The Role of Metal Adatoms in a Surface‐Assisted Cyclodehydrogenation Reaction on a Gold Surface

Björk, Jonas; Sánchez‐Sánchez, Carlos; Chen, Qiang; Pignedoli, Carlo A.; Rosen, Johanna; Ruffieux, Pascal; Feng, Xinliang; Narita, Akimitsu; Müllen, Klaus; Fasel, Roman (2022). The Role of Metal Adatoms in a Surface‐Assisted Cyclodehydrogenation Reaction on a Gold Surface. Angewandte Chemie (International ed.), 61(49), e202212354. Wiley-VCH 10.1002/anie.202212354

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Dehydrogenation reactions are key steps in many metal-catalyzed chemical processes and in the on-surface synthesis of atomically precise nanomaterials. The principal role of the metal substrate in these reactions is undisputed, but the role of metal adatoms remains, to a large extent, unanswered, particularly on gold substrates. Here, we discuss their importance by studying the surface-assisted cyclodehydrogenation on Au(111) as an ideal model case. We choose a polymer theoretically predicted to give one of two cyclization products depending on the presence or absence of gold adatoms. Scanning probe microscopy experiments observe only the product associated with adatoms. We challenge the prevalent understanding of surface-assisted cyclodehydrogenation, unveiling the catalytic role of adatoms and their effect on regioselectivity. The study adds new perspectives to the understanding of metal catalysis and the design of on-surface synthesis protocols for novel carbon nanomaterials.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Fasel, Roman

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

1433-7851

Publisher:

Wiley-VCH

Language:

English

Submitter:

Roman Fasel

Date Deposited:

07 Feb 2023 16:06

Last Modified:

12 Feb 2023 02:26

Publisher DOI:

10.1002/anie.202212354

PubMed ID:

36217889

BORIS DOI:

10.48350/178474

URI:

https://boris.unibe.ch/id/eprint/178474

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