1
|
Jiang Y, Hayes S, Bittmann S, Sarracini A, Liu LC, Müller-Werkmeister HM, Miyawaki A, Hada M, Nakano S, Takahashi R, Banu S, Koshihara SY, Takahashi K, Ishikawa T, Miller RJD. Direct observation of photoinduced sequential spin transition in a halogen-bonded hybrid system by complementary ultrafast optical and electron probes. Nat Commun 2024; 15:4604. [PMID: 38834600 DOI: 10.1038/s41467-024-48529-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/03/2024] [Indexed: 06/06/2024] Open
Abstract
A detailed understanding of the ultrafast dynamics of halogen-bonded materials is desired for designing supramolecular materials and tuning various electronic properties by external stimuli. Here, a prototypical halogen-bonded multifunctional material containing spin crossover (SCO) cations and paramagnetic radical anions is studied as a model system of photo-switchable SCO hybrid systems using ultrafast electron diffraction and two complementary optical spectroscopic techniques. Our results reveal a sequential dynamics from SCO to radical dimer softening, uncovering a key transient intermediate state. In combination with quantum chemistry calculations, we demonstrate the presence of halogen bonds in the low- and high-temperature phases and propose their role during the photoinduced sequential dynamics, underscoring the significance of exploring ultrafast dynamics. Our research highlights the promising utility of halogen bonds in finely tuning functional properties across diverse photoactive multifunctional materials.
Collapse
Affiliation(s)
- Yifeng Jiang
- European XFEL, Holzkoppel 4, 22869, Schenefeld, Germany.
| | - Stuart Hayes
- Departments of Chemistry and Physics, University of Toronto, 80 St. George St., Toronto, M5S 3H6, ON, Canada
| | - Simon Bittmann
- Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Antoine Sarracini
- Departments of Chemistry and Physics, University of Toronto, 80 St. George St., Toronto, M5S 3H6, ON, Canada
- Paul Scherrer Institut, Forschungsstrasse 111, 5232, Villigen PSI, Switzerland
| | - Lai Chung Liu
- Uncharted Software, 600-2 Berkeley St., Toronto, M5A 4J5, ON, Canada
| | | | - Atsuhiro Miyawaki
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan
| | - Masaki Hada
- Tsukuba Research Center for Energy Materials Science, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Shinnosuke Nakano
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Ryoya Takahashi
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Samiran Banu
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Shin-Ya Koshihara
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Kazuyuki Takahashi
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan.
| | - Tadahiko Ishikawa
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan.
| | - R J Dwayne Miller
- Departments of Chemistry and Physics, University of Toronto, 80 St. George St., Toronto, M5S 3H6, ON, Canada.
| |
Collapse
|
2
|
Bento MA, Gomes T, Martins FF, Gil A, Ferreira LP, Barroso S, Gomes CSB, Garcia Y, Martinho PN. The role of intermolecular interactions in [Fe(X-salEen) 2]ClO 4 spin crossover complexes. Dalton Trans 2024; 53:8791-8802. [PMID: 38713065 DOI: 10.1039/d4dt00400k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Two new spin crossover (SCO) Fe(III) compounds were prepared, their structures were analysed and their magnetic properties were investigated. An exhaustive analysis of the effects of halogen substitution and aromatic ring functionalisation on the magnetic properties of non-solvated Fe(III) perchlorate complexes has been performed. Through comparative analysis, different magnetic profiles were found for the compounds studied, namely F (1), Cl (2), H (3), Br (4a, 4b), and I (5). Using tools like Hirshfeld analysis, the study revealed patterns in octahedral distortions and deviations from the ideal octahedral geometry. The SCO phenomenon as the conducting wire in this study, emphasises the influence of intermolecular interactions on the low spin (LS) to high spin (HS) transitions in these halogen-substituted complexes. The prevalence of H⋯H contributions has been demonstrated, albeit being the weakest and an inverse strength relationship in H⋯X interactions ranging from F to I. The findings not only interpret the intricate balance between halogen substitution, functionalisation, and intermolecular interactions in modulating magnetic properties but also direct future works in designing similar molecular systems.
Collapse
Affiliation(s)
- Marcos A Bento
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Tiago Gomes
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| | - Frederico F Martins
- BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Adrià Gil
- BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
- Departament de Química, Física i Ciències Ambientals i del Sòl, ETSEA - Escola Tècnica Superior d'Enginyeria Agrària, Universitat de Lleida, Av. de l'alcalde Rovira Roure, 191, E25198, Lleida, Catalunya, Spain
| | - Liliana P Ferreira
- Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
- Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Edifício C8, 1749-016 Lisboa, Portugal
| | - Sónia Barroso
- UCIBIO, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- i4HB, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Clara S B Gomes
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecular Chemistry, Materials and Catalysis (IMCN/MOST), Université Catholique de Louvain, Place L. Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Paulo N Martinho
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.
| |
Collapse
|
3
|
Chen FL, Sun YC, Liu XL, Li G, Zhang CC, Gao BH, Zhao Y, Wang XY. Spin Crossover in [Fe(qsal-5-Br q) 2] + Complexes with a Quinoline-Substituted Qsal Ligand. Inorg Chem 2024; 63:8750-8763. [PMID: 38693869 DOI: 10.1021/acs.inorgchem.4c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Using a quinoline substituted Qsal ligand, Hqsal-5-Brq (Hqsal-5-Brq = N-(5-bromo-8-quinolyl)salicylaldimine), four FeIII complexes, [Fe(qsal-5-Brq)2]A·CH3OH (Y = NO3- (1NO3), BF4- (2BF4), PF6- (3PF6), OTf- (4OTf), were prepared and characterized. Structure analysis revealed that complex 2BF4 contained two species (2BF4(P1̅) and 2BF4(C2/c)). In these compounds except 3PF6, the [Fe(qsal-5-Brq)2]+ cations form 1D chains through π-π interactions and other weak interactions. Adjacent chains are connected to form the 2D "Chain Layer" structures and 3D structures through various supramolecular interactions. For 3PF6, a "Dimer Chain" structure is formed from the loosely connected dimers. Magnetic studies revealed that compounds 1NO3 and 2BF4(P1̅) displayed abrupt hysteretic SCO with the transition temperature T1/2↓ = 235 K, T1/2↑ = 240 K for 1NO3 and T1/2↓ = 230 K, T1/2↑ = 235 K for 2BF4(P1̅), while compounds 3PF6 and 4OTf are in the HS state. Desolvation of the complexes significantly modifies their SCO properties: the desolvated 1NO3 and 2BF4 show a gradual SCO, desolvated 3PF6 undergoes a two-step SCO, and desolvated 4OTf exhibits a hysteretic transition. Overall, this work reported the FeIII-SCO complexes of the quinoline-substituted Hqsal ligand and highlighted the potential of these ligands for the development of interesting FeIII-SCO materials.
