Snapshots of Dynamic Adaptation: Two-Dimensional Molecular Architectonics with Linear Bis-Hydroxamic Acid Modules

Chao Jing, Bodong Zhang, Sabine Synkule, Maryam Ebrahimi, Alexander Riss, Willi Auwärter, Li Jiang, Guillaume Médard, Joachim Reichert, Johannes V. Barth, Anthoula C. Papageorgiou

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Linear modules equipped with two terminal hydroxamic acid groups act as the building block of diverse two-dimensional supramolecular motifs and patterns with room-temperature stability on the close-packed single-crystal surfaces of silver and gold, revealing a complex self-assembly scenario. By combining multiple investigation techniques (scanning tunneling microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and density functional theory calculations), we analyze the characteristics of the ordered assemblies which range from close-packed structures to polyporous networks featuring an exceptionally extended primitive unit cell with a side length exceeding 7 nm. The polyporous network shows potential for hosting and promoting the formation of chiral supramolecules, whereas a transition from 1D chiral randomness to an ordered racemate is discovered in a different porous phase. We correlate the observed structural changes to the adaptivity of the building block and surface-induced changes in the chemical state of the hydroxamic acid functional group.

Original languageEnglish
Pages (from-to)18948-18956
Number of pages9
JournalAngewandte Chemie International Edition in English
Volume58
Issue number52
DOIs
StatePublished - 19 Dec 2019

Keywords

  • atomic force microscopy
  • host–guest systems
  • hydroxamic acid
  • scanning tunneling microscopy
  • two-dimensional nanostructures

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