1
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Regueiro A, Martí-Carrascosa M, Torres-Cavanillas R, Coronado E. Unlocking room-temperature bistable spin transition at the nanoscale: the synthesis of core@shell [Fe(NH 2trz) 3(NO 3) 2]@SiO 2 nanoparticles. Dalton Trans 2024; 53:8764-8771. [PMID: 38712733 DOI: 10.1039/d4dt00911h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
In this work, we address the synthesis of stable spin-crossover nanoparticles capable of undergoing a hysteretic spin transition at room temperature. For this purpose, we use the reverse-micelle protocol to prepare naked [Fe(NH2trz)3](NO3)2 and core@shell [Fe(NH2trz)3](NO3)2@SiO2 nanoparticles. Through meticulous adjustment of synthetic parameters, we achieved nanoparticle sizes ranging from approximately 40 nm to 60 nm. Our findings highlight that [Fe(NH2trz)3](NO3)2 presents a modest thermal hysteresis of 7 K, which decreases by downsizing. Conversely, silica-coated nanoparticles with sizes of ca. 60 and 40 nm demonstrate a remarkable hysteretic response of approximately 30 K, switching their spin state around room temperature. Moreover, the presence of a SiO2 shell substantially enhances the nanoparticles' stability against oxidation. In this context, the larger 60 nm [Fe(NH2trz)3](NO3)2@SiO2 hybrid remains stable in water for up to two hours, enabling the observation of an unreported water-induced spin transition after 30 min. Therefore, this work also introduces an intriguing avenue for inducing spin transitions through solvent exchange, underscoring the versatility and potential of these nanoparticles.
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Affiliation(s)
- A Regueiro
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain.
| | - M Martí-Carrascosa
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain.
- Universitat Politecnica de Valencia, Nanophotonics Technology Center, Valencia, Spain
| | - R Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain.
- Department of Materials, Oxford University, 21 Banbury Rd, Oxford OX2 6NN, UK.
| | - E Coronado
- Department of Materials, Oxford University, 21 Banbury Rd, Oxford OX2 6NN, UK.
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2
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Zakrzewski J, Liberka M, Wang J, Chorazy S, Ohkoshi SI. Optical Phenomena in Molecule-Based Magnetic Materials. Chem Rev 2024; 124:5930-6050. [PMID: 38687182 PMCID: PMC11082909 DOI: 10.1021/acs.chemrev.3c00840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Since the last century, we have witnessed the development of molecular magnetism which deals with magnetic materials based on molecular species, i.e., organic radicals and metal complexes. Among them, the broadest attention was devoted to molecule-based ferro-/ferrimagnets, spin transition materials, including those exploring electron transfer, molecular nanomagnets, such as single-molecule magnets (SMMs), molecular qubits, and stimuli-responsive magnetic materials. Their physical properties open the application horizons in sensors, data storage, spintronics, and quantum computation. It was found that various optical phenomena, such as thermochromism, photoswitching of magnetic and optical characteristics, luminescence, nonlinear optical and chiroptical effects, as well as optical responsivity to external stimuli, can be implemented into molecule-based magnetic materials. Moreover, the fruitful interactions of these optical effects with magnetism in molecule-based materials can provide new physical cross-effects and multifunctionality, enriching the applications in optical, electronic, and magnetic devices. This Review aims to show the scope of optical phenomena generated in molecule-based magnetic materials, including the recent advances in such areas as high-temperature photomagnetism, optical thermometry utilizing SMMs, optical addressability of molecular qubits, magneto-chiral dichroism, and opto-magneto-electric multifunctionality. These findings are discussed in the context of the types of optical phenomena accessible for various classes of molecule-based magnetic materials.
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Affiliation(s)
- Jakub
J. Zakrzewski
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Michal Liberka
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
- Doctoral
School of Exact and Natural Sciences, Jagiellonian
University, Lojasiewicza
11, 30-348 Krakow, Poland
| | - Junhao Wang
- Department
of Materials Science, Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1 Tonnodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Szymon Chorazy
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Shin-ichi Ohkoshi
- Department
of Chemistry, School of Science, The University
of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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3
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Torres-Cavanillas R, Gavara-Edo M, Coronado E. Bistable Spin-Crossover Nanoparticles for Molecular Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307718. [PMID: 37725707 DOI: 10.1002/adma.202307718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/25/2023] [Indexed: 09/21/2023]
Abstract
The field of spin-crossover complexes is rapidly evolving from the study of the spin transition phenomenon to its exploitation in molecular electronics. Such spin transition is gradual in a single-molecule, while in bulk it can be abrupt, showing sometimes thermal hysteresis and thus a memory effect. A convenient way to keep this bistability while reducing the size of the spin-crossover material is to process it as nanoparticles (NPs). Here, the most recent advances in the chemical design of these NPs and their integration into electronic devices, paying particular attention to optimizing the switching ratio are reviewed. Then, integrating spin-crossover NPs over 2D materials is focused to improve the endurance, performance, and detection of the spin state in these hybrid devices.
