1
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Bacaksiz C, Fyta M. Phthalocyanine Adsorbed on Monolayer CrI 3: Tailoring Their Magnetic Properties. ACS OMEGA 2024; 9:34589-34596. [PMID: 39157117 PMCID: PMC11325395 DOI: 10.1021/acsomega.4c02708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/28/2024] [Accepted: 07/08/2024] [Indexed: 08/20/2024]
Abstract
Metallo-phthalocyanines molecules, especially ironphthalocyanines (Fe-Pc), are often examined due to their rich chemical, magnetic, and optoelectronic features. Due to these, Fe-Pc molecules are promising for applications in gas sensors, field-effect transistors, organic LEDs, and data storage. Motivated by this potential, this study investigates Fe-Pc molecules adsorbed on a magnetic monolayer, CrI3. Using quantum-mechanical simulations, the aim of this work was to find pathways to selectively tune and engineer the magnetic and electronic properties of the molecules when they form hybrid complexes. The results quantitatively underline how adsorption alters the magnetic properties of the Fe-Pc molecules. Interestingly, the analysis points to changes in the molecular magnetic anisotropy when comparing the magnetic moment of the isolated molecule to that of the molecule/monolayer complex formed after adsorption. The presence of iodine vacancies was shown to enhance the magnetic interactions between the iron of the Fe-Pc molecule and the chromium of the monolayer. Our findings suggest ways to control oxygen capture-release properties through material choice and defect creation. Insights into the stability and charge density depletion on the molecule provide critical information for selective tuning of the magnetic properties and engineering of the functionalities of these molecule/material complexes.
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Affiliation(s)
- Cihan Bacaksiz
- Department of Physics & NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
- Computational Biotechnology, RWTH Aachen University, Worringerweg 3, 70574 Aachen, Germany
| | - Maria Fyta
- Computational Biotechnology, RWTH Aachen University, Worringerweg 3, 70574 Aachen, Germany
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2
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Gao Y, Vlaic S, Gorni T, De' Medici L, Clair S, Roditchev D, Pons S. Manipulation of the Magnetic State of a Porphyrin-Based Molecule on Gold: From Kondo to Quantum Nanomagnet via the Charge Fluctuation Regime. ACS NANO 2023; 17:9082-9089. [PMID: 37162317 DOI: 10.1021/acsnano.2c12223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
By moving individual Fe-porphyrin-based molecules with the tip of a scanning tunneling microscope in the vicinity of the elbow of the herringbone-reconstructed Au(111) containing a Br atom, we reversibly and continuously control their magnetic state. Several regimes are obtained experimentally and explored theoretically: from the integer spin limit, through intermediate magnetic states with renormalized magnetic anisotropy, until the Kondo-screened regime, corresponding to a progressive increase of charge fluctuations and mixed valency due to an increase in the interaction of the molecular Fe states with the substrate Fermi sea. Our study demonstrates the potential of utilizing charge fluctuations to generate and tune quantum magnetic states in molecule-surface hybrids.
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Affiliation(s)
- Yingzheng Gao
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
| | - Sergio Vlaic
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
| | - Tommaso Gorni
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
| | - Luca De' Medici
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
| | - Sylvain Clair
- Aix Marseille University, CNRS, IM2NP, 13397 Marseille, France
| | - Dimitri Roditchev
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
- Institut des Nanosciences de Paris, Sorbonne Université, CNRS UMR7588, 75005 Paris, France
| | - Stéphane Pons
- Laboratoire de Physique et d'Étude des Matériaux (LPEM), ESPCI Paris, PSL Research University, CNRS UMR8213, Sorbonne Université, 75005 Paris, France
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3
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She L, Shen Z, Xie Z, Wang L, Song Y, Wang XS, Jia Y, Zhang Z, Zhang W. Magnetic Moment Preservation and Emergent Kondo Resonance of Co-Phthalocyanine on Semimetallic Sb(111). PHYSICAL REVIEW LETTERS 2022; 129:026802. [PMID: 35867437 DOI: 10.1103/physrevlett.129.026802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 03/28/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
Magnetic molecules on surfaces have been widely investigated to reveal delicate interfacial couplings and for potential technological applications. In these endeavors, one prevailing challenge is how to preserve or recover the molecular spins, especially on highly metallic substrates that can readily quench the magnetic moments of the admolecules. Here, we use scanning tunneling microscopy and spectroscopy to exploit the semimetallic nature of antimony and observe, surprisingly yet pleasantly, that the spin of Co-phthalocyanine is well preserved on Sb(111), as unambiguously evidenced by the emergent strong Kondo resonance across the molecule. Our first-principles calculations further confirm that the optimal density of states near the Fermi level of the semimetal is a decisive factor, weakening the overall interfacial coupling, while still ensuring sufficiently effective electron-spin scattering in the many-body system. Beyond isolated admolecules, we discover that each of the magnetic moments in a molecular dimer or a densely packed island is distinctly preserved as well, rendering such molecular magnets immense potentials for ultrahigh density memory devices.
