1
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Chang X, Arnold ME, Blinder R, Zolg J, Wischnat J, van Slageren J, Jelezko F, Kuehne AJC, von Delius M. A Stable Chichibabin Diradicaloid with Near-Infrared Emission. Angew Chem Int Ed Engl 2024; 63:e202404853. [PMID: 38695271 DOI: 10.1002/anie.202404853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Indexed: 06/21/2024]
Abstract
Conjugated molecules with multiple radical centers such as the iconic Chichibabin diradicaloid hold promise as building blocks in materials for quantum sensing and quantum information processing. However, it is a considerable challenge to design simple analogues of the Chichibabin hydrocarbon that are chemically inert, exhibit high diradical character and emit light at a distinct wavelength that may offer an optical readout of the spin state in functional ensembles. Here we describe the serendipitous discovery of the stable TTM-TTM diradicaloid, which exhibits high diradical character, a striking sky-blue color and near-infrared (NIR) emission (in solution). This combination of properties is unique among related diradicaloids and is due to the presence of hydrogen and chlorine atoms in "just the right positions", allowing a perfectly planar, yet predominantly benzenoid bridge to connect the two sterically stabilized radical centers. In-depth studies of the optical and magnetic properties suggest that this structural motif could become a mainstay building block of organic spin materials.
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Affiliation(s)
- Xingmao Chang
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Mona E Arnold
- Institute of Macromolecular and Organic Chemistry and Center for Integrated Quantum Science and Technology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Rémi Blinder
- Institute of Quantum Optics and Center for Integrated Quantum Science and Technology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Julia Zolg
- Institute of Macromolecular and Organic Chemistry and Center for Integrated Quantum Science and Technology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Jonathan Wischnat
- Institut für Physikalische Chemie and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Fedor Jelezko
- Institute of Quantum Optics and Center for Integrated Quantum Science and Technology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Alexander J C Kuehne
- Institute of Macromolecular and Organic Chemistry and Center for Integrated Quantum Science and Technology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Max von Delius
- Institute of Organic Chemistry, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
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2
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Yang C, Chen Z, Yu C, Cao J, Ke G, Zhu W, Liang W, Huang J, Cai W, Saha C, Sabuj MA, Rai N, Li X, Yang J, Li Y, Huang F, Guo X. Regulation of quantum spin conversions in a single molecular radical. NATURE NANOTECHNOLOGY 2024; 19:978-985. [PMID: 38448520 DOI: 10.1038/s41565-024-01632-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 02/13/2024] [Indexed: 03/08/2024]
Abstract
Free radicals, generally formed through the cleavage of covalent electron-pair bonds, play an important role in diverse fields ranging from synthetic chemistry to spintronics and nonlinear optics. However, the characterization and regulation of the radical state at a single-molecule level face formidable challenges. Here we present the detection and sophisticated tuning of the open-shell character of individual diradicals with a donor-acceptor structure via a sensitive single-molecule electrical approach. The radical is sandwiched between nanogapped graphene electrodes via covalent amide bonds to construct stable graphene-molecule-graphene single-molecule junctions. We measure the electrical conductance as a function of temperature and track the evolution of the closed-shell and open-shell electronic structures in real time, the open-shell triplet state being stabilized with increasing temperature. Furthermore, we tune the spin states by external stimuli, such as electrical and magnetic fields, and extract thermodynamic and kinetic parameters of the transition between closed-shell and open-shell states. Our findings provide insights into the evolution of single-molecule radicals under external stimuli, which may proof instrumental for the development of functional quantum spin-based molecular devices.
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Affiliation(s)
- Caiyao Yang
- Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Centre, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China
- School of Materials Science and Engineering, Peking University, Beijing, P. R. China
| | - Zhongxin Chen
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Cuiju Yu
- Department of Chemical Physics, University of Science and Technology of China, Hefei, P. R. China
| | - Jiawen Cao
- Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Centre, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China
| | - Guojun Ke
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Weiya Zhu
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Weixuan Liang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Jiaxing Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Wanqing Cai
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China
| | - Chinmoy Saha
- Dave C. Swalm School of Chemical Engineering and Centre for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS, USA
| | - Md Abdus Sabuj
- Dave C. Swalm School of Chemical Engineering and Centre for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS, USA
| | - Neeraj Rai
- Dave C. Swalm School of Chemical Engineering and Centre for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS, USA
| | - Xingxing Li
- Department of Chemical Physics, University of Science and Technology of China, Hefei, P. R. China.
| | - Jinlong Yang
- Department of Chemical Physics, University of Science and Technology of China, Hefei, P. R. China
| | - Yuan Li
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China.
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, P. R. China.
| | - Xuefeng Guo
- Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Centre, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China.
- Centre of Single-Molecule Sciences, Institute of Modern Optics, Frontiers Science Centre for New Organic Matter, Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, College of Electronic Information and Optical Engineering, Nankai University, Tianjin, P. R. China.
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3
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Maity A, Mishra VK, Dolai S, Mishra S, Patra SK. Design, Synthesis, and Characterization of Organometallic BODIPY-Ru(II) Dyads: Redox and Photophysical Properties with Singlet Oxygen Generation Capability†. Inorg Chem 2024; 63:4839-4854. [PMID: 38433436 DOI: 10.1021/acs.inorgchem.3c03610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
A series of Ru(II)-acetylide complexes (Ru1, Ru2, and Ru1m) with alkynyl-functionalized borondipyrromethene (BODIPY) conjugates were designed by varying the position of the linker that connects the BODIPY unit to the Ru(II) metal center through acetylide linkage at either the 2-(Ru1) and 2,6-(Ru2) or the meso-phenyl (Ru1m) position of the BODIPY scaffold. The Ru(II) organometallic complexes were characterized by various spectroscopic methods, including nuclear magnetic resonance (NMR) spectroscopy, infrared (IR) spectroscopy, CHN, and high-resolution mass spectrometry (HRMS) analyses. The Ru(II)-BODIPY conjugates exhibit fascinating electrochemical and photophysical properties. All BODIPY-Ru(II) complexes exhibit strong absorption (εmax = 29,000-72,000 M-1 cm-1) in the visible region (λmax = 502-709 nm). Fluorescence is almost quenched for Ru1 and Ru2, whereas Ru1m shows the residual fluorescence of the corresponding BODIPY core at 517 nm. The application of the BODIPY-Ru(II) dyads as nonporphyrin-based triplet photosensitizers was explored by a method involving the singlet oxygen (1O2)-mediated photo-oxidation of diphenylisobenzofuran. Effective π-conjugation between the BODIPY chromophore and Ru(II) center in the case of Ru1 and Ru2 was found to be necessary to improve intersystem crossing (ISC) and hence the 1O2-sensitizing ability. In addition, electrochemical studies indicate electronic interplay between the metal center and the redox-active BODIPY in the BODIPY-Ru(II) dyads.
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Affiliation(s)
- Apurba Maity
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Vipin Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Suman Dolai
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Sanjib K Patra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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4
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Zhang L, Li H, Zhu Y, Zhang S. A quantum-chemical insight into SOMO-HOMO conversion in phosphorus-boron cation radicals. Phys Chem Chem Phys 2024; 26:8273-8286. [PMID: 38385562 DOI: 10.1039/d4cp00098f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Organic radicals exhibiting SOMO-HOMO conversion (SHC) electronic configurations have recently garnered increasing attention due to their exceptional stability and photophysical properties. In this study, we investigate two series of phosphorus-boron cation radicals based on 1,3,5-trimethylphenyl units substituted with P and B atoms, varying numbers of P-B moieties, and π-conjugation linkers. We perform quantum-chemical calculations to systematically assess the influence of chemical substituents on the SHC electronic structural features. Our computational results demonstrate that the SHC electronic configurations of the studied complexes are primarily determined by the number of P-B moieties, specifically, phosphorus-boron cation radicals with two P-B moieties as terminal groups in π-conjugation linkers, which efficiently arrange electrons to increase HOMO energies compared to corresponding radicals with only one P-B unit. Furthermore, spin density distributions change as the size of π-conjugation linkers increases. Natural bond orbital (NBO) and atoms-in-molecules (AIM) analyses reveal strong intramolecular charge transfer between P and B atoms along with other stabilized donor-acceptor interactions and significant covalent bonds between P and B atoms. Moreover, synergistic effects resulting from 1,3,5-trimethylphenyl substitutions and enlarged π-conjugation linkers containing P-B units confer excellent photophysical properties upon these studied radicals, making them potential stable radicals in optoelectronic applications.
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Affiliation(s)
- Li Zhang
- School of Electronic Engineering, Guangxi University of Science and Technology, Liuzhou 545000, Guangxi, China.
| | - Hongbo Li
- School of Electronic Engineering, Guangxi University of Science and Technology, Liuzhou 545000, Guangxi, China.
| | - Yanbin Zhu
- School of Electronic Engineering, Guangxi University of Science and Technology, Liuzhou 545000, Guangxi, China.
| | - Shoufeng Zhang
- School of Electronic Engineering, Guangxi University of Science and Technology, Liuzhou 545000, Guangxi, China.