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Affiliation(s)
- Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
- Department of Materials, Oxford University, Oxford, OX2 6NN, UK
| | - Miguel Gavara-Edo
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Valencia, 46980, Spain
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4
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Lamichhane S, McElveen KA, Erickson A, Fescenko I, Sun S, Timalsina R, Guo Y, Liou SH, Lai RY, Laraoui A. Nitrogen-Vacancy Magnetometry of Individual Fe-Triazole Spin Crossover Nanorods. ACS NANO 2023; 17:8694-8704. [PMID: 37093121 DOI: 10.1021/acsnano.3c01819] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
[Fe(Htrz)2(trz)](BF4) (Fe-triazole) spin crossover molecules show thermal, electrical, and optical switching between high spin (HS) and low spin (LS) states, making them promising candidates for molecular spintronics. The LS and HS transitions originate from the electronic configurations of Fe(II) and are considered to be diamagnetic and paramagnetic, respectively. The Fe(II) LS state has six paired electrons in the ground states with no interaction with the magnetic field and a diamagnetic behavior is usually observed. While the bulk magnetic properties of Fe-triazole compounds are widely studied by standard magnetometry techniques, their magnetic properties at the individual level are missing. Here we use nitrogen vacancy (NV) based magnetometry to study the magnetic properties of the Fe-triazole LS state of nanoparticle clusters and individual nanorods of size varying from 20 to 1000 nm. Scanning electron microscopy (SEM) and Raman spectroscopy are performed to determine the size of the nanoparticles/nanorods and to confirm their respective spin states. The magnetic field patterns produced by the nanoparticles/nanorods are imaged by NV magnetic microscopy as a function of applied magnetic field (up to 350 mT) and correlated with SEM and Raman. We found that in most of the nanorods the LS state is slightly paramagnetic, possibly originating from the surface oxidation and/or the greater Fe(III) presence along the nanorods' edges. NV measurements on the Fe-triazole LS state nanoparticle clusters revealed both diamagnetic and paramagnetic behavior. Our results highlight the potential of NV quantum sensors to study the magnetic properties of spin crossover molecules and molecular magnets.
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Affiliation(s)
- Suvechhya Lamichhane
- Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, 855 North 16th Street, Lincoln, Nebraska 68588, United States
| | - Kayleigh A McElveen
- Department of Chemistry, University of Nebraska-Lincoln, 639 N 12 Street, 651 Hamilton Hall, Lincoln, Nebraska 68588, United States
| | - Adam Erickson
- Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, 900 North 16th Street, West Nebraska Hall 342, Lincoln, Nebraska 68588, United States
| | - Ilja Fescenko
- Laser Center, University of Latvia, Jelgavas St 3, Riga LV-1004, Latvia
| | - Shuo Sun
- Department of Chemistry, University of Nebraska-Lincoln, 639 N 12 Street, 651 Hamilton Hall, Lincoln, Nebraska 68588, United States
| | - Rupak Timalsina
- Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, 900 North 16th Street, West Nebraska Hall 342, Lincoln, Nebraska 68588, United States
| | - Yinsheng Guo
- Department of Chemistry, University of Nebraska-Lincoln, 639 N 12 Street, 651 Hamilton Hall, Lincoln, Nebraska 68588, United States
| | - Sy-Hwang Liou
- Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, 855 North 16th Street, Lincoln, Nebraska 68588, United States
| | - Rebecca Y Lai
- Department of Chemistry, University of Nebraska-Lincoln, 639 N 12 Street, 651 Hamilton Hall, Lincoln, Nebraska 68588, United States
| | - Abdelghani Laraoui
- Department of Physics and Astronomy and the Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, 855 North 16th Street, Lincoln, Nebraska 68588, United States
- Department of Mechanical & Materials Engineering, University of Nebraska-Lincoln, 900 North 16th Street, West Nebraska Hall 342, Lincoln, Nebraska 68588, United States
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5
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Liu Y, Zhu S, Fan J, Guo W, Min Y, Jiang X, Li J. Photo-Cross-Linked Polymeric Dispersants of Comb-Shaped Benzophenone-Containing Poly(ether amine). ACS APPLIED MATERIALS & INTERFACES 2023; 15:19470-19479. [PMID: 37023404 DOI: 10.1021/acsami.3c02395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Efficient dispersion of nanoparticles (NPs) is a crucial challenge in the preparation and application of composites that contain NPs, particularly in coatings, inks, and related materials. Physical adsorption and chemical modification are the two common methods used to disperse NPs. However, the former suffers from desorption, and the latter is more specific and has limited versatility. To address these issues, we developed a novel photo-cross-linked polymeric dispersant, comb-shaped benzophenone-containing poly(ether amine) (bPEA), using a one-pot nucleophilic/cyclic-opening addition reaction. The results demonstrated that the bPEA dispersant forms a dense and stable shell on the surface of pigment NPs through physical adsorption and subsequent chemical photo-cross-linking, which effectively overcome the drawbacks of the desorption occurred in physical adsorption and the specificity of the chemical modification. By means of the dispersing effect of bPEA, the obtained pigment dispersions show high solvent, thermal, and pH stability without flocculation during storage. Moreover, the NPs dispersants show good compatibility with screen printing, coating, and 3D printing, endowing the ornamental products with high uniformity, color fastness, and less color shading. These properties make bPEA dispersants ideal candidates in fabrication dispersions of other NPs.