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Affiliation(s)
- Limin She
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
| | - Zhitao Shen
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
| | - Zhenyang Xie
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
| | - Limei Wang
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
| | - Yeheng Song
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
| | - Xue-Sen Wang
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
- Department of Physics, National University of Singapore, 117542, Singapore
| | - Yu Jia
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
- International Laboratory for Quantum Functional Materials of Henan, Zhengzhou University, Zhengzhou 450003, China
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, China
| | - Zhenyu Zhang
- International Center for Quantum Design of Functional Materials (ICQD), University of Science and Technology of China, Hefei 230026, China
| | - Weifeng Zhang
- Key Laboratory for Quantum Matters, and Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
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4
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Shahed SM, Ara F, Hossain MI, Katoh K, Yamashita M, Komeda T. Observation of Yu-Shiba-Rusinov States and Inelastic Tunneling Spectroscopy for Intramolecule Magnetic Exchange Interaction Energy of Terbium Phthalocyanine (TbPc) Species Adsorbed on Superconductor NbSe 2. ACS NANO 2022; 16:7651-7661. [PMID: 35467334 PMCID: PMC9134493 DOI: 10.1021/acsnano.1c11221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 04/21/2022] [Indexed: 06/14/2023]
Abstract
We investigated the spin properties of the terbium phthalocyanine (TbPc) species adsorbed on the superconductor NbSe2 surface using scanning tunneling microscopy and spectroscopy. TbPc2 is a molecule in a class of single-molecule magnets (SMMs), and the use of superconductor electrodes attracts attention for the application to the devices using the spin degree of freedom. TbPc is a building block of TbPc2 and can reveal the spin component's behavior. In the experiment, TbPc species were placed on the surface of the superconductor NbSe2. We measured Yu-Shiba-Rusinov (YSR) states caused by the interaction between the superconducting state and magnetic impurity and inelastic tunneling spectroscopy (IETS) for the spin excitation, below 1 K. We also measured the Kondo state formed by the magnetic singlet formation. We detected the radical spin at the ligand position of the TbPc by the presence of the Kondo peak and demonstrated that the radical spin forms the YSR feature. In addition, the exchange interaction energy (Eex) between the spins of the radical ligand (Pc) and the center 4f metal atom (Tb3+) is determined by using the IETS technique. Eex is a critical parameter that determines the blocking temperature, below which the sample behaves as an SMM. IETS results show that the statistical distribution of Eex has peaked at 1.3, 1.6, and 1.9 meV. The energy range is comparable to the recent theoretical calculation result. In addition, we show that the energy variation is correlated with the bonding configuration of TbPc.
