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Pozo I, Cobas A, Peña D, Guitián E, Pérez D. Toward 2-Thiophyne: Ketocarbene versus Hetaryne Intermediates from 2-(Trimethylsilyl)thiophen-3-yl Triflate. Org Lett 2021; 23:7376-7380. [PMID: 34515492 DOI: 10.1021/acs.orglett.1c02552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of 2-(trimethylsilyl)thiophen-3-yl triflate with CsF in the presence of 2,3,4,5-tetraphenylcyclopentadienone affords 4,5,6,7-tetraphenylbenzo[b]thiophene, as it would be expected from the hypothesized generation and trapping of 2-thiophyne. However, a detailed experimental and computational study discards the intermediacy of this elusive 5-membered hetaryne. Instead, a complex mechanism involving the generation of an intermediate ketocarbene, which adds to the cyclopentadienone to give an isolable tricyclic intermediate, followed by thermal rearrangements, is proposed.
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Affiliation(s)
- Iago Pozo
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.,Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Agustín Cobas
- Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.,Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.,Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.,Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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2
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Zuzak R, Pozo I, Engelund M, Vilas-Varela M, Alonso JM, Guitián E, Pérez D, Peña D, Godlewski S. Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry. J Vis Exp 2021. [PMID: 33749671 DOI: 10.3791/62122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
On-surface synthesis has recently been regarded as a promising approach for the generation of new molecular structures. It has been particularly successful in the synthesis of graphene nanoribbons, nanographenes and intrinsically reactive and instable, yet attractive species. It is based on the combination of solution chemistry aimed at preparation of appropriate molecular precursors for further ultra-high vacuum surface assisted transformations. This approach also owes its success to an incredible development of characterization techniques, such as scanning tunneling/atomic force microscopy and related methods, which allow detailed, local characterization at atomic scale. While the surface-assisted synthesis can provide molecular nanostructures with outstanding precision, down to single atoms, it suffers from basing on metallic surfaces and often limited yield. Therefore, the extension of the approach away from metals and the struggle to increase productivity seem to be significant challenges toward wider applications. Herein, we demonstrate the on-surface synthesis approach for generation of non-planar nanographenes, which are synthesized through a combination of solution chemistry and sequential surface-assisted processes, together with the detailed characterization by scanning probe microscopy methods.
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Affiliation(s)
- Rafal Zuzak
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University
| | - Iago Pozo
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | | | - Manuel Vilas-Varela
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | - José M Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela
| | - Szymon Godlewski
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University;
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Eisenhut F, Kühne T, García F, Fernández S, Guitián E, Pérez D, Trinquier G, Cuniberti G, Joachim C, Peña D, Moresco F. Dodecacene Generated on Surface: Reopening of the Energy Gap. ACS Nano 2020; 14:1011-1017. [PMID: 31829618 DOI: 10.1021/acsnano.9b08456] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The acene series represents a model system to investigate the intriguing electronic properties of extended π-electron structures in the one-dimensional limit, which are important for applications in electronics and spintronics and for the fundamental understanding of electronic transport. Here, we present the on-surface generation of the longest acene obtained so far: dodecacene. Scanning tunneling spectroscopy gives access to the energy position and spatial distribution of its electronic states on the Au(111) surface. We observe that, after a progressive closing of the gap and a stabilization to about 1 eV at the length of decacene and undecacene, the energy gap of dodecacene unexpectedly increases to 1.4 eV. Considering the acene series as an exemplary general case, we discuss the evolution with length of the single tunneling resonances in comparison with ionization energy, electronic affinity, and optical gap.
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Affiliation(s)
- Frank Eisenhut
- Center for Advancing Electronics Dresden , TU Dresden , 01069 Dresden , Germany
- Institute for Materials Science , TU Dresden , 01069 Dresden , Germany
| | - Tim Kühne
- Center for Advancing Electronics Dresden , TU Dresden , 01069 Dresden , Germany
- Institute for Materials Science , TU Dresden , 01069 Dresden , Germany
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain
| | - Saleta Fernández
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain
| | - Georges Trinquier
- Laboratoire de Chimie et Physique Quantiques , IRSAMC-CNRS-UMR5626, Université Paul-Sabatier (Toulouse III) , 31062 Toulouse Cedex 4, France
| | - Gianaurelio Cuniberti
- Institute for Materials Science , TU Dresden , 01069 Dresden , Germany
- Dresden Center for Computational Materials Science (DCMS) , TU Dresden , 01069 Dresden , Germany
| | - Christian Joachim
- GNS & MANA Satellite, CEMES, CNRS , 29 rue J. Marvig , 31055 Toulouse Cedex, France
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain
| | - Francesca Moresco
- Center for Advancing Electronics Dresden , TU Dresden , 01069 Dresden , Germany
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Abstract
The synthesis and reactivity of an efficient precursor of a triphenylene-based trisaryne synthon is reported for the first time.
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Affiliation(s)
- Iago Pozo
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica. Universidade de Santiago de Compostela
- 15782-Santiago de Compostela
- Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica. Universidade de Santiago de Compostela
- 15782-Santiago de Compostela
- Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica. Universidade de Santiago de Compostela
- 15782-Santiago de Compostela
- Spain
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica. Universidade de Santiago de Compostela
- 15782-Santiago de Compostela
- Spain
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Pozo I, Majzik Z, Pavliček N, Melle-Franco M, Guitián E, Peña D, Gross L, Pérez D. Revisiting Kekulene: Synthesis and Single-Molecule Imaging. J Am Chem Soc 2019; 141:15488-15493. [PMID: 31525873 PMCID: PMC6786662 DOI: 10.1021/jacs.9b07926] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Four decades after the first (and only) reported synthesis of kekulene, this emblematic cycloarene has been obtained again through an improved route involving the construction of a key synthetic intermediate, 5,6,8,9-tetrahydrobenzo[m]tetraphene, by means of a double Diels-Alder reaction between styrene and a versatile benzodiyne synthon. Ultra-high-resolution AFM imaging of single molecules of kekulene and computational calculations provide additional support for a molecular structure with a significant degree of bond localization in accordance with the resonance structure predicted by the Clar model.