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5
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Li L, Prindle CR, Shi W, Nuckolls C, Venkataraman L. Radical Single-Molecule Junctions. J Am Chem Soc 2023; 145:18182-18204. [PMID: 37555594 DOI: 10.1021/jacs.3c04487] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Radicals are unique molecular systems for applications in electronic devices due to their open-shell electronic structures. Radicals can function as good electrical conductors and switches in molecular circuits while also holding great promise in the field of molecular spintronics. However, it is both challenging to create stable, persistent radicals and to understand their properties in molecular junctions. The goal of this Perspective is to address this dual challenge by providing design principles for the synthesis of stable radicals relevant to molecular junctions, as well as offering current insight into the electronic properties of radicals in single-molecule devices. By exploring both the chemical and physical properties of established radical systems, we will facilitate increased exploration and development of radical-based molecular systems.
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Affiliation(s)
- Liang Li
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Claudia R Prindle
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Wanzhuo Shi
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Latha Venkataraman
- Department of Chemistry, Columbia University, New York, New York 10027, United States
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
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6
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Nowik-Boltyk EM, Junghoefer T, Glaser M, Giangrisostomi E, Ovsyannikov R, Zhang S, Shu C, Rajca A, Calzolari A, Casu MB. Long-Term Degradation Mechanisms in Application-Implemented Radical Thin Films. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37319383 DOI: 10.1021/acsami.3c02057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Blatter radical derivatives are very attractive due to their potential applications, ranging from batteries to quantum technologies. In this work, we focus on the latest insights regarding the fundamental mechanisms of radical thin film (long-term) degradation, by comparing two Blatter radical derivatives. We find that the interaction with different contaminants (such as atomic H, Ar, N, and O and molecular H2, N2, O2, H2O, and NH2) affects the chemical and magnetic properties of the thin films upon air exposure. Also, the radical-specific site, where the contaminant interaction takes place, plays a role. Atomic H and NH2 are detrimental to the magnetic properties of Blatter radicals, while the presence of molecular water influences more specifically the magnetic properties of the diradical thin films, and it is believed to be the major cause of the shorter diradical thin film lifetime in air.
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Affiliation(s)
| | - Tobias Junghoefer
- Institute of Physical and Theoretical Chemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Mathias Glaser
- Institute of Physical and Theoretical Chemistry, University of Tübingen, 72076 Tübingen, Germany
| | - Erika Giangrisostomi
- Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
| | - Ruslan Ovsyannikov
- Institute Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
| | - Shuyang Zhang
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Chan Shu
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | - Andrzej Rajca
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, United States
| | | | - M Benedetta Casu
- Institute of Physical and Theoretical Chemistry, University of Tübingen, 72076 Tübingen, Germany
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7
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Alcón I, Ribas-Ariño J, Moreira IDPR, Bromley ST. Emergent Spin Frustration in Neutral Mixed-Valence 2D Conjugated Polymers: A Potential Quantum Materials Platform. J Am Chem Soc 2023; 145:5674-5683. [PMID: 36877195 PMCID: PMC10021012 DOI: 10.1021/jacs.2c11185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Two-dimensional conjugated polymers (2DCPs)─organic 2D materials composed of arrays of carbon sp2 centers connected by π-conjugated linkers─are attracting increasing attention due to their potential applications in device technologies. This interest stems from the ability of 2DCPs to host a range of correlated electronic and magnetic states (e.g., Mott insulators). Substitution of all carbon sp2 centers in 2DCPs by nitrogen or boron results in diamagnetic insulating states. Partial substitution of C sp2 centers by B or N atoms has not yet been considered for extended 2DCPs but has been extensively studied in the analogous neutral mixed-valence molecular systems. Here, we employ accurate first-principles calculations to predict the electronic and magnetic properties of a new class of hexagonally connected neutral mixed-valence 2DCPs in which every other C sp2 nodal center is substituted by either a N or B atom. We show that these neutral mixed-valence 2DCPs significantly energetically favor a state with emergent superexchange-mediated antiferromagnetic (AFM) interactions between C-based spin-1/2 centers on a triangular sublattice. These AFM interactions are surprisingly strong and comparable to those in the parent compounds of cuprate superconductors. The rigid and covalently linked symmetric triangular AFM lattice in these materials thus provides a highly promising and robust basis for 2D spin frustration. As such, extended mixed-valence 2DCPs are a highly attractive platform for the future bottom-up realization of a new class of all-organic quantum materials, which could host exotic correlated electronic states (e.g., unusual magnetic ordering, quantum spin liquids).
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Affiliation(s)
- Isaac Alcón
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Jordi Ribas-Ariño
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Ibério de P R Moreira
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Stefan T Bromley
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028 Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain
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8
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Ahn M, Lee S, Kim MJ, Chae M, Cho DW, Wee KR. Systematic radical species control by electron push-pull substitution in the perylene-based D-π-A compounds. RSC Adv 2023; 13:2283-2293. [PMID: 36741181 PMCID: PMC9837613 DOI: 10.1039/d2ra06460j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 12/31/2022] [Indexed: 01/15/2023] Open
Abstract
Organic radical materials have been mainly reported on the stabilization of radical species because of their high energy and reactivity, while design strategies for controlling radical species beyond stabilization have remained challenging. Here, we report the electronic push-pull control spanning the neutral to the radical state of a series of perylene-based donor-π-acceptors (D-π-A). By introducing electron-withdrawing and -donating R groups to the donor of D-π-A, the observed intramolecular interactions controllable at the HOMO level led to the exploration of radical species. D-π-A with redox-active sites was transformed to (D-π-A)˙+ and (D-π-A)˙- in response to an external electrical stimulus under stabilization by perylene, resulting in new absorption peaks. In particular, the increasing absorption peaks of (D-π-A)˙+ showed a spectral shift and intensity change according to the R group, unlike those of (D-π-A)˙-. These experimental results support that the DFT/TD-DFT data suggests the radical cationic SOMO level variability. As a result, we provide a strategy for controlling the systematic radical species using the electron push-pull effect.
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Affiliation(s)
- Mina Ahn
- Department of Chemistry and Institute of Natural Science, Daegu UniversityGyeongsan 38453Republic of Korea
| | - Soyoon Lee
- Department of Chemistry and Institute of Natural Science, Daegu UniversityGyeongsan 38453Republic of Korea
| | - Min-Ji Kim
- Department of Chemistry and Institute of Natural Science, Daegu UniversityGyeongsan 38453Republic of Korea
| | - Minjung Chae
- Department of Chemistry and Institute of Natural Science, Daegu UniversityGyeongsan 38453Republic of Korea
| | - Dae Won Cho
- Department of Chemistry, Yeungnam UniversityGyeongsanGyeongbuk 38541Republic of Korea
| | - Kyung-Ryang Wee
- Department of Chemistry and Institute of Natural Science, Daegu UniversityGyeongsan 38453Republic of Korea
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9
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Hou L, Xu H, Zhang X, Zhang Y, Chen R, Zhang Z, Wang M. Impact of Polymer Rigidity on the Thermoresponsive Luminescence and Electron Spin Resonance of Polyester-Tethered Single Radicals. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liman Hou
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Hongxue Xu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Xuanyu Zhang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yipeng Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Rui Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhaoyu Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
| | - Mingfeng Wang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, China
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10
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Yasui R, Shimizu D, Matsuda K. Large Enhancement of the Single‐Molecular Conductance of a Molecular Wire through a Radical Substituent. Chemistry 2022; 28:e202104242. [DOI: 10.1002/chem.202104242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Indexed: 11/08/2022]
Affiliation(s)
- Ryuto Yasui
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Daiki Shimizu
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Kenji Matsuda
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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11
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Bejarano F, Gutiérrez D, Catalán-Toledo J, Roca-Sanjuán D, Gierschner J, Veciana J, Mas-Torrent M, Rovira C, Crivillers N. Photoswitching activation of a ferrocenyl-stilbene analogue by its covalent grafting to gold. Phys Chem Chem Phys 2022; 24:6185-6192. [PMID: 35229090 DOI: 10.1039/d1cp05012e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Until now, surface-deposited stilbenes have been much less studied than other photochromic systems. Here, an asymmetrically substituted styrene incorporating a redox-active ferrocene moiety and a terminal alkyne group has been synthesised to investigate its photoisomerization in solution, and upon the formation of chemisorbed self-assembled monolayers through a carbon-gold bond formation. Charge transport measurements across the monolayers reveal that upon chemical linkage to the gold substrate there is an alteration of the isomerization pathway, which favours the trans to cis conversion, which is not observed in solution. The experimental observations are interpreted based on quantum chemistry calculations.