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Affiliation(s)
- Syed Mohammad
Fakruddin Shahed
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Ferdous Ara
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Mohammad Ikram Hossain
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
| | - Keiichi Katoh
- Department
of Chemistry, Graduate School of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan
| | - Masahiro Yamashita
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- School
of Materials Science and Engineering, Nankai
University, Tianjin 300350, China
| | - Tadahiro Komeda
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 9800877, Japan
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5
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Tao L, Zhang Y, Du S. Structures and electronic properties of functional molecules on metal substrates: From single molecule to self‐assemblies. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2021. [DOI: 10.1002/wcms.1591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Lei Tao
- Institute of Physics and University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing China
| | - Yu‐yang Zhang
- Institute of Physics and University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing China
- CAS Center for Excellence in Topological Quantum Computation Beijing China
| | - Shixuan Du
- Institute of Physics and University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing China
- CAS Center for Excellence in Topological Quantum Computation Beijing China
- Beijing National Laboratory for Condensed Matter Physics Beijing China
- Songshan Lake Materials Laboratory Dongguan China
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6
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Wang Y, Hou J, Eguchi K, Nanjo C, Takaoka T, Sainoo Y, Awaga K, Komeda T. Structural, Electronic, and Magnetic Properties of Cobalt Tetrakis (Thiadiazole) Porphyrazine Molecule Films on Au(111). ACS OMEGA 2020; 5:6676-6683. [PMID: 32258903 PMCID: PMC7114880 DOI: 10.1021/acsomega.9b04453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 03/05/2020] [Indexed: 06/11/2023]
Abstract
We investigated the structural and electronic/spin configurations of a film of the Co tetrakis(1,2,5-thiadiazole) porphyrazine (CoTTDPz) molecule adsorbed on the Au(111) surface by a scanning tunneling microscope (STM). CoTTDPz has a structure similar to that of the Co phthalocyanine molecule, but the benzene ring of the isoindole of the phthalocyanine molecule is replaced by the pentagon moiety of 1,2,5-thiadiazoles that has an S atom at the apex. We find an ordered molecular lattice with a threefold symmetry where a nearest-neighbor distance of 1.30 nm was measured, which is significantly smaller than that observed for the metal Pc molecule. The unit cell of the lattice contains two molecules that are rotated by 60° relative to each other. With the configuration achieved by this rotation, the neighboring molecules can form a stronger interaction through bonding between the S atom at the apex of one molecule and the N atom of the other (the N atom that is bridging the thiadiazoles). The strong interaction between the molecule and the substrate appears in the spin state examined by the detection of the Kondo resonance, which is formed by the screening of an isolated spin by the conduction electron. Even though the existence of the spin was confirmed for the bulk and thick films of this molecule, no Kondo features are detected for the molecules in the first, second, and third layers of the films. However, the isolated molecule in the third layer showed an intriguing combination of the Kondo feature and an inelastic excitation feature caused by a spin-flip process.
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Affiliation(s)
- Yu Wang
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
| | - Jie Hou
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
| | - Keitaro Eguchi
- Department
of Chemistry & Research Center for Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Chihiro Nanjo
- Department
of Chemistry & Research Center for Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Tsuyoshi Takaoka
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
| | - Yasuyuki Sainoo
- Department
of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
| | - Kunio Awaga
- Department
of Chemistry & Research Center for Materials Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan
| | - Tadahiro Komeda
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877, Japan
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7
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Quinn T, Choudhury P. Direct oxidation of methane to methanol on single-site copper-oxo species of copper porphyrin functionalized graphene: A DFT study. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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8
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Katoh K, Komeda T, Yamashita M. The Frontier of Molecular Spintronics Based on Multiple-Decker Phthalocyaninato TbIIISingle-Molecule Magnets. CHEM REC 2016; 16:987-1016. [DOI: 10.1002/tcr.201500290] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Keiichi Katoh
- Department of Chemistry Graduate School of Science; Tohoku University; 6-3, Aramaki-Aza-Aoba Aoba-Ku Sendai 980-8578 Japan
| | - Tadahiro Komeda
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen)Tohoku University; 22-1-1, Katahira Aoba-Ku Sendai 980-0877 (Japan)E-mail: Additional Supporting Information may be found in the online version of this article
| | - Masahiro Yamashita
- Department of Chemistry Graduate School of Science; Tohoku University; 6-3, Aramaki-Aza-Aoba Aoba-Ku Sendai 980-8578 Japan
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9
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Ara F, Qi ZK, Hou J, Komeda T, Katoh K, Yamashita M. A scanning tunneling microscopy study of the electronic and spin states of bis(phthalocyaninato)terbium(iii) (TbPc2) molecules on Ag(111). Dalton Trans 2016; 45:16644-16652. [DOI: 10.1039/c6dt01967f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, we investigate a single molecule magnet bis(phthalocyaninato)terbium(iii) (TbPc2) molecule film by using low temperature STM.