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Affiliation(s)
- Iago Pozo
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Zsolt Majzik
- IBM Research-Zürich , 8803 Rüschlikon , Switzerland
| | | | - Manuel Melle-Franco
- CICECO, Aveiro Institute of Materials, Department of Chemistry , University of Aveiro , 3810-193 Aveiro , Portugal
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
| | - Leo Gross
- IBM Research-Zürich , 8803 Rüschlikon , Switzerland
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 Santiago de Compostela , Spain
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Pozo I, Guitián E, Pérez D, Peña D. Synthesis of Nanographenes, Starphenes, and Sterically Congested Polyarenes by Aryne Cyclotrimerization. Acc Chem Res 2019; 52:2472-2481. [PMID: 31411855 DOI: 10.1021/acs.accounts.9b00269] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In recent years, synthetic transformations based on aryne chemistry have become particularly popular, mostly due to the spread of methods to generate these highly reactive intermediates in a controlled manner under mild reaction conditions. In fact, aryne cycloadditions such as the Diels-Alder reaction are nowadays widely used for the efficient preparation of polycyclic aromatic compounds. In 1998, our group discovered that arynes can undergo transition metal-catalyzed reactions, a finding that opened new perspectives in aryne chemistry. In particular, Pd-catalyzed [2 + 2 + 2] cycloaddition of arynes allowed the straightforward synthesis of triphenylene derivatives such as starphenes or cloverphenes. We found that this reaction is compatible with different substituents and sterically demanding arynes as starting materials. This transformation is especially useful to increase the molecular complexity in one single step, transforming molecules formed by n cycles in structures with 3n + 1 cycles. In fact, we took advantage of this protocol to prepare a large variety of sterically congested polycyclic aromatic hydrocarbons such as helicenes or twisted polyarenes. Soon after the discovery of the reaction, the co-cyclotrimerization of arynes with other reaction partners, such as electron deficient alkynes, significantly expanded the potential of this transformation. Also the use of catalysts based on alternative metals besides Pd (e.g., Ni, Cu, Au) or the use of other strained intermediates such as cycloalkynes or cycloallenes added value to this reaction. In addition, we realized that the Pd-catalyzed aryne cyclotrimerization reaction is particularly useful for the bottom-up preparation of well-defined nanographenes by chemical methods. Although the extreme insolubility of these planar nanographenes hampered their manipulation and characterization by conventional methods, recent advances in single molecule on-surface characterization by atomic force microscopy (AFM) and scanning tunneling microscopy (STM) with functionalized tips under ultrahigh vacuum (UHV) conditions, permitted the impressive visualization of these nanographenes with submolecular resolution, together with the examination of the corresponding molecular orbital densities. Moreover, arynes have been shown to possess a rich on-surface chemistry. In particular, arynes have been generated and studied on-surface, showing that the reactivity is preserved even at cryogenic temperatures. On-surface aryne cyclotrimerization was also demonstrated to obtain large starphene derivatives. Therefore, it is expected that the combination of aryne cycloadditions and on-surface synthesis will provide notable findings in the near future, including the "à la carte" preparation of graphene materials or the synthesis of elusive molecules with unique properties.
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Affiliation(s)
- Iago Pozo
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Zuzak R, Pozo I, Engelund M, Garcia-Lekue A, Vilas-Varela M, Alonso JM, Szymonski M, Guitián E, Pérez D, Godlewski S, Peña D. Synthesis and reactivity of a trigonal porous nanographene on a gold surface. Chem Sci 2019; 10:10143-10148. [PMID: 32055368 PMCID: PMC6979371 DOI: 10.1039/c9sc03404h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/13/2019] [Indexed: 12/04/2022] Open
Abstract
Synthesis of a triporous nanographene with 102 sp2 carbon atoms by combining solution and surface chemistry.
The synthesis of porous nanographenes is a challenging task for solution chemistry, and thus, on-surface synthesis provides an alternative approach. Here, we report the synthesis of a triporous nanographene with 102 sp2 carbon atoms by combining solution and surface chemistry. The carbon skeleton was obtained by Pd-catalyzed cyclotrimerization of arynes in solution, while planarization of the molecule was achieved through two hierarchically organized on-surface cyclodehydrogenation reactions, intra- and inter-blade. Remarkably, the three non-planar [14]annulene pores of this nanographene further evolved at higher temperatures showing interesting intra-porous on-surface reactivity.
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Affiliation(s)
- Rafal Zuzak
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM , Faculty of Physics , Astronomy and Applied Computer Science , Jagiellonian University , Łojasiewicza 11 , PL 30-348 Kraków , Poland .
| | - Iago Pozo
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
| | - Mads Engelund
- Espeem S.A.R.L. , L-4365 Esch-sur-Alzette , Luxembourg
| | - Aran Garcia-Lekue
- Donostia International Physics Center, DIPC , Paseo Manuel de Lardizabal 4 , E-20018 Donostia-San Sebastián , Spain.,IKERBASQUE , Basque Foundation for Science , E-48013 Bilbao , Spain
| | - Manuel Vilas-Varela
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
| | - José M Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
| | - Marek Szymonski
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM , Faculty of Physics , Astronomy and Applied Computer Science , Jagiellonian University , Łojasiewicza 11 , PL 30-348 Kraków , Poland .
