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Zhang G, Zeng H, Zadori N, Marino C, Zheng S, Neary MC. Homoleptic octahedral Co II complexes as precatalysts for regioselective hydroboration of alkenes with high turnover frequencies. RSC Adv 2023; 13:28089-28096. [PMID: 37746341 PMCID: PMC10517108 DOI: 10.1039/d3ra06113b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 09/15/2023] [Indexed: 09/26/2023] Open
Abstract
Homoleptic complexes adopting octahedral coordination modes are usually less active in catalysis due to the saturated coordination around metal centers that prevents substrate activation in a catalytic event. In this work, we demonstrated that a homoleptic octahedral cobalt complex (1) of 4'-pyridyl-2,2';6',2''-terpyridine that experienced monoprotonation at the non-coordinating pyridyl moiety upon crystallization could serve as a highly efficient precatalyst for the hydroboration of styrene derivatives with Markovnikov selectivity. The solid-state structure of this precatalyst along with relevant homoleptic CoII and FeII complexes has been characterized by X-ray crystallography. In the solid state, 1 features one-dimensional hydrogen-bonded chains that are further stacked by interchain π⋯π interactions. The newly synthesized complexes (1-3) along with several known analogues (4-6) were examined as precatalysts for the hydroboration of alkenes. The best-performing system, 1/KOtBu was found to promote Markovnikov hydroboration of substituted styrenes with high turnover frequencies (TOFs) up to ∼47 000 h-1, comparable to the most efficient polymeric catalyst [Co(pytpy)Cl2]n reported to date. Although some limitations in substrate scope as well as functional group tolerance exist, the catalyst shows good promise for several relevant hydrofunctionaliation reactions.
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Affiliation(s)
- Guoqi Zhang
- Department of Sciences, John Jay College and PhD Program in Chemistry, The Graduate Center of the City University of New York New York 10019 NY USA
| | - Haisu Zeng
- Department of Sciences, John Jay College and PhD Program in Chemistry, The Graduate Center of the City University of New York New York 10019 NY USA
- Department of Chemistry, Hunter College, The City University of New York New York 10065 NY USA
| | - Nora Zadori
- Department of Sciences, John Jay College and PhD Program in Chemistry, The Graduate Center of the City University of New York New York 10019 NY USA
| | - Camila Marino
- Department of Sciences, John Jay College and PhD Program in Chemistry, The Graduate Center of the City University of New York New York 10019 NY USA
| | - Shengping Zheng
- Department of Chemistry, Hunter College, The City University of New York New York 10065 NY USA
| | - Michelle C Neary
- Department of Chemistry, Hunter College, The City University of New York New York 10065 NY USA
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2
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Sun YC, Chen FL, Wang KJ, Zhao Y, Wei HY, Wang XY. Hysteretic Spin Crossover with High Transition Temperatures in Two Cobalt(II) Complexes. Inorg Chem 2023; 62:14863-14872. [PMID: 37676750 DOI: 10.1021/acs.inorgchem.3c01188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Cooperative spin crossover transitions with thermal hysteresis loops are rarely observed in cobalt(II) complexes. Herein, two new mononuclear cobalt(II) complexes with hysteretic spin crossover at relatively high temperatures (from 320 to 400 K), namely, [Co(terpy-CH2OH)2]·X2 (terpy-CH2OH = 4'-(hydroxymethyl)-2,2';6',2″-terpyridine, X = SCN-(1) and SeCN- (2)), have been synthesized and characterized structurally and magnetically. Both compounds are mononuclear CoII complexes with two chelating terpy-CH2OH ligands. Magnetic measurements revealed the existence of the hysteretic SCO transitions for both complexes. For compound 1, a one-step transition with T1/2↑= 334.5 K was observed upon heating, while a two-step transition is observed upon cooling with T1/2↓(1) = 329.3 K and T1/2↓(2) = 324.1 K (at a temperature sweep rate of 5 K/min). As for compound 2, a hysteresis loop with a width of 5 K (T1/2↓ = 391.6 K and T1/2↑ = 396.6 K, at a sweep rate of 5 K/min) can be observed. Thanks to the absence of the crystallized lattice solvents, their single crystals are stable enough at high temperatures for the structure determination at both spin states, which reveals that the hysteretic SCO transitions in both complexes originate from the crystallographic phase transitions involving a thermally induced order-disorder transition of the dangling -CH2OH groups in the ligand. This work shows that the modification of the terpy ligand has an important effect on the magnetic properties of the resulting cobalt(II) complexes.