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Affiliation(s)
- Yanchi Liu
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shanfeng Zhu
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jinchen Fan
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Wenyao Guo
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Yulin Min
- Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Xuesong Jiang
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jin Li
- School of Chemistry & Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, China
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6
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Sanchis-Gual R, Coronado-Puchau M, Mallah T, Coronado E. Hybrid nanostructures based on gold nanoparticles and functional coordination polymers: Chemistry, physics and applications in biomedicine, catalysis and magnetism. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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7
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Zhu HL, Lei YR, Meng YS, Liu T, Oshio H. A Cyanide-bridged FeII–MoV-based Coordination Polymer Showing Spin Crossover. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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Gavara-Edo M, Córdoba R, Valverde-Muñoz FJ, Herrero-Martín J, Real JA, Coronado E. Electrical Sensing of the Thermal and Light-Induced Spin Transition in Robust Contactless Spin-Crossover/Graphene Hybrid Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2202551. [PMID: 35766419 DOI: 10.1002/adma.202202551] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Hybrid devices based on spin-crossover (SCO)/2D heterostructures grant a highly sensitive platform to detect the spin transition in the molecular SCO component and tune the properties of the 2D material. However, the fragility of the SCO materials upon thermal treatment, light irradiation, or contact with surfaces and the methodologies used for their processing have limited their applicability. Here, an easily processable and robust SCO/2D hybrid device with outstanding performance based on the sublimable SCO [Fe(Pyrz)2 ] molecule deposited over chemical vapor deposition (CVD) graphene is reported, which is fully compatible with electronics industry protocols. Thus, a novel methodology based on growing an elusive polymorph of [Fe(Pyrz)2 ] (tetragonal phase) over graphene is developed that allows a fast and effective light-induced spin transition in the devices (≈50% yield in 5 min) to be detected electrically. Such performance can be enhanced even more when a flexible polymeric layer of poly(methyl methacrylate) is inserted in between the two active components in a contactless configuration, reaching a ≈100% yield in 5 min.
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Affiliation(s)
- Miguel Gavara-Edo
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Rosa Córdoba
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | | | | | - José Antonio Real
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
| | - Eugenio Coronado
- Institute of Molecular Science, University of Valencia, Catedrático José Beltrán 2, Paterna, 46980, Spain
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9
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Göbel C, Marquardt K, Baabe D, Drechsler M, Loch P, Breu J, Greiner A, Schmalz H, Weber B. Realizing shape and size control for the synthesis of coordination polymer nanoparticles templated by diblock copolymer micelles. NANOSCALE 2022; 14:3131-3147. [PMID: 35142327 DOI: 10.1039/d1nr07743k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The combination of polymers with nanoparticles offers the possibility to obtain customizable composite materials with additional properties such as sensing or bistability provided by a switchable spin crossover (SCO) core. For all applications, a precise control over size and shape of the nanomaterial is highly important as it will significantly influence its final properties. By confined synthesis of iron(II) SCO coordination polymers within the P4VP cores of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) micelles in THF we are able to control the size and also the shape of the resulting SCO nanocomposite particles by the composition of the PS-b-P4VP diblock copolymers (dBCPs) and the amount of complex employed. For the nanocomposite samples with the highest P4VP content, a morphological transition from spherical nanoparticles to worm-like structures was observed with increasing coordination polymer content, which can be explained with the impact of complex coordination on the self-assembly of the dBCP. Furthermore, the SCO nanocomposites showed transition temperatures of T1/2 = 217 K, up to 27 K wide hysteresis loops and a decrease of the residual high-spin fraction down to γHS = 14% in the worm-like structures, as determined by magnetic susceptibility measurements and Mössbauer spectroscopy. Thus, SCO properties close or even better (hysteresis) to those of the bulk material can be obtained and furthermore tuned through size and shape control realized by tailoring the block length ratio of the PS-b-P4VP dBCPs.
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Affiliation(s)
- Christoph Göbel
- Department of Chemistry, Inorganic Chemistry IV, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany.
| | - Katharina Marquardt
- Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Dirk Baabe
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Markus Drechsler
- Bavarian Polymer Institute (BPI), Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Patrick Loch
- Department of Chemistry, Inorganic Chemistry I, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Josef Breu
- Department of Chemistry, Inorganic Chemistry I, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Andreas Greiner
- Department of Chemistry, Macromolecular Chemistry II and Bavarian Polymer Institute (BPI), Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Holger Schmalz
- Department of Chemistry, Macromolecular Chemistry II and Bavarian Polymer Institute (BPI), Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
| | - Birgit Weber
- Department of Chemistry, Inorganic Chemistry IV, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany.
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10
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Blanco AA, Adams DJ, Azoulay JD, Spinu L, Wiley JB. Synthesis and Characterization of [Fe(Htrz) 2(trz)](BF 4)] Nanocubes. Molecules 2022; 27:1213. [PMID: 35209000 PMCID: PMC8874602 DOI: 10.3390/molecules27041213] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/03/2022] [Accepted: 02/05/2022] [Indexed: 11/16/2022] Open
Abstract
Compounds that exhibit spin-crossover (SCO) type behavior have been extensively investigated due to their ability to act as molecular switches. Depending on the coordinating ligand, in this case 1H-1,2,4-triazole, and the crystallite size of the SCO compound produced, the energy requirement for the spin state transition can vary. Here, SCO [Fe(Htrz)2(trz)](BF4)] nanoparticles were synthesized using modified reverse micelle methods. Reaction conditions and reagent ratios are strictly controlled to produce nanocubes of 40-50 nm in size. Decreases in energy requirements are seen in both thermal and magnetic transitions for the smaller sized crystallites, where, compared to bulk materials, a decrease of as much as 20 °C can be seen in low to high spin state transitions.
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Affiliation(s)
- Alexis A. Blanco
- Departments of Chemistry and Physics, Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148, USA; (A.A.B.); (L.S.)
| | - Daniel J. Adams
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS 39406, USA; (D.J.A.); (J.D.A.)
| | - Jason D. Azoulay
- School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS 39406, USA; (D.J.A.); (J.D.A.)
| | - Leonard Spinu
- Departments of Chemistry and Physics, Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148, USA; (A.A.B.); (L.S.)
| | - John B. Wiley
- Departments of Chemistry and Physics, Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148, USA; (A.A.B.); (L.S.)
