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Bhagwandin DD, Page KA, Tran LD, Yao Y, Reidell A, Muratore C, Fang Q, Ruditskiy A, Hampton CM, Kennedy WJ, Drummy LF, Zhong Y, Marks TJ, Facchetti A, Lou J, Koerner H, Baldwin LA, Glavin NR. Orientation and morphology control in acid-catalyzed covalent organic framework thin films. Nanoscale 2024; 16:8369-8377. [PMID: 38572999 DOI: 10.1039/d3nr05798d] [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] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
As thin films of semiconducting covalent organic frameworks (COFs) are demonstrating utility for ambipolar electronics, channel materials in organic electrochemical transistors (OECTs), and broadband photodetectors, control and modulation of their thin film properties is paramount. In this work, an interfacial growth technique is utilized to synthesize imine TAPB-PDA COF films at both the liquid-liquid interface as well as at the liquid-solid interface on a Si/SiO2 substrate. The concentration of acetic acid catalyst in the aqueous phase is shown to significantly influence the thin film morphology of the liquid-solid growth, with concentrations below 1 M resulting in no film nucleation, concentrations of 1-4 M enabling smooth film formation, and concentrations greater than 4 M resulting in films with a higher density of particulates on the surface. Importantly, while the films grown at the liquid-liquid interface are mixed-orientation, those grown directly at the liquid-solid interface on the Si/SiO2 surface have highly oriented COF layers aligned parallel to the substrate surface. Moreover, this liquid-solid growth process affords TAPB-PDA COF thin films with p-type charge transport having a transconductance of 10 μS at a gate voltage of -0.9 V in an OECT device structure.
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Affiliation(s)
- Dayanni D Bhagwandin
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
| | - Kirt A Page
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, USA
| | - Ly D Tran
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
| | - Yao Yao
- Department of Chemistry and the Materials Research Center, Northwestern University, Sheridan Road, Evanston, IL 60208, USA
| | - Alexander Reidell
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
| | - Christopher Muratore
- Department of Chemical and Materials Engineering, University of Dayton, Dayton, Ohio 45469, USA
| | - Qiyi Fang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Aleksey Ruditskiy
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
| | - Cheri M Hampton
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
- UES, Inc., Beavercreek, Ohio 45432, USA
| | - W Joshua Kennedy
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
| | - Lawrence F Drummy
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
| | - Yu Zhong
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA
| | - Tobin J Marks
- Department of Chemistry and the Materials Research Center, Northwestern University, Sheridan Road, Evanston, IL 60208, USA
| | - Antonio Facchetti
- Department of Chemistry and the Materials Research Center, Northwestern University, Sheridan Road, Evanston, IL 60208, USA
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - Jun Lou
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, USA
| | - Hilmar Koerner
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
| | - Luke A Baldwin
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
| | - Nicholas R Glavin
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, USA.
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Zhao C, Bhagwandin DD, Xu W, Ruffieux P, Khan SI, Pignedoli CA, Fasel R, Rubin Y. Dramatic Acceleration of the Hopf Cyclization on Gold(111): From Enediynes to Peri-Fused Diindenochrysene Graphene Nanoribbons. J Am Chem Soc 2024; 146:2474-2483. [PMID: 38227949 PMCID: PMC10835731 DOI: 10.1021/jacs.3c10144] [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: 01/18/2024]
Abstract
Hopf et al. reported the high-temperature 6π-electrocyclization of cis-hexa-1,3-diene-5-yne to benzene in 1969. Subsequent studies using this cyclization have been limited by its very high reaction barrier. Here, we show that the reaction barrier for two model systems, (E)-1,3,4,6-tetraphenyl-3-hexene-1,5-diyne (1a) and (E)-3,4-bis(4-iodophenyl)-1,6-diphenyl-3-hexene-1,5-diyne (1b), is decreased by nearly half on a Au(111) surface. We have used scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc-AFM) to monitor the Hopf cyclization of enediynes 1a,b on Au(111). Enediyne 1a undergoes two sequential, quantitative Hopf cyclizations, first to naphthalene derivative 2, and finally to chrysene 3. Density functional theory (DFT) calculations reveal that a gold atom from the Au(111) surface is involved in all steps of this reaction and that it is crucial to lowering the reaction barrier. Our findings have important implications for the synthesis of novel graphene nanoribbons. Ullmann-like coupling of enediyne 1b at 20 °C on Au(111), followed by a series of Hopf cyclizations and aromatization reactions at higher temperatures, produces nanoribbons 12 and 13. These results show for the first time that graphene nanoribbons can be synthesized on a Au(111) surface using the Hopf cyclization mechanism.
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Affiliation(s)
- Chenxiao Zhao
- Nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Dayanni D Bhagwandin
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles Young Dr. East, Los Angeles, California 90095-1567, United States
| | - Wangwei Xu
- Nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Pascal Ruffieux
- Nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Saeed I Khan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles Young Dr. East, Los Angeles, California 90095-1567, United States
| | - Carlo A Pignedoli
- Nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Roman Fasel
- Nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Yves Rubin
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles Young Dr. East, Los Angeles, California 90095-1567, United States
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