Collapse
Affiliation(s)
- Feng-Li Chen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Li Liu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Gang Li
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Cheng-Cheng Zhang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Bo-Hong Gao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| |
Collapse
|
4
|
Jeong AR, Park SR, Shin JW, Kim J, Tokunaga R, Hayami S, Min KS. Mononuclear Fe(III) complexes with 2,4-dichloro-6-((quinoline-8-ylimino)methyl)phenolate: synthesis, structure, and magnetic behavior. Dalton Trans 2024; 53:6809-6817. [PMID: 38545959 DOI: 10.1039/d3dt04385a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Three Fe(III)-based coordination complexes [Fe(dqmp)2](NO3)·H2O (1), [Fe(dqmp)2](BF4)·2CH3COCH3 (2), and [Fe(dqmp)2](ClO4) (3) were synthesized from Fe(NO3)3·9H2O/Fe(ClO4)3·xH2O, NaBF4, and 2,4-dichloro-6-((quinoline-8-ylimino)methyl)phenol (Hdqmp) in methanol/acetone and characterized. The structures of complexes 1-3 were determined via single-crystal X-ray crystallography at 100 K and room temperature, and their magnetic properties in the solid and solution forms were investigated. All complexes showed meridional structures with two tridentate dqmp- ligands coordinated with Fe(III) cations. In the solid state, complex 1 showed an abrupt and complete spin crossover at 225 K, whereas complexes 2 and 3 exhibited an incomplete spin crossover at 135 and 150 K, respectively. In a dimethylformamide solution, the complexes showed counterion-dependent spin transitions. In contrast to the solid state, in solution, complex 1 did not exhibit complete spin crossover. However, complexes 2 and 3 showed more complete spin transitions in solutions than in the solid state. The relaxation times, T1 and T2, for 1 and 2 were determined and both increased with temperature from 220 to 380 K. The T1 of 1 was larger than that of 2 at 380 K, and the T1 values were larger than the T2 values.
Collapse
Affiliation(s)
- Ah Rim Jeong
- Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Si Ra Park
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jong Won Shin
- Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Jihyun Kim
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Ryuya Tokunaga
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Shinya Hayami
- Department of Chemistry, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kil Sik Min
- Department of Chemistry Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| |
Collapse
|
5
|
Kaushik K, Mehta S, Das M, Ghosh S, Kamilya S, Mondal A. Stimuli-responsive magnetic materials: impact of spin and electronic modulation. Chem Commun (Camb) 2023; 59:13107-13124. [PMID: 37846652 DOI: 10.1039/d3cc04268e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
Addressing molecular bistability as a function of external stimuli, especially in spin-crossover (SCO) and metal-to-metal electron transfer (MMET) systems, has seen a surge of interest in the field of molecule-based magnetic materials due to their enormous potential in various technological applications such as molecular spintronics, memory and electronic devices, switches, sensors, and many more. The fine-tuning of molecular components allow the design and synthesis of materials with tailored properties for these vast applications. In this Feature Article, we discuss a part of our research work into this broad topic, pertaining to the recent discoveries in the field of switchable molecular magnetic materials based on SCO and MMET systems, along with some historical background of the area and related accomplishments made in recent years.
Collapse
Affiliation(s)
- Krishna Kaushik
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sakshi Mehta
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Mayurika Das
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sounak Ghosh
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Sujit Kamilya
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| | - Abhishake Mondal
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Sir C V Raman Road, Bangalore 560012, India.
| |
Collapse
|
6
|
Díaz-Torres R, Gómez-Coca S, Ruiz E, Harding P, Harding DJ. Improving spin crossover characteristics in heteroleptic [Fe III(qsal-5-I)(qsal-5-OMe)]A complexes. Dalton Trans 2023. [PMID: 37908189 DOI: 10.1039/d3dt02503a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
A family of heteroleptic spin crossover (SCO) [FeIII(qsal-5-I)(qsal-5-OMe)]A·sol (qsal-5-X = 5-X-2-[(8-quinolylimino)methyl]phenolate; A = NO3-1 sol = 2MeOH, NCS-2 sol = 0.75MeOH·1.3H2O, BF4-3 sol = MeOH, OTf-4, sol = MeOH) complexes have been synthesized. Most of the complexes exhibit gradual SCO, with the exception of NCS, which is principally high spin. In contrast, the OTf complex shows an abrupt hysteretic SCO (35 K) after solvent loss. The magnetic properties of this complex are significantly improved in comparison to the related homoleptics, [Fe(qsal-I)2]OTf 5 (hysteresis, 8 K) and [Fe(qsal-5-OMe)2]OTf·CH2Cl26 (gradual SCO). Structural studies reveal that slight changes in the crystal packing cause stronger interactions improving the cooperativity. These findings are supported by DFT calculations using the r2SCAN functional in which the calculated structures show that SCO from the LS to the HS state causes pronounced scissoring of the 1D π-π chains and substantial changes in their relative orientation following loss of MeOH.
Collapse
Affiliation(s)
- Raúl Díaz-Torres
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Silvia Gómez-Coca
- Departament de Química Inorgànica i Orgànica, Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Eliseo Ruiz
- Departament de Química Inorgànica i Orgànica, Institut de Recerca de Química Teòrica i Computacional, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Phimphaka Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
| | - David J Harding
- School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
| |
Collapse
|
7
|
Sheng HJ, Xia CC, Zhang XY, Zhang CC, Ji WJ, Zhao Y, Wang XY. Anion Modified Spin Crossover in [Fe(qsal-4-F)] + Complexes with a 4-Position Substituted Qsal Ligand. Inorg Chem 2022; 61:12726-12735. [PMID: 35905478 DOI: 10.1021/acs.inorgchem.2c01795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four iron(III) complexes, [Fe(qsal-4-F)2]Y·sol (Hqsal-4-F = 4-fluoro-N-(8-quinolyl)salicylaldimine; Y = NO3-, sol = 0.91MeOH·0.57H2O (1NO3); Y = PF6- (2PF6); Y = BF4- (3BF4); Y = OTf-, sol =1.5MeOH (4OTf)), with a new 4-position substituted qsal type ligand Hqsal-4-F have been synthesized and structurally and magnetically characterized. Complexes 1NO3-3BF4 consist of 1D chains formed by the [Fe(qsal-4-F)2]+ cations connected by π-π and C-H···O interactions, which are further linked by more weak interactions to form 2D layers and 3D networks. On the other hand, complex 4OTf has a structure of nearly isolated 1D column where the [Fe(qsal-4-F)2]+ cations are connected by π-π, C-H···π, and C-F···π interactions. Magnetic studies revealed the occurrence of two-step symmetry-breaking SCO in 1NO3 and two-step gradual SCO in 2PF6. Complex 3BF4 undergoes a gradual SCO, whereas 4OTf remains almost high-spin. The smaller anions tend to stabilize the low-spin state, while larger anions tend to stabilize the high-spin state. In addition, the intermediate spin state of 1NO3 could be thermally trapped by quenching from the high temperature, thereby kinetically suppressing the spin transition to the full low-spin state. This work represents a good example that the position of the substituent and the anions plays critical roles in the preparation of SCO materials with tunable properties.
