DOI: 10.1126/science.1225621. Bond-Order Discrimination by Atomic Force Microscopy

Bond-Order Discrimination by Atomic Force Microscopy

10.1126/science.1225621

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Visualizing Bond Order Bond lengths in conjugated molecules closely reflect individual bond order and are usually determined by diffraction methods. It is valuable to know bond order for rationalizing aromaticity, and reactivity and for chemical structure determination. Gross et al. (p. 1326 ; see the Perspective by Perez and the cover) differentiated the bond orders in individual molecules in the fullerene C 60 and in polyaromatic hydrocarbons by imaging with noncontact atomic force microscopy (AFM). The molecules were adsorbed onto a copper surface, and the AFM tip was decorated with a CO molecule, which was used to measure tip frequency shifts above the bonds and their apparent lengths. Multiple bonds appeared brighter in the images because of stronger Pauli repulsion, and their shorter length was amplified by bending of the CO at the tip apex.

Bibliography

Gross, L., Mohn, F., Moll, N., Schuler, B., Criado, A., GuitiÃ¡n, E., PeÃ±a, D., Gourdon, A., & Meyer, G. (2012). Bond-Order Discrimination by Atomic Force Microscopy. Science, 337(6100), 1326â1329.

Authors 9

Leo Gross (first)
Fabian Mohn (additional)
Nikolaj Moll (additional)
Bruno Schuler (additional)
Alejandro Criado (additional)
Enrique Guitián (additional)
Diego Peña (additional)
André Gourdon (additional)
Gerhard Meyer (additional)

References 36 Referenced 480

Dates

Type	When
Created	12 years, 11 months ago (Sept. 13, 2012, 11:06 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 9:39 a.m.)
Indexed	3 days, 22 hours ago (Aug. 23, 2025, 9:28 p.m.)
Issued	12 years, 11 months ago (Sept. 14, 2012)
Published	12 years, 11 months ago (Sept. 14, 2012)
Published Print	12 years, 11 months ago (Sept. 14, 2012)

Funders 0

None

BibTeX

@article{Gross_2012, title={Bond-Order Discrimination by Atomic Force Microscopy}, volume={337}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1225621}, DOI={10.1126/science.1225621}, number={6100}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Gross, Leo and Mohn, Fabian and Moll, Nikolaj and Schuler, Bruno and Criado, Alejandro and Guitián, Enrique and Peña, Diego and Gourdon, André and Meyer, Gerhard}, year={2012}, month=sep, pages={1326–1329} }

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  "abstract": "<jats:title>Visualizing Bond Order</jats:title>\n          <jats:p>\n            Bond lengths in conjugated molecules closely reflect individual bond order and are usually determined by diffraction methods. It is valuable to know bond order for rationalizing aromaticity, and reactivity and for chemical structure determination.\n            <jats:bold>\n              Gross\n              <jats:italic>et al.</jats:italic>\n            </jats:bold>\n            (p.\n            <jats:related-article xmlns:xlink=\"http://www.w3.org/1999/xlink\" ext-link-type=\"doi\" page=\"1326\" related-article-type=\"in-this-issue\" vol=\"337\" xlink:href=\"10.1126/science.1225621\">1326</jats:related-article>\n            ; see the Perspective by\n            <jats:bold>\n              <jats:related-article xmlns:xlink=\"http://www.w3.org/1999/xlink\" ext-link-type=\"doi\" issue=\"6100\" page=\"1305\" related-article-type=\"in-this-issue\" vol=\"337\" xlink:href=\"10.1126/science.1227726\">Perez</jats:related-article>\n            </jats:bold>\n            and the cover) differentiated the bond orders in individual molecules in the fullerene C\n            <jats:sub>60</jats:sub>\n            and in polyaromatic hydrocarbons by imaging with noncontact atomic force microscopy (AFM). The molecules were adsorbed onto a copper surface, and the AFM tip was decorated with a CO molecule, which was used to measure tip frequency shifts above the bonds and their apparent lengths. Multiple bonds appeared brighter in the images because of stronger Pauli repulsion, and their shorter length was amplified by bending of the CO at the tip apex.\n          </jats:p>",
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