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Affiliation(s)
- Francesc Bejarano
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Diego Gutiérrez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain. .,Leitat Technological Center (LEITAT), Carrer Innovació, 2, 08225 Terrassa, Spain
| | - José Catalán-Toledo
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Daniel Roca-Sanjuán
- Institute of Molecular Science, University of Valencia, P.O. Box 22085, ES-46071 Valencia, Spain
| | - Johannes Gierschner
- Madrid Institute for Advanced Studies, IMDEA Nanoscience, Calle Faraday 9, Campus Cantoblanco, 28049 Madrid, Spain.
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and CIBER-BBN, Campus de la UAB, 08193 Bellaterra, Spain.
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12
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Proton-induced Conversion from Non-Aufbau to Aufbau Electronic Structure of an Organic Radical with Turn-on Fluorescence. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2015-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Chen JF, Tian G, Liu K, Zhang N, Wang N, Yin X, Chen P. Pillar[5]arene-based Neutral Radicals with Doublet Red Emissions and Stable Chiroptical Properties. Org Lett 2022; 24:1935-1940. [PMID: 35243861 DOI: 10.1021/acs.orglett.2c00313] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Stable organic radicals with unique luminescence show great importance in photoelectromagnetic materials. We herein report two unusual radical-based systems (P5N-TTM and P5B-TTM) using the concerted effects of planar chiral pillar[5]arenes and tris(2,4,6-trichlorophenyl)methyl (TTM) radicals. The steric effect and electronic doublet-spin character of these radicals allowed the optical resolution and the first red emissions (∼650 nm) for pillar[5]arene derivatives. Notably, cross-coupling with macrocyclic pillar[5]arene, in turn, considerably enhanced the configurational stability of TTM radicals.
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Affiliation(s)
- Jin-Fa Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Guoqing Tian
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Kanglei Liu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Niu Zhang
- Analysis & Testing Centre, Beijing Institute of Technology of China, Beijing 102488, China
| | - Nan Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Xiaodong Yin
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
| | - Pangkuan Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science of the Ministry of Education, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology of China, Beijing 102488, China
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14
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Lloveras V, Elías-Rodríguez P, Bursi L, Shirdel E, Goñi AR, Calzolari A, Vidal-Gancedo J. Multifunctional Switch Based on Spin-Labeled Gold Nanoparticles. NANO LETTERS 2022; 22:768-774. [PMID: 35078323 DOI: 10.1021/acs.nanolett.1c04294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The fabrication of multifunctional switches is a fundamental step in the development of nanometer-scale molecular spintronic devices. The anchoring of active organic radicals on gold nanoparticles (AuNPs) surface is little studied and the realization of AuNPs-based switches remains extremely challenging. We report the first demonstration of a surface molecular switch based on AuNPs decorated with persistent perchlorotriphenylmethyl (PTM) radicals. The redox properties of PTM are exploited to fabricate electrochemical switches with optical and magnetic responses, showing high stability and reversibility. Electronic interaction between the radicals and the gold surface is investigated by UV-vis, showing a very broad absorption band in the near-infrared (NIR) region, which becomes more intense when PTMs are reduced to anionic phase. By using multiple experimental techniques, we demonstrate that this interaction is likely favored by the preferentially flat orientation of PTM ligands on the metallic NP surface, as confirmed by first-principles simulations.
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Affiliation(s)
- Vega Lloveras
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), E-08193 Barcelona, Spain
| | - Pilar Elías-Rodríguez
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
| | - Luca Bursi
- CNR-NANO Istituto Nanoscienze, Centro S3, I-41125 Modena, Italy
| | - Ehsan Shirdel
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
| | - Alejandro R Goñi
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | | | - José Vidal-Gancedo
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), E-08193 Barcelona, Spain
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15
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Feng Z, Chong Y, Tang S, Fang Y, Zhao Y, Jiang J, Wang X. A stable triplet diradical emitter. Chem Sci 2021; 12:15151-15156. [PMID: 34909157 PMCID: PMC8612405 DOI: 10.1039/d1sc04486a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 11/04/2021] [Indexed: 11/23/2022] Open
Abstract
Molecules with luminescence have been extensively investigated, but the luminescence of a stable molecule with a triplet ground state has not been observed. Synthesis of boron-containing radicals has attracted lots of interest because of their unique electronic structures and potential applications in organic semiconductors. Though some boron-based diradicals have been reported, neutral boron-containing diradicals with triplet ground states are rare. Herein two borocyclic diradicals with different substituents (3 and 4) have been isolated. Their electronic structures were investigated by EPR and UV spectroscopy, and SQUID magnetometry, in conjunction with DFT calculations. Both experiment and calculation suggest that 3 is an open shell singlet diradical while 4 is a triplet ground state diradical with a large singlet–triplet gap (0.25 kcal mol−1). Both diradicals show multi fluorescence peaks (3: 414, 431, and 470 nm; 4: 420, 433, and 495 nm). 3 displays multiple redox steps and is a potential material towards the design of high-density memory devices. 4 represents the first example of a neutral triplet boron-containing diradical with a strong ferromagnetic interaction, and also is the first stable triplet diradical emitter. Stable borocyclic diradical emitters with a tunable ground state.![]()
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Affiliation(s)
- Zhongtao Feng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Yuanyuan Chong
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China Hefei Anhui 230026 China
| | - Shuxuan Tang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Yong Fang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
| | - Jun Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, School of Chemistry and Materials Science, University of Science and Technology of China Hefei Anhui 230026 China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University Nanjing 210023 China
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16
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Sanchis-Gual R, Torres-Cavanillas R, Coronado-Puchau M, Giménez-Marqués M, Coronado E. Plasmon-assisted spin transition in gold nanostar@spin crossover heterostructures. JOURNAL OF MATERIALS CHEMISTRY. C 2021; 9:10811-10818. [PMID: 35360440 PMCID: PMC8900490 DOI: 10.1039/d1tc01943k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/02/2021] [Indexed: 06/01/2023]
Abstract
Herein we report the design of core@shell nanoparticles formed by a metallic Au nanostar core and a spin-crossover shell based on the coordination polymer [Fe(Htrz)2(trz)](BF4). This procedure is general and has been extended to other metallic morphologies (nanorods, nanotriangles). Thanks to the photothermal effect arising from the plasmonic properties of the Au nanostar, 60% of iron centers undergo a thermal spin transition inside the thermal hysteresis triggered by a 808 nm laser low intensity irradiation. Compared to other Au morphologies, the great advantage of the nanostar shape arises from the hot spots created at the branches of the nanostar. These hot spots give rise to large NIR absorptions, making them ideal nanostructures for efficiently converting light into heat using low energy light, like that provided by a 808 nm laser.
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Affiliation(s)
- Roger Sanchis-Gual
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Marc Coronado-Puchau
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Mónica Giménez-Marqués
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València Catedrático José Beltran 2 46980 Paterna Spain
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17
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Mayorga-Burrezo P, Bejarano F, Calbo J, Zhao X, De Sousa JA, Lloveras V, Bryce MR, Ortí E, Veciana J, Rovira C, Crivillers N. Allocation of Ambipolar Charges on an Organic Diradical with a Vinylene-Phenylenediyne Bridge. J Phys Chem Lett 2021; 12:6159-6164. [PMID: 34184906 DOI: 10.1021/acs.jpclett.1c01565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two redox and magnetically active perchlorotriphenylmethyl (•PTM) radical units have been connected as end-capping groups to a bis(phenylene)diyne chain through vinylene linkers. Negative and positive charged species have been generated, and the influence of the bridge on their stabilization is discussed. Partial reduction of the electron-withdrawing •PTM radicals results in a class-II mixed-valence system with the negative charge located on the terminal PTM units, proving the efficiency of the conjugated chain for the electron transport between the two terminal sites. Counterintuitively, the oxidation process does not occur along the electron-rich bridge but on the vinylene units. The •PTM radicals play a key role in the stabilization of the cationic species, promoting the generation of quinoidal ring segments.
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Affiliation(s)
- Paula Mayorga-Burrezo
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Francesc Bejarano
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Joaquín Calbo
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Xiaotao Zhao
- Chemistry Department, Durham University, Durham DH1 3LE, United Kingdom
| | - J Alejandro De Sousa
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Laboratorio de Electroquímica, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, 5101 Mérida, Venezuela
| | - Vega Lloveras
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Martin R Bryce
- Chemistry Department, Durham University, Durham DH1 3LE, United Kingdom
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
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18
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Alcón I, Shao J, Tremblay JC, Paulus B. Conformational control over π-conjugated electron pairing in 1D organic polymers. RSC Adv 2021; 11:20498-20506. [PMID: 35479909 PMCID: PMC9033971 DOI: 10.1039/d1ra03187b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 05/21/2021] [Indexed: 11/21/2022] Open
Abstract
During the past decades π-conjugated bi-radicals have attracted increasing attention, due to the existence of two close-in-energy resonant electronic configurations with very distinct characteristics: the open-shell bi-radical and the closed-shell quinoidal. The chemical design of the bi-radical structure has been shown to be very effective to shift the balance towards one, or the other, electronic distribution. Some reports have experimentally studied the analogous 1D oligomers and polymers, however, only the open-shell multi-radical configuration has been detected, and it is yet not very clear which structural and chemical parameters are relevant in such extended systems. In this work, via first principles quantum chemical simulations, we study a series of π-conjugated 1D polymers based on triarylmethyl radicals with different chemical functionalization. We find that dihedral angles of the aryl rings connecting the radical centres are the key conformational parameter determining the electronic balance. This provides a simple recipe to use chemical functionalization of aryl rings as a tool to shift the system towards either the electron paired or unpaired configurations. Additionally, we find such conformational control is also effective under the effect of thermal fluctuations, which highlights its potential technological applicability.