Collapse
Affiliation(s)
- Hui-Juan Sheng
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Cheng-Cai Xia
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Yu Zhang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Cheng-Cheng Zhang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wen-Jie Ji
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| |
Collapse
|
8
|
Qin CY, Zhao SZ, zhou HW, Li YH, Wang S. Effect of halogen substituents on the intermolecular interactions and magnetic properties of Mn(III) complexes. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
9
|
Correlation between Supramolecular Connectivity and Magnetic Behaviour of [FeIII(5-X-qsal)2]+-Based Salts Prone to Exhibit SCO Transition. MAGNETOCHEMISTRY 2021. [DOI: 10.3390/magnetochemistry8010001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present an extensive study to determine the relationship between structural features of spin crossover (SCO) systems based on N-(8-quinolyl)salicylaldimine (qsal) ligand derivatives and their magnetic properties. Thirteen new compounds with general formula [FeIII(5-X-qsal)2]+ (X = H, F, Cl, Br and I) coupled to Cl−, ClO4−, SCN−, PF6−, BF4− and BPh4− anions were prepared and magnetically characterized. The structure/properties correlations observed in these compounds were compared to those of salts with the same [FeIII(qsal-X)2]+ cations previously reported in the literature. These cations favour the LS configuration in compounds with the weakest connectivity. As connectivity increases most of them present HS states at room temperature and structures may be described as arrangements of parallel layers of interacting cation dimers. All the compounds based on these cations undergoing complete SCO transitions within the 4–300 K temperature range have high intralayer connectivity. If, however, the interlayer connectivity becomes very strong they remain blocked in the HS or in the LS state. The SCO transition may be affected by the slightest change of solvent molecules content, disorder or even crystallinity of the sample and it remain difficult to predict which kind of ligand substituent should be selected to obtain compounds with the desired connectivity.
Collapse
|
10
|
Yu ZM, Zhao SZ, Wang YT, Xu PY, Qin CY, Li YH, Zhou XH, Wang S. Anion-driven supramolecular modulation of spin-crossover properties in mononuclear iron(III) Schiff-base complexes. Dalton Trans 2021; 50:15210-15223. [PMID: 34622889 DOI: 10.1039/d1dt02394b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Fe(III) complexes [Fe(5-F-sal-N-1,4,7,10)]Y (Y = PF6- for 1, Y = ClO4- for 2, Y = I- for 3 and Y = NO3- for 4) have been prepared. Single-crystal X-ray crystallographic studies show that complex 1 crystallizes in the orthorhombic Pna21 space group and complexes 2-4 have an isomorphous structure and crystallize in the same monoclinic space group, P21/n. Complexes 2-4 have two independent molecules (Fe1 and Fe2) in the unit cell. Magnetic susceptibility measurements demonstrated that complexes 1 and 3 showed a gradual one-step SCO behavior (T1/2 for 1 = 177 K and for 3 = 227 K) without thermal hysteresis. The magnetic behavior of 2 shows an incomplete two-step SCO process at T1/2 = 114 K and 170 K, respectively, while 4 is in a high-spin state at all measured temperatures. A careful evaluation of the supramolecular structures of these complexes revealed correlation between the supramolecular packing forces and their SCO behavior. The crystal structure of 1 consists of a three-dimensional (3D) extended network constructed from N-H⋯F and C-H⋯F hydrogen bonds, and C-H⋯π and C⋯C short contacts. In compounds 2-4, the crystal packing is governed by C⋯C, C-H⋯π and p-π interactions for the Fe1 centers and by C-H⋯π/O interactions for the Fe2 centers, which form 1D chains. Additional interactions (C-H⋯F and N-H⋯O/I) connect the neighboring chains and planes to form a complex supramolecular network. The anion⋯π interactions in 4 provide a means for preventing SCO occurring at low temperatures. This suggests that the supramolecular connectivity of the anions influences the magnetic properties.
Collapse
Affiliation(s)
- Zong-Mei Yu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Sheng-Ze Zhao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Yu-Ting Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Peng-Yu Xu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Chun-Yan Qin
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Yong-Hua Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Xin-Hui Zhou
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| | - Shi Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China.
| |
Collapse
|
11
|
Liu ZK, Yao ZS, Tao J. Halogen-Substituted Spin-Crossover Fe(III) Compounds with Photoresponsive Properties. Inorg Chem 2021; 60:10291-10301. [PMID: 34236188 DOI: 10.1021/acs.inorgchem.1c00727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Halogen-substituted Fe(III) compounds, [Fe(HphsalpmX)2]PTFB (HphsalpmX = 5-X-(R,S)-((phenyl(2-pyridyl)methylimino)methyl)phenol, PTFB = phenyltrifluoroborate; X = F for 1, Cl for 2, Br for 3) and [Fe(HphsalpmX)2]PTFB·MeOH (X = I for 4·MeOH), were synthesized. Compounds 1, 4·MeOH, and its desolvated form 4 exhibited an invariant high-spin state in the whole temperature range, while 2 and 3 underwent gradual, nonhysteretic, and incomplete spin crossover (SCO) with transition temperatures (TC) of 153 and 220 K, respectively. Interestingly, the SCO-active compounds 2 and 3 showed light-induced excited spin-state trapping (LIESST) effects at 10 K, and light-induced reversible ON/OFF switching behaviors were realized by alternately using 880 and 1064 nm light, while the thermally inert compound 4·MeOH unexpectedly showed a reverse-LIESST effect. These results may help to design and synthesize new photoresponsive SCO Fe(III) compounds for the development of switchable materials.
Collapse
Affiliation(s)
- Zhi-Kun Liu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China
| | - Zi-Shuo Yao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology, Beijing 102488, People's Republic of China
| |
Collapse
|
12
|
Wongsuwan S, Chatwichien J, Pinchaipat B, Kumphune S, Harding DJ, Harding P, Boonmak J, Youngme S, Chotima R. Synthesis, characterization and anticancer activity of Fe(II) and Fe(III) complexes containing N-(8-quinolyl)salicylaldimine Schiff base ligands. J Biol Inorg Chem 2021; 26:327-339. [PMID: 33606116 DOI: 10.1007/s00775-021-01857-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/04/2021] [Indexed: 01/03/2023]
Abstract
A series of Fe(II) complexes (1-4) and Fe(III) complexes (5-8) from Fe(II)/(III) chloride and N-(8-quinolyl)-X-salicylaldimine Schiff base ligands (Hqsal-X2/X: X = Br, Cl) were successfully synthesized and characterized by spectroscopic (FT-IR, 1H-NMR), mass spectrometry, thermogravimetric analysis (TGA), and single crystal X-ray crystallographic techniques. The interaction of complexes 1-8 with calf thymus DNA (CT-DNA) was determined by UV-Vis and fluorescence spectroscopy. The complexes exhibited good DNA-binding activity via intercalation. The molecular docking between a selected complex and DNA was also investigated. The in vitro anticancer activity of the Schiff base ligands and their complexes were screened against the A549 human lung adenocarcinoma cell line. The complexes showed anticancer activity toward A549 cancer cells while the free ligands and iron chloride salts showed no inhibitory effects at 100 µM. In this series, complex [Fe(qsal-Cl2)2]Cl 6 showed the highest anticancer activity aginst A549 cells (IC50 = 10 µM). This is better than two well-known anticancer agents (Etoposide and Cisplatin). Furthermore, the possible mechanism for complexes 1-8 penetrating A549 cells through intracellular ROS generation was investigated. The complexes containing dihalogen substituents 1, 2, 5, and 6 can increase ROS in A549 cells, leading to DNA or macromolecular damage and cell-death induction.
