1
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Zhang Y, Torres-Cavanillas R, Yan X, Zeng Y, Jiang M, Clemente-León M, Coronado E, Shi S. Spin crossover iron complexes with spin transition near room temperature based on nitrogen ligands containing aromatic rings: from molecular design to functional devices. Chem Soc Rev 2024; 53:8764-8789. [PMID: 39072682 DOI: 10.1039/d3cs00688c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
During last decades, significant advances have been made in iron-based spin crossover (SCO) complexes, with a particular emphasis on achieving reversible and reproducible thermal hysteresis at room temperature (RT). This pursuit represents a pivotal goal within the field of molecular magnetism, aiming to create molecular devices capable of operating in ambient conditions. Here, we summarize the recent progress of iron complexes with spin transition near RT based on nitrogen ligands containing aromatic rings from molecular design to functional devices. Specifically, we discuss the various factors, including supramolecular interactions, crystal packing, guest molecules and pressure effects, that could influence its cooperativity and the spin transition temperature. Furthermore, the most recent advances in their implementation as mechanical actuators, switching/memories, sensors, and other devices, have been introduced as well. Finally, we give a perspective on current challenges and future directions in SCO community.
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Affiliation(s)
- Yongjie Zhang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Xinxin Yan
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Yixun Zeng
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Mengyun Jiang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Shengwei Shi
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), Jianghan University, Wuhan, 430056, China
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2
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Seredyuk M, Znovjyak K, Valverde-Muñoz FJ, da Silva I, Muñoz MC, Moroz YS, Real JA. 105 K Wide Room Temperature Spin Transition Memory Due to a Supramolecular Latch Mechanism. J Am Chem Soc 2022; 144:14297-14309. [PMID: 35900921 PMCID: PMC9380689 DOI: 10.1021/jacs.2c05417] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
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Little is known about the mechanisms behind the bistability
(memory)
of molecular spin transition compounds over broad temperature ranges
(>100 K). To address this point, we report on a new discrete FeII neutral complex [FeIIL2]0 (1) based on a novel asymmetric tridentate ligand 2-(5-(3-methoxy-4H-1,2,4-triazol-3-yl)-6-(1H-pyrazol-1-yl))pyridine
(L). Due to the asymmetric cone-shaped form, in the lattice, the formed
complex molecules stack into a one-dimensional (1D) supramolecular
chain. In the case of the rectangular supramolecular arrangement of
chains in methanolates 1-A and 1-B (both
orthorhombic, Pbcn) differing, respectively, by bent
and extended spatial conformations of the 3-methoxy groups (3MeO),
a moderate cooperativity is observed. In contrast, the hexagonal-like
arrangement of supramolecular chains in polymorph 1-C (monoclinic, P21/c) results in steric coupling of the transforming complex
species with the peripheral flipping 3MeO group. The group acts as
a supramolecular latch, locking the huge geometric distortion of complex 1 and in turn the trigonal distortion of the central FeII ion in the high-spin state, thereby keeping it from the
transition to the low-spin state over a large thermal range. Analysis
of the crystal packing of 1-C reveals significantly changing
patterns of close intermolecular interactions on going between the
phases substantiated by the energy framework analysis. The detected
supramolecular mechanism leads to a record-setting robust 105 K wide
hysteresis spanning the room temperature region and an atypically
large TLIESST relaxation value of 104
K of the photoexcited high-spin state. This work highlights a viable
pathway toward a new generation of cleverly designed molecular memory
materials.
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Affiliation(s)
- Maksym Seredyuk
- Instituto de Ciencia Molecular, Departamento de Química Inorgánica, Universidad de Valencia, 46980 Paterna, Valencia, Spain.,Department of Chemistry, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, 01601 Kyiv, Ukraine
| | - Kateryna Znovjyak
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 64/13, Volodymyrska Street, 01601 Kyiv, Ukraine
| | | | - Ivan da Silva
- ISIS Neutron Facility, STFC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, U.K
| | - M Carmen Muñoz
- Departamento de Fisíca Aplicada, Universitat Politècnica de València, Camino de Vera s/n, E-46022 Valencia, Spain
| | - Yurii S Moroz
- Chemspace Ltd., Chervonotkatska Street 78, 02094 Kyiv, Ukraine.,ChemBio Center, Taras Shevchenko National University of Kyiv, 60, Volodymyrska Street, 01601 Kyiv, Ukraine
| | - José Antonio Real
- Instituto de Ciencia Molecular, Departamento de Química Inorgánica, Universidad de Valencia, 46980 Paterna, Valencia, Spain
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3
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Suryadevara N, Mizuno A, Spieker L, Salamon S, Sleziona S, Maas A, Pollmann E, Heinrich B, Schleberger M, Wende H, Kuppusamy SK, Ruben M. Structural Insights into Hysteretic Spin-Crossover in a Set of Iron(II)-2,6-bis(1H-Pyrazol-1-yl)Pyridine) Complexes. Chemistry 2022; 28:e202103853. [PMID: 34939670 PMCID: PMC9305185 DOI: 10.1002/chem.202103853] [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: 10/26/2021] [Indexed: 11/21/2022]
Abstract
Bistable spin-crossover (SCO) complexes that undergo abrupt and hysteretic (ΔT1/2 ) spin-state switching are desirable for molecule-based switching and memory applications. In this study, we report on structural facets governing hysteretic SCO in a set of iron(II)-2,6-bis(1H-pyrazol-1-yl)pyridine) (bpp) complexes - [Fe(bpp-COOEt)2 ](X)2 ⋅CH3 NO2 (X=ClO4 , 1; X=BF4 , 2). Stable spin-state switching - T1/2 =288 K; ΔT1/2 =62 K - is observed for 1, whereas 2 undergoes above-room-temperature lattice-solvent content-dependent SCO - T1/2 =331 K; ΔT1/2 =43 K. Variable-temperature single-crystal X-ray diffraction studies of the complexes revealed pronounced molecular reorganizations - from the Jahn-Teller-distorted HS state to the less distorted LS state - and conformation switching of the ethyl group of the COOEt substituent upon SCO. Consequently, we propose that the large structural reorganizations rendered SCO hysteretic in 1 and 2. Such insights shedding light on the molecular origin of thermal hysteresis might enable the design of technologically relevant molecule-based switching and memory elements.
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Affiliation(s)
- Nithin Suryadevara
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Asato Mizuno
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Lea Spieker
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Soma Salamon
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Stephan Sleziona
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - André Maas
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Erik Pollmann
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Benoît Heinrich
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)CNRS-Université de Strasbourg23, rue du Loess, BP 4367034Strasbourg Cedex 2France
| | - Marika Schleberger
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Heiko Wende
- University of Duisburg-EssenFaculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE)Lotharstraße 147057DuisburgGermany
| | - Senthil Kumar Kuppusamy
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
| | - Mario Ruben
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institute for Quantum Materials and Technologies (IQMT)Karlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Centre Européen de Sciences Quantiques (CESQ)Institut de Science et d'Ingénierie Supramoléculaires (ISIS)8 allée Gaspard Monge, BP 7002867083Strasbourg CedexFrance
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4
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Attwood M, Akutsu H, Martin L, Blundell TJ, Le Maguere P, Turner SS. Exceptionally high temperature spin crossover in amide-functionalised 2,6-bis(pyrazol-1-yl)pyridine iron(ii) complex revealed by variable temperature Raman spectroscopy and single crystal X-ray diffraction. Dalton Trans 2021; 50:11843-11851. [PMID: 34369514 DOI: 10.1039/d1dt01743h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a novel amide-functionalised 2,6-bis(pyrazol-1-yl)pyridine-4-carboxamide ligand (bppCONH2) is described. The complex salts [Fe(bppCONH2)2](BF4)2 and [Fe(bppCONH2)2](ClO4)2 were synthesised and characterised by SQUID magnetometry, differential scanning calorimetry, variable temperature Raman spectroscopy and single crystal X-ray diffraction. DSC measurements of [Fe(bppCONH2)2](BF4)2 indicate a spin-crossover (SCO) transition with T↑ at 481 K and T↓ at 461 K, showing a 20 K hysteresis. DSC for the perchlorate salt shows an SCO transition with T↑ at 459 K and T↓ at 445 K with a 14 K hysteresis. For the BF4- salt analysis of low and high-spin state crystal structures at 101, 290 and 500 K, suggest stabilisation of the low spin state due to the formation of 1D hydrogen-bonded cationic chains. Variable temperature Raman studies of the BF4 salt support the presence of a high temperature SCO. It is speculated that the presence of hysteresis may be attributed to differences in the inter-molecular hydrogen bonding in the low spin and high spin states.
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Affiliation(s)
- Max Attwood
- Department of Chemistry, University of Surrey, Guildford, GU2 7XH, UK.
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5
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Kipgen L, Bernien M, Tuczek F, Kuch W. Spin-Crossover Molecules on Surfaces: From Isolated Molecules to Ultrathin Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008141. [PMID: 33963619 DOI: 10.1002/adma.202008141] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Molecular spintronics seeks to use single or few molecules as functional building blocks for spintronic applications, directly relying on molecular properties or properties of interfaces between molecules and inorganic electrodes. Spin-crossover molecules (SCMs) are one of the most promising classes of candidates for molecular spintronics due to their bistability deriving from the existence of two spin states that can be reversibly switched by temperature, light, electric fields, etc. Building devices based on single or few molecules would entail connecting the molecule(s) with solid surfaces and understanding the fundamental behavior of the resulting assemblies. Herein, the investigations of SCMs on solid surfaces, ranging from isolated single molecules (submonolayers) to ultrathin films (mainly in the sub-10 nm range) are summarized. The achievements, challenges and prospects in this field are highlighted.