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Affiliation(s)
- 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
| | - 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
| | - Kang-Jie Wang
- 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
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal 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
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3
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Monitoring the Substrate‐Induced Spin‐State Distribution in a Cobalt(II)‐Salen Complex by EPR and DFT. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202101071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Zhang SY, Sun HY, Wang RG, Meng YS, Liu T, Zhu YY. Construction of spin-crossover dinuclear cobalt(II) compounds based on complementary terpyridine ligand pairing. Dalton Trans 2022; 51:9888-9893. [DOI: 10.1039/d2dt00436d] [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
The self-assembly of multinuclear SCO complexes is appealing in which unique properties may be discovered due to the enhanced intramolecular and intermolecular interactions. In this work,.three dinuclear cobalt(II) complexes, named...
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5
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KANETOMO T, Ni Z, Enomoto M. Hydrogen-Bonded Cobalt(II)-Organic Framework: Normal and Reverse Spin-Crossover Behaviours. Dalton Trans 2022; 51:5034-5040. [DOI: 10.1039/d2dt00453d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel hydrogen-bonded metal-organic framework (H-MOF) [Co(HL)2](DMF)1.2(H2O)2.4 (1·solv), in which L = 2,2’:6’,2”-terpyridine-5,5’-diyl biscarboxylate, was prepared. An intermolecular single H-bond between carboxy and carboxylate sites was present in this compound....
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6
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Kanetomo T, Inokuma K, Naoi Y, Enomoto M. Spin transition triggered by desorption of crystal solvents for a two-dimensional cobalt(ii) complex with hydrogen bonding. Dalton Trans 2021; 50:11243-11248. [PMID: 34341808 DOI: 10.1039/d1dt01934a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
[Co(5tpybNOH)2](BPh4)2 (1; 5tpybNOH = 5,5''-bis(N-tert-butyl hydroxylamino)-2,2':6',2''-terpyridine) has a two-dimensional (2D) structure through a hydrogen bond between the NOH sites, as revealed by X-ray crystallography. The crystal solvents were desorbed above 300 K as shown by thermal analyses and powder X-ray crystallography. The removal of the crystal solvents allowed irreversible structural changes and a spin transition of the Co centre from S = 1/2 to 3/2.
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Affiliation(s)
- Takuya Kanetomo
- Department of Chemistry, Faculty of Science Division 1, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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7
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Palacios-Corella M, García-López V, Sánchez-Sánchez C, Clemente-Juan JM, Clemente-León M, Coronado E. Insertion of single-ion magnets based on mononuclear Co(II) complexes into ferromagnetic oxalate-based networks. Dalton Trans 2021; 50:5931-5942. [PMID: 33949535 DOI: 10.1039/d1dt00595b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The 1 : 2 and 1 : 1 Co(ii) complexes of the L ligand (L = 6-(3,5-diamino-2,4,6-triazinyl)2,2'-bipyridine) with formulas [CoII(L)2](ClO4)2·0.5MeCN·Et2O (1) and [CoII(L)(CH3CN)2(H2O)](ClO4)2·MeCN (2) have been prepared. The structural and magnetic characterization of the two compounds shows that they contain octahedral high-spin Co(ii) and present a field-induced slow relaxation of the magnetization. 1 has been inserted into a bimetallic oxalate-based network leading to a novel achiral 3D compound of formula [CoII(L)2][MnIICrIII(ox)3]2·(solvate) (3) exhibiting ferromagnetic ordering below 4.6 K. EPR measurements suggest a weak magnetic coupling between the two sublattices.