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
| | - Szymon Godlewski
- Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM , Faculty of Physics , Astronomy and Applied Computer Science , Jagiellonian University , Łojasiewicza 11 , PL 30-348 Kraków , Poland .
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782-Santiago de Compostela , Spain .
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8
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Affiliation(s)
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782- Santiago de Compostela Spain
| | | | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782- Santiago de Compostela Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782- Santiago de Compostela Spain
| | - Leo Gross
- IBM Research—Zurich 8803 Rüschlikon Switzerland
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química OrgánicaUniversidade de Santiago de Compostela 15782- Santiago de Compostela Spain
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9
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Schulz F, García F, Kaiser K, Pérez D, Guitián E, Gross L, Peña D. Exploring a Route to Cyclic Acenes by On-Surface Synthesis. Angew Chem Int Ed Engl 2019; 58:9038-9042. [PMID: 31026104 PMCID: PMC6618096 DOI: 10.1002/anie.201902784] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/12/2019] [Indexed: 11/08/2022]
Abstract
A route to generate cyclacenes by on-surface synthesis is explored. We started by synthesizing two tetraepoxycyclacenes by sequences of Diels-Alder cycloadditions. Subsequently, these molecules were deposited onto Cu(111) and scanning-tunneling-microscopy(STM)-based atom manipulation was employed to dissociate the oxygen atoms. Atomic force microscopy (AFM) with CO-functionalized tips enabled the detailed characterization of the reaction products and revealed that, at most, two oxygens per molecule could be removed. Importantly, our experimental results suggest that the generation of cyclacenes by the described route might be possible for larger epoxycyclacenes.
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Affiliation(s)
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | | | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Leo Gross
- IBM Research-Zurich, 8803, Rüschlikon, Switzerland
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
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10
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Fatayer S, Moll N, Collazos S, Pérez D, Guitián E, Peña D, Gross L, Meyer G. Controlled Fragmentation of Single Molecules with Atomic Force Microscopy by Employing Doubly Charged States. Phys Rev Lett 2018; 121:226101. [PMID: 30547655 DOI: 10.1103/physrevlett.121.226101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Indexed: 06/09/2023]
Abstract
By atom manipulation we performed on-surface chemical reactions of a single molecule on a multilayer insulating film using noncontact atomic force microscopy. The single-electron sensitivity of atomic force microscopy allows us to follow the addition of single electrons to the molecule and the investigation of the reaction products. By performing a novel strategy based on long-lived doubly charged states a single molecule is fragmented. The fragmentation can be reverted by again changing the charge state of the system, characterizing a reversible reaction. The experimental results in addition to density-functional theory provide insight into the charge states of the different products and reaction pathways. Similar molecular systems could be used as charge-transfer units and to induce reversible chemical reactions.
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Affiliation(s)
- Shadi Fatayer
- IBM Research-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Nikolaj Moll
- IBM Research-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Sara Collazos
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Leo Gross
- IBM Research-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Gerhard Meyer
- IBM Research-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland
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Vilas-Varela M, Fatayer S, Majzik Z, Pérez D, Guitián E, Gross L, Peña D. [19]Dendriphene: A 19-Ring Dendritic Nanographene. Chemistry 2018; 24:17697-17700. [DOI: 10.1002/chem.201805140] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Manuel Vilas-Varela
- Centro Singular de Investigación en Química Biolóxica e, Materiais Moleculares (CIQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | | | - Zsolt Majzik
- IBM Research-Zurich; 8803 Rüschlikon Switzerland
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e, Materiais Moleculares (CIQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e, Materiais Moleculares (CIQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Leo Gross
- IBM Research-Zurich; 8803 Rüschlikon Switzerland
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e, Materiais Moleculares (CIQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
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12
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Krüger J, Eisenhut F, Skidin D, Lehmann T, Ryndyk DA, Cuniberti G, García F, Alonso JM, Guitián E, Pérez D, Peña D, Trinquier G, Malrieu JP, Moresco F, Joachim C. Electronic Resonances and Gap Stabilization of Higher Acenes on a Gold Surface. ACS Nano 2018; 12:8506-8511. [PMID: 30059612 DOI: 10.1021/acsnano.8b04046] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
On-surface synthesis provides a powerful method for the generation of long acene molecules, making possible the detailed investigation of the electronic properties of single higher acenes on a surface. By means of scanning tunneling microscopy and spectroscopy combined with theoretical considerations, we discuss the polyradical character of the ground state of higher acenes as a function of the number of linearly fused benzene rings. We present energy and spatial mapping of the tunneling resonances of hexacene, heptacene, and decacene, and discuss the role of molecular orbitals in the observed tunneling conductance maps. We show that the energy gap between the first electronic tunneling resonances below and above the Fermi energy stabilizes to a finite value, determined by a first diradical electronic perturbative contribution to the polyacene electronic ground state. Up to decacene, the main contributor to the ground state of acenes remains the lowest-energy closed-shell electronic configuration.