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Affiliation(s)
- Lalminthang Kipgen
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Matthias Bernien
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
| | - Wolfgang Kuch
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
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6
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Piñeiro-López L, Valverde-Muñoz FJ, Trzop E, Muñoz MC, Seredyuk M, Castells-Gil J, da Silva I, Martí-Gastaldo C, Collet E, Real JA. Guest induced reversible on-off switching of elastic frustration in a 3D spin crossover coordination polymer with room temperature hysteretic behaviour. Chem Sci 2020; 12:1317-1326. [PMID: 34163895 PMCID: PMC8179064 DOI: 10.1039/d0sc04420b] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A binary reversible switch between low-temperature multi-step spin crossover (SCO), through the evolution of the population γHS(T) with high-spin (HS)-low-spin (LS) sequence: HS1LS0 (state 1) ↔ HS2/3LS1/3 (state 2) ↔ HS1/2LS1/2 (state 3) ↔ HS1/3LS2/3 (state 4) ↔ HS0LS1 (state 5), and complete one step hysteretic spin transition featuring 20 K wide thermal hysteresis centred at 290 K occurs in the three-dimensional (3D) Hofmann-type porous coordination polymer {FeII(3,8phen)[Au(CN)2]2}·xPhNO2 (3,8phen = 3,8-phenanthroline, PhNO2 = nitrobenzene), made up of two identical interpenetrated pcu-type frameworks. The included PhNO2 guest (x = 1, 1·PhNO2) acts as a molecular wedge between the interpenetrated 3D frameworks via PhNO2-3,8phen intermolecular recognition and is the source of the strong elastic frustration responsible for the multi-step regime. Detailed X-ray single crystal analysis reflects competition between spatial periodicities of structurally inequivalent HS and LS SCO centres featuring: (i) symmetry breaking (state 3) with ⋯HS–LS⋯ ordering with γHS = 1/2; and (ii) occurrence of spatial modulation of the structure providing evidence for stabilization of local or aperiodic ordered mixed spin states for states 2 and 4 (with γHS ≈ 2/3) and 4 (with γHS ≈ 1/3), respectively. Below c.a. 20 K, structural and magnetic analyses show the photogeneration of a metastable HS*, state 6. The room-temperature single-step hysteretic regime appears with release of the guest (x = 0, 1) and the elastic frustration, and reversibly switches back to the original four-step behaviour upon guest re-adsorption. Both uncommon relevant SCO events meeting in the same material represent a rare opportunity to compare them in the frame of antiferro- and ferro-elastic transitions. Reversible switch between a robust bistable two-state room temperature spin crossover (SCO) and its transformation in a four-stepped elastically frustrated SCO due to guest inclusion in a metal–organic Hofmann framework.![]()
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Affiliation(s)
- Lucía Piñeiro-López
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Valencia Spain
| | | | - Elzbieta Trzop
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 F-35000 Rennes France
| | - M Carmen Muñoz
- Departamento de Física Aplicada, Universitat Politècnica de València Camino de Vera s/n E-46022 Valencia Spain
| | - Maksym Seredyuk
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Valencia Spain .,Department of Chemistry, Taras Shevchenko National University of Kyiv 64/13, Volodymyrska Street 01601 Kyiv Ukraine
| | - Javier Castells-Gil
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Valencia Spain
| | - Iván da Silva
- ISIS Neutron Facility, STFC Rutherford Appleton Laboratory Chilton Oxfordshire OX11 0QX UK
| | - Carlos Martí-Gastaldo
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Valencia Spain
| | - Eric Collet
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251 F-35000 Rennes France
| | - José Antonio Real
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia Valencia Spain
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7
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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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8
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Książek M, Weselski M, Kaźmierczak M, Tołoczko A, Siczek M, Durlak P, Wolny JA, Schünemann V, Kusz J, Bronisz R. Spatiotemporal Studies of the One-Dimensional Coordination Polymer [Fe(ebtz) 2 (C 2 H 5 CN) 2 ](BF 4 ) 2 : Tug of War between the Nitrile Reorientation Versus Crystal Lattice as a Tool for Tuning the Spin Crossover Properties*. Chemistry 2020; 26:14419-14434. [PMID: 32678463 DOI: 10.1002/chem.202002460] [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: 05/19/2020] [Indexed: 12/21/2022]
Abstract
Reaction of 1,2-di(tetrazol-2-yl)ethane (ebtz) with Fe(BF4 )2 ⋅6 H2 O in different nitriles yields one-dimensional coordination polymers [Fe(ebtz)2 (RCN)2 ](BF4 )2 ⋅nRCN (n=2 for R=CH3 (1) and n=0 for R=C2 H5 (2) C3 H7 (3), C3 H5 (4), CH2 Cl (5)) exhibiting spin crossover (SCO). SCO in 1 and 3-5 is complete and occurs above 160 K. In 2, it is shifted to lower temperatures and is accompanied by wide hysteresis (T1/2 ↓ =78 K, T1/2 ↑ =123 K) and proceeds extremely slowly. Isothermal (80 K) time-resolved single-crystal X-ray diffraction studies revealed a complex nature for the HS→LS transition in 2. An initial, slow stage is associated with shrinkage of polymeric chains and with reduction of volume at 77 % (in relation to the difference between cell volumes VHS -VLS ) whereas only 16 % of iron(II) ions change spin state. In the second stage, an abrupt SCO occurs, associated with breathing of the crystal lattice along the direction of the Fe-nitrile bonds, while the nitriles reorient. HS→LS switching triggered by light (808 nm) reveals the coupling of spin state and nitrile orientation. The importance of this coupling was confirmed by studies of [Fe(ebtz)2 (C2 H5 CN/C3 H7 CN)2 ](BF4 )2 mixed crystals (2 a, 2 b), showing a shift of T1/2 to higher values and narrowing of the hysteresis loop concomitant with an increase of the fraction of butyronitrile. This increase reduces the capability of nitrile molecules to reorient. Density functional theory (DFT) studies of models of 1-5 suggest a particular possibility of 2 to adopt a low (140-145°) value of its Fe-N-C(propionitrile) angle.
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Affiliation(s)
- Maria Książek
- Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500, Chorzów, Poland
| | - Marek Weselski
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Marcin Kaźmierczak
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Aleksandra Tołoczko
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Miłosz Siczek
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Piotr Durlak
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Juliusz A Wolny
- Faculty of Physics, Technische Universität Kaiserslautern, Erwin Schrödinger Str. 46, 67663, Kaiserlautern, Germany
| | - Volker Schünemann
- Faculty of Physics, Technische Universität Kaiserslautern, Erwin Schrödinger Str. 46, 67663, Kaiserlautern, Germany
| | - Joachim Kusz
- Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500, Chorzów, Poland
| | - Robert Bronisz
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383, Wrocław, Poland
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9
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Spin Crossover in Bipyridine Derivative Bridged One-Dimensional Iron(III) Coordination Polymer. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6030029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Herein, the syntheses, solid-state molecular structures, and characterization of two types of one-dimensional FeIII coordination polymers showing thermally induced spin crossover are reported. The reaction of [Fe(acen)Cl] (acen2− = N,N′-ethylenebis(acetylacetonylideneaminate) with 3,3′-bpy or 4,4′-bpy (bpy = bipyridine) produced zigzag and linear one-dimensional chain complexes, [Fe(acen)(3,3′-bpy)][BPh4] (1) or [NEt3H][Fe(acen)(4,4′-bpy)][BPh4]2·0.5(4,4′-bpy) (2), respectively, as confirmed by single crystal X-ray diffraction analysis. Variable-temperature single crystal X-ray diffraction measurements, continuous-wave X-band electron paramagnetic resonance (EPR) spectra, 57Fe Mössßauer spectra, and DC magnetic susceptibility data revealed that complex 1 exhibited a gradual and complete spin crossover at a transition temperature of 212 K, while complex 2 undergoes an incomplete spin crossover even at 400 K.
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10
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Turner GF, Campbell F, Moggach SA, Parsons S, Goeta AE, Muñoz MC, Real JA. Single-Crystal X-Ray Diffraction Study of Pressure and Temperature-Induced Spin Trapping in a Bistable Iron(II) Hofmann Framework. Angew Chem Int Ed Engl 2020; 59:3106-3111. [PMID: 31782240 DOI: 10.1002/anie.201914360] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Indexed: 11/05/2022]
Abstract
High-pressure single-crystal X-ray diffraction has been used to trap both the low-spin (LS) and high-spin (HS) states of the iron(II) Hofmann spin crossover framework, [FeII (pdm)(H2 O)[Ag(CN)2 ]2 ⋅H2 O, under identical experimental conditions, allowing the structural changes arising from the spin-transition to be deconvoluted from previously reported thermal effects.