Collapse
Affiliation(s)
- Sutthida Wongsuwan
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Jaruwan Chatwichien
- Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok, 10210, Thailand
| | - Bussaba Pinchaipat
- Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
| | - Sarawut Kumphune
- Integrative Biomedical Research Unit (IBRU), Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand
- Biomedical Engineering Institute (BMEI), Chiang Mai University, Chiang Mai, 50200, Thailand
| | - David J Harding
- Functional Materials and Nanotechnology Center of Excellence, Walailak University, Thasala, 80160, Nakhon Si Thammarat, Thailand
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Center of Excellence, Walailak University, Thasala, 80160, Nakhon Si Thammarat, Thailand
| | - Jaursup Boonmak
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sujittra Youngme
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Ratanon Chotima
- Department of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand.
| |
Collapse
|
13
|
Craze AR, Zenno H, Pfrunder MC, McMurtrie JC, Hayami S, Clegg JK, Li F. Supramolecular Modulation of Spin Crossover in an Fe(II) Dinuclear Triple Helicate. Inorg Chem 2021; 60:6731-6738. [DOI: 10.1021/acs.inorgchem.1c00553] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander R. Craze
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Hikaru Zenno
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, Japan
| | - Michael C. Pfrunder
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia
- Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane, QLD 4001, Australia
| | - John C. McMurtrie
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia
- Centre for Materials Science, Queensland University of Technology, 2 George St, Brisbane, QLD 4001, Australia
| | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto, Japan
| | - Jack K. Clegg
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Feng Li
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia
| |
Collapse
|
14
|
Dey B, Gupta A, Kapurwan S, Konar S. Study of Spin Crossover Property of a Series of X‐OMe‐SalEen (X=6, 5 and 4) Based Fe(III) Complexes. ChemistrySelect 2020. [DOI: 10.1002/slct.202003135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bijoy Dey
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal by-pass road Bhauri Bhopal 462066 India
| | - Arindam Gupta
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal by-pass road Bhauri Bhopal 462066 India
| | - Sandhya Kapurwan
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal by-pass road Bhauri Bhopal 462066 India
| | - Sanjit Konar
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal by-pass road Bhauri Bhopal 462066 India
| |
Collapse
|
15
|
Ivanova TA, Ovchinnikov IV, Turanova OA, Bazan LV, Shustov VA, Batulin RG, Cherosov MA. Spin crossover properties of Fe(III) complexes in [Fe (bzacen)(tvp)]BPh 4 ·nSolv chain structures: EPR study. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:949-956. [PMID: 32530544 DOI: 10.1002/mrc.5064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 06/07/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
Two types of Fe(III) polynuclear iron(III) 1D-chain coordination compounds of the general formula [Fe (L)(tvp)]BPh4 nSolv, where L = dianion of N,N'-ethylenebis (benzoylacetylacetone)2,2'-imine (bzacen), tvp = 1,2-di(4-pyridyl)ethylene were synthesized and studied by the electron paramagnetic resonance (EPR) and magnetic susceptibility methods in the temperature range (100-300) К. Two types of spin-variable complexes are formed depending on the time of precipitation of the complexes from the same solution leading to differently solvated species. They have different characteristics of the local ligand field and the spin transition behavior. The thermodynamic parameters of spin transitions were determined from the temperature dependence of the EPR signals integral intensity. The energy levels splitting values obtained by analyzing g-factors of low-spin Fe(III) centers evidenced not only on the crucial role of low-symmetry distortions on the principal possibility of spin-crossover processes, but also on the temperature peculiarities of spin transitions.
Collapse
Affiliation(s)
- Tatyana A Ivanova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - Igor V Ovchinnikov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - Olga A Turanova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - Leah V Bazan
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - Vladimir A Shustov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | | | | |
Collapse
|
16
|
Díaz-Torres R, Phonsri W, Murray KS, Liu L, Ahmed M, Neville SM, Harding P, Harding DJ. Spin Crossover in Iron(III) Quinolylsalicylaldiminates: The Curious Case of [Fe(qsal-F)2](Anion). Inorg Chem 2020; 59:13784-13791. [DOI: 10.1021/acs.inorgchem.0c02201] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Raúl Díaz-Torres
- Functional Materials and Nanotechnology Centre of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| | - Wasinee Phonsri
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Keith S. Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Lujia Liu
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Institute of Fundamental Sciences, Massey University, Palmerston North 0632, New Zealand
| | - Manan Ahmed
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Suzanne M. Neville
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Centre of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| | - David J. Harding
- Functional Materials and Nanotechnology Centre of Excellence, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand
| |
Collapse
|
17
|
Dey B, Mondal A, Konar S. Effect of Ligand Field Strength on the Spin Crossover Behaviour in 5‐X‐SalEen (X=Me, Br and OMe) Based Fe(III) Complexes. Chem Asian J 2020; 15:1709-1721. [DOI: 10.1002/asia.202000156] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/14/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Bijoy Dey
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal bypass road, Bhauri Bhopal 462066, MP India
| | - Arpan Mondal
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal bypass road, Bhauri Bhopal 462066, MP India
| | - Sanjit Konar
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal bypass road, Bhauri Bhopal 462066, MP India
| |
Collapse
|
18
|
Al‐Azzani MA, Al‐Mjeni F, Mitsuhashi R, Mikuriya M, Al‐Omari IA, Robertson CC, Bill E, Shongwe MS. Unusual Magneto‐Structural Features of the Halo‐Substituted Materials [Fe
III
(5‐X‐salMeen)
2
]Y: a Cooperative [HS‐HS]↔[HS‐LS] Spin Transition. Chemistry 2020; 26:4766-4779. [DOI: 10.1002/chem.201904744] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Indexed: 01/21/2023]
Affiliation(s)
- Mariam A. Al‐Azzani
- Department of ChemistryCollege of ScienceSultan Qaboos University Private Bag 36, Al-Khod 123 Muscat Sultanate of Oman
| | - Faizah Al‐Mjeni
- Department of ChemistryCollege of ScienceSultan Qaboos University Private Bag 36, Al-Khod 123 Muscat Sultanate of Oman
| | - Ryoji Mitsuhashi
- School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda 669-1337 Japan
| | - Masahiro Mikuriya
- School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda 669-1337 Japan
| | - Imaddin A. Al‐Omari
- Department of PhysicsCollege of ScienceSultan Qaboos University Private Bag 36, Al-Khod 123 Muscat Sultanate of Oman
| | | | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion Stiftstrasse 34–36 45470 Mülheim an der Ruhr Germany
| | - Musa S. Shongwe
- Department of ChemistryCollege of ScienceSultan Qaboos University Private Bag 36, Al-Khod 123 Muscat Sultanate of Oman
| |
Collapse
|
19
|
Spin Crossover in 3D Metal Centers Binding Halide-Containing Ligands: Magnetism, Structure and Computational Studies. SUSTAINABILITY 2020. [DOI: 10.3390/su12062512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The capability of a given substance to change its spin state by the action of a stimulus, such as a change in temperature, is by itself a very challenging property. Its interest is increased by the potential applications and the need to find sustainable functional materials. 3D transition metal complexes, mainly with octahedral geometry, display this property when coordinated to particular sets of ligands. The prediction of this behavior has been attempted by many authors. It is, however, made very difficult because spin crossover (SCO), as it is called, occurs most often in the solid state, where besides complexes, counter ions, and solvents are also present in many cases. Intermolecular interactions definitely play a major role in SCO. In this review, we decided to analyze SCO in mono- and binuclear transition metal complexes containing halogens as ligands or as substituents of the ligands. The aim was to try and find trends in the properties which might be correlated to halogen substitution patterns. Besides a revision of the properties, we analyzed structures and other information. We also tried to build a simple model to run Density Functional Theory (DFT) calculations and calculate several parameters hoping to find correlations between calculated indices and SCO data. Although there are many experimental studies and single-crystal X-ray diffraction structures, there are only few examples with the F, Cl, Br and series. When their intermolecular interactions were not very different, T1/2 (temperature with 50% high spin and 50% low spin states) usually increased with the calculated ligand field parameter (Δoct) within a given family. A way to predict SCO remains elusive.