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Affiliation(s)
- Justus Krüger
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
| | - Frank Eisenhut
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
| | - Dmitry Skidin
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
| | - Thomas Lehmann
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
| | - Dmitry A Ryndyk
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Bremen Center for Computational Materials Science (BCCMS) , Universität Bremen , 28359 Bremen , Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
- Dresden Center for Computational Materials Science (DCMS) , TU Dresden , 01062 Dresden , Germany
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 - Santiago de Compostela , Spain
| | - José M Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 - Santiago de Compostela , Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 - Santiago de Compostela , Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 - Santiago de Compostela , Spain
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica , Universidade de Santiago de Compostela , 15782 - Santiago de Compostela , Spain
| | - Georges Trinquier
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626 , Université Paul-Sabatier (Toulouse III) , 31062 Toulouse Cedex 4, France
| | - Jean-Paul Malrieu
- Laboratoire de Chimie et Physique Quantiques, IRSAMC-CNRS-UMR5626 , Université Paul-Sabatier (Toulouse III) , 31062 Toulouse Cedex 4, France
| | - Francesca Moresco
- Institute for Materials Science and Max Bergmann Center of Biomaterials , TU Dresden , 01062 Dresden , Germany
- Center for Advancing Electronics Dresden , TU Dresden , 01062 Dresden , Germany
| | - Christian Joachim
- Centre d'élaboration de matériaux et d'études structurale (CEMES), UPR 8011 CNRS , Nanosciences Group & MANA Satellite , 29 Rue J. Marvig , P.O. Box 94347, 31055 Toulouse , France
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13
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Eisenhut F, Krüger J, Skidin D, Nikipar S, Alonso JM, Guitián E, Pérez D, Ryndyk DA, Peña D, Moresco F, Cuniberti G. Hexacene generated on passivated silicon. Nanoscale 2018; 10:12582-12587. [PMID: 29938293 DOI: 10.1039/c8nr03422b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
On-surface synthesis represents a successful strategy to obtain designed molecular structures on an ultra-clean metal substrate. While metal surfaces are known to favor adsorption, diffusion, and chemical bonding between molecular groups, on-surface synthesis on non-metallic substrates would allow the electrical decoupling of the resulting molecule from the surface, favoring application to electronics and spintronics. Here, we demonstrate the on-surface generation of hexacene by surface-assisted reduction on a H-passivated Si(001) surface. The reaction, observed by scanning tunneling microscopy and spectroscopy, is probably driven by the formation of Si-O complexes at dangling bond defects. Supported by density functional theory calculations, we investigate the interaction of hexacene with the passivated silicon surface, and with single silicon dangling bonds.
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Affiliation(s)
- Frank Eisenhut
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01069 Dresden, Germany
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14
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Fatayer S, Poddar NB, Quiroga S, Schulz F, Schuler B, Kalpathy SV, Meyer G, Pérez D, Guitián E, Peña D, Wornat MJ, Gross L. Atomic Force Microscopy Identifying Fuel Pyrolysis Products and Directing the Synthesis of Analytical Standards. J Am Chem Soc 2018; 140:8156-8161. [DOI: 10.1021/jacs.8b02525] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - Nimesh B. Poddar
- Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Sabela Quiroga
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | | | | | - Subramanian V. Kalpathy
- Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | | | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Mary J. Wornat
- Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Leo Gross
- IBM Research−Zurich, 8803 Rüschlikon, Switzerland
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15
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Sulleiro MV, Quiroga S, Peña D, Pérez D, Guitián E, Criado A, Prato M. Microwave-induced covalent functionalization of few-layer graphene with arynes under solvent-free conditions. Chem Commun (Camb) 2018; 54:2086-2089. [PMID: 29334096 DOI: 10.1039/c7cc08676h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A non-conventional modification of exfoliated few-layer graphene (FLG) with different arynes under microwave (MW) irradiation and solvent-free conditions is reported. The described approach allows reaching fast, efficient and mild covalent functionalization of FLG.
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Affiliation(s)
- M V Sulleiro
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa, 1, 34127 Trieste, Italy.
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16
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Hieulle J, Carbonell-Sanromà E, Vilas-Varela M, Garcia-Lekue A, Guitián E, Peña D, Pascual JI. On-Surface Route for Producing Planar Nanographenes with Azulene Moieties. Nano Lett 2018; 18:418-423. [PMID: 29232951 DOI: 10.1021/acs.nanolett.7b04309] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Large aromatic carbon nanostructures are cornerstone materials due to their increasingly active role in functional devices, but their synthesis in solution encounters size and shape limitations. New on-surface strategies facilitate the synthesis of large and insoluble planar systems with atomic-scale precision. While dehydrogenation is usually the chemical zipping reaction building up large aromatic carbon structures, mostly benzenoid structures are being produced. Here, we report on a new cyclodehydrogenation reaction transforming a sterically stressed precursor with conjoined cove regions into a planar carbon platform by incorporating azulene moieties in their interior. Submolecular resolution STM is used to characterize this exotic large polycyclic aromatic compound on Au(111) yielding unprecedented insight into a dehydrogenative intramolecular aryl-aryl coupling reaction. The resulting polycyclic aromatic carbon structure shows a [18]annulene core hosting peculiar pore states confined at the carbon cavity.
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Affiliation(s)
| | | | - Manuel Vilas-Varela
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidad de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Aran Garcia-Lekue
- Donostia International Physics Center (DIPC) , 20018 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidad de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Diego Peña
- Centro Singular de Investigación en Quı́mica Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Quı́mica Orgánica, Universidad de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Jose Ignacio Pascual
- CIC nanoGUNE , 20018 San Sebastián-Donostia, Spain
- Ikerbasque, Basque Foundation for Science , 48013 Bilbao, Spain
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17
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Alonso JM, Quiroga S, Codony S, Turcu AL, Barniol-Xicota M, Pérez D, Guitián E, Vázquez S, Peña D. Palladium-catalyzed cocyclotrimerization of arynes with a pyramidalized alkene. Chem Commun (Camb) 2018; 54:5996-5999. [DOI: 10.1039/c8cc03188f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A pyramidalized alkene and diverse arynes are generated in the presence of a Pd-catalyst to afford [2+2+2] cocycloaddition products.