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Affiliation(s)
- Ferdous Ara
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Zhi Kun Qi
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Jie Hou
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Tadahiro Komeda
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM
- Tagen)
- Tohoku University
- Sendai 980-0877
- Japan
| | - Keiichi Katoh
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Yamashita
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
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10
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Iancu V, Schouteden K, Li Z, Van Haesendonck C. Electron–phonon coupling in engineered magnetic molecules. Chem Commun (Camb) 2016; 52:11359-11362. [DOI: 10.1039/c6cc03847f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We probe electron–phonon coupling in CoTPyP and CrTPyP synthesized magnetic molecules. Low temperatures STS reveals pronounced Kondo resonances at zero bias in both molecules and additional Kondo resonance replicas observed at higher voltages in vibrating CoTPyP molecules.
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Affiliation(s)
- Violeta Iancu
- Laboratory of Solid-State Physics and Magnetism
- KU Leuven
- BE-3001 Leuven
- Belgium
- Extreme Light Infrastructure – Nuclear Physics/Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering
| | - Koen Schouteden
- Laboratory of Solid-State Physics and Magnetism
- KU Leuven
- BE-3001 Leuven
- Belgium
| | - Zhe Li
- Laboratory of Solid-State Physics and Magnetism
- KU Leuven
- BE-3001 Leuven
- Belgium
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11
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Zhong JQ, Wang Z, Zhang JL, Wright CA, Yuan K, Gu C, Tadich A, Qi D, Li HX, Lai M, Wu K, Xu GQ, Hu W, Li Z, Chen W. Reversible Tuning of Interfacial and Intramolecular Charge Transfer in Individual MnPc Molecules. NANO LETTERS 2015; 15:8091-8098. [PMID: 26528623 DOI: 10.1021/acs.nanolett.5b03520] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The reversible selective hydrogenation and dehydrogenation of individual manganese phthalocyanine (MnPc) molecules has been investigated using photoelectron spectroscopy (PES), low-temperature scanning tunneling microscopy (LT-STM), synchrotron-based near edge X-ray absorption fine structure (NEXAFS) measurements, and supported by density functional theory (DFT) calculations. It is shown conclusively that interfacial and intramolecular charge transfer arises during the hydrogenation process. The electronic energetics upon hydrogenation is identified, enabling a greater understanding of interfacial and intramolecular charge transportation in the field of single-molecule electronics.