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Affiliation(s)
- Isaac Alcón
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin Arnimallee 22 14195 Berlin Germany
| | - Jingjing Shao
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin Arnimallee 22 14195 Berlin Germany
| | | | - Beate Paulus
- Institut für Chemie und Biochemie, Physikalische und Theoretische Chemie, Freie Universität Berlin Arnimallee 22 14195 Berlin Germany
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19
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Hao Q, Li ZJ, Bai B, Zhang X, Zhong YW, Wan LJ, Wang D. A Covalent Organic Framework Film for Three-State Near-Infrared Electrochromism and a Molecular Logic Gate. Angew Chem Int Ed Engl 2021; 60:12498-12503. [PMID: 33756014 DOI: 10.1002/anie.202100870] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/02/2021] [Indexed: 11/10/2022]
Abstract
A Kagome structure covalent organic framework (COF) film with three-state NIR electrochromic properties was designed and synthesized. The COFTPDA-PDA film is composed of hexagonal nanosheets with high crystallinity and has three reversible color states at different applied potentials. It has high absorption spectra changes in the NIR region, ascribed to the strong intervalence charge transfer (IVCT) interaction of the Class III mixed-valence systems of the conjugated triphenylamine species. The film showed sub-second response time (1.3 s for coloring and 0.7 s for bleaching at 1050 nm) and long retention time in the NIR region. COFTPDA-PDA film shows superior NIR electrochromic properties in term of response time and stability, attributed to the highly ordered porous structure and the π-π stacking structure of the COFTPDA-PDA architecture. The COFTPDA-PDA film was applied in mimicking a flip-flop logic gate with optical memory function.
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Affiliation(s)
- Qing Hao
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhi-Juan Li
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Bai
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xing Zhang
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Yu-Wu Zhong
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Jun Wan
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Dong Wang
- Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
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20
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Photochromism and photo-switchable luminescence properties of a methacrylate-based inorganic-organic hybrid compound. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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21
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Hao Q, Li Z, Bai B, Zhang X, Zhong Y, Wan L, Wang D. A Covalent Organic Framework Film for Three‐State Near‐Infrared Electrochromism and a Molecular Logic Gate. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qing Hao
- Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zhi‐Juan Li
- Key Laboratory of Photochemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Bin Bai
- Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Xing Zhang
- Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Yu‐Wu Zhong
- Key Laboratory of Photochemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Li‐Jun Wan
- Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Dong Wang
- Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
- University of the Chinese Academy of Sciences Beijing 100049 P. R. China
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22
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Muñoz J, Redondo E, Pumera M. Bistable (Supra)molecular Switches on 3D-Printed Responsive Interfaces with Electrical Readout. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12649-12655. [PMID: 33305562 DOI: 10.1021/acsami.0c14487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Molecular switching memories have gained great importance in recent years because of the current sharp increase in the production of consumer electronics. Herein, 3D-printed nanocomposite carbon electrodes (3D-nCEs) have been explored as unconventional responsive interfaces to electrically readout bistable molecular switches via electrochemical impedance spectroscopy as the output system. As a proof-of-concept, two different 3D-printed responsive interfaces have been devised using surface engineering for covalently anchoring (supra)molecular components that well-define two electrical states (on/off) driven by either electrical or optical stimuli. Accordingly, this work paves the way for the functionalization of 3D-nCEs through fundamental chemistry, opening up new horizons in unprecedented tailored 3D-printed responsive interfaces which could be utilized as potential (bio)sensors, (opto)electronic devices, or molecular logic gates.
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Affiliation(s)
- Jose Muñoz
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
| | - Edurne Redondo
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
| | - Martin Pumera
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
- Department of Medical Research, China Medical University Hospital, China Medical University, No. 91 Hsueh-Shih Road, Taichung, Taiwan
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, Brno CZ-613 00, Czech Republic
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
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23
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Nirmala A, Mukkatt I, Shankar S, Ajayaghosh A. Thermochromic Color Switching to Temperature Controlled Volatile Memory and Counter Operations with Metal–Organic Complexes and Hybrid Gels. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Anjali Nirmala
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
| | - Indulekha Mukkatt
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
| | - Sreejith Shankar
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
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24
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Parejo L, Chaari M, Santiago S, Guirado G, Teixidor F, Núñez R, Hernando J. Reversibly Switchable Fluorescent Molecular Systems Based on Metallacarborane-Perylenediimide Conjugates. Chemistry 2021; 27:270-280. [PMID: 32648595 DOI: 10.1002/chem.202002419] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Indexed: 12/31/2022]
Abstract
Icosahedral metallacarboranes are θ-shaped anionic molecules in which two icosahedra share one vertex that is a metal center. The most remarkable of these compounds is the anionic cobalt-based metallacarborane [Co(C2 B9 H11 )2 ]- , whose oxidation-reduction processes occur via an outer sphere electron process. This, along with its low density negative charge, makes [Co(C2 B9 H11 )2 ]- very appealing to participate in electron-transfer processes. In this work, [Co(C2 B9 H11 )2 ]- is tethered to a perylenediimide dye to produce the first examples of switchable luminescent molecules and materials based on metallacarboranes. In particular, the electronic communication of [Co(C2 B9 H11 )2 ]- with the appended chromophore unit in these compounds can be regulated upon application of redox stimuli, which allows the reversible modulation of the emitted fluorescence. As such, they behave as electrochemically-controlled fluorescent molecular switches in solution, which surpass the performance of previous systems based on conjugates of perylendiimides with ferrocene. Remarkably, they can form gels by treatment with appropriate mixtures of organic solvents, which result from the self-assembly of the cobaltabisdicarbollide-perylendiimide conjugates into 1D nanostructures. The interplay between dye π-stacking and metallacarborane electronic and steric interactions ultimately governs the supramolecular arrangement in these materials, which for one of the compounds prepared allows preserving the luminescent behavior in the gel state.
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Affiliation(s)
- Laura Parejo
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
| | - Mahdi Chaari
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Barcelona, Spain
| | - Sara Santiago
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
| | - Gonzalo Guirado
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
| | - Francesc Teixidor
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Barcelona, Spain
| | - Rosario Núñez
- Institut de Ciencia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193, Barcelona, Spain
| | - Jordi Hernando
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Barcelona, Spain
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25
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Synthesis and redox properties of cyclometallated iridium (III) complexes modified with arylamino groups. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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26
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Manipulation of Molecular Spin State on Surfaces Studied by Scanning Tunneling Microscopy. NANOMATERIALS 2020; 10:nano10122393. [PMID: 33266045 PMCID: PMC7761235 DOI: 10.3390/nano10122393] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 11/27/2020] [Accepted: 11/27/2020] [Indexed: 11/17/2022]
Abstract
The adsorbed magnetic molecules with tunable spin states have drawn wide attention for their immense potential in the emerging fields of molecular spintronics and quantum computing. One of the key issues toward their application is the efficient controlling of their spin state. This review briefly summarizes the recent progress in the field of molecular spin state manipulation on surfaces. We focus on the molecular spins originated from the unpaired electrons of which the Kondo effect and spin excitation can be detected by scanning tunneling microscopy and spectroscopy (STM and STS). Studies of the molecular spin-carriers in three categories are overviewed, i.e., the ones solely composed of main group elements, the ones comprising 3d-metals, and the ones comprising 4f-metals. Several frequently used strategies for tuning molecular spin state are exemplified, including chemical reactions, reversible atomic/molecular chemisorption, and STM-tip manipulations. The summary of the successful case studies of molecular spin state manipulation may not only facilitate the fundamental understanding of molecular magnetism and spintronics but also inspire the design of the molecule-based spintronic devices and materials.