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11
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Xie K, Ruan Z, Lyu B, Chen X, Zhang X, Huang G, Chen Y, Ni Z, Tong M. Guest‐Driven Light‐Induced Spin Change in an Azobenzene Loaded Metal–Organic Framework. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202113294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kai‐Ping Xie
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Ze‐Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Bang‐Heng Lyu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Xiao‐Xian Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Xue‐Wen Zhang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Guo‐Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yan‐Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Zhao‐Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Ming‐Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
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12
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Hu Y, Picher M, Tran NM, Palluel M, Stoleriu L, Daro N, Mornet S, Enachescu C, Freysz E, Banhart F, Chastanet G. Photo-Thermal Switching of Individual Plasmonically Activated Spin Crossover Nanoparticle Imaged by Ultrafast Transmission Electron Microscopy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2105586. [PMID: 34601766 DOI: 10.1002/adma.202105586] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Spin crossover (SCO) is a promising switching phenomenon when implemented in electronic devices as molecules, thin films or nanoparticles. Among the properties modulated along this phenomenon, optically induced mechanical changes are of tremendous importance as they can work as fast light-induced mechanical switches or allow to investigate and control microstructural strains and fatigability. The development of characterization techniques probing nanoscopic behavior with high spatio-temporal resolution allows to trigger and visualize such mechanical changes of individual nanoscopic objects. Here, ultrafast transmission electron microscopy (UTEM) is used to precisely probe the length changes of individual switchable nanoparticles induced thermally by nanosecond laser pulses. This allows revealing of the mechanisms of spin switching, leading to the macroscopic expansion of SCO materials. This study is conducted on individual pure SCO nanoparticles and SCO nanoparticles encapsulating gold nanorods that serve for plasmonic heating under laser pulses. Length changes are compared with time-resolved optical measurements performed on an assembly of these particles.
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Affiliation(s)
- Yaowei Hu
- Institut de Physique et Chimie des Matériaux, UMR 7504 CNRS, Université de Strasbourg, Strasbourg, F-67034, France
| | - Matthieu Picher
- Institut de Physique et Chimie des Matériaux, UMR 7504 CNRS, Université de Strasbourg, Strasbourg, F-67034, France
| | - Ngoc Minh Tran
- Universite de Bordeaux, CNRS, UMR 5798, LOMA, 358 Cours de la libération, Talence cedex, F-33405, France
| | - Marlène Palluel
- Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, Université de Bordeaux, Bordeaux INP, UMR 5026, Pessac, F-33600, France
| | - Laurentiu Stoleriu
- Faculty of Physics, Alexandru Ioan Cuza University, Iasi, 700506, Romania
| | - Nathalie Daro
- Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, Université de Bordeaux, Bordeaux INP, UMR 5026, Pessac, F-33600, France
| | - Stephane Mornet
- Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, Université de Bordeaux, Bordeaux INP, UMR 5026, Pessac, F-33600, France
| | - Cristian Enachescu
- Faculty of Physics, Alexandru Ioan Cuza University, Iasi, 700506, Romania
| | - Eric Freysz
- Universite de Bordeaux, CNRS, UMR 5798, LOMA, 358 Cours de la libération, Talence cedex, F-33405, France
| | - Florian Banhart
- Institut de Physique et Chimie des Matériaux, UMR 7504 CNRS, Université de Strasbourg, Strasbourg, F-67034, France
| | - Guillaume Chastanet
- Institut de Chimie de la Matière Condensée de Bordeaux, CNRS, Université de Bordeaux, Bordeaux INP, UMR 5026, Pessac, F-33600, France
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13
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Xie KP, Ruan ZY, Lyu BH, Chen XX, Zhang XW, Huang GZ, Chen YC, Ni ZP, Tong ML. Guest-Driven Light-Induced Spin Change in an Azobenzene Loaded Metal-Organic Framework. Angew Chem Int Ed Engl 2021; 60:27144-27150. [PMID: 34676638 DOI: 10.1002/anie.202113294] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Indexed: 12/30/2022]
Abstract
Stimuli-responsive materials that can be reversibly switched by light are of immense interest. Among them, photo-responsive spin crossover (SCO) complexes have great promises to combine the photoactive inputs with multifaceted outputs into switchable materials and devices. However, the reversible control the spin-state change by photochromic guests is still challenging. Herein, we report an unprecedented guest-driven light-induced spin change (GD-LISC) in a Hofmann-type metal-organic framework (MOF), [Fe(bpn){Ag(CN)2 }2 ]⋅azobenzene. (1, bpn=1,4-bis(4-pyridyl)naphthalene). The reversible trans-cis photoisomerization of azobenzene guest upon UV/Vis irradiation in the solid-state results in the remarkable magnetic changes in a wide temperature range of 10-180 K. This finding not only establishes a new switching mechanism for SCO complexes, but also paves the way toward the development of new generation of photo-responsive magnetic materials.