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Affiliation(s)
- M Palacios-Corella
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - V García-López
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - C Sánchez-Sánchez
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - J M Clemente-Juan
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - M Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - E Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain.
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8
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Akiyoshi R, Ohtani R, Lindoy LF, Hayami S. Spin crossover phenomena in long chain alkylated complexes. Dalton Trans 2021; 50:5065-5079. [DOI: 10.1039/d1dt00004g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review presents a discussion of soft metal complexes with a focus on spin crossover behaviours that are associated with structural phase transition, including liquid crystal LC transition.
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Affiliation(s)
- Ryohei Akiyoshi
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto
- Japan
| | - Ryo Ohtani
- Department of Chemistry
- Faculty of Science
- Kyushu University
- Fukuoka 819-0395
- Japan
| | | | - Shinya Hayami
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto
- Japan
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9
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Pan Y, Meng YS, Liu Q, Gao WQ, Liu CH, Liu T, Zhu YY. Construction of SCO-Active Fe(II) Mononuclear Complexes from the Thio-pybox Ligand. Inorg Chem 2020; 59:7398-7407. [PMID: 32401025 DOI: 10.1021/acs.inorgchem.9b03506] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of new spin-crossover complexes provides novel promising switching materials with significant potential at the molecular level. Ter-imine-type molecules represent one of the important classes of ligands in creating SCO-active complexes. Herein we report a family of mononuclear Fe(II) SCO-active compounds constructed from a new type of ter-imine ligand named the thio-pybox ligand (2,6-bis(4,4-dimethyl-4,5-dihydrothiazol-2-yl)pyridine, L1). Through the variation of counteranions, some cases display complete SCO and with T1/2 near ambient temperature. Among them, annealed [FeII(L1)2](ClO4)2 [1(ClO4)] shows T1/2↓ and T1/2↑ as 319 and 349 K, respectively. The wide thermal hysteresis of ΔT = 30 K originated from the weak interaction between complex cations and counteranions in the crystal lattice. Impressively, its high-spin population can be increased considerably by annealing at high temperature. The metastable high-spin phase is stable in the successive magnetic measurements and would gradually relax to its initial state with high population of low-spin configuration at ambient temperature. In acetonitrile-diluted solution, 1(ClO4) still maintains SCO with an estimated T1/2 at 240 K. Differential scanning calorimetry discloses the structural phase at around 355 K in the first heating process and the increase in the high-spin population concomitant with annealing was also corroborated by 57Fe Mössbauer measurements. Additionally, the influences on SCO by counteranion and ligand structure are investigated, which show that the fine tuning of complex structures can affect the behavior of the spin state significantly. Finally, magneto-structural correlation studies were performed on the structures of 1(ClO4) and its oxygen analogue at multiple temperatures. The analyses of some structural parameters, including terminal N···N donor separation, bite angle, patulous angle, and the root mean squared deviation indicate that the replacement of the oxygen atom with a sulfur atom can effectively improve the flexibility and release the steric strain and thus tune the SCO toward ambient temperature. Our research demonstrates the rational design of the ligand can lead to new SCO-active compounds with high performance.