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Nirmala A, Mukkatt I, Shankar S, Ajayaghosh A. Thermochromic Color Switching to Temperature Controlled Volatile Memory and Counter Operations with Metal–Organic Complexes and Hybrid Gels. Angew Chem Int Ed Engl 2020; 60:455-465. [DOI: 10.1002/anie.202011580] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/09/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Anjali Nirmala
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
| | - Indulekha Mukkatt
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
| | - Sreejith Shankar
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR— National Institute for Interdisciplinary Sciences and Technology (CSIR—NIIST) Thiruvananthapuram 695019 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR Human Resource Development Centre Ghaziabad 201002 India
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Liu CH, Hamzehpoor E, Sakai-Otsuka Y, Jadhav T, Perepichka DF. A Pure-Red Doublet Emission with 90 % Quantum Yield: Stable, Colorless, Iodinated Triphenylmethane Solid. Angew Chem Int Ed Engl 2020; 59:23030-23034. [PMID: 32822514 DOI: 10.1002/anie.202009867] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Indexed: 11/06/2022]
Abstract
Red luminescence is found in off-white tris(iodoperchlorophenyl)methane (3I-PTMH ) crystals which is characterized by a high photoluminescence quantum yield (PLQY 91 %) and color purity (CIE coordinates 0.66, 0.34). The emission originates from the doublet excited state of the neutral radical 3I-PTMR , which is spontaneously formed and becomes embedded in the 3I-PTMH matrix. The radical defect can also be deliberately introduced into 3I-PTMH crystals which maintain a high PLQY with up to 4 % radical concentration. The immobilized iodinated radical demonstrates excellent photostability (estimated half-life >1 year under continuous irradiation) and intriguing luminescent lifetime (69 ns). TD-DFT calculations demonstrate that electron-donating iodine atoms accelerate the radiative transition while the rigid halogen-bonded matrix suppresses the nonradiative decay.
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Affiliation(s)
- Cheng-Hao Liu
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Ehsan Hamzehpoor
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Yoko Sakai-Otsuka
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Thaksen Jadhav
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Dmitrii F Perepichka
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
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Liu C, Hamzehpoor E, Sakai‐Otsuka Y, Jadhav T, Perepichka DF. A Pure‐Red Doublet Emission with 90 % Quantum Yield: Stable, Colorless, Iodinated Triphenylmethane Solid. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Cheng‐Hao Liu
- Department of Chemistry McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Ehsan Hamzehpoor
- Department of Chemistry McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Yoko Sakai‐Otsuka
- Department of Chemistry McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Thaksen Jadhav
- Department of Chemistry McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Dmitrii F. Perepichka
- Department of Chemistry McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
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Demay-Drouhard P, Ching HYV, Decroos C, Guillot R, Li Y, Tabares LC, Policar C, Bertrand HC, Un S. Understanding the g-tensors of perchlorotriphenylmethyl and Finland-type trityl radicals. Phys Chem Chem Phys 2020; 22:20792-20800. [PMID: 32909565 DOI: 10.1039/d0cp03626a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The 285 GHz EPR spectra of perchlorotriphenylmethyl and tetrathiatriarylmethyl radicals in frozen solution have been accurately measured. The relationship between their molecular structures and their g-tensors has been investigated with the aid of DFT calculations, revealing that the degree of spin density delocalization away from the central methylene carbon is an important determining factor of the g-anisotropy. In particular, the small amount of spin densities on the Cl or S heteroatoms at the 2 and 6 positions with respect to the central carbon have the strongest influence. Furthermore, the amount of spin densities on these heteroatoms and thus the anisotropy can be modulated by the protonation (esterification) state of the carboxylate groups at the 4 position. These results provide unique insights into the g-anisotropy of persistent trityl radicals and how it can be tuned.
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Affiliation(s)
- Paul Demay-Drouhard
- Laboratoire des Biomolécules, LBM, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France.
| | - H Y Vincent Ching
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France.
| | - Christophe Decroos
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Sud, CNRS UMR 8182, Université Paris-Saclay, 91405 Orsay, France
| | - Yun Li
- Laboratoire de Chimie des Processus Biologiques, CNRS UMR 8229, Collège de France, PSL University, Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
| | - Leandro C Tabares
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France.
| | - Clotilde Policar
- Laboratoire des Biomolécules, LBM, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France.
| | - Helene C Bertrand
- Laboratoire des Biomolécules, LBM, Département de Chimie, Ecole Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France.
| | - Sun Un
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198, Gif-sur-Yvette, France.
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32
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Han Y, Nickle C, Zhang Z, Astier HPAG, Duffin TJ, Qi D, Wang Z, Del Barco E, Thompson D, Nijhuis CA. Electric-field-driven dual-functional molecular switches in tunnel junctions. NATURE MATERIALS 2020; 19:843-848. [PMID: 32483243 DOI: 10.1038/s41563-020-0697-5] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/28/2020] [Indexed: 05/24/2023]
Abstract
To avoid crosstalk and suppress leakage currents in resistive random access memories (RRAMs), a resistive switch and a current rectifier (diode) are usually combined in series in a one diode-one resistor (1D-1R) RRAM. However, this complicates the design of next-generation RRAM, increases the footprint of devices and increases the operating voltage as the potential drops over two consecutive junctions1. Here, we report a molecular tunnel junction based on molecules that provide an unprecedented dual functionality of diode and variable resistor, resulting in a molecular-scale 1D-1R RRAM with a current rectification ratio of 2.5 × 104 and resistive on/off ratio of 6.7 × 103, and a low drive voltage of 0.89 V. The switching relies on dimerization of redox units, resulting in hybridization of molecular orbitals accompanied by directional ion migration. This electric-field-driven molecular switch operating in the tunnelling regime enables a class of molecular devices where multiple electronic functions are preprogrammed inside a single molecular layer with a thickness of only 2 nm.
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Affiliation(s)
- Yingmei Han
- Department of Chemistry, National University of Singapore, Singapore, Singapore
| | - Cameron Nickle
- Department of Physics, University of Central Florida, Orlando, FL, USA
| | - Ziyu Zhang
- Department of Chemistry, National University of Singapore, Singapore, Singapore
| | | | - Thorin J Duffin
- Department of Chemistry, National University of Singapore, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Dongchen Qi
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Zhe Wang
- Department of Chemistry, National University of Singapore, Singapore, Singapore
| | - Enrique Del Barco
- Department of Physics, University of Central Florida, Orlando, FL, USA.
| | - Damien Thompson
- Department of Physics, Bernal Institute, University of Limerick, Limerick, Ireland.
| | - Christian A Nijhuis
- Department of Chemistry, National University of Singapore, Singapore, Singapore.
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore.
- Centre for Advanced 2D Materials and Graphene Research Center, National University of Singapore, Singapore, Singapore.
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Avalos CE, Richert S, Socie E, Karthikeyan G, Casano G, Stevanato G, Kubicki DJ, Moser JE, Timmel CR, Lelli M, Rossini AJ, Ouari O, Emsley L. Enhanced Intersystem Crossing and Transient Electron Spin Polarization in a Photoexcited Pentacene–Trityl Radical. J Phys Chem A 2020; 124:6068-6075. [DOI: 10.1021/acs.jpca.0c03498] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Claudia E. Avalos
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sabine Richert
- Centre for Advanced Electron Spin Resonance (CAESR), University of Oxford, South Parks Road, OX1 3QR Oxford, United Kingdom
| | - Etienne Socie
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | | | | | - Gabriele Stevanato
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Dominik J. Kubicki
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jacques E. Moser
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Christiane R. Timmel
- Centre for Advanced Electron Spin Resonance (CAESR), University of Oxford, South Parks Road, OX1 3QR Oxford, United Kingdom
| | - Moreno Lelli
- Center of Magnetic Resonance (CERM), University of Florence, Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Italy
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Aaron J. Rossini
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | | | - Lyndon Emsley
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Ikeda T, Tahara K, Kadoya T, Tajima H, Toyoda N, Yasuno S, Ozawa Y, Abe M. Ferrocene on Insulator: Silane Coupling to a SiO 2 Surface and Influence on Electrical Transport at a Buried Interface with an Organic Semiconductor Layer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:5809-5819. [PMID: 32407106 DOI: 10.1021/acs.langmuir.0c00515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A silane coupling-based procedure for decoration of an insulator surface containing abundant hydroxy groups by constructing redox-active self-assembled monolayers (SAMs) is described. A newly synthesized ferrocene (Fc) derivative containing a triethoxysilyl group designated FcSi was immobilized on SiO2/Si by a simple operation that involved immersing the substrate in a toluene solution of the Fc silane coupling reagent and then rinsing the resulting substrate. X-ray photoelectron spectroscopy (XPS) measurements confirmed that the Fc group was immobilized on SiO2/Si in the Fe(II) state. Cyclic voltammetry measurements showed that the Fc groups were electrically insulated from the Si electrode by the SiO2 layer. The FcSi on SiO2/Si structures were found to serve as a good scaffold for formation of organic semiconductor thin films by vacuum thermal evaporation of C8-BTBT (2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene), which is well-known as an organic field-effect transistor (OFET) material. The X-ray diffraction profile indicated that the conventional standing-up conformation of the C8-BTBT molecules perpendicular to the substrates was maintained in the thin films formed on FcSi@SiO2/Si. Further vacuum thermal evaporation of Au provided an FcSi-based OFET structure with good transfer characteristics. The FcSi-based OFET showed pronounced source-drain current hysteresis between the forward and backward scans. The degree of this hysteresis was varied reversibly via gate bias manipulation, which was presumably accompanied by trapping and detrapping of hole carriers at the Fc-decorated SiO2 surface. These findings provide new insights into application of redox-active SAMs to nonvolatile OFET memories while also creating new interfaces through junctions with functional thin films, in which the underlying redox-active SAMs play supporting roles.