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Affiliation(s)
- Kai-Ping Xie
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Ze-Yu Ruan
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Bang-Heng Lyu
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Xiao-Xian Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Xue-Wen Zhang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Guo-Zhang Huang
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Yan-Cong Chen
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Zhao-Ping Ni
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
| | - Ming-Liang Tong
- Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, P. R. China
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14
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Torres-Cavanillas R, Morant-Giner M, Escorcia-Ariza G, Dugay J, Canet-Ferrer J, Tatay S, Cardona-Serra S, Giménez-Marqués M, Galbiati M, Forment-Aliaga A, Coronado E. Spin-crossover nanoparticles anchored on MoS 2 layers for heterostructures with tunable strain driven by thermal or light-induced spin switching. Nat Chem 2021; 13:1101-1109. [PMID: 34621077 DOI: 10.1038/s41557-021-00795-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 08/11/2021] [Indexed: 11/09/2022]
Abstract
In the past few years, the effect of strain on the optical and electronic properties of MoS2 layers has attracted particular attention as it can improve the performance of optoelectronic and spintronic devices. Although several approaches have been explored, strain is typically externally applied on the two-dimensional material. In this work, we describe the preparation of a reversible 'self-strainable' system in which the strain is generated at the molecular level by one component of a MoS2-based composite material. Spin-crossover nanoparticles were covalently grafted onto functionalized layers of semiconducting MoS2 to form a hybrid heterostructure. Their ability to switch between two spin states on applying an external stimulus (light irradiation or temperature change) serves to generate strain over the MoS2 layer. A volume change accompanies this spin crossover, and the created strain induces a substantial and reversible change of the electrical and optical properties of the heterostructure.
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Affiliation(s)
| | - Marc Morant-Giner
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Julien Dugay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | - Sergio Tatay
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | | | - Marta Galbiati
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain
| | | | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Paterna, Spain.
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15
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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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16
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Sanchis-Gual R, Otero TF, Coronado-Puchau M, Coronado E. Enhancing the electrocatalytic activity and stability of Prussian blue analogues by increasing their electroactive sites through the introduction of Au nanoparticles. NANOSCALE 2021; 13:12676-12686. [PMID: 34477618 DOI: 10.1039/d1nr02928b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Prussian blue analogues (PBAs) have been proven as excellent Earth-abundant electrocatalysts for the oxygen evolution reaction (OER) in acidic, neutral and alkaline media. Further improvements can be achieved by increasing their electrical conductivity, but scarce attention has been paid to quantify the electroactive sites of the electrocatalyst when this enhancement occurs. In this work, we have studied how the chemical design influences the specific density of electroactive sites in different Au-PBA nanostructures. Thus, we have first obtained and fully characterized a variety of monodisperse core@shell hybrid nanoparticles of Au@PBA (PBA of NiIIFeII and CoIIFeII) with different shell sizes. Their catalytic activity is evaluated by studying the OER, which is compared to pristine PBAs and other Au-PBA heterostructures. By using the coulovoltammetric technique, we have demonstrated that the introduction of 5-10% of Au in weight in the core@shell leads to an increase in the electroactive mass and thus, to a higher density of active sites capable of taking part in the OER. This increase leads to a significant decrease in the onset potential (up to 100 mV) and an increase (up to 420%) in the current density recorded at an overpotential of 350 mV. However, the Tafel slope remains unchanged, suggesting that Au reduces the limiting potential of the catalyst with no variation in the reaction kinetics. These improvements are not observed in other Au-PBA nanostructures mainly due to a lower contact between both compounds and the Au oxidation. Hence, an Au core activates the PBA shell and increases the conductivity of the resulting hybrid, while the PBA shell prevents Au oxidation. The strong synergistic effect existing in the core@shell structure evidences the importance of the chemical design for preparing PBA-based nanostructures exhibiting better electrocatalytic performances and higher electrochemical stabilities.
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Affiliation(s)
- Roger Sanchis-Gual
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltran 2, 46980, Paterna, Spain.
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17
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Sugiyarto KH, Onggo D, Akutsu H, Reddy VR, Sutrisno H, Nakazawa Y, Bhattacharjee A. Structural, magnetic and Mössbauer spectroscopic studies of the [Fe(3-bpp) 2](CF 3COO) 2 complex: role of crystal packing leading to an incomplete Fe( ii) high spin ⇋ low spin transition. CrystEngComm 2021. [DOI: 10.1039/d0ce01687j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mononuclear complex [Fe(3-bpp)2](CF3COO)2 exhibits a thermal (HS + HS) ⇋ (HS + LS) transition at ∼226 K which is not associated with any crystallographic transition.