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Affiliation(s)
- Yao Pan
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, China
| | - Yin-Shan Meng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Qiang Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Wan-Qing Gao
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, China
| | - Chun-Hua Liu
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, China
| | - Tao Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering, Hefei University of Technology and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, China.,State Key Laboratory of Fine Chemicals, Dalian University of Technology, 2 Linggong Road, Dalian 116024, China
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10
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Wang Y, Tang G, Wu Y. A Set of phenyl sulfonate metal coordination complexes triggered Biginelli reaction for the high efficient synthesis of 3,4‐dihydropyrimidin‐2(1
H
)‐ones under solvent‐free conditions. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yong‐Tao Wang
- School of Chemistry and Pharmaceutical EngineeringQilu University of Technology (Shandong Academy of Sciences) Jinan 250353 China
| | - Gui‐Mei Tang
- School of Chemistry and Pharmaceutical EngineeringQilu University of Technology (Shandong Academy of Sciences) Jinan 250353 China
| | - Yu‐Song Wu
- School of Chemistry and Pharmaceutical EngineeringQilu University of Technology (Shandong Academy of Sciences) Jinan 250353 China
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11
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Yao ZS, Tang Z, Tao J. Bistable molecular materials with dynamic structures. Chem Commun (Camb) 2020; 56:2071-2086. [DOI: 10.1039/c9cc09238b] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this Feature Article, we introduce how to manipulate the motion of electrons or molecules by external stimuli, to achieve switchable properties in molecule-based single crystals.
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Affiliation(s)
- 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
| | - Zheng Tang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Liangxiang Campus
- Beijing Institute of Technology
- Beijing 102488
| | - 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
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12
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Świtlicka A, Machura B, Penkala M, Bieńko A, Bieńko DC, Titiš J, Rajnák C, Boča R, Ozarowski A. Slow magnetic relaxation in hexacoordinated cobalt(ii) field-induced single-ion magnets. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00257g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To gain an insight into the factors affecting the enhancement of the energy barrier in SMM/SIM, hexacoordinate pseudohalide Co(ii) complexes based on the tridentate ligand were investigated.
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Affiliation(s)
- Anna Świtlicka
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Barbara Machura
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Mateusz Penkala
- Department of Inorganic
- Organometallic Chemistry and Catalysis
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
| | - Alina Bieńko
- Faculty of Chemistry
- University of Wroclaw
- 50-383 Wroclaw
- Poland
| | - Dariusz C. Bieńko
- Faculty of Chemistry
- Wroclaw University of Technology
- 50-370 Wroclaw
- Poland
| | - Ján Titiš
- Department of Chemistry
- Faculty of Natural Sciences
- University of SS Cyril and Methodius
- 917 01 Trnava
- Slovakia
| | - Cyril Rajnák
- Department of Chemistry
- Faculty of Natural Sciences
- University of SS Cyril and Methodius
- 917 01 Trnava
- Slovakia
| | - Roman Boča
- Department of Chemistry
- Faculty of Natural Sciences
- University of SS Cyril and Methodius
- 917 01 Trnava
- Slovakia
| | - Andrew Ozarowski
- National High Magnetic Field Laboratory
- Florida State University
- Tallahassee
- USA
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13
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Jain S, Bhar K, Kumar S, Bandyopadhyaya S, Tapryal S, Mandal CC, Sharma AK. Homo- and heteroleptic trimethoxy terpyridine–Cu(ii) complexes: synthesis, characterization, DNA/BSA binding, DNA cleavage and cytotoxicity studies. Dalton Trans 2020; 49:4100-4113. [DOI: 10.1039/d0dt00209g] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the current study, four novel mononuclear Cu(ii) complexes with terpyridine (L) and different co-ligands (phen, bipy, and imd) were synthesized and characterized in detail, whereLis 4′-(3,4,5-trimethoxyphenyl)-2,2′:6′,2′′-terpyridine.