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Affiliation(s)
- Takashi Ikeda
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Keishiro Tahara
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Tomofumi Kadoya
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Hiroyuki Tajima
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Noriaki Toyoda
- Graduate School of Engineering, University of Hyogo, 2167, Shosha, Himeji, Hyogo 671-2280, Japan
| | - Satoshi Yasuno
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo, Hyogo 679-5198, Japan
| | - Yoshiki Ozawa
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Masaaki Abe
- Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
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Ajayakumar MR, Moreno C, Alcón I, Illas F, Rovira C, Veciana J, Bromley ST, Mugarza A, Mas-Torrent M. Neutral Organic Radical Formation by Chemisorption on Metal Surfaces. J Phys Chem Lett 2020; 11:3897-3904. [PMID: 32343903 DOI: 10.1021/acs.jpclett.0c00269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organic radical monolayers (r-MLs) bonded to metal surfaces are potential materials for the development of molecular (spin)electronics. Typically, stable radicals bearing surface anchoring groups are used to generate r-MLs. Following a recent theoretical proposal based on a model system, we report the first experimental realization of a metal surface-induced r-ML, where a rationally chosen closed-shell precursor 3,5-dichloro-4-[bis(2,4,6-trichlorophenyl)methylen]cyclohexa-2,5-dien-1-one (1) transforms into a stable neutral open-shell species (1•) via chemisorption on the Ag(111) surface. X-ray photoelectron spectroscopy reveals that the >C═O group of 1 reacts with the surface, forming a C-O-Ag linkage that induces an electronic rearrangement that transforms 1 to 1•. We further show that surface reactivity is an important factor in this process whereby Au(111) is inert towards 1, whereas the Cu(111) surface leads to dehalogenation reactions. The radical nature of the Ag(111)-bound monolayer was further confirmed by angle-resolved photoelectron spectroscopy and electronic structure calculations, which provide evidence of the emergence of the singly occupied molecular orbital (SOMO) of 1•.
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Affiliation(s)
- M R Ajayakumar
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Campus de la UAB, E-08193 Bellaterra, Spain
| | - César Moreno
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Isaac Alcón
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Campus de la UAB, E-08193 Bellaterra, Spain
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Campus de la UAB, E-08193 Bellaterra, Spain
| | - Stefan T Bromley
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona, Spain
| | - Aitor Mugarza
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona, Spain
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) and Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Campus de la UAB, E-08193 Bellaterra, Spain
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Hu YX, Zhang J, Zhang F, Wang X, Yin J, Hartl F, Liu SH. Electronic Properties of Oxidized Cyclometalated Diiridium Complexes: Spin Delocalization Controlled by the Mutual Position of the Iridium Centers. Chemistry 2020; 26:4567-4575. [PMID: 31891433 DOI: 10.1002/chem.201904894] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 12/20/2019] [Indexed: 11/10/2022]
Abstract
Four cyclometalated diiridium complexes, with IrCp*Cl (Cp*=η5 -C5 Me5 - ) termini bridged by 1,4- and 1,3-bis(p-tolyliminoethyl)benzene (1, 2), or 1,4- and 1,3-bis(2-pyridyl)benzene (3, 4), were prepared and characterized by nuclear magnetic resonance (NMR) spectroscopy and single-crystal X-ray diffraction (complexes 1, 2, and 4). The two iridium centers in complexes 1 and 3 are thus bound at the central benzene ring in the para-position (trans-Ir2), whereas those in complexes 2 and 4 are in the meta-position (cis-Ir2). Cyclic voltammograms of all four complexes show two consecutive one-electron oxidations. The potential difference between the two anodic steps in 1 and 3 is distinctly larger than that for 2 and 4. The visible-near-infrared (NIR)-short-wave infrared (SWIR) absorption spectra of trans-Ir2 monocations 1+ and 3+ are markedly different from those of cis-Ir2 monocations 2+ and 4+ . Notably, strong near-infrared electronic absorption appears only in the spectra of 1+ and 3+ whereas 2+ and 4+ absorb only weakly in the NIR-SWIR region. Combined DFT and TD-DFT calculations have revealed that (a) 1+ and 3+ (the diiridium-benzene trans-isomers) display the highest occupied spin-orbitals (HOSO) and the lowest unoccupied spin-orbital (LUSO) evenly delocalized over both molecule halves, and (b) their electronic absorptions in the NIR-SWIR region are attributed to mixed metal-to-ligand and ligand-to-ligand charge transfers (MLCT and LLCT). In contrast, cis-isomers 2+ and 4+ do not feature this stabilizing π-delocalization but a localized mixed-valence state showing a weak intervalence charge-transfer (IVCT) absorption in the SWIR region.
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Affiliation(s)
- Yu Xuan Hu
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Jing Zhang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Fangfang Zhang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Xiaoyan Wang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - Jun Yin
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
| | - František Hartl
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - Sheng Hua Liu
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China
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Votkina DE, Petunin PV, Zhivetyeva SI, Bagryanskaya IY, Uvarov MN, Kazantsev MS, Trusova ME, Tretyakov EV, Postnikov PS. Preparation of Multi-Spin Systems: A Case Study of Tolane-Bridged Verdazyl-Based Hetero-Diradicals. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Darya E. Votkina
- Research School of Chemistry & Applied Biomedical Sciences; Tomsk Polytechnic University; 30 Lenin Avenue 634050 Tomsk Russia
| | - Pavel V. Petunin
- Research School of Chemistry & Applied Biomedical Sciences; Tomsk Polytechnic University; 30 Lenin Avenue 634050 Tomsk Russia
- Siberian State Medical University; 2 Moskovskiy trakt 634050 Tomsk Russia
| | - Svetlana I. Zhivetyeva
- N. N. Vorozhtsov Institute of Organic Chemistry; Siberian Branch of Russian Academy of Sciences (SB RAS); 9 Ac. Lavrentiev Avenue 630090 Novosibirsk Russia
| | - Irina Yu. Bagryanskaya
- N. N. Vorozhtsov Institute of Organic Chemistry; Siberian Branch of Russian Academy of Sciences (SB RAS); 9 Ac. Lavrentiev Avenue 630090 Novosibirsk Russia
- Novosibirsk State University; 2 Pirogova Str. 630090 Novosibirsk Russia
| | - Mikhail N. Uvarov
- Novosibirsk State University; 2 Pirogova Str. 630090 Novosibirsk Russia
- SB RAS; V.V. Voevodsky Institute of Chemical Kinetics and Combustion; 3 Institutskaya Str. 630090 Novosibirsk Russia
| | - Maxim S. Kazantsev
- N. N. Vorozhtsov Institute of Organic Chemistry; Siberian Branch of Russian Academy of Sciences (SB RAS); 9 Ac. Lavrentiev Avenue 630090 Novosibirsk Russia
| | - Marina E. Trusova
- Research School of Chemistry & Applied Biomedical Sciences; Tomsk Polytechnic University; 30 Lenin Avenue 634050 Tomsk Russia
| | - Evgeny V. Tretyakov
- N. N. Vorozhtsov Institute of Organic Chemistry; Siberian Branch of Russian Academy of Sciences (SB RAS); 9 Ac. Lavrentiev Avenue 630090 Novosibirsk Russia
- Novosibirsk State University; 2 Pirogova Str. 630090 Novosibirsk Russia
| | - Pavel S. Postnikov
- Research School of Chemistry & Applied Biomedical Sciences; Tomsk Polytechnic University; 30 Lenin Avenue 634050 Tomsk Russia
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Qiu H, Liu Z, Yao Y, Herder M, Hecht S, Samorì P. Simultaneous Optical Tuning of Hole and Electron Transport in Ambipolar WSe 2 Interfaced with a Bicomponent Photochromic Layer: From High-Mobility Transistors to Flexible Multilevel Memories. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907903. [PMID: 31977121 DOI: 10.1002/adma.201907903] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 12/23/2019] [Indexed: 06/10/2023]
Abstract
The interfacing of 2D materials (2DMs) with photochromic molecules provides an efficient solution to reversibly modulate their outstanding electronic properties and offers a versatile platform for the development of multifunctional field-effect transistors (FETs). Herein, optically switchable multilevel high-mobility FETs based on few-layer ambipolar WSe2 are realized by applying on its surface a suitably designed bicomponent diarylethene (DAE) blend, in which both hole and electron transport can be simultaneously modulated for over 20 cycles. The high output current modulation efficiency (97% for holes and 52% for electrons) ensures 128 distinct current levels, corresponding to a data storage capacity of 7 bit. The device is also implemented on a flexible and transparent poly(ethylene terephthalate) substrate, rendering 2DM/DAE hybrid structures promising candidates for flexible multilevel nonvolatile memories.