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Affiliation(s)
| | - Djulia Onggo
- Inorganic and Physical Chemistry Research Division
- Institut Teknologi
- Bandung
- Indonesia
| | - Hiroki Akutsu
- Graduate School of Science
- Osaka University
- Osaka
- Japan
| | | | - Hari Sutrisno
- Department of Chemistry Education
- Yogyakarta State University
- Indonesia
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18
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Palacios-Corella M, Ramos-Soriano J, Souto M, Ananias D, Calbo J, Ortí E, Illescas BM, Clemente-León M, Martín N, Coronado E. Hexakis-adducts of [60]fullerene as molecular scaffolds of polynuclear spin-crossover molecules. Chem Sci 2020; 12:757-766. [PMID: 34163809 PMCID: PMC8178998 DOI: 10.1039/d0sc05875k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A family of hexakis-substituted [60]fullerene adducts endowed with the well-known tridentate 2,6-bis(pyrazol-1-yl)pyridine (bpp) ligand for spin-crossover (SCO) systems has been designed and synthesized. It has been experimentally and theoretically demonstrated that these molecular scaffolds are able to form polynuclear SCO complexes in solution. UV-vis and fluorescence spectroscopy studies have allowed monitoring of the formation of up to six Fe(ii)–bpp SCO complexes. In addition, DFT calculations have been performed to model the different complexation environments and simulate their electronic properties. The complexes retain SCO properties in the solid state exhibiting both thermal- and photoinduced spin transitions, as confirmed by temperature-dependent magnetic susceptibility and Raman spectroscopy measurements. The synthesis of these complexes demonstrates that [60]fullerene hexakis-adducts are excellent and versatile platforms to develop polynuclear SCO systems in which a fullerene core is surrounded by a SCO molecular shell. Polynuclear spin-crossover molecules showing both thermal and photoinduced spin transitions have been prepared using a [60]fullerene hexakis-adduct endowed with Fe(ii) complexes of tridentate 2,6-bis(pyrazol-1-yl)pyridine (bpp) ligand.![]()
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Affiliation(s)
- Mario Palacios-Corella
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain
| | - Javier Ramos-Soriano
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense 28040 Madrid Spain
| | - Manuel Souto
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain .,CICECO-Aveiro Institute of Materials, Department of Chemistry, Universidade de Aveiro Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - Duarte Ananias
- CICECO-Aveiro Institute of Materials, Department of Chemistry, Universidade de Aveiro Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - Joaquín Calbo
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain
| | - Beatriz M Illescas
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense 28040 Madrid Spain
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain
| | - Nazario Martín
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense 28040 Madrid Spain.,IMDEA-Nanoscience C/Faraday 9, Campus de Cantoblanco 28049 Madrid Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Catedrático José Beltrán 2 46980 Paterna Spain
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19
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Liu S, Zhou K, Yuan T, Lei W, Chen HY, Wang X, Wang W. Imaging the Thermal Hysteresis of Single Spin-Crossover Nanoparticles. J Am Chem Soc 2020; 142:15852-15859. [DOI: 10.1021/jacs.0c05951] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shasha Liu
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Kai Zhou
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Tinglian Yuan
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Wenrui Lei
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Xinyi Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Wei Wang
- State Key Laboratory of Analytical Chemistry for Life Science, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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20
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Anomalous Pressure Effects on the Electrical Conductivity of the Spin Crossover Complex [Fe(pyrazine){Au(CN)2}2]. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6030031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We studied the spin-state dependence of the electrical conductivity of two nanocrystalline powder samples of the spin crossover complex [Fe(pyrazine){Au(CN)2}2]. By applying an external pressure (up to 3 kbar), we were able to tune the charge transport properties of the material from a more conductive low spin state to a crossover point toward a more conductive high spin state. We rationalize these results by taking into account the spin-state dependence of the activation parameters of the conductivity.
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21
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Iglesias S, Gamonal A, Abudulimu A, Picón A, Carrasco E, Écija D, Liu C, Luer L, Zhang X, Costa JS, Moonshiram D. Tracking the Light-Induced Excited-State Dynamics and Structural Configurations of an Extraordinarily Long-Lived Metastable State at Room Temperature. Chemistry 2020; 26:10801-10810. [PMID: 32452581 DOI: 10.1002/chem.202001393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/22/2020] [Indexed: 11/11/2022]
Abstract
Time-resolved X-ray (Tr-XAS) and optical transient absorption (OTA) spectroscopy on the pico-microsecond timescale coupled with density functional theory calculations are applied to study the light-induced spin crossover processes of a Fe-based macrocyclic complex in solution. Tr-XAS analysis after light illumination shows the formation of a seven-coordinated high-spin quintet metastable state, which relaxes to a six-coordinated high-spin configuration before decaying to the ground state. Kinetic analysis of the macrocyclic complex reveals an unprecedented long-lived decay lifetime of approximately 42.6 μs. Comparative studies with a non-macrocyclic counterpart illustrate a significantly shortened approximately 568-fold decay lifetime of about 75 ns, and highlight the importance of the ligand arrangement in stabilizing the reactivity of the excited state. Lastly, OTA analysis shows the seven-coordinated high-spin state to be formed within approximately 6.2 ps. These findings provide a complete understanding of the spin crossover reaction and relaxation pathways of the macrocyclic complex, and reveal the importance of a flexible coordination environment for their rational design.
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Affiliation(s)
- Sirma Iglesias
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Arturo Gamonal
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Abasi Abudulimu
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Antonio Picón
- Departamento de Química, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Esther Carrasco
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - David Écija
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Cunming Liu
- X-ray Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL, 60439, USA
| | - Larry Luer
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain.,Institute of Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander University Erlangen-Nürnberg, Martensstraße 7, 91058, Erlangen, Germany
| | - Xiaoyi Zhang
- X-ray Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL, 60439, USA
| | - José Sánchez Costa
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
| | - Dooshaye Moonshiram
- Instituto Madrileño de Estudios Avanzados en, Nanociencia (IMDEA Nanociencia), Calle Faraday 9, 28049, Madrid, Spain
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22
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Soroceanu I, Lupu SL, Rusu I, Piedrahita-Bello M, Salmon L, Molnár G, Demont P, Bousseksou A, Rotaru A. Ligand substitution effects on the charge transport properties of the spin crossover complex [Fe(Htrz) 1+y-x (trz) 2-y (NH 2trz) x ](BF 4)y·nH 2O. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:264002. [PMID: 32120350 DOI: 10.1088/1361-648x/ab7ba2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The complex dielectric permittivity of a series of spin crossover complexes, with variable ligand stoichiometry [Fe(Htrz)1+y-x (trz)2-y (NH2trz) x ](BF4) y ·nH2O, has been investigated as a function of temperature in a wide frequency range. In each compound, a substantial drop of the conductivity and permittivity is evidenced when going from the low spin to the high spin state, albeit with decreasing amplitude for increasing ligand substitution (i.e. for increasing x). The deconvolution of the dielectric spectra using the Havriliak-Negami equation allowed to extract the dipole and conductivity relaxation times, their distributions as well as the dielectric strengths in both spin states. Remarkably, no clear correlation appears between the conductivity changes and the lattice properties (Debye temperature) in the dilution series. We rationalize these results by considering the dimensionality of the system (1D), wherein the charge transport occurs most likely by hopping along the [Fe(Rtrz)3] n n+ chains.
