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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Salta J, Benhamou RI, Herzog IM, Fridman M. Tuning the Effects of Bacterial Membrane Permeability through Photo-Isomerization of Antimicrobial Cationic Amphiphiles. Chemistry 2017; 23:12724-12728. [PMID: 28727190 DOI: 10.1002/chem.201703010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Indexed: 11/08/2022]
Abstract
Several important antimicrobial drugs act by permeabilizing cell membranes. In this study, we showed that the intensity of membrane permeability caused by antimicrobial cationic amphiphiles can be modified not only by their concentration but also through light-induced isomerization of their lipid segment. Two types of photo-isomerizable cationic amphiphiles were developed and the effects of photo-isomerization on bacterial growth and membrane permeability were evaluated. One photo-isomer inhibited cell growth and division, whereas the other photo-isomer led to a rapid and lethal bacterial membrane-disrupting effect. The switch from "on" to "off" can be obtained by either the cis- or trans-isomer depending on the bacterial strain and the type of cationic amphiphile. These cationic amphiphiles offer a novel tool for research and industrial applications that require light-controlled bacterial membrane permeabilization.
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Affiliation(s)
- Joana Salta
- School of Chemistry, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel
| | - Raphael I Benhamou
- School of Chemistry, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel
| | - Ido M Herzog
- School of Chemistry, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel
| | - Micha Fridman
- School of Chemistry, Raymond & Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, 6997801, Israel
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