Collapse
|
20
|
Turanova OA, Volkov MY, Frolova EN, Bazan L, Garifzianova GG, Gafiyatullin LG, Ovchinnikov IV, Turanov AN. Effect of the chemical structure of an equatorial ligand on the spin crossover properties of the Fe(III) complex with 4-styrylpyridine axial ligands. J Chem Phys 2020; 152:014306. [PMID: 31914761 DOI: 10.1063/1.5124369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
In order to study the effect of the chemical structure of the equatorial ligand on the spin state of the Fe(iii) ion in complexes with invariable photoisomerizable 4-styrylpyridine axial ligands and different tetradentate Schiff bases, several new Fe(iii) complexes have been first synthesized, characterized, and studied by UV-vis, NMR, and EPR spectroscopies. The general chemical formula of the complexes is [Fe(SB)Sp2]BPh4·MeOH, where Sp is trans-4-styrylpyridine and SB are dianions of Schiff bases: salen, bzacen, and acen [salen = N,N'-ethylenebis(salicylaldimine) 1, acen = N,N'-ethylenebis(acetylacetonylideneimine) 2, and H2bzacen = N,N'-ethylenebis(benzoylacetonylideneimine) 3]. The results of the EPR and NMR measurements of the complexes both in the solid state and in solutions showed that the more methyl groups and less aromatic rings in the equatorial ligand, the more abrupt spin-crossover was observed in the complex. The dependence of the magnetic properties of the complexes on the state of matter and the presence of a solvent (powder, liquid solutions, and vitrified solutions) are noted.
Collapse
Affiliation(s)
- O A Turanova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - M Yu Volkov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - E N Frolova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - L Bazan
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | | | - L G Gafiyatullin
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - I V Ovchinnikov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| | - A N Turanov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia
| |
Collapse
|
21
|
Vela S, Fumanal M, Cirera J, Ribas-Arino J. Thermal spin crossover in Fe(ii) and Fe(iii). Accurate spin state energetics at the solid state. Phys Chem Chem Phys 2020; 22:4938-4945. [DOI: 10.1039/d0cp00162g] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Parametrization of PBE+U under the D3 and D3-BJ dispersion corrections to study FeII and FeIII-based Spin Crossover complexes.
Collapse
Affiliation(s)
- Sergi Vela
- Laboratory for Computational Molecular Design
- Institute of Chemical Sciences and Engineering
- EPFL
- CH-1015 Lausanne
- Switzerland
| | - Maria Fumanal
- Laboratoire de Chimie Quantique
- UMR 7111
- CNRS-Université de Strasbourg
- F-67000 Strasbourg
- France
| | - Jordi Cirera
- Departament de Química Inorganica i Orgànica and IQTCUB
- Universitat de Barcelona
- Barcelona
- Spain
| | - Jordi Ribas-Arino
- Departament de Ciència de Materials i Química Física and IQTCUB
- Universitat de Barcelona
- Barcelona
- Spain
| |
Collapse
|
22
|
Sundaresan S, Kitchen JA, Brooker S. Hydrophobic tail length in spin crossover active iron( ii) complexes predictably tunes T½ in solution and enables surface immobilisation. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01478k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Linear correlation of the hydrophobic alkyl tail length R employed in [FeII(LH-OR)(NCBH3)2] with the spin crossover switching temperature is a very convenient method of predictably tuning the iron(ii) spin state.
Collapse
Affiliation(s)
- Sriram Sundaresan
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| | - Jonathan A. Kitchen
- School of Natural and Computational Sciences
- Massey University Auckland
- New Zealand
| | - Sally Brooker
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin 9054
- New Zealand
| |
Collapse
|
23
|
High-Temperature Cooperative Spin Crossover Transitions and Single-Crystal Reflection Spectra of [FeIII(qsal)2](CH3OSO3) and Related Compounds. CRYSTALS 2019. [DOI: 10.3390/cryst9020081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
New Fe(III) compounds from qsal ligand, [Fe(qsal)2](CH3OSO3) (1) and [Fe(qsal)2](CH3SO3)·CH3OH (3), along with known compound, [Fe(qsal)2](CF3SO3) (2), were obtained as large well-shaped crystals (Hqsal = N-(8-quinolyl)salicylaldimine). The compounds 1 and 2 were in the low-spin (LS) state at 300 K and exhibited a cooperative spin crossover (SCO) transition with a thermal hysteresis loop at higher temperatures, whereas 3 was in the high-spin (HS) state below 300 K. The optical conductivity spectra for 1 and 3 were calculated from the single-crystal reflection spectra, which were, to the best of our knowledge, the first optical conductivity spectra of SCO compounds. The absorption bands for the LS and HS [Fe(qsal)2] cations were assigned by time-dependent density functional theory calculations. The crystal structures of 1 and 2 consisted of a common one-dimensional (1D) array of the [Fe(qsal)2] cation, whereas that of 3 had an unusual 1D arrangement by π-stacking interactions which has never been reported. The crystal structures in the high-temperature phases for 1 and 2 indicate that large structural changes were triggered by the motion of counter anions. The comparison of the crystal structures of the known [Fe(qsal)2] compounds suggests the significant role of a large non-spherical counter-anion or solvate molecule for the total lattice energy gain in the crystal of a charged complex.
Collapse
|
24
|
Gao WQ, Meng YS, Liu CH, Pan Y, Liu T, Zhu YY. Spin crossover and structural phase transition in homochiral and heterochiral Fe[(pybox)2]2+ complexes. Dalton Trans 2019; 48:6323-6327. [DOI: 10.1039/c8dt04893b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin crossover and structural phase transition were discovered in three pairs of homochiral and heterochiral [Fe(pybox)2]2+ diastereomers.
Collapse
Affiliation(s)
- Wan-Qing Gao
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Chun-Hua Liu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Yao Pan
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian 116024
- China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology and Anhui Key Laboratory of Advanced Functional Materials and Devices
- Hefei 230009
- China
- State Key Laboratory of Fine Chemicals
| |
Collapse
|
25
|
Lazaro SE, Alkaş A, Lee SJ, Telfer SG, Murray KS, Phonsri W, Harding P, Harding DJ. Abrupt spin crossover in iron(iii) complexes with aromatic anions. Dalton Trans 2019; 48:15515-15520. [DOI: 10.1039/c9dt02373a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two iron(iii) complexes, [Fe(qsal-X)2]OTs·nH2O, are found to exhibit abrupt spin crossover with the spin transition temperature substituent dependent, and X⋯O halogen bonds linking the spin centres.