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Affiliation(s)
- Jian-Qiang Zhong
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology , Nanjing, Jiangsu 210044, China
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
- Department of Physics, National University of Singapore , 2 Science Drive 3, 117542, Singapore
| | - Zhunzhun Wang
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China , Hefei 230026, China
- Guizhou Provincial Key Laboratory of Computational Nanomaterial Science, Guizhou Normal College , Guiyang 550018, China
| | - Jia Lin Zhang
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
- Department of Physics, National University of Singapore , 2 Science Drive 3, 117542, Singapore
| | - Christopher A Wright
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University , Melbourne, Victoria 3086, Australia
| | - Kaidi Yuan
- Department of Physics, National University of Singapore , 2 Science Drive 3, 117542, Singapore
| | - Chengding Gu
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
| | - Anton Tadich
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University , Melbourne, Victoria 3086, Australia
- Australian Synchrotron , 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Dongchen Qi
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University , Melbourne, Victoria 3086, Australia
| | - He Xing Li
- Chinese Education Ministry Key Laboratory of Resource Chemistry, Shanghai Normal University , Shanghai 200234, China
| | - Min Lai
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology , Nanjing, Jiangsu 210044, China
| | - Kai Wu
- College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, China
- Singapore-Peking University Research Center for a Sustainable Low-Carbon Future , 1 CREAT Way, #15-01, CREAT Tower, 138602, Singapore
| | - Guo Qin Xu
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
- Singapore-Peking University Research Center for a Sustainable Low-Carbon Future , 1 CREAT Way, #15-01, CREAT Tower, 138602, Singapore
- National University of Singapore (Suzhou) Research Institute , 377 Lin Quan Street, Suzhou Industrial Park, Jiangsu 215123, China
| | - Wenping Hu
- Department of Chemistry, School of Science, Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, China
| | - Zhenyu Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China , Hefei 230026, China
| | - Wei Chen
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
- Department of Physics, National University of Singapore , 2 Science Drive 3, 117542, Singapore
- Singapore-Peking University Research Center for a Sustainable Low-Carbon Future , 1 CREAT Way, #15-01, CREAT Tower, 138602, Singapore
- National University of Singapore (Suzhou) Research Institute , 377 Lin Quan Street, Suzhou Industrial Park, Jiangsu 215123, China
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12
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Antczak G, Kamiński W, Sabik A, Zaum C, Morgenstern K. Complex Surface Diffusion Mechanisms of Cobalt Phthalocyanine Molecules on Ag(100). J Am Chem Soc 2015; 137:14920-9. [PMID: 26584143 DOI: 10.1021/jacs.5b08001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We used time-lapsed scanning tunneling microscopy between 43 and 50 K and density functional theory (DFT) to explore the basic surface diffusion steps of cobalt phthalocyanine (CoPc) molecules on the Ag(100) surface. We show that the CoPc molecules translate and rotate on the surface in the same temperature range. Both processes are associated with similar activation energies; however, the translation is more frequently observed. Our DFT calculations provide the activation energies for the translation of the CoPc molecule between the nearest hollow sites and the rotation at both the hollow and the bridge sites. The activation energies are only consistent with the experimental findings, if the surface diffusion mechanism involves a combined translational and rotational molecular motion. Additionally, two channels of motion are identified: the first provides only a channel for translation, while the second provides a channel for both the translation and the rotation. The existence of the two channels explains a higher rate for the translation determined in experiment.
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Affiliation(s)
- Grażyna Antczak
- Institute of Experimental Physics, University of Wrocław , Wrocław, Poland
| | - Wojciech Kamiński
- Institute of Experimental Physics, University of Wrocław , Wrocław, Poland
| | - Agata Sabik
- Institute of Experimental Physics, University of Wrocław , Wrocław, Poland
| | | | - Karina Morgenstern
- Chair for Physical Chemistry I, Ruhr-Universität Bochum , Bochum, Germany
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13
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14
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Liu J, Isshiki H, Katoh K, Morita T, Breedlove BK, Yamashita M, Komeda T. First Observation of a Kondo Resonance for a Stable Neutral Pure Organic Radical, 1,3,5-Triphenyl-6-oxoverdazyl, Adsorbed on the Au(111) Surface. J Am Chem Soc 2012; 135:651-8. [DOI: 10.1021/ja303510g] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Liu
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Hironari Isshiki
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Keiichi Katoh
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
| | - Takaumi Morita
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Brian, K. Breedlove
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Masahiro Yamashita
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
| | - Tadahiro Komeda
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
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15
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Schramm A, Stroh C, Dössel K, Lukas M, Fischer M, Schramm F, Fuhr O, Löhneysen HV, Mayor M. Tripodal MIIIComplexes on Au(111) Surfaces: Towards Molecular “Lunar Modules”. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200928] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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She L, Yu Y, Wu P, Zhang Y, Qin Z, Huang M, Cao G. Structures and orientations of cobalt phthalocyanine adsorbed on Sb(111). J Chem Phys 2012; 136:144707. [PMID: 22502543 DOI: 10.1063/1.3702784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structures and orientations of cobalt phthalocyanine (CoPc) adsorbed on Sb(111) were investigated by low-temperature scanning tunneling microscope. We found that at the initial coverage molecular domains formed both on the terraces and at the vicinity of step edges that were saturated by molecular chains in advance. With the increasing of molecular coverage, the alternately arranged molecular rows of CoPc adsorbed on the bridge sites of Sb(111) and the orientations of them were rotated by 14° ± 2° with respect to the [-101] direction. At the coverage above one monolayer, the molecules of the second layer were assembled along the directions of the underlying molecular rows and showed similar configurations. Consequently, the second-layer CoPc molecules interacted with neighboring molecules via π orbitals, resulting in the observation of overlapped molecular orbitals.