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Affiliation(s)
- Gemma F Turner
- School of Molecular Sciences/Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia
| | - Fallyn Campbell
- EastChem School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh, EH9 3JJ, UK
| | - Stephen A Moggach
- School of Molecular Sciences/Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia
| | - Simon Parsons
- EastChem School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh, EH9 3JJ, UK
| | - Andrés E Goeta
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - M Carmen Muñoz
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022, Valéncia, Spain
| | - José A Real
- Institut de Ciencia Molecular/ Departament de Quimica Inorganica, Universitat de València, Doctor Moliner 50, 46100 Burjassot, València, Spain
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11
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Turner GF, Campbell F, Moggach SA, Parsons S, Goeta AE, Muñoz MC, Real JA. Single‐Crystal X‐Ray Diffraction Study of Pressure and Temperature‐Induced Spin Trapping in a Bistable Iron(II) Hofmann Framework. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gemma F. Turner
- School of Molecular Sciences/Centre for Microscopy, Characterisation and Analysis The University of Western Australia 35 Stirling Highway, Crawley Perth WA 6009 Australia
| | - Fallyn Campbell
- EastChem School of Chemistry and Centre for Science at Extreme Conditions The University of Edinburgh Kings Buildings, West Mains Road Edinburgh EH9 3JJ UK
| | - Stephen A. Moggach
- School of Molecular Sciences/Centre for Microscopy, Characterisation and Analysis The University of Western Australia 35 Stirling Highway, Crawley Perth WA 6009 Australia
| | - Simon Parsons
- EastChem School of Chemistry and Centre for Science at Extreme Conditions The University of Edinburgh Kings Buildings, West Mains Road Edinburgh EH9 3JJ UK
| | - Andrés E. Goeta
- Department of Chemistry Durham University South Road Durham DH1 3LE UK
| | - M. Carmen Muñoz
- Departamento de Física Aplicada Universitat Politècnica de València Camino de Vera s/n 46022 Valéncia Spain
| | - José A. Real
- Institut de Ciencia Molecular/ Departament de Quimica Inorganica Universitat de València Doctor Moliner 50 46100 Burjassot València Spain
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12
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Benaicha B, Van Do K, Yangui A, Pittala N, Lusson A, Sy M, Bouchez G, Fourati H, Gómez-García CJ, Triki S, Boukheddaden K. Interplay between spin-crossover and luminescence in a multifunctional single crystal iron(ii) complex: towards a new generation of molecular sensors. Chem Sci 2019; 10:6791-6798. [PMID: 31391900 PMCID: PMC6640196 DOI: 10.1039/c9sc02331c] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 06/06/2019] [Indexed: 11/21/2022] Open
Abstract
We present a new example of a mononuclear iron(ii) complex exhibiting a correlated spin-crossover (SCO) transition and strong fluorescence, whose coordination sphere is saturated, for the first time, by six phosphorescent ligands. The interplay between SCO and light emission properties in the thermal region of the spin transition was investigated by means of magnetic, fluorescence, optical absorption and optical microscopy measurements on a single crystal. Overall, the results show an excellent correlation between fluorescence and magnetic data of the present gradual transition, indicating an extreme sensitivity of the optical activity of the ligand to the spin state of the active iron(ii) ions. These results open the way for conceiving new prototypes of pressure and temperature sensors based on this synergy between SCO and luminescence properties. In particular, the fact that cooperative SCO material is not a prerequisite for obtaining such synergetic effects, is useful for the design of thin films or nanoparticles, in which the cooperativity is reduced, for appropriate implementation in nanosized devices to enhance the sensing properties at the nanoscale.
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Affiliation(s)
- Bouabdellah Benaicha
- Univ. Brest , CNRS , CEMCA , 6 Avenue Victor Le Gorgeu, C. S. 93837 , 29238 Brest Cedex 3 , France .
| | - Khanh Van Do
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
| | - Aymen Yangui
- Department of Chemistry and Biochemistry , University of Oklahoma , 101 Stephenson Parkway , Norman , OK 73019 , USA
| | - Narsimhulu Pittala
- Univ. Brest , CNRS , CEMCA , 6 Avenue Victor Le Gorgeu, C. S. 93837 , 29238 Brest Cedex 3 , France .
| | - Alain Lusson
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
| | - Mouhamadou Sy
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
| | - Guillaume Bouchez
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
| | - Houcem Fourati
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
| | - Carlos J Gómez-García
- Instituto de Ciencia Molecular (ICMol) , Departamento de Química Inorgánica , Universidad de Valencia , C/Catedrático José Beltrán 2, 46980 Paterna , Spain
| | - Smail Triki
- Univ. Brest , CNRS , CEMCA , 6 Avenue Victor Le Gorgeu, C. S. 93837 , 29238 Brest Cedex 3 , France .
| | - Kamel Boukheddaden
- Groupe d'Etude de la Matière Condensée , CNRS UMR8635 , Université de Versailles Saint Quentin , Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles cedex , France .
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13
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Rubio-Giménez V, Bartual-Murgui C, Galbiati M, Núñez-López A, Castells-Gil J, Quinard B, Seneor P, Otero E, Ohresser P, Cantarero A, Coronado E, Real JA, Mattana R, Tatay S, Martí-Gastaldo C. Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films. Chem Sci 2019; 10:4038-4047. [PMID: 31015944 PMCID: PMC6460953 DOI: 10.1039/c8sc04935a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 02/20/2019] [Indexed: 11/24/2022] Open
Abstract
Mastering the nanostructuration of molecular materials onto solid surfaces and understanding how this process affects their properties are of utmost importance for their integration into solid-state electronic devices. This is even more important for spin crossover (SCO) systems, in which the spin transition is extremely sensitive to size reduction effects. These bi-stable materials have great potential for the development of nanotechnological applications provided their intrinsic properties can be successfully implemented in nanometric films, amenable to the fabrication of functional nanodevices. Here we report the fabrication of crystalline ultrathin films (<1-43 nm) of two-dimensional Hofmann-type coordination polymers by using an improved layer-by-layer strategy and a close examination of their SCO properties at the nanoscale. X-ray absorption spectroscopy data in combination with extensive atomic force microscopy analysis reveal critical dependence of the SCO transition on the number of layers and the microstructure of the films. This originates from the formation of segregated nanocrystals in early stages of the growth process that coalesce into a continuous film with an increasing number of growth cycles for an overall behaviour reminiscent of the bulk. As a result, the completeness of the high spin/low spin transition is dramatically hindered for films of less than 15 layers revealing serious limitations to the ultimate thickness that might be representative of the performance of the bulk when processing SCO materials as ultrathin films. This unprecedented exploration of the particularities of the growth of SCO thin films at the nanoscale should encourage researchers to put a spotlight on these issues when contemplating their integration into devices.
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Affiliation(s)
- Víctor Rubio-Giménez
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Carlos Bartual-Murgui
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Marta Galbiati
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Alejandro Núñez-López
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Javier Castells-Gil
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Benoit Quinard
- Unité Mixte de Physique , CNRS , Thales , University Paris Sud , Université Paris-Saclay , 91767 Palaiseau , France
| | - Pierre Seneor
- Unité Mixte de Physique , CNRS , Thales , University Paris Sud , Université Paris-Saclay , 91767 Palaiseau , France
| | - Edwige Otero
- Synchrotron SOLEIL , L'Orme des Merisiers , 91190 Saint Aubin , France
| | - Philippe Ohresser
- Synchrotron SOLEIL , L'Orme des Merisiers , 91190 Saint Aubin , France
| | - Andrés Cantarero
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Eugenio Coronado
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - José Antonio Real
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Richard Mattana
- Unité Mixte de Physique , CNRS , Thales , University Paris Sud , Université Paris-Saclay , 91767 Palaiseau , France
| | - Sergio Tatay
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
| | - Carlos Martí-Gastaldo
- Instituto de Ciencia Molecular , Universitat de València , Catedrático José Beltrán 2 , 46980 Paterna , Spain . ; ;
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14
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Evidence of Photo-Thermal Effects on the First-Order Thermo-Induced Spin Transition of [{Fe(NCSe)(py)2}2(m-bpypz)] Spin-Crossover Material. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5020021] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have investigated by means of optical microscopy and magnetic measurements the first-order thermal spin transition of the [{Fe(NCSe)(py)2}2(m-bpypz)] spin-crossover compound under various shining intensities, far from the light-induced spin-state trapping region. We found evidence of photo-heating effects on the thermally-induced hysteretic response of this spin-crossover material, thus causing the shift of the thermal hysteresis to lower temperature regions. The experimental results are discussed in terms of the apparent crystal temperature and are analyzed theoretically using two evolution equations of motion, written on the high-spin (HS) fraction and heat balance between the crystal and the thermal bath. A very good qualitative agreement was found between experiment and theory in the stationary regime, explaining the experimental observations well and identifying the key factors governing these photo-thermal effects.
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15
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Spatio-temporal Investigations of the Incomplete Spin Transition in a Single Crystal of [Fe(2-pytrz)2{Pt(CN)4}]·3H2O: Experiment and Theory. CRYSTALS 2019. [DOI: 10.3390/cryst9010046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Optical microscopy technique is used to investigate the thermal and the spatio-temporal properties of the spin-crossover single crystal [Fe(2-pytrz) 2 {Pt(CN) 4 }]·3H 2 O, which exhibits a first-order spin transition from a full high-spin (HS) state at high temperature to an intermediate, high-spin low-spin (HS-LS) state, below 153 K, where only one of the two crystallographic Fe(II) centers switches from the HS to HS-LS state. In comparison with crystals undergoing a complete spin transition, the present transformation involves smaller volume changes at the transition, which helps to preserving the crystal’s integrity. By analyzing the spatio-temporal properties of this spin transition, we evidenced a direct correlation between the orientation and shape of HS/HS-LS domain wall with the crystal’s shape. Thanks to the small volume change accompanying this spin transition, the analysis of the experimental data by an anisotropic reaction-diffusion model becomes very relevant and leads to an excellent agreement with the experimental observations.