Collapse
Affiliation(s)
- Sharon E. Lazaro
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
| | - Adil Alkaş
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- New Zealand
| | - Seok J. Lee
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- New Zealand
| | - Shane G. Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology
- Institute of Fundamental Sciences
- Massey University
- New Zealand
| | | | | | - Phimphaka Harding
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
| | - David J. Harding
- Functional Materials and Nanotechnology Center of Excellence
- Walailak University
- Thasala
- Thailand
| |
Collapse
|
26
|
|
27
|
Solvent Effects on the Spin-Transition in a Series of Fe(II) Dinuclear Triple Helicate Compounds. CRYSTALS 2018. [DOI: 10.3390/cryst8100376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This work explores the effect of lattice solvent on the observed solid-state spin-transition of a previously reported dinuclear Fe(II) triple helicate series 1–3 of the general form [FeII2L3](BF4)4(CH3CN)n, where L is the Schiff base condensation product of imidazole-4-carbaldehyde with 4,4-diaminodiphenylmethane (L1), 4,4′-diaminodiphenyl sulfide (L2) and 4,4′-diaminodiphenyl ether (L3) respectively, and 1 is the complex when L = L1, 2 when L = L2 and 3 when L = L3 (Craze, A.R.; Sciortino, N.F.; Bhadbhade, M.M.; Kepert, C.J.; Marjo, C.E.; Li, F. Investigation of the Spin Crossover Properties of Three Dinuclear Fe(II) Triple Helicates by Variation of the Steric Nature of the Ligand Type. Inorganics. 2017, 5 (4), 62). Desolvation of 1 and 2 during measurement resulted not only in a decrease in T1/2 and completeness of spin-crossover (SCO) but also a change in the number of steps in the spin-profile. Compounds 1 and 2 were observed to change from a two-step 70% complete transition when fully solvated, to a single-step half complete transition upon desolvation. The average T1/2 value of the two-steps in the solvated materials was equivalent to the single T1/2 of the desolvated sample. Upon solvent loss, the magnetic profile of 3 experienced a transformation from a gradual SCO or weak antiferromagnetic interaction to a single half-complete spin-transition. Variable temperature single-crystal structures are presented and the effects of solvent molecules are also explored crystallographically and via a Hirshfeld surface analysis. The spin-transition profiles of 1–3 may provide further insight into previous discrepancies in dinuclear triple helicate SCO research reported by the laboratories of Hannon and Gütlich on analogous systems (Tuna, F.; Lees, M. R.; Clarkson, G. J.; Hannon, M. J. Readily Prepared Metallo-Supramolecular Triple Helicates Designed to Exhibit Spin-Crossover Behaviour. Chem. Eur. J. 2004, 10, 5737–5750 and Garcia, Y.; Grunert, C. M.; Reiman, S.; van Campenhoudt, O.; Gütlich, P. The Two-Step Spin Conversion in a Supramolecular Triple Helicate Dinuclear Iron(II) Complex Studied by Mössbauer Spectroscopy. Eur. J. Inorg. Chem. 2006, 3333–3339).
Collapse
|
28
|
Craze AR, Howard-Smith KJ, Bhadbhade MM, Mustonen O, Kepert CJ, Marjo CE, Li F. Investigation of the High-Temperature Spin-Transition of a Mononuclear Iron(II) Complex Using X-ray Photoelectron Spectroscopy. Inorg Chem 2018; 57:6503-6510. [DOI: 10.1021/acs.inorgchem.8b00576] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Alexander R. Craze
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751, Australia
| | - Kyle J. Howard-Smith
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751, Australia
| | - Mohan M. Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Outi Mustonen
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Cameron J. Kepert
- School of Chemistry, University of Sydney, Sydney, New South Wales 2006, Australia
| | - Christopher E. Marjo
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Feng Li
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751, Australia
| |
Collapse
|
29
|
Investigation of the Spin Crossover Properties of Three Dinulear Fe(II) Triple Helicates by Variation of the Steric Nature of the Ligand Type. INORGANICS 2017. [DOI: 10.3390/inorganics5040062] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
30
|
Laverick RJ, Carter AB, Klein HA, Fitzpatrick AJ, Keene TD, Morgan GG, Kitchen JA. Synthesis and characterisation of Fe(III) and Co(III) complexes of thiazole-containing thiosemicarbazone ligands. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
31
|
Phonsri W, Macedo DS, Vignesh KR, Rajaraman G, Davies CG, Jameson GNL, Moubaraki B, Ward JS, Kruger PE, Chastanet G, Murray KS. Halogen Substitution Effects on N
2
O Schiff Base Ligands in Unprecedented Abrupt Fe
II
Spin Crossover Complexes. Chemistry 2017; 23:7052-7065. [DOI: 10.1002/chem.201700232] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Wasinee Phonsri
- School of Chemistry, Building 23 Monash University Clayton Victoria 3800 Australia
| | - David S. Macedo
- School of Chemistry, Building 23 Monash University Clayton Victoria 3800 Australia
| | | | - Gopalan Rajaraman
- Department of Chemistry Indian Institute of Technology Mumbai 400076 India
| | - Casey G. Davies
- Department of Chemistry MacDiarmid Institute for Advanced, Materials and Nanotechnology University of Otago Dunedin 9054 New Zealand
| | - Guy N. L. Jameson
- Department of Chemistry MacDiarmid Institute for Advanced, Materials and Nanotechnology University of Otago Dunedin 9054 New Zealand
| | - Boujemaa Moubaraki
- School of Chemistry, Building 23 Monash University Clayton Victoria 3800 Australia
| | - Jas S. Ward
- Department of Chemistry MacDiarmid Institute for Advanced, Materials and Nanotechnology University of Canterbury Private Bag 4800 Christchurch 8041 New Zealand
| | - Paul E. Kruger
- Department of Chemistry MacDiarmid Institute for Advanced, Materials and Nanotechnology University of Canterbury Private Bag 4800 Christchurch 8041 New Zealand
| | - Guillaume Chastanet
- CNRS Université de Bordeaux, ICMCB 87 avenue du Dr. A. Schweitzer Pessac 33608 France
| | - Keith S. Murray
- School of Chemistry, Building 23 Monash University Clayton Victoria 3800 Australia
| |
Collapse
|
32
|
Phonsri W, Harding P, Liu L, Telfer SG, Murray KS, Moubaraki B, Ross TM, Jameson GNL, Harding DJ. Solvent modified spin crossover in an iron(iii) complex: phase changes and an exceptionally wide hysteresis. Chem Sci 2017; 8:3949-3959. [PMID: 28553537 PMCID: PMC5433504 DOI: 10.1039/c6sc05317c] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 03/20/2017] [Indexed: 12/01/2022] Open
Abstract
Solvent effects in a series of Fe(iii) spin crossover (SCO) complexes [Fe(qsal-I)2]OTf·sol (sol = MeOH 1, EtOH 2, n-PrOH 3, i-PrOH 4, acetone 5 and MeCN 6) are explored. SCO is abrupt in 1 (following MeOH loss) and 2, gradual for 3 (T1/2 = 199 K) and 4 (T1/2 = 251 K) and incomplete, even up to 350 K, for 5 and 6. In [Fe(qsal-I)2]OTf SCO occurs at T1/2↓ = 225 K and T1/2↑ = 234 K (ΔT = 9 K), while aged samples of 2 exhibit an exceptionally wide hysteresis of 80 K (T1/2↓ = 139 K and T1/2↑ = 219 K). In contrast, fresh samples of 2 exhibit stepped SCO with hysteresis varying from 2 to 42 K. VT-PXRD (variable temperature powder X-ray diffraction) studies indicate a new phase, 2b, is formed upon cooling below 180 K along with a minor LS phase 2c. Phase 2c and the HS phase 2a undergo a spin transition at T1/2↓ = 180 K and T1/2↑ = 215 K with phase 2b exhibiting two-step SCO. Structural studies in both spin states, except 6, show the cations are linked through extensive π-π interactions to form 1D chains. A combination of P4AE (parallel fourfold aryl embrace) and I···X (X = I, O, π) interactions create tightly packed 3D supramolecular networks. This study emphasizes that while solvent may result in only small structural changes SCO characteristics can be impacted dramatically.
