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Issue 1, 2017
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On-surface synthesis approach to preparing one-dimensional organometallic and poly-p-phenylene chains

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Abstract

On-surface Ullmann coupling reactions of dibromo-biphenyl and diiodo-biphenyl molecules on Ag(111), Cu(111), Au(111) and Au(100) and by deposited extrinsic Ag and Ni atoms were systematically explored. Poly-p-phenylene polymer chains turned out to be the final coupling products. Different organometallic polymer chains, [–Ph2Ag–]n, [–Ph2Cu–]n, and [–Ph2Ni–]n, were synthesized as stable intermediates during the coupling reactions. These intermediates were confirmed and verified by X-ray photoelectronic spectroscopy, scanning tunnelling spectroscopy and tip manipulations. On Au surfaces, coupling products were achieved directly from halogenated precursors without formation of the Au-containing organometallic intermediates. Magnetic organometallic polymer chains were prepared by Ullmann coupling of dibromo-biphenyl activated by extrinsic Ni atoms on Au(100) surface and were confirmed by Kondo resonance measurement. Such an on-surface preparation strategy may provide an efficient approach to preparing unentangled organometallic and pure organic polymer chains and subsequently measuring their properties at surfaces.

Graphical abstract: On-surface synthesis approach to preparing one-dimensional organometallic and poly-p-phenylene chains

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Publication details

The article was received on 27 Jul 2016, accepted on 26 Aug 2016 and first published on 07 Sep 2016


Article type: Research Article
DOI: 10.1039/C6QM00142D
Citation: Mater. Chem. Front., 2017,1, 119-127
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    On-surface synthesis approach to preparing one-dimensional organometallic and poly-p-phenylene chains

    X. Zhou, F. Bebensee, Q. Shen, R. Bebensee, F. Cheng, Y. He, H. Su, W. Chen, G. Q. Xu, F. Besenbacher, T. R. Linderoth and K. Wu, Mater. Chem. Front., 2017, 1, 119
    DOI: 10.1039/C6QM00142D

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