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16
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17
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Delgado T, Meneses-Sánchez M, Piñeiro-López L, Bartual-Murgui C, Muñoz MC, Real JA. Thermo- and photo-modulation of exciplex fluorescence in a 3D spin crossover Hofmann-type coordination polymer. Chem Sci 2018; 9:8446-8452. [PMID: 30542594 PMCID: PMC6247521 DOI: 10.1039/c8sc02677g] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/07/2018] [Indexed: 12/20/2022] Open
Abstract
The search for bifunctional materials showing synergies between spin crossover (SCO) and luminescence has attracted substantial interest since they could be promising platforms for new switching electronic and optical technologies. In this context, we present the first three-dimensional FeII Hofmann-type coordination polymer exhibiting SCO properties and luminescence. The complex {FeII(bpben)[Au(CN)2]}@pyr (bpben = 1,4-bis(4-pyridyl)benzene) functionalized with pyrene (pyr) guests undergoes a cooperative multi-step SCO, which has been investigated by single crystal X-ray diffraction, single crystal UV-Vis absorption spectroscopy, and magnetic and calorimetric measurements. The resulting fluorescence from pyrene and exciplex emissions are controlled by the thermal and light irradiation (LIESST effect) dependence of the high/low-spin state population of FeII. Conversely, the SCO can be tracked by monitoring the fluorescence emission. This ON-OFF interplay between SCO and luminescence combined with the amenability of Hofmann-type materials to be processed at the nano-scale may be relevant for the generation of SCO-based sensors, actuators and spintronic devices.
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Affiliation(s)
- Teresa Delgado
- Départment de Chimie Physique , Université de Genève , Rue Ernest Ansermet, 30 , 1211 Genève , Switzerland
| | - Manuel Meneses-Sánchez
- Departament de Química Inorgánica , Institut de Ciència Molecular (ICMol) , Universitat de València , Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Spain
| | - Lucía Piñeiro-López
- Departament de Química Inorgánica , Institut de Ciència Molecular (ICMol) , Universitat de València , Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Spain
| | - Carlos Bartual-Murgui
- Departament de Química Inorgánica , Institut de Ciència Molecular (ICMol) , Universitat de València , Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Spain
| | - M Carmen Muñoz
- Departamento de Física Aplicada , Universitat Politècnica de València , Camino de Vera s/n , 46022 Valencia , Spain
| | - José Antonio Real
- Departament de Química Inorgánica , Institut de Ciència Molecular (ICMol) , Universitat de València , Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Spain
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18
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Valverde-Muñoz FJ, Muñoz MC, Ferrer S, Bartual-Murgui C, Real JA. Switchable Spin-Crossover Hofmann-Type 3D Coordination Polymers Based on Tri- and Tetratopic Ligands. Inorg Chem 2018; 57:12195-12205. [PMID: 30207715 DOI: 10.1021/acs.inorgchem.8b01842] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
FeII spin-crossover (SCO) coordination polymers of the Hofmann type have become an archetypal class of responsive materials. Almost invariably, the construction of their architectures has been based on the use of monotopic and linear ditopic pyridine-like ligands. In the search for new Hofmann-type architectures with SCO properties, here we analyze the possibilities of bridging ligands with higher connectivity degree. More precisely, the synthesis and structure of {FeII(LN3)[MI(CN)2]2}·(Guest) (Guest = nitrobenzene, benzonitrile, o-dichlorobenzene; MI = Ag, Au) and {FeII(LN4)[Ag2(CN)3][Ag(CN)2]}·H2O are described, where LN3 and LN4 are the tritopic and tetratopic ligands 1,3,5-tris(pyridin-4-ylethynyl)benzene and 1,2,4,5-tetrakis(pyridin-4-ylethynyl)benzene. This new series of Hofmann clathrates displays thermo- and photoinduced SCO behaviors.
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Affiliation(s)
- Francisco Javier Valverde-Muñoz
- Institut de Ciència Molecular (ICMol) , Universitat de València , C/Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Valencia , Spain
| | - M Carmen Muñoz
- Departamento de Física Aplicada , Universitat Politècnica de València , Camino de Vera s/n , 46022 Valencia , Spain
| | - Sacramento Ferrer
- Departament de Química Inorgànica , Universitat de València , Av. Vicent Andrés Estellés, s/n , 46100 Burjassot , Valencia , Spain
| | - Carlos Bartual-Murgui
- Institut de Ciència Molecular (ICMol) , Universitat de València , C/Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Valencia , Spain
| | - José A Real
- Institut de Ciència Molecular (ICMol) , Universitat de València , C/Catedrático José Beltrán Martínez, 2 , 46980 Paterna , Valencia , Spain
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19
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Hierarchical lithographic patterning of two abrupt spin cross-over Fe(II) complexes into micro-cross-stripes. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1481-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Borgatti F, Torelli P, Brucale M, Gentili D, Panaccione G, Castan Guerrero C, Schäfer B, Ruben M, Cavallini M. Opposite Surface and Bulk Solvatochromic Effects in a Molecular Spin-Crossover Compound Revealed by Ambient Pressure X-ray Absorption Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3604-3609. [PMID: 29510051 DOI: 10.1021/acs.langmuir.8b00028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigate the solvatochromic effect of a Fe-based spin-crossover (SCO) compound via ambient pressure soft X-ray absorption spectroscopy (AP-XAS) and atomic force microscopy (AFM). AP-XAS provides the direct evidence of the spin configuration for the Fe(II) 3d states of the SCO material upon in situ exposure to specific gas or vapor mixtures; concurrent changes in nanoscale topography and mechanical characteristics are revealed via AFM imaging and AFM-based force spectroscopy, respectively. We find that exposing the SCO material to gaseous helium promotes an effective decrease of the transition temperature of its surface layers, while the exposure to methanol vapor causes opposite surfacial and bulk solvatochromic effects. Surfacial solvatochromism is accompanied by a dramatic reduction of the surface layers stiffness. We propose a rationalization of the observed effects based on interfacial dehydration and solvation phenomena.
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Affiliation(s)
- Francesco Borgatti
- Consiglio Nazionale delle Ricerche , Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) , Via P. Gobetti 101 , Bologna 40129 , Italy
| | - Piero Torelli
- CNR-IOM , Tasc Laboratory , S.S. 14 Km 163.5 in Area Science Park , Basovizza , Trieste 34149 , Italy
| | - Marco Brucale
- Consiglio Nazionale delle Ricerche , Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) , Via P. Gobetti 101 , Bologna 40129 , Italy
| | - Denis Gentili
- Consiglio Nazionale delle Ricerche , Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) , Via P. Gobetti 101 , Bologna 40129 , Italy
| | - Giancarlo Panaccione
- CNR-IOM , Tasc Laboratory , S.S. 14 Km 163.5 in Area Science Park , Basovizza , Trieste 34149 , Italy
| | - Celia Castan Guerrero
- CNR-IOM , Tasc Laboratory , S.S. 14 Km 163.5 in Area Science Park , Basovizza , Trieste 34149 , Italy
| | - Bernhard Schäfer
- Institute of Nanotechnology , Karlsruhe Institute of Technology , Eggenstein-Leopoldshafen D-76344 , Germany
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) , CNRS-Université de Strasbourg , 23, rue du Loess, BP 43 , Strasbourg Cedex 2 67034 , France
| | - Mario Ruben
- Institute of Nanotechnology , Karlsruhe Institute of Technology , Eggenstein-Leopoldshafen D-76344 , Germany
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) , CNRS-Université de Strasbourg , 23, rue du Loess, BP 43 , Strasbourg Cedex 2 67034 , France
| | - Massimiliano Cavallini
- Consiglio Nazionale delle Ricerche , Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) , Via P. Gobetti 101 , Bologna 40129 , Italy
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21
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Molnár G, Rat S, Salmon L, Nicolazzi W, Bousseksou A. Spin Crossover Nanomaterials: From Fundamental Concepts to Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1703862. [PMID: 29171924 DOI: 10.1002/adma.201703862] [Citation(s) in RCA: 291] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/04/2017] [Indexed: 05/28/2023]
Abstract
Nanoscale spin crossover materials capable of undergoing reversible switching between two electronic configurations with markedly different physical properties are excellent candidates for various technological applications. In particular, they can serve as active materials for storing and processing information in photonic, mechanical, electronic, and spintronic devices as well as for transducing different forms of energy in sensors and actuators. In this progress report, a brief overview on the current state-of-the-art of experimental and theoretical studies of nanomaterials displaying spin transition is presented. Based on these results, a detailed analysis and discussions in terms of finite size effects and other phenomena inherent to the reduced size scale are provided. Finally, recent research devices using spin crossover complexes are highlighted, emphasizing both challenges and prospects.
