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The interplay between the molecular shape and the intermolecular interaction plays a decisive role in self-assembled structures. Recently, inherent randomness of low ordered assemblies, resulting from lack of short- and long-range periodicities, has attracted significant attention due to the unique structural, electronic, and mechanical properties. Here, we present procrystalline self-assemblies of pentaphenyl cyclopentadienyl derivatives on Ag(111) and Au(111) with scanning tunneling microscopy, operating at 4.3 K under ultra-high vacuum conditions. Two examples, using five-fold symmetric molecules substituted with methyl or fluorine groups, show that weak interactions, such as π-π stacking, CH-π interactions, and CH···F hydrogen bonding, play a pivotal role in formation of the procrystalline assembly. Our results may give insights into the intricate relationship between the molecular shape and the intermolecular interaction in the formation of non-crystalline assemblies.

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  This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry Letters, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.4c01364

Keyword: pentaphenyl cyclopentadienyl derivatives, self-assembled structures, procrystalline self-assemblies, scanning tunneling microscopy, chemical strucure, molecular structure, phenyl

Date published: 2024-08-01

Publisher: American Chemical Society (ACS)

Journal:

• The Journal of Physical Chemistry Letters (ISSN: 19487185)

Funding:

• Ministry of Education, Culture, Sports, Science and Technology JP22H00325
• Ministry of Education, Culture, Sports, Science and Technology JP24K21721
• Ministry of Education, Culture, Sports, Science and Technology JP22H00285

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4600

First published URL: https://doi.org/10.1021/acs.jpclett.4c01364

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Updated at: 2025-07-20 08:30:16 +0900

Published on MDR: 2025-07-20 08:17:35 +0900