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Affiliation(s)
- Ion Soroceanu
- Faculty of Electrical Engineering and Computer Science and MANSiD Research Center, Stefan cel Mare University, Suceava, Romania
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23
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Zhang Y, Séguy I, Ridier K, Shalabaeva V, Piedrahita-Bello M, Rotaru A, Salmon L, Molnár G, Bousseksou A. Resistance switching in large-area vertical junctions of the molecular spin crossover complex [Fe(HB(tz) 3) 2]: ON/OFF ratios and device stability. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:214010. [PMID: 32032965 DOI: 10.1088/1361-648x/ab741e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multilayer crossbar junctions composed of ITO/[Fe(HB(1,2,4-triazol-1-yl)3)2]/M (with M = Al or Ca) were fabricated and investigated for their resistance switching properties. Current-voltage-temperature maps revealed ON/OFF resistance ratios as high as 400, with the ON and OFF states defined, respectively, as the low-resistance, low spin state and the high-resistance, high spin state of the spin crossover layer. Similar results were obtained with Al and Ca cathodes indicating that the charge transport in the insulating spin crossover film is at the origin of the resistance switching instead of electron injection at the electrodes. The reproducibility and stability of the device properties were also studied.
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Affiliation(s)
- Yuteng Zhang
- LCC, CNRS and Université de Toulouse, Toulouse, France. LAAS, CNRS and Université de Toulouse, INSA, UPS, F-31077 Toulouse, France
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24
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Usmani S, Mikolasek M, Gillet A, Sanchez Costa J, Rigoulet M, Chaudret B, Bousseksou A, Lassalle-Kaiser B, Demont P, Molnár G, Salmon L, Carrey J, Tricard S. Spin crossover in Fe(triazole)-Pt nanoparticle self-assembly structured at the sub-5 nm scale. NANOSCALE 2020; 12:8180-8187. [PMID: 32248213 DOI: 10.1039/d0nr02154g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A main goal of molecular electronics is to relate the performance of devices to the structure and electronic state of molecules. Among the variety of possibilities that organic, organometallic and coordination chemistries offer to tune the energy levels of molecular components, spin crossover phenomenon is a perfect candidate for elaboration of molecular switches. The reorganization of the electronic state population of the molecules associated to the spin crossover can indeed lead to a significant change in conductivity. However, molecular spin crossover is very sensitive to the environment and can disappear once the molecules are integrated into devices. Here, we show that the association of ultra-small 1.2 nm platinum nanoparticles with FeII triazole-based spin crossover coordination polymers leads to self-assemblies, extremely well organized at the sub-3 nm scale. The quasi-perfect alignment of nanoparticles observed by transmission electron microscopy, in addition to specific signature in infrared spectroscopy, demonstrates the coordination of the long-chain molecules with the nanoparticles. Spin crossover is confirmed in such assemblies by X-ray absorption spectroscopic measurements and shows unambiguous characteristics both in magnetic and charge transport measurements. Coordinating polymers are therefore ideal candidates for the elaboration of robust, well-organized, hybrid self-assemblies with metallic nanoparticles, while maintaining sensitive functional properties, such as spin crossover.
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Affiliation(s)
- Suhail Usmani
- Laboratoire de Physique et Chimie des Nano-Objets, INSA, CNRS, Université de Toulouse, Toulouse, France.
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25
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Zhang L, Li H, Feng YP, Shen L. Diverse Transport Behaviors in Cyclo[18]carbon-Based Molecular Devices. J Phys Chem Lett 2020; 11:2611-2617. [PMID: 32091224 DOI: 10.1021/acs.jpclett.0c00357] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Scientists have been trying to synthesize ring-shaped pure carbon molecules for a half century. A breakthrough was made recently, and cyclo[18]carbon (C18) was produced successfully by bonding an 18-atom ring of carbon. Because of its potential application in molecular devices, it is natural and timely to study the transport behaviors of C18. Here we report the electron transport properties of the C18-ring connected to various electrodes, including 1D carbon chain, 2D graphene, and 3D silver electrodes, using density-functional theory combined with the nonequilibrium Green's function technique. Diverse transport behaviors are found for the C18 molecular devices, including an Ohmic characteristic, a quasi Schottky feature, and a current-limiting function. The origin and mechanism of unique nonlinear I-V characteristics are investigated by the transmission pathway, transmission spectra, density of states, and molecular frontier orbital theory. This study provides a theoretical guide for exploring the next-generation molecular devices based on this newcomer to the family of carbon allotropes.