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Affiliation(s)
- José M. Alonso
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Sabela Quiroga
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Sandra Codony
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC)
- Facultat de Farmàcia i Ciències de l’Alimentació, and Institute of Biomedicine (IBUB)
- Universitat de Barcelona. Av. Joan XXIII, 27-31
- 08028 Barcelona
- Spain
| | - Andreea L. Turcu
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC)
- Facultat de Farmàcia i Ciències de l’Alimentació, and Institute of Biomedicine (IBUB)
- Universitat de Barcelona. Av. Joan XXIII, 27-31
- 08028 Barcelona
- Spain
| | - Marta Barniol-Xicota
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC)
- Facultat de Farmàcia i Ciències de l’Alimentació, and Institute of Biomedicine (IBUB)
- Universitat de Barcelona. Av. Joan XXIII, 27-31
- 08028 Barcelona
- Spain
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Santiago Vázquez
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC)
- Facultat de Farmàcia i Ciències de l’Alimentació, and Institute of Biomedicine (IBUB)
- Universitat de Barcelona. Av. Joan XXIII, 27-31
- 08028 Barcelona
- Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS)
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
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18
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Zuzak R, Castro-Esteban J, Brandimarte P, Engelund M, Cobas A, Piątkowski P, Kolmer M, Pérez D, Guitián E, Szymonski M, Sánchez-Portal D, Godlewski S, Peña D. Building a 22-ring nanographene by combining in-solution and on-surface syntheses. Chem Commun (Camb) 2018; 54:10256-10259. [DOI: 10.1039/c8cc05353g] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nanographene formed by the fusion of 22 benzene rings has been prepared by combining in-solution cycloaddition reactions and on-surface cyclodehydrogenations.
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19
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Godlewski S, Engelund M, Peña D, Zuzak R, Kawai H, Kolmer M, Caeiro J, Guitián E, Vollhardt KPC, Sánchez-Portal D, Szymonski M, Pérez D. Site-selective reversible Diels–Alder reaction between a biphenylene-based polyarene and a semiconductor surface. Phys Chem Chem Phys 2018; 20:11037-11046. [DOI: 10.1039/c8cp01094c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A multidisciplinary study reveals the chemistry of a polycyclic conjugated molecule on a Ge(001):H surface.
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Affiliation(s)
- Szymon Godlewski
- Centre for Nanometer-Scale Science and Advanced Materials
- NANOSAM
- Faculty of Physics
- Astronomy and Applied Computer Science
- Jagiellonian University
| | - Mads Engelund
- Centro de Física de Materiales CSIC-UPV/EHU and DIPC
- Donostia-San Sebastián
- Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Rafał Zuzak
- Centre for Nanometer-Scale Science and Advanced Materials
- NANOSAM
- Faculty of Physics
- Astronomy and Applied Computer Science
- Jagiellonian University
| | - Hiroyo Kawai
- Institute of Materials Research and Engineering
- 138634 Singapore
| | - Marek Kolmer
- Centre for Nanometer-Scale Science and Advanced Materials
- NANOSAM
- Faculty of Physics
- Astronomy and Applied Computer Science
- Jagiellonian University
| | - Jorge Caeiro
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | | | | | - Marek Szymonski
- Centre for Nanometer-Scale Science and Advanced Materials
- NANOSAM
- Faculty of Physics
- Astronomy and Applied Computer Science
- Jagiellonian University
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
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20
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Pavliček N, Majzik Z, Collazos S, Meyer G, Pérez D, Guitián E, Peña D, Gross L. Generation and Characterization of a meta-Aryne on Cu and NaCl Surfaces. ACS Nano 2017; 11:10768-10773. [PMID: 29028295 DOI: 10.1021/acsnano.7b06137] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We describe the generation of a meta-aryne at low temperature (T = 5 K) using atomic manipulation on Cu(111) and on bilayer NaCl on Cu(111). We observe different voltage thresholds for dehalogenation of the precursor and different reaction products depending on the substrate surface. The chemical structure is resolved by atomic force microscopy with CO-terminated tips, revealing the radical positions and confirming a diradical rather than an anti-Bredt olefin structure for this meta-aryne on NaCl.
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Affiliation(s)
- Niko Pavliček
- IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Zsolt Majzik
- IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Sara Collazos
- CIQUS, Universidade de Santiagode Compostela , 15782 Santiago de Compostela, Spain
| | - Gerhard Meyer
- IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
| | - Dolores Pérez
- CIQUS, Universidade de Santiagode Compostela , 15782 Santiago de Compostela, Spain
| | - Enrique Guitián
- CIQUS, Universidade de Santiagode Compostela , 15782 Santiago de Compostela, Spain
| | - Diego Peña
- CIQUS, Universidade de Santiagode Compostela , 15782 Santiago de Compostela, Spain
| | - Leo Gross
- IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland
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21
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Krüger J, García F, Eisenhut F, Skidin D, Alonso JM, Guitián E, Pérez D, Cuniberti G, Moresco F, Peña D. Decacene: On-Surface Generation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706156] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Justus Krüger
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden; TU Dresden; 01069 Dresden Germany
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782- Santiago de Compostela Spain
| | - Frank Eisenhut
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden; TU Dresden; 01069 Dresden Germany
| | - Dmitry Skidin
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden; TU Dresden; 01069 Dresden Germany
| | - José M. Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782- Santiago de Compostela Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782- Santiago de Compostela Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782- Santiago de Compostela Spain
| | - Gianaurelio Cuniberti
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden; TU Dresden; 01069 Dresden Germany
| | - Francesca Moresco
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden; TU Dresden; 01069 Dresden Germany
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782- Santiago de Compostela Spain
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22
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Krüger J, García F, Eisenhut F, Skidin D, Alonso JM, Guitián E, Pérez D, Cuniberti G, Moresco F, Peña D. Decacene: On-Surface Generation. Angew Chem Int Ed Engl 2017; 56:11945-11948. [PMID: 28771920 DOI: 10.1002/anie.201706156] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Indexed: 11/11/2022]
Abstract
Acenes are intriguing molecules with unique electronic properties. The difficulties in their preparation owing to low stability under ambient conditions are apparent because successful syntheses of long unsubstituted acenes are still scarce, in spite of the great attention they have attracted. Only unsubstituted acenes up to heptacene have been isolated in bulk, with nonacene being the largest acene detected to date. Herein we use on-surface assisted reduction of tetraepoxy decacene precursors on Au(111) as the key step to generate unprecedented decacene which is visualized and its electronic resonances studied by scanning tunneling microscopy (STM) and spectroscopy (STS).