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Affiliation(s)
- Surbhi Jain
- Department of Chemistry
- School of Chemical Sciences and Pharmacy
- India
| | - Kishalay Bhar
- Department of Chemistry
- School of Chemical Sciences and Pharmacy
- India
| | - Sandeep Kumar
- Department of Biotechnology
- School of Life Sciences
- India
| | | | - Suman Tapryal
- Department of Biotechnology
- School of Life Sciences
- India
| | - Chandi C. Mandal
- Department of Biochemistry
- School of Life Sciences
- Central University of Rajasthan
- India
| | - Anuj K. Sharma
- Department of Chemistry
- School of Chemical Sciences and Pharmacy
- India
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14
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Shao D, Shi L, Shen FX, Wei XQ, Sato O, Wang XY. Reversible On–Off Switching of the Hysteretic Spin Crossover in a Cobalt(II) Complex via Crystal to Crystal Transformation. Inorg Chem 2019; 58:11589-11598. [DOI: 10.1021/acs.inorgchem.9b01436] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Le Shi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Xiao-Qin Wei
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 816-8580 Fukuoka, Japan
| | - 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, People’s Republic of China
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15
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Kobayashi F, Ohtani R, Nakamura M, Lindoy LF, Hayami S. Slow Magnetic Relaxation Triggered by a Structural Phase Transition in Long-Chain-Alkylated Cobalt(II) Single-Ion Magnets. Inorg Chem 2019; 58:7409-7415. [PMID: 31117627 DOI: 10.1021/acs.inorgchem.9b00543] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The behavior of single-ion magnets (SIMs) that reflects large distortions of their coordination environments caused by the packing of long alkyl chains for two Co(II) complexes of the type [Co(C n-terpy)2](BF4)2 (C n-terpy = 4'-alkoxy-2,2':6',2″-terpyridine; n = 10 (1), 16 (2)) is reported. 1·2MeOH, which features a highly distorted octahedral high-spin Co(II) center, exhibits field-induced slow magnetic relaxation under an applied dc field of 1000 Oe. Further detailed analysis of the relaxation process indicated the prevalence of the Raman process at low temperature. Surprisingly, 2 shows a reverse spin transition (rST) and also exhibits remarkable field-induced SIM behavior, revealing the presence of magnetic anisotropy for this high-spin Co(II) species that is triggered by a structural phase transition. We present here the first examples of the coexistence of field-induced slow magnetic relaxation and rST associated with structural phase transitions involving long-alkyl-chain conformational changes from gauche to anti. These results indicate the prospect of inducing SIM properties in other distorted high-spin Co(II) species bearing long alkyl chains.
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Affiliation(s)
- Fumiya Kobayashi
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Ryo Ohtani
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Masaaki Nakamura
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
| | - Leonard F Lindoy
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Shinya Hayami
- Department of Chemistry, Graduate School of Science and Technology , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan.,Institute of Pulsed Power Science (IPPS) , Kumamoto University , 2-39-1 Kurokami , Chuo-ku, Kumamoto 860-8555 , Japan
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16
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Shao D, Shi L, Yin L, Wang BL, Wang ZX, Zhang YQ, Wang XY. Reversible on-off switching of both spin crossover and single-molecule magnet behaviours via a crystal-to-crystal transformation. Chem Sci 2018; 9:7986-7991. [PMID: 30450182 PMCID: PMC6202758 DOI: 10.1039/c8sc02774a] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 08/27/2018] [Indexed: 11/21/2022] Open
Abstract
The on-off switching of spin-crossover (SCO) and single-molecule magnetism (SMM) remains highly attractive, especially if it involves dynamic crystal-to-crystal transformation. Herein we report the first molecule, a mononuclear cobalt(ii) complex, that exhibits on-off switching between SCO and SMM reversibly during crystal-to-crystal transformation. Subtle structural transformation triggered by a simple dehydration-rehydration process induces significant geometrical changes of the CoII center and modification of the supramolecular interactions and switches its colour and magnetic properties (dark red/SCO-on/SMM-off ↔ orange/SCO-off/SMM-on). This work suggests that modification of the weak supramolecular interactions could be very effective in achieving switchable materials involving both SCO and SMM properties.