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Affiliation(s)
- Limin She
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
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17
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Li B, Li Z, Yang J, Hou JG. STM studies of single molecules: molecular orbital aspects. Chem Commun (Camb) 2011; 47:2747-62. [DOI: 10.1039/c0cc03021j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Perera UGE, Kulik HJ, Iancu V, Dias da Silva LGGV, Ulloa SE, Marzari N, Hla SW. Spatially extended Kondo state in magnetic molecules induced by interfacial charge transfer. PHYSICAL REVIEW LETTERS 2010; 105:106601. [PMID: 20867535 DOI: 10.1103/physrevlett.105.106601] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2010] [Indexed: 05/29/2023]
Abstract
An extensive redistribution of spin density in TBrPP-Co molecules adsorbed on a Cu(111) surface is investigated by monitoring Kondo resonances at different locations on single molecules. Remarkably, the width of the Kondo resonance is found to be much larger on the organic ligands than on the central cobalt atom-reflecting enhanced spin-electron interactions on molecular orbitals. This unusual effect is explained by means of first-principles and numerical renormalization-group calculations highlighting the possibility to engineer spin polarization by exploiting interfacial charge transfer.
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Affiliation(s)
- U G E Perera
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
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19
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Guo Q, Qin Z, Zang K, Liu C, Yu Y, Cao G. Coverage-dependent structures of cobalt-phthalocyanine molecules adsorbed on Cu(001) surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11804-11808. [PMID: 20560560 DOI: 10.1021/la1019907] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The morphologies, self-assembly structures, and stability of cobalt-phthalocyanines (CoPc) molecules adsorbed on Cu(001) with coverage ranging from 0.2 monolayer (ML) to 1.6 ML are investigated by ultrahigh-vacuum low-temperature scanning tunneling microscopy (UHV LT-STM) at liquid nitrogen temperature. Upon increasing the deposition of CoPc molecules various structures, such as isolated adsorption, quasi-hexagonal structure, square root(29) x square root(29) structure, are well characterized by the corresponding high-resolution STM images. The CoPc-CoPc intermolecular interaction and CoPc-substrate interfacial interaction dominate the structural evolutions. For the coverage higher than 1 ML, CoPc molecules preferentially locate on top of the molecules underneath and organize into square root(58) x square root(58) structure. As more and more CoPc molecules adsorb on the first layer, in some square root(58) x square root(58) regions molecular insertion leads to the formation of the square root(29) x square root(29) domain to effectively decrease the energy of the whole system.