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Affiliation(s)
- Lishu Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
| | - Hui Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, People's Republic of China
| | - Yuan Ping Feng
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
| | - Lei Shen
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117542, Singapore
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26
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Pask CM, Greatorex S, Kulmaczewski R, Baldansuren A, McInnes EJL, Bamiduro F, Yamada M, Yoshinari N, Konno T, Halcrow MA. Elucidating the Structural Chemistry of a Hysteretic Iron(II) Spin-Crossover Compound From its Copper(II) and Zinc(II) Congeners. Chemistry 2020; 26:4833-4841. [PMID: 32017244 DOI: 10.1002/chem.202000101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Indexed: 11/12/2022]
Abstract
Annealing [FeL2 ][BF4 ]2 ⋅2 H2 O (L=2,6-bis-[5-methyl-1H-pyrazol-3-yl]pyridine) affords an anhydrous material, which undergoes a spin transition at T1/2 =205 K with a 65 K thermal hysteresis loop. This occurs through a sequence of phase changes, which were monitored by powder diffraction in an earlier study. [CuL2 ][BF4 ]2 ⋅2 H2 O and [ZnL2 ][BF4 ]2 ⋅2 H2 O are not perfectly isostructural but, unlike the iron compound, they undergo single-crystal-to-single-crystal dehydration upon annealing. All the annealed compounds initially adopt the same tetragonal phase but undergo a phase change near room temperature upon re-cooling. The low-temperature phase of [CuL2 ][BF4 ]2 involves ordering of its Jahn-Teller distortion, to a monoclinic lattice with three unique cation sites. The zinc compound adopts a different, triclinic low-temperature phase with significant twisting of its coordination sphere, which unexpectedly becomes more pronounced as the crystal is cooled. Synchrotron powder diffraction data confirm that the structural changes in the anhydrous zinc complex are reproduced in the high-spin iron compound, before the onset of spin-crossover. This will contribute to the wide hysteresis in the spin transition of the iron complex. EPR spectra of copper-doped [Fe0.97 Cu0.03 L2 ][BF4 ]2 imply its low-spin phase contains two distinct cation environments in a 2:1 ratio.
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Affiliation(s)
- Christopher M Pask
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Sam Greatorex
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Rafal Kulmaczewski
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Amgalanbaatar Baldansuren
- School of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.,current address: Chemistry and Chemical Biology, 120 Cogswell, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, NY, 12180, USA
| | - Eric J L McInnes
- School of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Faith Bamiduro
- School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Mihoko Yamada
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.,current address: Division of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan
| | - Nobuto Yoshinari
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
| | - Takumi Konno
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
| | - Malcolm A Halcrow
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.,Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan
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Wu W, Lin XL, Liu Q, He Y, Huang YR, Chen B, Li HH, Chen ZR. The engineering of stilbazolium/iodocuprate hybrids with optical/electrical performances by modulating inter-molecular charge transfer among H-aggregated chromophores. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01672d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Good electrical bistability performances in stilbazolium/iodocuprate hybrids stem from the better face-to-face π⋯π stacking interactions induced by the substituents with appropriate lengths and electronic natures.
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Affiliation(s)
- Wei Wu
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | | | - Qian Liu
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Yan He
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | | | - Bin Chen
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Hao-Hong Li
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
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28
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Rubio-Giménez V, Tatay S, Martí-Gastaldo C. Electrical conductivity and magnetic bistability in metal–organic frameworks and coordination polymers: charge transport and spin crossover at the nanoscale. Chem Soc Rev 2020; 49:5601-5638. [DOI: 10.1039/c9cs00594c] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This review aims to reassess the progress, issues and opportunities in the path towards integrating conductive and magnetically bistable coordination polymers and metal–organic frameworks as active components in electronic devices.
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Affiliation(s)
- Víctor Rubio-Giménez
- Instituto de Ciencia Molecular
- Universitat de València
- 46980 Paterna
- Spain
- Centre for Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACS)
| | - Sergio Tatay
- Instituto de Ciencia Molecular
- Universitat de València
- 46980 Paterna
- Spain
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29
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Zhao L, Wu W, Shen X, Liu Q, He Y, Song K, Li H, Chen Z. Nonvolatile Electrical Bistability Behaviors Observed in Au/Ag Nanoparticle-Embedded MOFs and Switching Mechanisms. ACS APPLIED MATERIALS & INTERFACES 2019; 11:47073-47082. [PMID: 31747747 DOI: 10.1021/acsami.9b17000] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electrically bistable devices play an important role in the next generation of information materials. Plasmonic noble metal nanoparticles (Au and Ag NPs) with diameters <6 nm were embedded into 3-D Cd-based metal-organic framework (MOF) matrixes via the photoreduction method to generate Au (Ag) NPs@MOF composites. Electrical bistability measurements on the sandwiched ITO/NPs@MOF/silver devices indicate that two switchable conductivity states with nonvolatile memory behaviors can be observed. The ITO/Au NP@2/Ag device with neutral matrix possesses the highest ON/OFF current ratio of 104, which can be attributed to its higher electron tunneling efficiency because of the better dispersity of Au NPs in the MOF matrix. A mechanism regarding the electric-field-induced charge-transfer process assisted by conformational change in the active layer was proposed.
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Affiliation(s)
- Liming Zhao
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Wei Wu
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Xiaqiang Shen
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Qian Liu
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Yan He
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Kaiyue Song
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Haohong Li
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Zhirong Chen
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
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30
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Torres-Cavanillas R, Lima-Moya L, Tichelaar FD, Zandbergen HW, Giménez-Marqués M, Coronado E. Downsizing of robust Fe-triazole@SiO 2 spin-crossover nanoparticles with ultrathin shells. Dalton Trans 2019; 48:15465-15469. [PMID: 31241090 DOI: 10.1039/c9dt02086a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chemical protocol to design robust hybrid [Fe(Htrz)2(trz)](BF4)@SiO2 nanoparticles (NPs) with sizes as small as 28 nm and ultrathin silica shells below 3 nm has been developed. These NPs present a characteristic abrupt spin transition with a subsequent decrease in the width of the thermal hysteresis upon reducing the NP size.
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Affiliation(s)
- R Torres-Cavanillas
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - L Lima-Moya
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - F D Tichelaar
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - H W Zandbergen
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - M Giménez-Marqués
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - E Coronado
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
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