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Affiliation(s)
- Dong Shao
- State Key Laboratory of Coordination Chemistry , Collaborative Innovation Center of Advanced Microstructures , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , 210023 , China .
| | - Le Shi
- State Key Laboratory of Coordination Chemistry , Collaborative Innovation Center of Advanced Microstructures , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , 210023 , China .
| | - Lei Yin
- Wuhan National High Magnetic Field Centre , Huazhong University of Science and Technology , Wuhan , 430074 , China
| | - Bao-Lin Wang
- Jiangsu Key Laboratory for NSLSCS , School of Physical Science and Technology , Nanjing Normal University , Nanjing , 210023 , China
| | - Zhen-Xing Wang
- Wuhan National High Magnetic Field Centre , Huazhong University of Science and Technology , Wuhan , 430074 , China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS , School of Physical Science and Technology , Nanjing Normal 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 .
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17
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Czerwińska K, Machura B, Kula S, Krompiec S, Erfurt K, Roma-Rodrigues C, Fernandes AR, Shul'pina LS, Ikonnikov NS, Shul'pin GB. Copper(ii) complexes of functionalized 2,2':6',2''-terpyridines and 2,6-di(thiazol-2-yl)pyridine: structure, spectroscopy, cytotoxicity and catalytic activity. Dalton Trans 2018; 46:9591-9604. [PMID: 28702618 DOI: 10.1039/c7dt01244f] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Six new copper(ii) complexes with 2,2':6',2''-terpyridine (4'-Rn-terpy) [1 (R1 = furan-2-yl), 2 (R2 = thiophen-2-yl), and 3 (R3 = 1-methyl-1H-pyrrol-2-yl)] and 2,6-di(thiazol-2-yl)pyridine derivatives (Rn-dtpy) [4 (R1), 5 (R2), and 6 (R3)] have been synthesized by a reaction between copper(ii) chloride and the corresponding ligand. The complexes have been characterized by UV-vis and IR spectroscopy, and their structures have been determined by X-ray analysis. The antiproliferative potential of copper(ii) complexes of 2,2':6',2''-terpyridine and 2,6-di(thiazol-2-yl)pyridine derivatives towards human colorectal (HCT116) and ovarian (A2780) carcinoma as well as towards lung (A549) and breast adenocarcinoma (MCF7) cell lines was examined. Complex 1 and complex 6 were found to have the highest antiproliferative effect on A2780 ovarian carcinoma cells, particularly when compared with complex 2, 3 with no antiproliferative effect. The order of cytotoxicity in this cell line is 6 > 1 > 5 > 4 > 2 ≈ 3. Complex 2 seems to be much more specific towards colorectal carcinoma HCT116 and lung adenocarcinoma A549 cells. The viability loss induced by the complexes agrees with Hoechst 33258 staining and typical morphological apoptotic characteristics like chromatin condensation and nuclear fragmentation. The specificity towards different types of cell lines and the low cytotoxic activity towards healthy cells are of particular interest and are a positive feature for further developments. Complexes 1-6 were also tested in the oxidation of alkanes and alcohols with hydrogen peroxide and tert-butyl-hydroperoxide (TBHP). The most active catalyst 4 gave, after 120 min, 0.105 M of cyclohexanol + cyclohexanone after reduction with PPh3. This concentration corresponds to a yield of 23% and TON = 210. Oxidation of cis-1,2-dimethylcyclohexane with m-CPBA catalyzed by 4 in the presence of HNO3 gave a product of a stereoselective reaction (trans/cis = 0.47). Oxidation of secondary alcohols afforded the target ketones in yields up to 98% and TON = 630.
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Affiliation(s)
- Katarzyna Czerwińska
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna St, 40-006 Katowice, Poland.
| | - Barbara Machura
- Department of Crystallography, Institute of Chemistry, University of Silesia, 9th Szkolna St, 40-006 Katowice, Poland.
| | - Slawomir Kula
- Department of Inorganic, Organometallic Chemistry and Catalysis, Institute of Chemistry, University of Silesia, 9th Szkolna St, 40-006 Katowice, Poland
| | - Stanisław Krompiec
- Department of Inorganic, Organometallic Chemistry and Catalysis, Institute of Chemistry, University of Silesia, 9th Szkolna St, 40-006 Katowice, Poland
| | - Karol Erfurt
- Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland
| | - Catarina Roma-Rodrigues
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal.