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Affiliation(s)
- Justus Krüger
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069, Dresden, Germany
| | - Fátima García
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Frank Eisenhut
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069, Dresden, Germany
| | - Dmitry Skidin
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069, Dresden, Germany
| | - José M Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
| | - Gianaurelio Cuniberti
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069, Dresden, Germany
| | - Francesca Moresco
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069, Dresden, Germany
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782-, Santiago de Compostela, Spain
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23
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Camps P, Lozano D, Guitián E, Peña D, Pérez D, Font-Bardia M, Llamas-Saíz AL. Straightforward Synthesis of a Vicinal Double-Bridgehead Iodo Trimethylsilyl Octacycle: Unprecedented Lack of Reactivity of the Silyl Group in the Presence of Fluoride Anions. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pelayo Camps
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC); Facultat de Farmàcia i Ciències de la Alimentació and Institut de Biomedicina (IBUB); Universitat de Barcelona; Av. Joan XXIII 27-31 08028 Barcelona Spain
| | - David Lozano
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC); Facultat de Farmàcia i Ciències de la Alimentació and Institut de Biomedicina (IBUB); Universitat de Barcelona; Av. Joan XXIII 27-31 08028 Barcelona Spain
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Mercè Font-Bardia
- Departament de Cristal·lografia; Mineralogia I Dipòsits Minerals; Universitat de Barcelona; Martí Franquès s/n 08028 Barcelona Spain
- Unitat de Difracció de RX; Centres Científics I Tecnològics de la Universitat de Barcelona (CCiTUB); Solé i Sabarís 1-3 08028 Barcelona Spain
| | - Antonio L. Llamas-Saíz
- Unidade de Raios X. RIAIDT; Edificio CACTUS; Universidade de Santiago de Compostela; Campus Vida 15782 Santiago de Compostela Spain
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24
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Schuler B, Zhang Y, Collazos S, Fatayer S, Meyer G, Pérez D, Guitián E, Harper MR, Kushnerick JD, Peña D, Gross L. Characterizing aliphatic moieties in hydrocarbons with atomic force microscopy. Chem Sci 2017; 8:2315-2320. [PMID: 28451335 PMCID: PMC5363392 DOI: 10.1039/c6sc04698c] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/11/2016] [Indexed: 01/01/2023] Open
Abstract
We designed and studied hydrocarbon model compounds by high-resolution noncontact atomic force microscopy. In addition to planar polycyclic aromatic moieties, these novel model compounds feature linear alkyl and cycloaliphatic motifs that exist in most hydrocarbon resources - particularly in petroleum asphaltenes and other petroleum fractions - or in lipids in biological samples. We demonstrate successful intact deposition by sublimation of the alkyl-aromatics, and differentiate aliphatic moieties from their aromatic counterparts which were generated from the former by atomic manipulation. The characterization by AFM in combination with atomic manipulation provides clear fingerprints of the aromatic and aliphatic moieties that will facilitate their assignment in a priori unknown samples.
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Affiliation(s)
- Bruno Schuler
- IBM Research - Zurich , Säumerstrasse 4 , 8803 Rüschlikon , Switzerland .
| | - Yunlong Zhang
- ExxonMobil Research and Engineering Company , Annandale , NJ 08801 , USA .
| | - Sara Collazos
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain .
| | - Shadi Fatayer
- IBM Research - Zurich , Säumerstrasse 4 , 8803 Rüschlikon , Switzerland .
| | - Gerhard Meyer
- IBM Research - Zurich , Säumerstrasse 4 , 8803 Rüschlikon , Switzerland .
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain .
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain .
| | - Michael R Harper
- ExxonMobil Research and Engineering Company , Annandale , NJ 08801 , USA .
| | | | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) , Departamento de Química Orgánica , Universidade de Santiago de Compostela , Santiago de Compostela 15782 , Spain .
| | - Leo Gross
- IBM Research - Zurich , Säumerstrasse 4 , 8803 Rüschlikon , Switzerland .
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25
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Krüger J, Eisenhut F, Alonso JM, Lehmann T, Guitián E, Pérez D, Skidin D, Gamaleja F, Ryndyk DA, Joachim C, Peña D, Moresco F, Cuniberti G. Imaging the electronic structure of on-surface generated hexacene. Chem Commun (Camb) 2016; 53:1583-1586. [PMID: 27990553 DOI: 10.1039/c6cc09327b] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Surface-assisted reduction of specially designed air-stable precursors allows us to study single hexacene molecules on Au(111) by scanning tunneling microscopy and spectroscopy, mapping with intramolecular resolution their extended electronic eigenstates.
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Affiliation(s)
- Justus Krüger
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden, 01069 Dresden, Germany.