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Affiliation(s)
- Gábor Molnár
- Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, 31077, Toulouse, France
| | - Sylvain Rat
- Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, 31077, Toulouse, France
| | - Lionel Salmon
- Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, 31077, Toulouse, France
| | - William Nicolazzi
- Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, 31077, Toulouse, France
| | - Azzedine Bousseksou
- Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (UPS, INP), 205 route de Narbonne, 31077, Toulouse, France
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22
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Zhang D, Valverde-Muñoz FJ, Bartual-Murgui C, Piñeiro-López L, Muñoz MC, Real JA. {[Hg(SCN)3]2(μ-L)}2–: An Efficient Secondary Building Unit for the Synthesis of 2D Iron(II) Spin-Crossover Coordination Polymers. Inorg Chem 2018; 57:1562-1571. [DOI: 10.1021/acs.inorgchem.7b02906] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Daopeng Zhang
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
- College
of Chemical Engineering, Shandong University of Technology, Zibo 255049, People’s Republic of China
| | - Francisco Javier Valverde-Muñoz
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
| | - Carlos Bartual-Murgui
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
| | - Lucía Piñeiro-López
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
| | - M. Carmen Muñoz
- Departamento de Física Aplicada, Universitat Politècnica de València, Camino de Vera s/n, E-46022 Valencia, Spain
| | - José Antonio Real
- Instituto de Ciencia
Molecular (ICMol), Universitat de València, C/Catedrático José
Beltrán Martínez 2, 46980 Paterna (Valencia), Spain
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23
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Piñeiro-López L, Valverde-Muñoz FJ, Seredyuk M, Bartual-Murgui C, Muñoz MC, Real JA. Cyanido-Bridged FeII
-MI
Dimetallic Hofmann-Like Spin-Crossover Coordination Polymers Based on 2,6-Naphthyridine. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700920] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lucía Piñeiro-López
- Institut de Ciència Molecular (ICMol); Departament de Química Inorgànica; Universitat de València; C/ Catedrático José Beltrán Martínez, 2 46980 Paterna (Valencia) Spain
| | - Francisco Javier Valverde-Muñoz
- Institut de Ciència Molecular (ICMol); Departament de Química Inorgànica; Universitat de València; C/ Catedrático José Beltrán Martínez, 2 46980 Paterna (Valencia) Spain
| | - Maksym Seredyuk
- Institut de Ciència Molecular (ICMol); Departament de Química Inorgànica; Universitat de València; C/ Catedrático José Beltrán Martínez, 2 46980 Paterna (Valencia) Spain
- Department of Chemistry; Taras Shevchenko National University of Kyiv; Volodymyrska St. 64/13 01601 Kyiv Ukraine
| | - Carlos Bartual-Murgui
- Institut de Ciència Molecular (ICMol); Departament de Química Inorgànica; Universitat de València; C/ Catedrático José Beltrán Martínez, 2 46980 Paterna (Valencia) Spain
| | - M. Carmen Muñoz
- Departament de Física Aplicada; Universitat Politècnica de València; Camino de Vera s/n 46022 Valencia Spain
| | - José Antonio Real
- Institut de Ciència Molecular (ICMol); Departament de Química Inorgànica; Universitat de València; C/ Catedrático José Beltrán Martínez, 2 46980 Paterna (Valencia) Spain
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24
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Schäfer B, Bauer T, Faus I, Wolny JA, Dahms F, Fuhr O, Lebedkin S, Wille HC, Schlage K, Chevalier K, Rupp F, Diller R, Schünemann V, Kappes MM, Ruben M. A luminescent Pt2Fe spin crossover complex. Dalton Trans 2017; 46:2289-2302. [DOI: 10.1039/c6dt04360g] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterotrinuclear luminescent [Pt2Fe] spin crossover (SCO) complex was developed, synthesized, and investigated.
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25
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Valverde-Muñoz FJ, Seredyuk M, Muñoz MC, Znovjyak K, Fritsky IO, Real JA. Strong Cooperative Spin Crossover in 2D and 3D Fe II-M I,II Hofmann-Like Coordination Polymers Based on 2-Fluoropyrazine. Inorg Chem 2016; 55:10654-10665. [PMID: 27685168 DOI: 10.1021/acs.inorgchem.6b01901] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Self-assembling iron(II), 2-fluoropyrazine (Fpz), and [MII(CN)4]2- (MII = Ni, Pd, Pt) or [AuI(CN)2]- building blocks have afforded a new series of two- (2D) and three-dimensional (3D) Hofmann-like spin crossover (SCO) coordination polymers with strong cooperative magnetic, calorimetric, and optical properties. The iron(II) ions, lying on inversion centers, define elongated octahedrons equatorially surrounded by four equivalent centrosymmetric μ4-[MII(CN)4]2- groups. The axial positions are occupied by two terminal Fpz ligands affording significantly corrugated 2D layers {Fe(Fpz)2([MII(CN)4]}. The Pt and Pd derivatives undergo thermal- and light-induced SCO characterized by T1/2 temperatures centered at 155.5 and 116 K and hysteresis loops 22 K wide, while the Ni derivative is high spin at all temperatures, even at pressures of 0.7 GPa. The great stability of the high-spin state in the Ni derivative has tentatively been ascribed to the tight packing of the layers, which contrasts with that of Pt and Pd derivatives in the high- and low-spin states. The synthesis and structure of the 3D frameworks formulated {Fe(Fpz)[Pt(CN)4]}·1/2H2O and {Fe(Fpz)[Au(CN)2]2}, where Fpz acts as bridging ligand, which is also discussed. The former is high spin at all temperatures, while the latter displays very strong cooperative SCO centered at 243 K accompanied by a hysteresis loop 42.5 K wide. The crystal structures and SCO properties are compared with those of related complexes derived from pyrazine, 3-fluoropyridine, and pyridine.
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Affiliation(s)
- Francisco Javier Valverde-Muñoz
- Institut de Ciència Molecular (ICMol), Departament de Química Inorgànica, Universitat de València , C/Catedrático José Beltrán Martínez, 2, Paterna 46980, Valencia, Spain
| | - Maksym Seredyuk
- Institut de Ciència Molecular (ICMol), Departament de Química Inorgànica, Universitat de València , C/Catedrático José Beltrán Martínez, 2, Paterna 46980, Valencia, Spain.,Department of Chemistry, Taras Shevchenko National University , Volodymyrska Strasse 64, Kyiv 01601, Ukraine
| | - M Carmen Muñoz
- Departament de Física Aplicada, Universitat Politècnica de València , Camino de Vera s/n, Valencia 46022, Spain
| | - Kateryna Znovjyak
- Department of Chemistry, Taras Shevchenko National University , Volodymyrska Strasse 64, Kyiv 01601, Ukraine
| | - Igor O Fritsky
- Department of Chemistry, Taras Shevchenko National University , Volodymyrska Strasse 64, Kyiv 01601, Ukraine
| | - José Antonio Real
- Institut de Ciència Molecular (ICMol), Departament de Química Inorgànica, Universitat de València , C/Catedrático José Beltrán Martínez, 2, Paterna 46980, Valencia, Spain
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26
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Abhervé A, Recio-Carretero MJ, López-Jordà M, Clemente-Juan JM, Canet-Ferrer J, Cantarero A, Clemente-León M, Coronado E. Nonanuclear Spin-Crossover Complex Containing Iron(II) and Iron(III) Based on a 2,6-Bis(pyrazol-1-yl)pyridine Ligand Functionalized with a Carboxylate Group. Inorg Chem 2016; 55:9361-7. [DOI: 10.1021/acs.inorgchem.6b01508] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexandre Abhervé
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - María José Recio-Carretero
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Maurici López-Jordà
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Juan Modesto Clemente-Juan
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Josep Canet-Ferrer
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Andrés Cantarero
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular
(ICMol), Universidad de Valencia, Catedrático José Beltrán
2, 46980 Paterna, Spain
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27
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Wang YX, Qiu D, Li ZH, Gu ZG, Ren X, Li Z. Resin-Assisted Constructive Synthesis of Spin-Crossover Nanorod Arrays. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yu-Xia Wang
- The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education; School of Chemical and Material Engineering; Jiangnan University; 214122 Wuxi P. R. China
| | - Dan Qiu
- The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education; School of Chemical and Material Engineering; Jiangnan University; 214122 Wuxi P. R. China
| | - Zhi-Hua Li
- The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education; School of Chemical and Material Engineering; Jiangnan University; 214122 Wuxi P. R. China
| | - Zhi-Guo Gu
- The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education; School of Chemical and Material Engineering; Jiangnan University; 214122 Wuxi P. R. China
| | - Xuehong Ren
- The Key Laboratory of Eco-textiles of Ministry of Education; College of Textiles and Clothing; Jiangnan University 214122 Wuxi P. R. China
| | - Zaijun Li
- The Key Laboratory of Food Colloids and Biotechnology of Ministry of Education; School of Chemical and Material Engineering; Jiangnan University; 214122 Wuxi P. R. China
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28
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Solvent-Induced Polymorphism of Iron(II) Spin Crossover Complexes. MATERIALS 2016; 9:ma9070585. [PMID: 28773709 PMCID: PMC5456902 DOI: 10.3390/ma9070585] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 12/24/2022]
Abstract
Two new mononuclear iron(II) compounds (1) and (2) of the general formula [Fe(L)₂](BF₄)₂·nCH₃CN (L = 4-(2-bromoethyn-1-yl)-2,6-bis(pyrazol-1-yl)pyridine, n = 1 for (1) and n = 2 for compound (2)), were synthesized. The room temperature crystallization afforded concomitant formation of two different solvent analogues: compound (1) exhibiting triclinic P-1 and compound (2) monoclinic C2/c symmetry. Single-crystal X-ray studies confirmed the presence of the LS (low-spin) state for both compounds at 180 K and of the HS (high-spin) state for compound (2) at 293 K, in full agreement with the magnetic investigations for both solvent polymorphs. Compound (1) exhibits spin transition above 293 K followed by subsequent solvent liberation, while the spin transition of (2) takes already place at 237 K. After complete solvent removal from the crystal lattice, compound (1d) (the desolvated polymorph derived from (1)) exhibits spin transition centered at 342 K accompanied by a thermal hysteresis loop, while the analogous compound (2d) (the desolvated derivate of compound (2)) remains blocked in the HS state over all the investigated temperature range.