| | - Alexandra R Fernandes
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal.
| | - Lidia S Shul'pina
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ulitsa Vavilova, dom 28, Moscow 119991, Russia
| | - Nikolay S Ikonnikov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ulitsa Vavilova, dom 28, Moscow 119991, Russia
| | - Georgiy B Shul'pin
- Department of Kinetics and Catalysis, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ulitsa Kosygina, dom 4, Moscow 119991, Russia. and Chair of Chemistry and Physics, Plekhanov Russian University of Economics, Stremyannyi pereulok, dom 36, Moscow 117997, Russia
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18
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Bhat GA, Rajendran A, Murugavel R. Polydentate 4-Pyridyl-terpyridine Containing Discrete Cobalt Phosphonate and Polymeric Cobalt Phosphate as Catalysts for Alcohol Oxidation. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gulzar A. Bhat
- Department of Chemistry; Indian Institute of Technology Bombay; 400 076 Mumbai - India
| | - Antony Rajendran
- Department of Chemistry; Indian Institute of Technology Bombay; 400 076 Mumbai - India
| | - Ramaswamy Murugavel
- Department of Chemistry; Indian Institute of Technology Bombay; 400 076 Mumbai - India
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19
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A molecular-based phase trasition compound based on ligand 1-ethyl-1,4-diazonia-bicyclo [2.2.2] octane. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.04.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Zhang Y, Harriman KLM, Brunet G, Pialat A, Gabidullin B, Murugesu M. Reversible Redox, Spin Crossover, and Superexchange Coupling in 3
d
Transition‐Metal Complexes of
Bis
‐azinyl Analogues of 2,2′:6′,2′′‐Terpyridine. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800065] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yixin Zhang
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Katie L. M. Harriman
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Gabriel Brunet
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Amélie Pialat
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Bulat Gabidullin
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
| | - Muralee Murugesu
- Department of Chemistry University of Ottawa 10 Marie Curie K1N 6N5 Ottawa Ontario Canada
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21
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Nakaya M, Ohtani R, Shin JW, Nakamura M, Lindoy LF, Hayami S. Abrupt spin transition in a modified-terpyridine cobalt(ii) complex with a highly-distorted [CoN6] core. Dalton Trans 2018; 47:13809-13814. [DOI: 10.1039/c8dt02367k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The cobalt(ii) complex [Co(Naph-C2-terpy)2](BF2)2 (1) incorporating a highly distorted [CoN6] core was found to exhibit abrupt spin transition behavior, unlike solvated 1·2MeOH, which showed gradual spin crossover behavior.
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Affiliation(s)
- Manabu Nakaya
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Ryo Ohtani
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | - Jong Won Shin
- Daegu-Gyeongbuk Branch
- Korea Institute of Science and Technology Information
- Daegu 41515
- South Korea
| | - Masaaki Nakamura
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
| | | | - Shinya Hayami
- Department of Chemistry
- Graduate School of Science and Technology
- Kumamoto University
- Kumamoto 860-8555
- Japan
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22
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Huang W, Li Y, Yong J, Liu Y, Wu D. Hydrazone-based cobalt complexes toward multielectron redox and spin crossover. RSC Adv 2018; 8:17159-17167. [PMID: 35539225 PMCID: PMC9081832 DOI: 10.1039/c8ra02963f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/19/2018] [Indexed: 01/14/2023] Open
Abstract
Hydrazone-based derivatives modified by substitution at different positions were utilized to prepare a series of bis-homoleptic cobalt complexes. One species, [CoIII(L1)2]+ (1), which incorporated deprotonated ligands, adopted a Co(iii) diamagnetic ground state. However, the substituent of a hydrogen atom with a methyl group precluded the possibility of deprotonation upon metal coordination, which led to two species, [CoII(L2Me)2]2+ (2) and [CoII(L3NO2)2]2+, (3) which underwent a gradual spin crossover with an adjustable substituent effect and a mixed character of low-spin (doublet) and high-spin (quartet) populations in wide temperature ranges. Depending on the electronic effects of the substituents on the ligand, the multielectron redox behavior of the cobalt center was systematically modulated as well. This result demonstrates redox-switchable spin crossover in a new hydrazone-based Co(ii) system, in which the deprotonation of the coordination pocket and substituent groups in aromatic ligands can have a profound effect on the redox potential and spin state of the metal center. Hydrazone-based derivatives modified by substitution at different positions were utilized to prepare a series of bis-homoleptic cobalt complexes toward multielectron redox and spin crossover.![]()