Collapse
Affiliation(s)
- Wasinee Phonsri
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech) , Walailak University , Thasala , Nakhon Si Thammarat 80160 , Thailand .
| | - Phimphaka Harding
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech) , Walailak University , Thasala , Nakhon Si Thammarat 80160 , Thailand .
| | - Lujia Liu
- MacDiarmid Institute for Advanced Materials and Nanotechnology , Institute of Fundamental Sciences , Massey University , Palmerston North , New Zealand
| | - Shane G Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology , Institute of Fundamental Sciences , Massey University , Palmerston North , New Zealand
| | - Keith S Murray
- School of Chemistry , Monash University , Clayton , Melbourne , Victoria 3800 , Australia
| | - Boujemaa Moubaraki
- School of Chemistry , Monash University , Clayton , Melbourne , Victoria 3800 , Australia
| | - Tamsyn M Ross
- Australian Synchrotron , 800 Blackburn Rd , Clayton , Victoria 3168 , Australia
| | - Guy N L Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , PO Box 56 , Dunedin , 9054 , New Zealand
| | - David J Harding
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech) , Walailak University , Thasala , Nakhon Si Thammarat 80160 , Thailand .
| |
Collapse
|
33
|
Hathwar VR, Stingaciu M, Richter B, Overgaard J, Iversen BB. Variable-temperature structural studies on valence tautomerism in cobalt bis(dioxolene) molecular complexes. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2017; 73:304-312. [PMID: 28362295 DOI: 10.1107/s2052520616019235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/02/2016] [Indexed: 06/07/2023]
Abstract
A variable-temperature single-crystal structural study of five valence tautomeric cobalt molecular complexes, CoII(3,5-DBSQ)2(DBPy)2 (1), CoII(3,5-DBSQ)2(DBPy)2·1.33C7H8 (1S), CoII(3,5-DBSQ)2(DCPy)2·C7H8 (2S), CoII(3,5-DBSQ)2(TBPy)2 (3) and CoII(3,5-DBSQ)2(TCPy)2 (4) (S = toluene, 3,5-DBSQ = 3,5-di-tert-butylsemiquinonate, DBPy = 3,5-dibromopyridine, DCPy = 3,5-dichloropyridine, TBPy = 3,4,5-tribromopyridine and TCPy = 3,4,5-trichloropyridine) is reported. The re-crystallization of (1S) in toluene at 277 K resulted in a concomitant formation of a solvent-free polymorph, CoII(3,5-DBSQ)2(DBPy)2 (1). Thermally induced valence tautomerism (VT) is observed only in (1S), (1) and (2S) [hs-CoII(3,5-DBSQ)2L2 ↔ ls-CoIII(3,5-DBSQ)(3,5-DBCat)L2 (hs = high spin, ls = low spin, 3,5-DBCat = 3,5-di-tert-butylcatecholate)], whereas (3) and (4) remain locked in the hs-CoII(3,5-DBSQ)2 state during cooling of the sample. Multi-temperature single-crystal studies demonstrate the change in cobalt coordination environment during the VT conversion. The non-solvated compound (1) shows a sharp VT transition (T1/2 ∼ 245 K with ΔT ∼ 10 K) from hs-CoII(3,5-DBSQ)2(DBPy)2 to ls-CoIII(3,5-DBSQ)(3,5-DBCat)(DBPy)2 oxidation state, whereas the other polymorph with lattice solvent (1S) results in a broad transition (T1/2 ∼ 150 K with ΔT ∼ 100 K). This increase in the VT transition temperature for (1) relative to (1S) illustrates the effect of lattice solvent on the VT transition mechanism. Additionally, the influence of halogen substitutions on the pyridine ring is discussed with respect to observed VT behaviour in the studied compounds.
Collapse
Affiliation(s)
- Venkatesha R Hathwar
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus University, Langelandsgade 140, Aarhus C 8000, Denmark
| | - Marian Stingaciu
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus University, Langelandsgade 140, Aarhus C 8000, Denmark
| | - Bo Richter
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus University, Langelandsgade 140, Aarhus C 8000, Denmark
| | - Jacob Overgaard
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus University, Langelandsgade 140, Aarhus C 8000, Denmark
| | - Bo B Iversen
- Center for Materials Crystallography, Department of Chemistry and iNano, Aarhus University, Langelandsgade 140, Aarhus C 8000, Denmark
| |
Collapse
|
34
|
Phonsri W, Macedo DS, Davies CG, Jameson GNL, Moubaraki B, Murray KS. Heteroleptic iron(iii) Schiff base spin crossover complexes: halogen substitution, solvent loss and crystallite size effects. Dalton Trans 2017; 46:7020-7029. [DOI: 10.1039/c7dt00947j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New heteroleptic iron(iii) spin crossover complexes, [Fe(qsal-X)(thsa)]·nMeCN, have been investigated. Halogen substitution, solvent and crystallite size effects are discussed.
Collapse
Affiliation(s)
- Wasinee Phonsri
- School of Chemistry
- 17 Rainforest Walk
- Monash University
- Clayton
- Australia
| | - David S. Macedo
- School of Chemistry
- 17 Rainforest Walk
- Monash University
- Clayton
- Australia
| | - Casey G. Davies
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | - Guy N. L. Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | | | - Keith S. Murray
- School of Chemistry
- 17 Rainforest Walk
- Monash University
- Clayton
- Australia
| |
Collapse
|
35
|
Phonsri W, Davies CG, Jameson GNL, Moubaraki B, Ward JS, Kruger PE, Chastanet G, Murray KS. Symmetry breaking above room temperature in an Fe(ii) spin crossover complex with an N4O2 donor set. Chem Commun (Camb) 2017; 53:1374-1377. [DOI: 10.1039/c6cc10040f] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
An halogen-substituted salicylaldimine iron(ii) complex shows an abrupt two-step spin transition above room temperature, variable temperature crystallography showing symmetry breaking.
Collapse
Affiliation(s)
| | - Casey G. Davies
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | - Guy N. L. Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | | | - Jas S. Ward
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Canterbury
- Christchurch 8041
- New Zealand
| | - Paul E. Kruger
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Canterbury
- Christchurch 8041
- New Zealand
| | | | | |
Collapse
|
36
|
Magnetic Bistability in Macrocycle‐Based Fe
II
Spin‐Crossover Complexes: Counter Ion and Solvent Effects. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600660] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
37
|
Insiti P, Jitthiang P, Harding P, Chainok K, Chotima R, Sirirak J, Blackwood S, Alkaş A, Telfer SG, Harding DJ. Substituent modulated packing in octahedral Ni(II) complexes. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
38
|
Herold CF, Shylin SI, Rentschler E. Solvent-dependent SCO Behavior of Dinuclear Iron(II) Complexes with a 1,3,4-Thiadiazole Bridging Ligand. Inorg Chem 2016; 55:6414-9. [PMID: 27295388 DOI: 10.1021/acs.inorgchem.6b00163] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Christian F. Herold
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Sergii I. Shylin
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Eva Rentschler
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg University, Mainz, Germany
| |
Collapse
|
39
|
|
40
|
Heteroleptic Iron(III) Spin Crossover Complexes; Ligand Substitution Effects. MAGNETOCHEMISTRY 2016. [DOI: 10.3390/magnetochemistry2010003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
41
|
Phonsri W, Martinez V, Davies CG, Jameson GNL, Moubaraki B, Murray KS. Ligand effects in a heteroleptic bis-tridentate iron(iii) spin crossover complex showing a very high T1/2 value. Chem Commun (Camb) 2016; 52:1443-6. [DOI: 10.1039/c5cc08701e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The iron(iii) bis-tridentate complex [Fe(3-OMe-SalEen)(thsa)] is the first heteroleptic iron(iii) spin crossover complex and displays a very high T1/2 value and weak thermal hysteresis. Intermolecular structural details are related to the cooperativity features.