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29
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Dîrtu MM, Naik AD, Rotaru A, Spinu L, Poelman D, Garcia Y. FeII Spin Transition Materials Including an Amino–Ester 1,2,4-Triazole Derivative, Operating at, below, and above Room Temperature. Inorg Chem 2016; 55:4278-95. [DOI: 10.1021/acs.inorgchem.6b00015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marinela M. Dîrtu
- Institute
of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity, Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Anil D. Naik
- Institute
of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity, Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Aurelian Rotaru
- Department of Electrical Engineering and Computer Science & MANSiD Research Center, “Stefan cel Mare” University, University Street, 13, Suceava 720229 Romania
| | - Leonard Spinu
- Advanced
Materials Research Institute, Department of Physics, University of New Orleans (UNO), New Orleans, Louisiana 70148 United States
| | - Dirk Poelman
- Lumilab
Department Solid State Sciences, Ghent University, Krijgslaan 281, S1, B-9000 Gent, Belgium
| | - Yann Garcia
- Institute
of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity, Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
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30
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Jureschi CM, Linares J, Boulmaali A, Dahoo PR, Rotaru A, Garcia Y. Pressure and Temperature Sensors Using Two Spin Crossover Materials. SENSORS 2016; 16:187. [PMID: 26848663 PMCID: PMC4801564 DOI: 10.3390/s16020187] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 01/25/2016] [Accepted: 01/27/2016] [Indexed: 11/16/2022]
Abstract
The possibility of a new design concept for dual spin crossover based sensors for concomitant detection of both temperature and pressure is presented. It is conjectured from numerical results obtained by mean field approximation applied to a Ising-like model that using two different spin crossover compounds containing switching molecules with weak elastic interactions it is possible to simultaneously measure P and T. When the interaction parameters are optimized, the spin transition is gradual and for each spin crossover compounds, both temperature and pressure values being identified from their optical densities. This concept offers great perspectives for smart sensing devices.
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Affiliation(s)
- Catalin-Maricel Jureschi
- Faculty of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University, Suceava 720229, Romania.
- LISV, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris Saclay, Velizy 78140, France.
| | - Jorge Linares
- GEMaC, Université de Versailles Saint-Quentin-en-Yvelines, CNRS-UVSQ (UMR 8635), Université Paris Saclay, Versailles Cedex 78035, France.
| | - Ayoub Boulmaali
- LATMOS, Université de Versailles-Saint-Quentin-en-Yvelines, Sorbonne Universités, CNRS-UMR 8190, Université Paris Saclay, Guyancourt F-78280, France.
| | - Pierre Richard Dahoo
- LATMOS, Université de Versailles-Saint-Quentin-en-Yvelines, Sorbonne Universités, CNRS-UMR 8190, Université Paris Saclay, Guyancourt F-78280, France.
| | - Aurelian Rotaru
- Faculty of Electrical Engineering and Computer Science & Research Center MANSiD, Stefan cel Mare University, Suceava 720229, Romania.
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de Louvain, Place L. Pasteur 1, Louvain-la-Neuve 1348, Belgium.
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31
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Gentili D, Liscio F, Demitri N, Schäfer B, Borgatti F, Torelli P, Gobaut B, Panaccione G, Rossi G, Degli Esposti A, Gazzano M, Milita S, Bergenti I, Ruani G, Šalitroš I, Ruben M, Cavallini M. Surface induces different crystal structures in a room temperature switchable spin crossover compound. Dalton Trans 2016; 45:134-43. [PMID: 26575005 DOI: 10.1039/c5dt03712c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We investigated the influence of surfaces in the formation of different crystal structures of a spin crossover compound, namely [Fe(L)2] (LH: (2-(pyrazol-1-yl)-6-(1H-tetrazol-5-yl)pyridine), which is a neutral compound thermally switchable around room temperature. We observed that the surface induces the formation of two different crystal structures, which exhibit opposite spin transitions, i.e. on heating them up to the transition temperature, one polymorph switches from high spin to low spin and the second polymorph switches irreversibly from low spin to high spin. We attributed this inversion to the presence of water molecules H-bonded to the complex tetrazolyl moieties in the crystals. Thin deposits were investigated by means of polarized optical microscopy, atomic force microscopy, X-ray diffraction, X-ray absorption spectroscopy and micro Raman spectroscopy; moreover the analysis of the Raman spectra and the interpretation of spin inversion were supported by DFT calculations.
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Affiliation(s)
- Denis Gentili
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Via P. Gobetti 101, 40129 Bologna, Italy.
| | - Fabiola Liscio
- Consiglio Nazionale delle Ricerche, Istituto per la Microelettronica e Microsistemi, (CNR-IMM) Via P. Gobetti 101, 40129 Bologna, Italy
| | - Nicola Demitri
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza - Trieste, Italy
| | - Bernhard Schäfer
- Institute of Nanotechnology, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Denmark
| | - Francesco Borgatti
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Via P. Gobetti 101, 40129 Bologna, Italy.
| | - Piero Torelli
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali (CNR-IOM), Laboratorio TASC, Area Science Park, I-34149 Trieste, Italy
| | - Benoit Gobaut
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza - Trieste, Italy
| | - Giancarlo Panaccione
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali (CNR-IOM), Laboratorio TASC, Area Science Park, I-34149 Trieste, Italy
| | - Giorgio Rossi
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali (CNR-IOM), Laboratorio TASC, Area Science Park, I-34149 Trieste, Italy and Universita` di Milano, Dipartimento di Fisica, via Celoria 16, 20133 Milano, Italy
| | - Alessandra Degli Esposti
- Consiglio Nazionale delle Ricerche, Istituto per la Sintesi Organica e la Fotoreattività (CNR-ISOF) Via P. Gobetti 101, 40129 Bologna, Italy
| | - Massimo Gazzano
- Consiglio Nazionale delle Ricerche, Istituto per la Sintesi Organica e la Fotoreattività (CNR-ISOF) Via P. Gobetti 101, 40129 Bologna, Italy
| | - Silvia Milita
- Consiglio Nazionale delle Ricerche, Istituto per la Microelettronica e Microsistemi, (CNR-IMM) Via P. Gobetti 101, 40129 Bologna, Italy
| | - Ilaria Bergenti
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Via P. Gobetti 101, 40129 Bologna, Italy.
| | - Giampiero Ruani
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Via P. Gobetti 101, 40129 Bologna, Italy.
| | - Ivan Šalitroš
- Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, Slovak University of Technology, Bratislava, 81237, Slovakia
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Denmark and Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg, 23, rue du Loess, BP 43, 67034, Strasbourg Cedex 2, France
| | - Massimiliano Cavallini
- Consiglio Nazionale delle Ricerche, Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) Via P. Gobetti 101, 40129 Bologna, Italy.
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32
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White NG, Brooker S. New complexation behaviour of the potentially bis-terdentate triazole based ligands PMAT and PMPT : Fe III 4 oxo-bridged metallomacrocycles. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.03.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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33
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Cavallini M, Melucci M. Organic Materials for Time-Temperature Integrator Devices. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16897-16906. [PMID: 26156082 DOI: 10.1021/acsami.5b03931] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Time-temperature integrators (TTIs) are devices capable of recording the thermal history of a system. They have an enormous impact in the food and pharmaceutical industries. TTIs exploit several irreversible thermally activated transitions such as recrystallization, dewetting, smoothening, chemical decomposition, and polymorphic transitions, usually considered drawbacks for many technological applications. The aim of this article is to sensitize research groups working in organic synthesis and surface science toward TTI devices, enlarging the prospects of many new materials. We reviewed the principal applications highlighting the need and criticisms of TTIs, which offer a new opportunity for the development of many materials.
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Valverde-Muñoz FJ, Gaspar AB, Shylin SI, Ksenofontov V, Real JA. Synthesis of Nanocrystals and Particle Size Effects Studies on the Thermally Induced Spin Transition of the Model Spin Crossover Compound [Fe(phen)2(NCS)2]. Inorg Chem 2015. [DOI: 10.1021/acs.inorgchem.5b00978] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francisco Javier Valverde-Muñoz
- Institut de Ciència
Molecular/Departament de Química Inorgànica, Universitat de València, C/Catedratic José Beltrán Martínez,
2, 46980 Paterna, València, Spain
| | - Ana B. Gaspar
- Institut de Ciència
Molecular/Departament de Química Inorgànica, Universitat de València, C/Catedratic José Beltrán Martínez,
2, 46980 Paterna, València, Spain
| | - Sergii I. Shylin
- Institut für Anorganische und Analytsiche Chemie, Johannes-Gutenberg-Universität, Staudinger-Weg 9, D-55099 Mainz, Germany
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrska 64/13, 01601 Kyiv, Ukraine
| | - Vadim Ksenofontov
- Institut für Anorganische und Analytsiche Chemie, Johannes-Gutenberg-Universität, Staudinger-Weg 9, D-55099 Mainz, Germany
| | - José A. Real
- Institut de Ciència
Molecular/Departament de Química Inorgànica, Universitat de València, C/Catedratic José Beltrán Martínez,
2, 46980 Paterna, València, Spain
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35
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González-Monje P, Novio F, Ruiz-Molina D. Covalent Grafting of Coordination Polymers on Surfaces: The Case of Hybrid Valence Tautomeric Interphases. Chemistry 2015; 21:10094-9. [DOI: 10.1002/chem.201500671] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/07/2022]
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36
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Devid EJ, Martinho PN, Kamalakar MV, Šalitroš I, Prendergast Ú, Dayen JF, Meded V, Lemma T, González-Prieto R, Evers F, Keyes TE, Ruben M, Doudin B, van der Molen SJ. Spin transition in arrays of gold nanoparticles and spin crossover molecules. ACS NANO 2015; 9:4496-4507. [PMID: 25835284 DOI: 10.1021/acsnano.5b01103] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We investigate if the functionality of spin crossover molecules is preserved when they are assembled into an interfacial device structure. Specifically, we prepare and investigate gold nanoparticle arrays, into which room-temperature spin crossover molecules are introduced, more precisely, [Fe(AcS-BPP)2](ClO4)2, where AcS-BPP = (S)-(4-{[2,6-(dipyrazol-1-yl)pyrid-4-yl]ethynyl}phenyl)ethanethioate (in short, Fe(S-BPP)2). We combine three complementary experiments to characterize the molecule-nanoparticle structure in detail. Temperature-dependent Raman measurements provide direct evidence for a (partial) spin transition in the Fe(S-BPP)2-based arrays. This transition is qualitatively confirmed by magnetization measurements. Finally, charge transport measurements on the Fe(S-BPP)2-gold nanoparticle devices reveal a minimum in device resistance versus temperature, R(T), curves around 260-290 K. This is in contrast to similar networks containing passive molecules only that show monotonically decreasing R(T) characteristics. Backed by density functional theory calculations on single molecular conductance values for both spin states, we propose to relate the resistance minimum in R(T) to a spin transition under the hypothesis that (1) the molecular resistance of the high spin state is larger than that of the low spin state and (2) transport in the array is governed by a percolation model.