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Affiliation(s)
- Haixin Qiu
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, F-67000, Strasbourg, France
| | - Zhaoyang Liu
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, F-67000, Strasbourg, France
| | - Yifan Yao
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, F-67000, Strasbourg, France
| | - Martin Herder
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Stefan Hecht
- Department of Chemistry and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
- DWI-Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52056, Aachen, Germany
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringer Weg 2, 52074, Aachen, Germany
| | - Paolo Samorì
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Alleé Gaspard Monge, F-67000, Strasbourg, France
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39
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Ma YJ, Hu JX, Han SD, Pan J, Li JH, Wang GM. Manipulating On/Off Single-Molecule Magnet Behavior in a Dy(III)-Based Photochromic Complex. J Am Chem Soc 2020; 142:2682-2689. [PMID: 31955567 DOI: 10.1021/jacs.9b13461] [Citation(s) in RCA: 214] [Impact Index Per Article: 53.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Exploitation of room temperature (RT) photochromism and photomagnetism to induce single-molecule magnet (SMM) behavior has potential applications toward optical switches and magnetic memories, and remains a tremendous challenge in the development of new bulk magnets. Herein, a series of chain complexes [Ln3(H-HEDP)3(H2-HEDP)3]·2H3-TPT·H4-HEDP·10H2O (QDU-1; Ln = Dy (QDU-1(Dy)), Gd (QDU-1(Gd)), and Y (QDU-1(Y)); HEDP = hydroxyethylidene diphosphonate; TPT = 2,4,6-tri(4-pyridyl)-1,3,5-triazine) were synthesized by solvothermal reactions. All the compounds exhibited reversible photochromic and photomagnetic behaviors via UV light irradiation at RT, induced by the photogenerated radicals via a photoinduced electron transfer (PET) mechanism. More importantly, the PET process induced significant variations in magnetic interactions for the Dy(III) congener. Strong ferromagnetic coupling with remarkably slow magnetic relaxation without applied dc fields was observed between DyIII ions and photogenerated O• radicals, showing SMM behavior after RT illumination. For the first time, we observed the reversible RT photochromism and photomagnetism in the lanthanide-based materials. This work realized the radicals-actuated on/off SMM behavior via RT light irradiation, providing a new strategy for constructing the light-induced SMMs.
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Affiliation(s)
- Yu-Juan Ma
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
| | - Ji-Xiang Hu
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
| | - Song-De Han
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
| | - Jie Pan
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
| | - Jin-Hua Li
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
| | - Guo-Ming Wang
- College of Chemistry and Chemical Engineering , Qingdao University , Shandong 266071 , P. R. China
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40
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Bartos P, Anand B, Pietrzak A, Kaszyński P. Functional Planar Blatter Radical through Pschorr-Type Cyclization. Org Lett 2019; 22:180-184. [DOI: 10.1021/acs.orglett.9b04130] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paulina Bartos
- Faculty of Chemistry, University of Łódź, 91-403 Łódź, Poland
| | - Bindushree Anand
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
| | - Anna Pietrzak
- Faculty of Chemistry, Łódź University of Technology, 90-924 Łódź, Poland
| | - Piotr Kaszyński
- Faculty of Chemistry, University of Łódź, 91-403 Łódź, Poland
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, 90-363 Łódź, Poland
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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41
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Evrard Q, Cucinotta G, Houard F, Calvez G, Suffren Y, Daiguebonne C, Guillou O, Caneschi A, Mannini M, Bernot K. Self-assembly of a terbium(III) 1D coordination polymer on mica. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:2440-2448. [PMID: 31921522 PMCID: PMC6941415 DOI: 10.3762/bjnano.10.234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
The terbium(III) ion is a particularly suitable candidate for the creation of surface-based magnetic and luminescent devices. In the present work, we report the epitaxial growth of needle-like objects composed of [Tb(hfac)3·2H2O] n (where hfac = hexafluoroacetylacetonate) polymeric units on muscovite mica, which is observed by atomic force microscopy. The needle-like shape mimics the structure observed in the crystalline bulk material. The growth of this molecular organization is assisted by water adsorption on the freshly air-cleaved muscovite mica. This deposition technique allows for the observation of a significant amount of nanochains grown along three preferential directions 60° apart from another. The magnetic properties and the luminescence of the nanochains can be detected without the need of surface-dedicated instrumentation. The intermediate value of the observed luminescence lifetime of the deposits (132 µs) compared to that of the bulk (375 µs) and the CHCl3 solution (13 µs) further reinforces the idea of water-induced growth.
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Affiliation(s)
- Quentin Evrard
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Giuseppe Cucinotta
- Laboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n. 3-13, Sesto Fiorentino (FI) I-50019, Italy
| | - Felix Houard
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Guillaume Calvez
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Yan Suffren
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Carole Daiguebonne
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Olivier Guillou
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
| | - Andrea Caneschi
- Dipartimento di Ingegneria Industriale - DIEF, Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via di Santa Marta n. 3, Firenze - 50139, Italy
| | - Matteo Mannini
- Laboratory for Molecular Magnetism (LA.M.M.), Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n. 3-13, Sesto Fiorentino (FI) I-50019, Italy
| | - Kevin Bernot
- Université de Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France
- Institut Universitaire de France (IUF), Ministère de l'Enseignement supérieur, de la Recherche et de l'Innovation, 1 rue Descartes, 75231 Paris Cedex 05, France
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42
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de Sousa JA, Bejarano F, Gutiérrez D, Leroux YR, Nowik-Boltyk EM, Junghoefer T, Giangrisostomi E, Ovsyannikov R, Casu MB, Veciana J, Mas-Torrent M, Fabre B, Rovira C, Crivillers N. Exploiting the versatile alkyne-based chemistry for expanding the applications of a stable triphenylmethyl organic radical on surfaces. Chem Sci 2019; 11:516-524. [PMID: 32190271 PMCID: PMC7067255 DOI: 10.1039/c9sc04499j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/19/2019] [Indexed: 12/11/2022] Open
Abstract
The incorporation of terminal alkynes into the chemical structure of persistent organic perchlorotriphenylmethyl (PTM) radicals provides new chemical tools to expand their potential applications. In this work, this is demonstrated by the chemical functionalization of two types of substrates, hydrogenated SiO2-free silicon (Si-H) and gold, and, by exploiting the click chemistry, scarcely used with organic radicals, to synthesise multifunctional systems. On one hand, the one-step functionalization of Si-H allows a light-triggered capacitance switch to be successfully achieved under electrochemical conditions. On the other hand, the click reaction between the alkyne-terminated PTM radical and a ferrocene azide derivative, used here as a model azide system, leads to a multistate electrochemical switch. The successful post-surface modification makes the self-assembled monolayers reported here an appealing platform to synthesise multifunctional systems grafted on surfaces.
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Affiliation(s)
- J Alejandro de Sousa
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain . .,Laboratorio de Electroquímica , Departamento de Química , Facultad de Ciencias , Universidad de los Andes , 5101 Mérida , Venezuela
| | - Francesc Bejarano
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
| | - Diego Gutiérrez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
| | - Yann R Leroux
- Univ Rennes , CNRS , ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , F-35000 Rennes , France
| | | | - Tobias Junghoefer
- Institute of Physical and Theoretical Chemistry , University of Tübingen , 72076 Tübingen , Germany
| | - Erika Giangrisostomi
- Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Str 15 , 12489 Berlin , Germany
| | - Ruslan Ovsyannikov
- Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) , Albert-Einstein-Str 15 , 12489 Berlin , Germany
| | - Maria Benedetta Casu
- Institute of Physical and Theoretical Chemistry , University of Tübingen , 72076 Tübingen , Germany
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
| | - Bruno Fabre
- Univ Rennes , CNRS , ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , F-35000 Rennes , France
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) , Networking Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-BBN) , Campus de la UAB , 08193 Bellaterra , Spain .
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43
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Ito H, Murata T, Miyata T, Morita M, Tsuji R, Morita Y. Air-Stable Thin Films with High and Anisotropic Electrical Conductivities Composed of a Carbon-Centered Neutral π-Radical. ACS OMEGA 2019; 4:17569-17575. [PMID: 31656931 PMCID: PMC6812104 DOI: 10.1021/acsomega.9b02700] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 09/26/2019] [Indexed: 05/20/2023]
Abstract
Air-stable thin films (50-720 nm thickness) composed of a carbon-centered neutral π-radical with high and anisotropic electrical conductivities were fabricated by vapor deposition of 4,8,12-trioxotriangulene (TOT). The thin films were air-stable over 15 months and were the aggregate of TOT microcrystals, in which a one-dimensional π-stacking column was formed through the strong singly occupied molecular orbital (SOMO)-SOMO interaction with two-electron-multicenter bond among the spin-delocalized π-planes. The orientations of the one-dimensional column of TOT were changed depending on the deposition rate and substrates, where face-on-oriented thin films were epitaxially grown on the graphite 0001 surface, and edge-on-oriented thin films were grown on glass, SiO2, and indium tin oxide substrates under a high-deposition rate condition. The films showed high electrical conductivities of 2.5 × 10-2 and 5.9 × 10-5 S cm-1 along and perpendicular to the π-stacking column, respectively, for an edge-on oriented thin film.
