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Cahlík A, Ondráček M, Wäckerlin C, Solé AP, Siri O, Švec M, Jelínek P. Light-Controlled Multiconfigurational Conductance Switching in a Single 1D Metal-Organic Wire. ACS NANO 2024; 18:9576-9583. [PMID: 38518264 PMCID: PMC10993641 DOI: 10.1021/acsnano.3c12909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/10/2024] [Accepted: 03/14/2024] [Indexed: 03/24/2024]
Abstract
Precise control of multiple spin states on the atomic scale presents a promising avenue for designing and realizing magnetic switches. Despite substantial progress in recent decades, the challenge of achieving control over multiconfigurational reversible switches in low-dimensional nanostructures persists. Our work demonstrates multiple, fully reversible plasmon-driven spin-crossover switches in a single π-d metal-organic chain suspended between two electrodes. The plasmonic nanocavity stimulated by external visible light allows for reversible spin crossover between low- and high-spin states of different cobalt centers within the chain. We show that the distinct spin configurations remain stable for minutes under cryogenic conditions and can be nonperturbatively detected by conductance measurements. This multiconfigurational plasmon-driven spin-crossover demonstration extends the available toolset for designing optoelectrical molecular devices based on SCO compounds.
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Affiliation(s)
- Aleš Cahlík
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
- Department
of Physics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Martin Ondráček
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
| | - Christian Wäckerlin
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
- Institute
of Physics, École Polytechnique Fédérale de Lausanne
(EPFL), Station 3, CH-1015 Lausanne, Switzerland
- Laboratory
for X-ray Nanoscience and Technologies, Paul-Scherrer-Institut (PSI), CH-5232 Villigen, PSI, Switzerland
| | - Andres Pinar Solé
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
| | - Olivier Siri
- Aix
Marseille Université, CINaM UMR 7325 CNRS, Campus de Luminy, 13288 Marseille
cedex 09, France
| | - Martin Švec
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
| | - Pavel Jelínek
- Institute
of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic
- Regional
Centre of Advanced Technologies and Materials, Czech Advanced Technology
and Research Institute (CATRIN), Palacký
University Olomouc, 78371 Olomouc, Czech Republic
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Raithel AL, Meador WE, Kim TY, Staples RJ, Delcamp JH, Hamann TW. Molecular Switch Cobalt Redox Shuttle with a Tunable Hexadentate Ligand. J Am Chem Soc 2023; 145:1367-1377. [PMID: 36595559 DOI: 10.1021/jacs.2c12017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Strong-field hexadentate ligands were synthesized and coordinated to cobalt metal centers to result in three new low-spin to low-spin Co(III/II) redox couples. The ligand backbone has been modified with dimethyl amine groups to result in redox potential tuning of the Co(III/II) redox couples from -200 to -430 mV versus Fc+/0. The redox couples surprisingly undergo a reversible molecular switch rearrangement from five-coordinate Co(II) to six-coordinate Co(III) despite the ligands being hexadentate. The complexes exhibit modestly faster electron self-exchange rate constants of 2.2-4.2 M-1 s-1 compared to the high-spin to low-spin redox couple [Co(bpy)3]3+/2+ at 0.27 M-1 s-1, which is attributed to the change in spin state being somewhat offset by this coordination switching behavior. The complexes were utilized as redox shuttles in dye-sensitized solar cells with the near-IR AP25 + D35 dye system and exhibited improved photocurrents over the [Co(bpy)3]3+/2+ redox shuttle (19.8 vs 18.0 mA/cm2). Future directions point toward pairing the low-spin to low-spin Co(II/III) tunable series to dyes with significantly more negative highest occupied molecular orbital potentials that absorb into the near-IR where outer sphere redox shuttles have failed to produce efficient dye regeneration.