Collapse
Affiliation(s)
- Wasinee Phonsri
- School of Chemistry
- Building 23
- Monash University
- Clayton
- 3800 Australia
| | - Victor Martinez
- School of Chemistry
- Building 23
- Monash University
- Clayton
- 3800 Australia
| | - Casey G. Davies
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | - Guy N. L. Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| | | | - Keith S. Murray
- School of Chemistry
- Building 23
- Monash University
- Clayton
- 3800 Australia
| |
Collapse
|
42
|
Shen FX, Huang W, Yamamoto T, Einaga Y, Wu D. Preparation of dihydroquinazoline carbohydrazone Fe( ii) complexes for spin crossover. NEW J CHEM 2016. [DOI: 10.1039/c5nj03095a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Mononuclear spin-crossover complexes of dihydroquinazoline derivatives were synthesized to enable the spin crossover phenomenon via the variation of the solvent, anion and substituent.
Collapse
Affiliation(s)
- Fu-Xing Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Jiangsu 213164
| | - Wei Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Jiangsu 213164
| | - Takashi Yamamoto
- Department of Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama
- Japan
| | - Yasuaki Einaga
- Department of Chemistry
- Faculty of Science and Technology
- Keio University
- Yokohama
- Japan
| | - Dayu Wu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Jiangsu 213164
| |
Collapse
|
43
|
Sertphon D, Harding DJ, Harding P, Murray KS, Moubaraki B, Adams H, Alkaş A, Telfer SG. Substituent-Influenced Spin Crossover in FeIIIQuinolylsalicylaldiminates. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201501188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
44
|
Phonsri W, Davies CG, Jameson GNL, Moubaraki B, Murray KS. Spin Crossover, Polymorphism and Porosity to Liquid Solvent in Heteroleptic Iron(III) {Quinolylsalicylaldimine/Thiosemicarbazone-Salicylaldimine} Complexes. Chemistry 2015; 22:1322-33. [PMID: 26662933 DOI: 10.1002/chem.201504266] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Indexed: 11/10/2022]
Abstract
Heteroleptic iron(III) complexes of formula [Fe(qsal)(thsa)]⋅solvent have been synthesized: [Fe(qsal)(thsa)]⋅0.4 BuOH (1), [Fe(qsal)(thsa)]⋅0.5 MeCN (2) and [Fe(qsal)(thsa)]⋅0.5 THF, (3). The latter two show partial solvent loss at room temperature to yield [Fe(qsal)(thsa)]⋅0.1 MeCN (2') and [Fe(qsal)(thsa)]⋅0.1 THF (3'), respectively. This family maintains a structural integrity which is analogous over different degrees of solvation, a rare occurrence in discrete molecular species. Uniquely, removal of MeCN from compound 2 leads to retention of crystallinity yielding the isostructural, fully desolvated compound [Fe(qsal)(thsa)] (2'') and a new high spin polymorph, 4. To the best of our knowledge, this is the first compound that forms polymorphs through a desolvation process. The desolvated mixture, 2'' and 4, is porous and can reabsorb MeCN and give rise to 2' again. This illustrates the reversible single-crystal-to-single-crystal transformation of two polymorphs back to a purely original phase, 2''+4↔2'. The structural, magnetic and Mőssbauer features of the various samples are described in terms of spin crossover.
Collapse
Affiliation(s)
- Wasinee Phonsri
- School of Chemistry, Monash University, Building 23, Clayton, Victoria, 3800, Australia
| | - Casey G Davies
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Guy N L Jameson
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Boujemaa Moubaraki
- School of Chemistry, Monash University, Building 23, Clayton, Victoria, 3800, Australia
| | - Keith S Murray
- School of Chemistry, Monash University, Building 23, Clayton, Victoria, 3800, Australia.
| |
Collapse
|
45
|
Kong J, Du J, Wang J, Chen Z. Supramolecular organic frameworks of a Schiff base showing selective guest adsorption. J Appl Crystallogr 2015. [DOI: 10.1107/s1600576715005889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
A relatively simple molecule,N,N′-bis(3-methoxy-4-hydroxybenzylidene)-1,4-phenylenediamine, was synthesized and found to be a suitable building block to form different types of crystalline frameworkviahydrogen bonding. The porous frameworks show potential selectivity for uptake of small guest molecules.
Collapse
|
46
|
Sirirak J, Harding DJ, Harding P, Murray KS, Moubaraki B, Liu L, Telfer SG. Spin Crossover incisManganese(III) Quinolylsalicylaldiminates. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500196] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
47
|
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
| |
Collapse
|
48
|
Vieira BJC, Dias JC, Santos IC, Pereira LCJ, da Gama V, Waerenborgh JC. Thermal Hysteresis in a Spin-Crossover FeIII Quinolylsalicylaldimine Complex, FeIII(5-Br-qsal)2Ni(dmit)2·solv: Solvent Effects. Inorg Chem 2015; 54:1354-62. [DOI: 10.1021/ic502278d] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bruno J. C. Vieira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - João C. Dias
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Isabel C. Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Laura C. J. Pereira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - Vasco da Gama
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| | - João C. Waerenborgh
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior
Técnico, Universidade de Lisboa, 2695-066 Bobadela
LRS, Portugal
| |
Collapse
|
49
|
Iasco O, Rivière E, Guillot R, Buron-Le Cointe M, Meunier JF, Bousseksou A, Boillot ML. FeII(pap-5NO2)2 and FeII(qsal-5NO2)2 Schiff-Base Spin-Crossover Complexes: A Rare Example with Photomagnetism and Room-Temperature Bistability. Inorg Chem 2015; 54:1791-9. [DOI: 10.1021/ic5027043] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Olga Iasco
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
| | - Eric Rivière
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
| | - Régis Guillot
- ICMMO-ECI, UMR CNRS 8182, Université Paris-Sud, 91405 Orsay cedex, France
| | | | | | | | | |
Collapse
|
50
|
Harding DJ, Phonsri W, Harding P, Murray KS, Moubaraki B, Jameson GNL. Abrupt two-step and symmetry breaking spin crossover in an iron(iii) complex: an exceptionally wide [LS–HS] plateau. Dalton Trans 2015; 44:15079-82. [DOI: 10.1039/c4dt03184a] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rare iron(iii) symmetry breaking spin crossover compound with an extremely wide [LS–HS] plateau is reported.
Collapse
Affiliation(s)
- David J. Harding
- Molecular Technology Research Unit
- School of Science
- Walailak University
- Thasala
- Thailand
| | - Wasinee Phonsri
- Molecular Technology Research Unit
- School of Science
- Walailak University
- Thasala
- Thailand
| | - Phimphaka Harding
- Molecular Technology Research Unit
- School of Science
- Walailak University
- Thasala
- Thailand
| | | | | | - Guy N. L. Jameson
- Department of Chemistry & MacDiarmid Institute for Advanced Materials and Nanotechnology
- University of Otago
- Dunedin
- New Zealand
| |
Collapse
|