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Affiliation(s)
- Edwin J Devid
- †Huygens-Kamerlingh Onnes Laboratory, Leiden Institute of Physics, Leiden University P.O. Box 9504, 2300 RA Leiden, The Netherlands
| | - Paulo N Martinho
- ‡Centro de Química e Bioquímica (CQB), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - M Venkata Kamalakar
- §Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Ivan Šalitroš
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- ◊Department of Inorganic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinskeho 9, SK-812 37, Bratislava, Slovakia
| | - Úna Prendergast
- ⊥School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Jean-François Dayen
- #Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS UMR 7504, Laboratory NIE, Université de Strasbourg, 23 Rue du Loess, 67034 Strasbourg, France
| | - Velimir Meded
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tibebe Lemma
- ⊥School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Rodrigo González-Prieto
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- ¶Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
| | - Ferdinand Evers
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- △Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Straße 1, D-76128 Karlsruhe, Germany
| | - Tia E Keyes
- ⊥School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Mario Ruben
- ∥Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- #Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS UMR 7504, Laboratory NIE, Université de Strasbourg, 23 Rue du Loess, 67034 Strasbourg, France
| | - Bernard Doudin
- #Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS UMR 7504, Laboratory NIE, Université de Strasbourg, 23 Rue du Loess, 67034 Strasbourg, France
| | - Sense Jan van der Molen
- †Huygens-Kamerlingh Onnes Laboratory, Leiden Institute of Physics, Leiden University P.O. Box 9504, 2300 RA Leiden, The Netherlands
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Feltham HLC, Johnson C, Elliott ABS, Gordon KC, Albrecht M, Brooker S. “Tail” Tuning of Iron(II) Spin Crossover Temperature by 100 K. Inorg Chem 2015; 54:2902-9. [DOI: 10.1021/ic503040f] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Humphrey L. C. Feltham
- Department
of Chemistry and the MacDiarmid Institute for Advanced Materials and
Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Chloe Johnson
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Anastasia B. S. Elliott
- Department
of Chemistry and the MacDiarmid Institute for Advanced Materials and
Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Keith C. Gordon
- Department
of Chemistry and the MacDiarmid Institute for Advanced Materials and
Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Martin Albrecht
- School of Chemistry & Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Sally Brooker
- Department
of Chemistry and the MacDiarmid Institute for Advanced Materials and
Nanotechnology, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
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38
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Jureschi CM, Linares J, Rotaru A, Ritti MH, Parlier M, Dîrtu MM, Wolff M, Garcia Y. Pressure sensor via optical detection based on a 1D spin transition coordination polymer. SENSORS 2015; 15:2388-98. [PMID: 25621610 PMCID: PMC4367311 DOI: 10.3390/s150202388] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 01/13/2015] [Accepted: 01/16/2015] [Indexed: 11/23/2022]
Abstract
We have investigated the suitability of using the 1D spin crossover coordination polymer [Fe(4-(2′-hydroxyethyl)-1,2,4-triazole)3]I2·H2O, known to crossover around room temperature, as a pressure sensor via optical detection using various contact pressures up to 250 MPa. A dramatic persistent colour change is observed. The experimental data, obtained by calorimetric and Mössbauer measurements, have been used for a theoretical analysis, in the framework of the Ising-like model, of the thermal and pressure induced spin state switching. The pressure (P)-temperature (T) phase diagram calculated for this compound has been used to obtain the P-T bistability region.
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Affiliation(s)
- Cătălin M Jureschi
- Department of Electrical Engineering and Computer Science and Advanced Materials and Nanotechnology Laboratory (AMNOL), "Stefan cel Mare" University, University Street 13, Suceava 720229, Romania.
| | - Jorge Linares
- Groupe d'Etude de la Matière Condensée (GEMaC), CNRS-UMR 8635, Université Versailles St Quentin, Versailles Cedex 78035, France.
| | - Aurelian Rotaru
- Department of Electrical Engineering and Computer Science and Advanced Materials and Nanotechnology Laboratory (AMNOL), "Stefan cel Mare" University, University Street 13, Suceava 720229, Romania.
| | - Marie Hélène Ritti
- ONERA - DMSC, 29 Avenue de la Division Leclerc, BP72, Chatillon Cedex 92322, France.
| | - Michel Parlier
- ONERA - DMSC, 29 Avenue de la Division Leclerc, BP72, Chatillon Cedex 92322, France.
| | - Marinela M Dîrtu
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, Louvain-la-Neuve 1348, Belgium.
| | - Mariusz Wolff
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, Louvain-la-Neuve 1348, Belgium.
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecules, Solids, Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, Louvain-la-Neuve 1348, Belgium.
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39
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Venkataramudu U, Chandrasekhar N, Basak S, Prasad MD, Chandrasekar R. Fabrication of high-resolution 4,8(2) -type archimedean nanolattices composed of solution processable spin cross-over Fe(II) metallosupramolecular polymers. Macromol Rapid Commun 2015; 36:647-53. [PMID: 25594848 DOI: 10.1002/marc.201400628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 11/25/2014] [Indexed: 11/10/2022]
Abstract
This paper presents the synthesis of two highly soluble Fe(II) metallosupramolecular polymers with two counter anions from a novel back-to-back coupled hybrid ligand. The spin cross-over (SCO) temperature of polymers with BF4 and ClO4 counter anions is T1/2 = 313 K and T1/2 = 326 K, respectively. By following the top-down approach, one of the polymers (with ClO4 counter anion) is successfully solution processed using a lithographically controlled wetting technique to create laser readable high-resolution Archimedean (4,8(2) ) nanolattices (consist of diamagnetic octagons and SCO squares). The thickness and top area of each SCO square are ≈75 nm and ≈2 × 2 μm(2) , respectively.
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Affiliation(s)
- Uppari Venkataramudu
- Functional Molecular Nano/Micro Solids Laboratory, School of Chemistry, University of Hyderabad, Prof. C. R Rao Road, GachiBowli, 500046, India
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40
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Kershaw Cook LJ, Kulmaczewski R, Barrett SA, Halcrow MA. Iron(ii) complexes of 4-sulfanyl-, 4-sulfinyl- and 4-sulfonyl-2,6-dipyrazolylpyridine ligands. A subtle interplay between spin-crossover and crystallographic phase changes. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00083a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The compound shown exhibits an abrupt thermal spin-transition, with an accompanying crystallographic phase change at slightly lower temperature which is visible as a shoulder on the susceptibility curve.
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41
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Kershaw Cook LJ, Fisher J, Harding LP, Halcrow MA. An iron(ii) spin-crossover metallacycle from a back-to-back bis-[dipyrazolylpyridine]. Dalton Trans 2015; 44:9417-25. [DOI: 10.1039/c5dt00732a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Iron(ii) and zinc(ii) complexes of bis[2,6-di(pyrazol-1-yl)pyrid-4-yl]disulfide assemble into tetranuclear metallacycles according to ES-MS, DOSY NMR and conductivity data. The iron complex exhibits a thermal spin-state equilibrium in solution, which the iron centres appear to undergo independently of each other.
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Affiliation(s)
| | - Julie Fisher
- School of Chemistry
- University of Leeds
- Leeds
- UK LS2 9JT
| | - Lindsay P. Harding
- Department of Chemical and Biological Sciences
- University of Huddersfield
- Huddersfield
- UK HD1 3DH
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42
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Romero-Morcillo T, Valverde-Muñoz FJ, Muñoz MC, Herrera JM, Colacio E, Real JA. Two-step spin crossover behaviour in the chiral one-dimensional coordination polymer [Fe(HAT)(NCS)2]∞. RSC Adv 2015. [DOI: 10.1039/c5ra13491a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two-step spin crossover behaviour with large stabilisation of the intermediate state in a chiral one-dimensional coordination polymer.
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Affiliation(s)
| | | | - M. Carmen Muñoz
- Departamento de Física Aplicada
- Universitat Politècnica de València
- Valencia
- Spain
| | | | - Enrique Colacio
- Departamento de Química Inorgánica
- Universidad de Granada
- Granada
- Spain
| | - José A. Real
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
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43
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Koo YS, Galán-Mascarós JR. Spin crossover probes confer multistability to organic conducting polymers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:6785-9. [PMID: 25183547 DOI: 10.1002/adma.201402579] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/18/2014] [Indexed: 05/28/2023]
Abstract
Switchable organic conductors can be readily obtained by combining organic conducting polymers (CPs), with the unparalleled bistability of spin crossover (SCO) complexes. Here it is reported how CPs with embedded SCO components exhibit synergic multistability. Upon acting on the SCO probes by external stimuli (thermal activation in this case), the spin transition induces up to a 300% difference in the electrical conductivity of the CP component between the low-spin and high-spin regimes, and with a wide hysteresis at technologically relevant temperatures. These results pave the way for the exploitation of the unique SCO switching capabilities in electronic devices.