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Affiliation(s)
- Qinmin Guo
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, PR China
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20
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Li Z, Li B, Yang J, Hou JG. Single-molecule chemistry of metal phthalocyanine on noble metal surfaces. Acc Chem Res 2010; 43:954-62. [PMID: 20359193 DOI: 10.1021/ar9001558] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To develop new functional materials and nanoscale electronics, researchers would like to accurately describe and precisely control the quantum state of a single molecule on a surface. Scanning tunneling microscopy (STM), combined with first-principles simulations, provides a powerful technique for acquiring this level of understanding. Traditionally, metal phthalocyanine (MPc) molecules, composed of a metal atom surrounded by a ligand ring, have been used as dyes and pigments. Recently, MPc molecules have shown great promise as components of light-emitting diodes, field-effect transistors, photovoltaic cells, and single-molecule devices. In this Account, we describe recent research on the characterization and control of adsorption and electronic states of a single MPc molecule on noble metal surfaces. In general, the electronic and magnetic properties of a MPc molecule largely depend on the type of metal ion within the phthalocyanine ligand and the type of surface on which the molecule is adsorbed. However, with the STM technique, we can use on-site molecular "surgery" to manipulate the structure and the properties of the molecule. For example, STM can induce a dehydrogenation reaction of the MPc, which allows us to control the Kondo effect, which describes the spin polarization of the molecule and its interaction with the complex environment. A specially designed STM tip can allow researchers to detect certain molecule-surface hybrid states that are not accessible by other techniques. By matching the local orbital symmetry of the STM tip and the molecule, we can generate the negative differential resistance effect in the formed molecular junction. This orbital symmetry based mechanism is extremely robust and does not critically depend on the geometry of the STM tip. In summary, this simple model system, a MPc molecule absorbed on a noble metal surface, demonstrates the power of STM for quantum characterization and manipulation of single molecules, highlighting the potential of this technique in a variety of applications.
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Affiliation(s)
- Zhenyu Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bin Li
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jian Guo Hou
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
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21
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Katoh K, Komeda T, Yamashita M. Surface morphologies, electronic structures, and Kondo effect of lanthanide(iii)-phthalocyanine molecules on Au(111) by using STM, STS and FET properties for next generation devices. Dalton Trans 2010; 39:4708-23. [DOI: 10.1039/b926121d] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Katoh K, Yoshida Y, Yamashita M, Miyasaka H, Breedlove BK, Kajiwara T, Takaishi S, Ishikawa N, Isshiki H, Zhang YF, Komeda T, Yamagishi M, Takeya J. Direct observation of lanthanide(III)-phthalocyanine molecules on Au(111) by using scanning tunneling microscopy and scanning tunneling spectroscopy and thin-film field-effect transistor properties of Tb(III)- and Dy(III)-phthalocyanine molecules. J Am Chem Soc 2009; 131:9967-76. [PMID: 19569681 DOI: 10.1021/ja902349t] [Citation(s) in RCA: 197] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The crystal structures of double-decker single molecule magnets (SMM) LnPc(2) (Ln = Tb(III) and Dy(III); Pc = phthalocyanine) and non-SMM YPc(2) were determined by using X-ray diffraction analysis. The compounds are isomorphous to each other. The compounds have metal centers (M = Tb(3+), Dy(3+), and Y(3+)) sandwiched by two Pc ligands via eight isoindole-nitrogen atoms in a square-antiprism fashion. The twist angle between the two Pc ligands is 41.4 degrees. Scanning tunneling microscopy was used to investigate the compounds adsorbed on a Au(111) surface, deposited by using the thermal evaporation in ultrahigh vacuum. Both MPc(2) with eight lobes and MPc with four lobes, which has lost one Pc ligand, were observed. In the scanning tunneling spectroscopy images of TbPc molecules at 4.8 K, a Kondo peak with a Kondo temperature (T(K)) of approximately 250 K was observed near the Fermi level (V = 0 V). On the other hand, DyPc, YPc, and MPc(2) exhibited no Kondo peak. To understand the observed Kondo effect, the energy splitting of sublevels in a crystal field should be taken into consideration. As the next step in our studies on the SMM/Kondo effect in Tb-Pc derivatives, we investigated the electronic transport properties of Ln-Pc molecules as the active layer in top- and bottom-contact thin-film organic field effect transistor devices. Tb-Pc molecule devices exhibit p-type semiconducting properties with a hole mobility (mu(H)) of approximately 10(-4) cm(2) V(-1) s(-1). Interestingly, the Dy-Pc based devices exhibited ambipolar semiconducting properties with an electron mobility (mu(e)) of approximately 10(-5) and a mu(H) of approximately 10(-4) cm(2) V(-1) s(-1). This behavior has important implications for the electronic structure of the molecules.
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Affiliation(s)
- Keiichi Katoh
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
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