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Affiliation(s)
- Austin L Raithel
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan48823, United States
| | - William E Meador
- Department of Chemistry and Biochemistry, Coulter Hall, University of Mississippi, University, Mississippi38677, United States
| | - Tea-Yon Kim
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan48823, United States
| | - Richard J Staples
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan48823, United States
| | - Jared H Delcamp
- UES, Inc. Research Scientist, Air Force Research Labs, Materials and Manufacturing Directorate, 2230 Tenth Street B655 R198, WPAFB, Ohio45433-7817, United States
| | - Thomas W Hamann
- Department of Chemistry, Michigan State University, 578 S Shaw Lane, East Lansing, Michigan48823, United States
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Zhang J, Feng LC, Li SZ, Dong WK. Studies on two phenoxo-bridged homopolynuclear Cu(II) bis(salamo) type complexes based on theoretical calculations and fluorescence properties. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Li M, Zhu WH. Sterically Hindered Diarylethenes with a Benzobis(thiadiazole) Bridge: Enantiospecific Transformation and Reversible Photosuperstructures. Acc Chem Res 2022; 55:3136-3149. [PMID: 36260815 DOI: 10.1021/acs.accounts.2c00419] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
ConspectusPhotochromic diarylethenes featuring reversible regulation by external light irradiation have attracted increasing attention in versatile applications such as logic gates, supramolecular systems, liquid crystals, and super-resolution imaging because of their outstanding bistability and fatigue resistance. However, for typical diarylethene systems, there always exist three typical unsolved issues. The first is how to modulate the bistability between the open and closed forms from the viewpoint of ethene bridge aromaticity. The second is how to decrease and avoid the photoinactive parallel conformer in order to achieve a high quantum yield, since the open form possesses the photoactive antiparallel (ap) conformation and the photoinactive parallel (p) conformation. Because of the typical rapid rotation of the flexible side aryl groups, the two conformers cannot be separated efficiently, thereby resulting in a relatively low photocyclization quantum yield. The third is how to fulfill the enantiospecific transformation with reversibility to photomodulate the chirality. Stereochemically, the ap conformer with C2 symmetry can be further subdivided into a pair of enantiomers with P and M helicity originating from the central hexatriene moiety. Similarly, the rapid rotation can also lead to the loss of intrinsic chirality, restricting the development and application of light-driven chiroptical switches. Accordingly, it is desirable to construct a specific diarylethene system to break through these bottlenecks for real versatile applications.Our group has recently developed a unique sterically hindered diarylethene system based on benzobis(thiadiazole) as the ethene bridge for completely solving these issues. We introduce a low-aromaticity benzobis(thiadiazole) unit into the diarylethene as a central ethene bridge with incomparably high bistability. To block or freeze the rotation of flexible side aryls, we further incorporate a large bulky benzothiophene unit to induce a large steric hindrance, or rotation barrier, between the ethene bridge and side aryls, thereby successfully separating multiple conformers of the diarylethenes with high photocyclization quantum yields and enantiospecific photoreaction. Consequently, given such a fantastic building block, we enhance its performance by means of supramolecular self-assembly, thereby realizing unique conformer-dependent self-assembly as well as unprecedented concerted isomerization and enantiospecific photoreaction of photoresponsive metallacycles. In addition, decoration of the intrinsically chiral diarylethenes with mesogenic units can enable us to manipulate the helical superstructure of liquid crystals, thus achieving a multiple anticounterfeiting technique and a quadridimensional manipulable laser. We also unravel the dual aggregation-induced emission (AIE) behavior of the sterically hindered diarylethene, especially as applied in super-resolution imaging.
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Affiliation(s)
- Mengqi Li
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei-Hong Zhu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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Rogacz K, Brzozowska M, Baś S, Kurpiewska K, Pinkowicz D. Low-Coordinate Erbium(III) Single-Molecule Magnets with Photochromic Behavior. Inorg Chem 2022; 61:16295-16306. [PMID: 36197744 PMCID: PMC9580000 DOI: 10.1021/acs.inorgchem.2c01999] [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] [Indexed: 11/29/2022]
Abstract
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The structures and magnetic properties of photoresponsive
magnets
can be controlled or fine-tuned by visible light irradiation, which
makes them appealing as candidates for ternary memory devices: photochromic
and photomagnetic at the same time. One of the strategies for photoresponsive
magnetic systems is the use of photochromic/photoswitchable molecules
coordinated to paramagnetic metal centers to indirectly influence
their magnetic properties. Herein, we present two erbium(III)-based
coordination systems: a trinuclear molecule {[ErIII(BHT)3]3(dtepy)2}.4C5H12 (1) and a 1D coordination chain {[ErIII(BHT)3(azopy)}n·2C5H12 (2), where the bridging photochromic
ligands belong to the class of diarylethenes: 1,2-bis((2-methyl-5-pyridyl)thie-3-yl)perfluorocyclopentene
(dtepy) and 4,4′-azopyridine (azopy), respectively (BHT = 2,6-di-tert-butyl-4-methylphenolate). Both compounds show slow
dynamics of magnetization, typical for single-molecule magnets (SMMs)
as revealed by alternating current (AC) magnetic susceptibility measurements.
The trinuclear compound 1 also shows an immediate color
change from yellow to dark blue in response to near-UV irradiation.
Such behavior is typical for the photoisomerization of the open form
of the ligand into its closed form. The color change can be reversed
by exposing the closed form to visible light. The chain-like compound 2, on the other hand, does not show significant signs of the
expected trans–cis photoisomerization
of the azopyridine in response to UV irradiation and does not appear
to show photoswitching behavior. Three-coordinate
[ErIII(BHT)3] single
ion magnets undergo ligand addition reaction in pentane to form linear
trinuclear photochromic nanomagnets where both functionalities persist.
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Affiliation(s)
- Katarzyna Rogacz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Maria Brzozowska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Sebastian Baś
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Katarzyna Kurpiewska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
| | - Dawid Pinkowicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387Kraków, Poland
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Li SZ, Wei YX, Huang Y, Dong WK. Counteranion-driven self-assembly of di- and tetra-nuclear Zn(II) single‐armed salamo‐type complexes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133473] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li SZ, Tong L, Li X, Dong WK. New insight into two penta-coordinated multinuclear copper(II) single-armed salamo-based complexes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121047] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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The selective deposition of Fe species inside ZSM-5 for the oxidation of cyclohexane to cyclohexanone. Sci China Chem 2021. [DOI: 10.1007/s11426-020-9968-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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