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Affiliation(s)
- Hiroshi Ito
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Tsuyoshi Murata
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Takahiro Miyata
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Miwa Morita
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Ryotaro Tsuji
- Material
Solutions New Research Engine, KANEKA Corporation, Suita, Osaka 565-0871, Japan
| | - Yasushi Morita
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
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44
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Guo H, Peng Q, Chen XK, Gu Q, Dong S, Evans EW, Gillett AJ, Ai X, Zhang M, Credgington D, Coropceanu V, Friend RH, Brédas JL, Li F. High stability and luminescence efficiency in donor-acceptor neutral radicals not following the Aufbau principle. NATURE MATERIALS 2019; 18:977-984. [PMID: 31332338 DOI: 10.1038/s41563-019-0433-1] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 06/13/2019] [Indexed: 06/10/2023]
Abstract
With their unusual electronic structures, organic radical molecules display luminescence properties potentially relevant to lighting applications; yet, their luminescence quantum yield and stability lag behind those of other organic emitters. Here, we designed donor-acceptor neutral radicals based on an electron-poor perchlorotriphenylmethyl or tris(2,4,6-trichlorophenyl)methyl radical moiety combined with different electron-rich groups. Experimental and quantum-chemical studies demonstrate that the molecules do not follow the Aufbau principle: the singly occupied molecular orbital is found to lie below the highest (doubly) occupied molecular orbital. These donor-acceptor radicals have a strong emission yield (up to 54%) and high photostability, with estimated half-lives reaching up to several months under pulsed ultraviolet laser irradiation. Organic light-emitting diodes based on such a radical emitter show deep-red/near-infrared emission with a maximal external quantum efficiency of 5.3%. Our results provide a simple molecular-design strategy for stable, highly luminescent radicals with non-Aufbau electronic structures.
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Affiliation(s)
- Haoqing Guo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
| | - Qiming Peng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, China
| | - Xian-Kai Chen
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, USA
| | - Qinying Gu
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Shengzhi Dong
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
| | - Emrys W Evans
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | | | - Xin Ai
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
| | - Ming Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
| | - Dan Credgington
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Veaceslav Coropceanu
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, USA
| | | | - Jean-Luc Brédas
- School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, USA.
| | - Feng Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China.
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
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45
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Soulignac C, Cornelio B, Brégier F, Le Derf F, Brière J, Clamens T, Lesouhaitier O, Estour F, Vieillard J. Heterogeneous-phase Sonogashira cross-coupling reaction on COC surface for the grafting of biomolecules – Application to isatin. Colloids Surf B Biointerfaces 2019; 181:639-647. [DOI: 10.1016/j.colsurfb.2019.06.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/29/2019] [Accepted: 06/01/2019] [Indexed: 01/28/2023]
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46
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Duffin TJ, Nerngchamnong N, Thompson D, Nijhuis CA. Direct measurement of the local field within alkyl-ferrocenyl-alkanethiolate monolayers: Importance of the supramolecular and electronic structure on the voltammetric response and potential profile. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.04.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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47
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Karthika C, Sarath Kumar SR, Kathuria L, Das PK, Samuelson AG. In situ reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes. Phys Chem Chem Phys 2019; 21:11079-11086. [PMID: 31093630 DOI: 10.1039/c9cp00946a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article we report the reversible redox switching of first hyperpolarizability of bimetallic ruthenium complexes bridged by bipyridyl tetrazine (bptz) ligands by second harmonic light scattering experiments (SHLS). We have synthesised [RuII(acac)2(CH3CN)2] and [(acac)2Ru-bptz-Ru(acac)2] complexes and measured their first hyperpolarizabilities as a function of in situ electrochemical oxidation/reduction of the metal centres. As a result of the oxidation of ruthenium centre from Ru(ii) to Ru(iii), the molecular hyperpolarizability of the complexes went up. The mixed-valence intermediate bimetallic complex and not the fully oxidized complex exhibit the highest β value of 780 × 10-30 esu. We also demonstrated that the hyperpolarizability is reversible with the change of the oxidation state of the metal and both the complexes are stable for several cycles of redox switching. The experimental results are also supported by calculations.
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Affiliation(s)
- C Karthika
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - S R Sarath Kumar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - L Kathuria
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - P K Das
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - A G Samuelson
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
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48
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Cao L, Yuan L, Yang M, Nerngchamnong N, Thompson D, Yu X, Qi DC, Nijhuis CA. The supramolecular structure and van der Waals interactions affect the electronic structure of ferrocenyl-alkanethiolate SAMs on gold and silver electrodes. NANOSCALE ADVANCES 2019; 1:1991-2002. [PMID: 36134247 PMCID: PMC9417838 DOI: 10.1039/c9na00107g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 03/20/2019] [Indexed: 06/12/2023]
Abstract
Understanding the influence of structural properties on the electronic structure will pave the way for optimization of charge transport properties of SAM devices. In this study, we systematically investigate the supramolecular and electronic structures of ferrocene (Fc) terminated alkanethiolate (SC n Fc) SAMs on both Au and Ag substrates with n = 1-15 by using a combination of synchrotron based near edge X-ray absorption spectroscopy (NEXAFS), photoemission spectroscopy (PES), and density functional theory (DFT) calculations. Odd-even effects in the supramolecular structure persist over the entire range of n = 1-15, which, in turn, explain the odd-even effects in the onset energy of the highest occupied molecular (HOMO) orbital. The orientation of the Fc moieties and the strength of Fc-substrate coupling, which both depend on n, affects the work function (WF). The variation of WF shows an odd-even effect in the weak electrode-Fc coupling regime for n ≥ 8, whereas the odd-even effect diminishes for n < 8 due to hybridization between Fc and the electrode (n < 3) or van der Waals (vdW) interactions between Fc and the electrode (n = 3-7). These results confirm that subtle changes in the supramolecular structure of the SAMs cause significant electronic changes that have a large influence on device properties.
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Affiliation(s)
- Liang Cao
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences 350 Shushanhu Road Hefei 230031 China
- Department of Physics, National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore
| | - Li Yuan
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Ming Yang
- Institute of Materials Research and Engineering (IMRE), Innovis 2 Fusionopolis Way Singapore 138634 Singapore
| | - Nisachol Nerngchamnong
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Damien Thompson
- Department of Physics, Bernal Institute, University of Limerick V94 T9PX Ireland
| | - Xiaojiang Yu
- Singapore Synchrotron Light Source, National University of Singapore 5 Research Link Singapore 117603 Singapore
| | - Dong-Chen Qi
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Brisbane Queensland 4001 Australia
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University Melbourne Victoria 3086 Australia
| | - Christian A Nijhuis
- Department of Chemistry, National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore
- NUSNNI-Nanocore, National University of Singapore Singapore 117411 Singapore
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49
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Bocquet M, Lorente N, Berndt R, Gruber M. Spin in a Closed‐Shell Organic Molecule on a Metal Substrate Generated by a Sigmatropic Reaction. Angew Chem Int Ed Engl 2019; 58:821-824. [PMID: 30422385 DOI: 10.1002/anie.201812121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Marie‐Laure Bocquet
- PASTEURDépartement de chimieÉcole normale supérieurePSL UniversitySorbonne UniversitéCNRS 75005 Paris France
| | - Nicolas Lorente
- Centro de Fısica de Materiales CFM/MPC (CSIC-UPV/EHU) Paseo Manuel de Lardizabal 5 20018 Donostia-San Sebastian Spain
- Donostia International Physics Center (DIPC) Paseo Manuel de Lardizabal 4 20018 Donostia-San Sebastian Spain
| | - Richard Berndt
- Institut für Experimentelle und Angewandte PhysikChristian-Albrechts-Universität 24098 Kiel Germany
| | - Manuel Gruber
- Institut für Experimentelle und Angewandte PhysikChristian-Albrechts-Universität 24098 Kiel Germany
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50
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Sil A, Ghosh U, Mishra VK, Mishra S, Patra SK. Synthesis, Structure, Electrochemical, and Spectroscopic Properties of Hetero-Bimetallic Ru(II)/Fe(II)-Alkynyl Organometallic Complexes. Inorg Chem 2019; 58:1155-1166. [PMID: 30614701 DOI: 10.1021/acs.inorgchem.8b02440] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amit Sil
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Utsav Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Vipin Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Sanjib K. Patra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
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