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Affiliation(s)
- Yong-Sung Koo
- Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, E-43007, Tarragona, Spain
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44
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Devid EJ, Martinho PN, Kamalakar MV, Prendergast Ú, Kübel C, Lemma T, Dayen JF, Keyes TE, Doudin B, Ruben M, van der Molen SJ. The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:1664-1674. [PMID: 25383278 PMCID: PMC4222375 DOI: 10.3762/bjnano.5.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 08/26/2014] [Indexed: 06/04/2023]
Abstract
We prepare and investigate two-dimensional (2D) single-layer arrays and multilayered networks of gold nanoparticles derivatized with conjugated hetero-aromatic molecules, i.e., S-(4-{[2,6-bipyrazol-1-yl)pyrid-4-yl]ethynyl}phenyl)thiolate (herein S-BPP), as capping ligands. These structures are fabricated by a combination of self-assembly and microcontact printing techniques, and are characterized by electron microscopy, UV-visible spectroscopy and Raman spectroscopy. Selective binding of the S-BPP molecules to the gold nanoparticles through Au-S bonds is found, with no evidence for the formation of N-Au bonds between the pyridine or pyrazole groups of BPP and the gold surface. Subtle, but significant shifts with temperature of specific Raman S-BPP modes are also observed. We attribute these to dynamic changes in the orientation and/or increased mobility of the molecules on the gold nanoparticle facets. As for their conductance, the temperature-dependence for S-BPP networks differs significantly from standard alkanethiol-capped networks, especially above 220 K. Relating the latter two observations, we propose that dynamic changes in the molecular layers effectively lower the molecular tunnel barrier for BPP-based arrays at higher temperatures.
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Affiliation(s)
- Edwin J Devid
- Huygens-Kamerlingh Onnes Laboratory, Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Paulo N Martinho
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Centro de Química e Bioquímica (CQB), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - M Venkata Kamalakar
- Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - Úna Prendergast
- School of Chemical Science, Dublin City University (DCU), Dublin 9, Ireland
| | - Christian Kübel
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Karlsruhe Nano Micro Facility (KNMF) Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tibebe Lemma
- School of Chemical Science, Dublin City University (DCU), Dublin 9, Ireland
| | - Jean-François Dayen
- Université de Strasbourg, IPCMS-CMRS UMR 7504, 23 Rue du Loess, 67034 Strasbourg, France
| | - Tia E Keyes
- School of Chemical Science, Dublin City University (DCU), Dublin 9, Ireland
| | - Bernard Doudin
- Université de Strasbourg, IPCMS-CMRS UMR 7504, 23 Rue du Loess, 67034 Strasbourg, France
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
- Université de Strasbourg, IPCMS-CMRS UMR 7504, 23 Rue du Loess, 67034 Strasbourg, France
| | - Sense Jan van der Molen
- Huygens-Kamerlingh Onnes Laboratory, Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
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45
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Gentili D, Valle F, Albonetti C, Liscio F, Cavallini M. Self-organization of functional materials in confinement. Acc Chem Res 2014; 47:2692-9. [PMID: 25068634 DOI: 10.1021/ar500210d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This Account aims to describe our experience in the use of patterning techniques for addressing the self-organization processes of materials into spatially confined regions on technologically relevant surfaces. Functional properties of materials depend on their chemical structure, their assembly, and spatial distribution at the solid state; the combination of these factors determines their properties and their technological applications. In fact, by controlling the assembly processes and the spatial distribution of the resulting structures, functional materials can be guided to technological and specific applications. We considered the principal self-organizing processes, such as crystallization, dewetting and phase segregation. Usually, these phenomena produce defective molecular films, compromising their use in many technological applications. This issue can be overcome by using patterning techniques, which induce molecules to self-organize into well-defined patterned structures, by means of spatial confinement. In particular, we focus our attention on the confinement effect achieved by stamp-assisted deposition for controlling size, density, and positions of material assemblies, giving them new chemical/physical functionalities. We review the methods and principles of the stamp-assisted spatial confinement and we discuss how they can be advantageously exploited to control crystalline order/orientation, dewetting phenomena, and spontaneous phase segregation. Moreover, we highlight how physical/chemical properties of soluble functional materials can be driven in constructive ways, by integrating them into operating technological devices.
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Affiliation(s)
- Denis Gentili
- Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) and ‡Istituto per
la Microelettronica e Microsistemi (CNR-IMM), Consiglio Nazionale delle Ricerche, via P. Gobetti 101, 40129 Bologna, Italy
| | - Francesco Valle
- Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) and ‡Istituto per
la Microelettronica e Microsistemi (CNR-IMM), Consiglio Nazionale delle Ricerche, via P. Gobetti 101, 40129 Bologna, Italy
| | - Cristiano Albonetti
- Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) and ‡Istituto per
la Microelettronica e Microsistemi (CNR-IMM), Consiglio Nazionale delle Ricerche, via P. Gobetti 101, 40129 Bologna, Italy
| | - Fabiola Liscio
- Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) and ‡Istituto per
la Microelettronica e Microsistemi (CNR-IMM), Consiglio Nazionale delle Ricerche, via P. Gobetti 101, 40129 Bologna, Italy
| | - Massimiliano Cavallini
- Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN) and ‡Istituto per
la Microelettronica e Microsistemi (CNR-IMM), Consiglio Nazionale delle Ricerche, via P. Gobetti 101, 40129 Bologna, Italy
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46
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Botcha AK, Basak S, Chandrasekar R. Lithographically organized 1D nano-tape arrays composed of solution processable above room temperature spin cross-over Fe(ii) coordination polymer. RSC Adv 2014. [DOI: 10.1039/c4ra06726f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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47
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Craig GA, Costa JS, Roubeau O, Teat SJ, Shepherd HJ, Lopes M, Molnár G, Bousseksou A, Aromí G. High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material. Dalton Trans 2014; 43:729-37. [PMID: 24145502 DOI: 10.1039/c3dt52075g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO () have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.
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Affiliation(s)
- Gavin A Craig
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain.
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48
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Gentili D, Durso M, Bettini C, Manet I, Gazzano M, Capelli R, Muccini M, Melucci M, Cavallini M. A time-temperature integrator based on fluorescent and polymorphic compounds. Sci Rep 2014; 3:2581. [PMID: 24002421 PMCID: PMC3761231 DOI: 10.1038/srep02581] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 07/25/2013] [Indexed: 11/29/2022] Open
Abstract
Despite the variety of functional properties of molecular materials, which make them of interest for a number of technologies, their tendency to form inhomogeneous aggregates in thin films and to self-organize in polymorphs are considered drawbacks for practical applications. Here, we report on the use of polymorphic molecular fluorescent thin films as time temperature integrators, a class of devices that monitor the thermal history of a product. The device is fabricated by patterning the fluorescent model compound thieno(bis)imide-oligothiophene. The fluorescence colour of the pattern changes as a consequence of an irreversible phase variation driven by temperature, and reveals the temperature at which the pattern was exposed. The experimental results are quantitatively analysed in the range 20–200°C and interpreted considering a polymorph recrystallization in the thin film. Noteworthy, the reported method is of general validity and can be extended to every compound featuring irreversible temperature-dependent change of fluorescence.
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Affiliation(s)
- Denis Gentili
- Consiglio Nazionale delle Ricerche-Istituto per lo studio dei Materiali Nanostrutturati (CNR- ISMN), via P. Gobetti 101, 40129 Bologna, Italy
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49
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Margapoti E, Gentili D, Amelia M, Credi A, Morandi V, Cavallini M. Tailoring of quantum dot emission efficiency by localized surface plasmon polaritons in self-organized mesoscopic rings. NANOSCALE 2014; 6:741-744. [PMID: 24305764 DOI: 10.1039/c3nr04708c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the tailoring of quantum dot (QD) emission efficiency by localized surface plasmon polaritons in self-organized mesoscopic rings. Ag nanoparticles (NPs) with CdSe QDs embedded in a polymeric matrix are spatially organised in mesoscopic rings and coupled in a tuneable fashion by breath figure formation. The mean distance between NPs and QDs and consequently the intensity of QD photoluminescence, which is enhanced by the coupling of surface plasmons and excitons, are tuned by acting on the NP concentration.
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Affiliation(s)
- Emanuela Margapoti
- Consiglio Nazionale delle Ricerche-Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), via P. Gobetti 101, 40129 Bologna, Italy.
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50
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Tanaka D, Aketa N, Tanaka H, Tamaki T, Inose T, Akai T, Toyama H, Sakata O, Tajiri H, Ogawa T. Thin films of spin-crossover coordination polymers with large thermal hysteresis loops prepared by nanoparticle spin coating. Chem Commun (Camb) 2014; 50:10074-7. [DOI: 10.1039/c4cc04123b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin-crossover nanoparticles form homogeneous thin films on substrates, which show abrupt spin transitions with large thermal hysteresis loops.
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Affiliation(s)
- Daisuke Tanaka
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Naoki Aketa
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Hirofumi Tanaka
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Takashi Tamaki
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Tomoko Inose
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Tomoki Akai
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Hirotaka Toyama
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
| | - Osami Sakata
- Synchrotron X-ray Station at SPring-8
- National Institute for Materials Science
- Sayo-gun, Japan
| | - Hiroo Tajiri
- Japan Synchrotron Radiation Research Institute/SPring-8
- Sayo-gun, Japan
| | - Takuji Ogawa
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Toyonaka, Japan
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