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26
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de Oteyza DG, García-Lekue A, Vilas-Varela M, Merino-Díez N, Carbonell-Sanromà E, Corso M, Vasseur G, Rogero C, Guitián E, Pascual JI, Ortega JE, Wakayama Y, Peña D. Substrate-Independent Growth of Atomically Precise Chiral Graphene Nanoribbons. ACS Nano 2016; 10:9000-8. [PMID: 27548516 PMCID: PMC5043421 DOI: 10.1021/acsnano.6b05269] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 08/22/2016] [Indexed: 05/20/2023]
Abstract
Contributing to the need for new graphene nanoribbon (GNR) structures that can be synthesized with atomic precision, we have designed a reactant that renders chiral (3,1)-GNRs after a multistep reaction including Ullmann coupling and cyclodehydrogenation. The nanoribbon synthesis has been successfully proven on different coinage metals, and the formation process, together with the fingerprints associated with each reaction step, has been studied by combining scanning tunneling microscopy, core-level spectroscopy, and density functional calculations. In addition to the GNR's chiral edge structure, the substantial GNR lengths achieved and the low processing temperature required to complete the reaction grant this reactant extremely interesting properties for potential applications.
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Affiliation(s)
- Dimas G. de Oteyza
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, 48011 Bilbao, Spain
- Materials
Physics Center, Centro de Física
de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
| | - Aran García-Lekue
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, 48011 Bilbao, Spain
| | - Manuel Vilas-Varela
- Centro
de Investigación en Química Biolóxica e Materiais
Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
| | - Néstor Merino-Díez
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- CIC
nanoGUNE, Avenida de
Tolosa 76, 20018 San Sebastián, Spain
| | | | - Martina Corso
- Ikerbasque,
Basque Foundation for Science, 48011 Bilbao, Spain
- Materials
Physics Center, Centro de Física
de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
- CIC
nanoGUNE, Avenida de
Tolosa 76, 20018 San Sebastián, Spain
| | - Guillaume Vasseur
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Materials
Physics Center, Centro de Física
de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
| | - Celia Rogero
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Materials
Physics Center, Centro de Física
de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
| | - Enrique Guitián
- Centro
de Investigación en Química Biolóxica e Materiais
Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
| | - Jose Ignacio Pascual
- Ikerbasque,
Basque Foundation for Science, 48011 Bilbao, Spain
- CIC
nanoGUNE, Avenida de
Tolosa 76, 20018 San Sebastián, Spain
| | - J. Enrique Ortega
- Donostia
International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Materials
Physics Center, Centro de Física
de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Física Aplicada I, Universidad
del País Vasco, 20018 San Sebastián, Spain
| | - Yutaka Wakayama
- International
Center of Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Diego Peña
- Centro
de Investigación en Química Biolóxica e Materiais
Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago
de Compostela, Spain
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27
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Krüger J, Pavliček N, Alonso JM, Pérez D, Guitián E, Lehmann T, Cuniberti G, Gourdon A, Meyer G, Gross L, Moresco F, Peña D. Tetracene Formation by On-Surface Reduction. ACS Nano 2016; 10:4538-4542. [PMID: 26963892 DOI: 10.1021/acsnano.6b00505] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present the on-surface reduction of diepoxytetracenes to form genuine tetracene on Cu(111). The conversion is achieved by scanning tunneling microscopy (STM) tip-induced manipulation as well as thermal activation and is conclusively demonstrated by means of atomic force microscopy (AFM) with atomic resolution. We observe that the metallic surface plays an important role in the deoxygenation and for the planarization after bond cleavage.
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Affiliation(s)
- Justus Krüger
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden , 01069 Dresden, Germany
| | | | - José M Alonso
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Thomas Lehmann
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden , 01069 Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden , 01069 Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), TU Dresden , 01069 Dresden, Germany
| | - André Gourdon
- Centre d'Élaboration de Matériaux et d'Études Structurales (CEMES) , UPR 8011 CNRS, Nanosciences Group, 29 Rue Jeanne Marvig, P.O. Box 94347, 31055 Toulouse, France
| | | | - Leo Gross
- IBM Research-Zurich , 8803 Rüschlikon, Switzerland
| | - Francesca Moresco
- Institute for Materials Science, Max Bergmann Center of Biomaterials, and Center for Advancing Electronics Dresden, TU Dresden , 01069 Dresden, Germany
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela , Santiago de Compostela 15782, Spain
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28
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García D, Rodríguez-Pérez L, Herranz MA, Peña D, Guitián E, Bailey S, Al-Galiby Q, Noori M, Lambert CJ, Pérez D, Martín N. A C60-aryne building block: synthesis of a hybrid all-carbon nanostructure. Chem Commun (Camb) 2016; 52:6677-80. [DOI: 10.1039/c5cc10462a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covalent all-carbon few layer graphene and [60]fullerene conjugates can be easily formed from a versatile [60]fullerene-benzyne building block.
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29
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Pozo I, Cobas A, Peña D, Guitián E, Pérez D. 1,7-Naphthodiyne: a new platform for the synthesis of novel, sterically congested PAHs. Chem Commun (Camb) 2016; 52:5534-7. [DOI: 10.1039/c6cc01214k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of an efficient precursor of the novel 1,7-naphthodiyne synthon is reported.
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Affiliation(s)
- Iago Pozo
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Universidade de Santiago de Compostela
- Spain
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
| | - Agustín Cobas
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
- Spain
| | - Diego Peña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Universidade de Santiago de Compostela
- Spain
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
| | - Enrique Guitián
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Universidade de Santiago de Compostela
- Spain
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
| | - Dolores Pérez
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)
- Universidade de Santiago de Compostela
- Spain
- Departamento de Química Orgánica
- Universidade de Santiago de Compostela
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30
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Rodríguez-Lojo D, Pérez D, Peña D, Guitián E. Large phenyl-substituted acenes by cycloaddition reactions of the 2,6-naphthodiyne synthon. Chem Commun (Camb) 2015; 51:5418-20. [PMID: 25621925 DOI: 10.1039/c5cc00205b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenyl-substituted tetra-, penta-, hexa- and octacenes were easily obtained starting from a readily available naphthalene-based bisaryne precursor. This approach to large acenes involves a sequence of two Diels-Alder cycloadditions with dienones followed by two CO extrusion reactions.
