalcogen bonding interactions (ChBIs) have been widely employed to create ordered noncovalent assemblies in solids and liquids. Yet, their ability to engineer molecular self-assembly on surfaces has not been demonstrated. Here, we report the first demonstration of on-surface molecular recognition solely governed by ChBIs. Scanning tunneling microscopy and ab initio calculations reveal that a pyrenyl derivative can undergo noncovalent chiral dimerization on the Au(111) surface through double Ch···N interactions involving Te- or Se-containing chalcogenazolo pyridine motifs. In contrast, reference chalcogenazole counterparts lacking the pyridyl moiety fail to form regular self-assemblies on Au, resulting in disordered assemblies.
钙原键相互作用(ChBIs)已被广泛用于在固体和液体中创建有序的非共价组装。然而,它们在表面进行分子自组装的能力尚未得到证实。在这里,我们首次报告了完全由 ChBIs 控制的表面分子识别能力。扫描隧道显微镜和 ab initio 计算显示,一种芘衍生物可以在 Au(111) 表面通过含 Te 或 Se 的醛基唑吡啶基团的双 Ch-N 相互作用进行非共价手性二聚化。与此相反,缺少吡啶基的醛基氮唑参照物无法在金上形成规则的自组装,从而导致无序组装。