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Affiliation(s)
- Diego Rodríguez-Lojo
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782-Santiago de Compostela, Spain.
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31
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32
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Schuler B, Collazos S, Gross L, Meyer G, Pérez D, Guitián E, Peña D. From Perylene to a 22-Ring Aromatic Hydrocarbon in One-Pot. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403707] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Schuler B, Collazos S, Gross L, Meyer G, Pérez D, Guitián E, Peña D. From Perylene to a 22-Ring Aromatic Hydrocarbon in One-Pot. Angew Chem Int Ed Engl 2014; 53:9004-6. [DOI: 10.1002/anie.201403707] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/21/2014] [Indexed: 11/09/2022]
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34
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Guitián E, Peña D, Criado A, Cobas A, Pérez D, Vilas-Varela M. Acid-Promoted Aromatization of Perylene-Based Endoxides. HETEROCYCLES 2014. [DOI: 10.3987/com-13-s(s)115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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35
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Affiliation(s)
- Alejandro Criado
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
| | - Manuel Vilas-Varela
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
| | - Agustín Cobas
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
| | - Dolores Pérez
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
| | - Diego Peña
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
| | - Enrique Guitián
- Departamento de
Química
Orgánica and Centro de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS), Universidade de Santiago de Compostela, Santiago de Compostela 15782 Spain
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36
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Pérez D, Peña D, Guitián E. Aryne Cycloaddition Reactions in the Synthesis of Large Polycyclic Aromatic Compounds (Eur. J. Org. Chem. 27/2013). European J Org Chem 2013. [DOI: 10.1002/ejoc.201390076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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38
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Rodríguez-Lojo D, Pérez D, Peña D, Guitián E. One-pot synthesis of sterically congested large aromatic hydrocarbons via 1,4-diphenyl-2,3-triphenylyne. Chem Commun (Camb) 2013; 49:6274-6. [DOI: 10.1039/c3cc43103g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Abstract
We show that the different bond orders of individual carbon-carbon bonds in polycyclic aromatic hydrocarbons and fullerenes can be distinguished by noncontact atomic force microscopy (AFM) with a carbon monoxide (CO)-functionalized tip. We found two different contrast mechanisms, which were corroborated by density functional theory calculations: The greater electron density in bonds of higher bond order led to a stronger Pauli repulsion, which enhanced the brightness of these bonds in high-resolution AFM images. The apparent bond length in the AFM images decreased with increasing bond order because of tilting of the CO molecule at the tip apex.
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Affiliation(s)
- Leo Gross
- IBM Research-Zurich, CH-8803 Rüschlikon, Switzerland.
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40
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Affiliation(s)
- Diego Rodríguez-Lojo
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago, 15782 Santiago de Compostela, Spain
| | - Agustín Cobas
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago, 15782 Santiago de Compostela, Spain
| | - Diego Peña
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago, 15782 Santiago de Compostela, Spain
| | - Dolores Pérez
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago, 15782 Santiago de Compostela, Spain
| | - Enrique Guitián
- Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), and Departamento de Química Orgánica, Universidade de Santiago, 15782 Santiago de Compostela, Spain
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41
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Alonso JM, Díaz-Álvarez AE, Criado A, Pérez D, Peña D, Guitián E. Innentitelbild: [16]Cloverphene: a Clover-Shaped cata-Condensed Nanographene with Sixteen Fused Benzene Rings (Angew. Chem. 1/2012). Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107584] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Alonso JM, Díaz-Álvarez AE, Criado A, Pérez D, Peña D, Guitián E. Inside Cover: [16]Cloverphene: a Clover-Shaped cata-Condensed Nanographene with Sixteen Fused Benzene Rings (Angew. Chem. Int. Ed. 1/2012). Angew Chem Int Ed Engl 2011. [DOI: 10.1002/anie.201107584] [Citation(s) in RCA: 172] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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43
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Alonso JM, Díaz-Álvarez AE, Criado A, Pérez D, Peña D, Guitián E. [16]Cloverphene: a Clover-Shaped cata-Condensed Nanographene with Sixteen Fused Benzene Rings. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104935] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Alonso JM, Díaz-Álvarez AE, Criado A, Pérez D, Peña D, Guitián E. [16]Cloverphene: a Clover-Shaped cata-Condensed Nanographene with Sixteen Fused Benzene Rings. Angew Chem Int Ed Engl 2011; 51:173-7. [DOI: 10.1002/anie.201104935] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Indexed: 11/09/2022]
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Affiliation(s)
- Krzysztof Z. Ła̧czkowski
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Diego García
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Diego Peña
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Agustín Cobas
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Dolores Pérez
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Enrique Guitián
- Departamento de Química Orgánica and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Criado A, Peña D, Cobas A, Guitián E. Domino Diels-Alder Cycloadditions of Arynes: New Approach to Elusive Perylene Derivatives. Chemistry 2010; 16:9736-40. [DOI: 10.1002/chem.201001057] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Criado A, Gómez-Escalonilla MJ, Fierro JLG, Urbina A, Peña D, Guitián E, Langa F. Cycloaddition of benzyne to SWCNT: towards CNT-based paddle wheels. Chem Commun (Camb) 2010; 46:7028-30. [DOI: 10.1039/c0cc01907k] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rodríguez-Lojo D, Peña D, Pérez D, Guitián E. Aryne-mediated syntheses of structurally related acene derivatives. Org Biomol Chem 2010; 8:3386-8. [DOI: 10.1039/c003422n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Quintana I, Peña D, Pérez D, Guitián E. Generation and Reactivity of 1,2-Cyclohexadiene under Mild Reaction Conditions (Eur. J. Org. Chem. 32/2009). European J Org Chem 2009. [DOI: 10.1002/ejoc.200990090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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