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Affiliation(s)
- 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
- Changzhou
| | - Yujie Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
| | - Juan Yong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
| | - Yang Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing
- School of Petrochemical Engineering
- Changzhou University
- Changzhou
| | - 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
- Changzhou
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23
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Tang JH, Sun TG, Shao JY, Gong ZL, Zhong YW. Resistive memory devices based on a triphenylamine-decorated non-precious cobalt(ii) bis-terpyridine complex. Chem Commun (Camb) 2017; 53:11925-11928. [PMID: 29044252 DOI: 10.1039/c7cc05806c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The ITO/active material/Au sandwiched devices of a cobalt(ii) bis-terpyridine complex decorated with two triphenylamine motifs display appealing flash-type resistive switching with a large ON/OFF ratio (>103) and low operating voltages (<±3 V). In contrast, devices with the triphenylamine-appended terpyridine ligand show WORM-type memory behaviour.
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Affiliation(s)
- Jian-Hong Tang
- CAS Key Laboratory of Photochemistry, CAS Research/Education Centre for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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24
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Zhang JY, Su LJ, Guo QJ, Tao J. Semiconducting spin-crossover cobalt (II) compound with non-integer charge distribution among TCNQ radicals. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.05.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Chen L, Ji Q, Wang X, Pan Q, Cao X, Xu G. Two novel metal–organic coordination polymers based on ligand 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide with phase transition, and ferroelectric and dielectric properties. CrystEngComm 2017. [DOI: 10.1039/c7ce00964j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of two low-temperature structural phase transition compounds {[Ag3(dabcodo)(NO3)3]·H2O}n (1) and [Ca(Dabcodo)(H2O)4Cl2]n (2) are described. Compound 1 displayed ferroelectric–ferroelectric phase transition.
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Affiliation(s)
- Lizhuang Chen
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Qin Ji
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Xingang Wang
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Qijian Pan
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Xingxing Cao
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- P. R. China
| | - Guancheng Xu
- Key Laboratory of Energy Materials Chemistry
- Ministry of Education
- Key Laboratory of Advanced Functional Materials
- Autonomous Region
- Institute of Applied Chemistry
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26
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Wang JH, Zhang E, Tang GM, Wang YT, Cui YZ, Ng SW. Novel bipyridinyl oxadiazole-based metal coordination complexes: High efficient and green synthesis of 3,4-dihydropyrimidin-2(1H)-ones through the Biginelli reactions. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.05.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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27
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Wang JH, Tang GM, Yan SC, Wang YT, Zhan SJ, Zhang E, Sun Y, Jiang Y, Cui YZ. Cobalt-based metal coordination polymers with 4,4′-bipyridinyl groups: highly efficient catalysis for one-pot synthesis of 3,4-dihydropyrimidin-2(1H)-ones under solvent-free conditions. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3535] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jin-Hua Wang
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Gui-Mei Tang
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Shi-Chen Yan
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Yong-Tao Wang
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Shi-Jie Zhan
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - E Zhang
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Yu Sun
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Yuan Jiang
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
| | - Yue-Zhi Cui
- Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals; Qilu University of Technology; Jinan 250353 China
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28
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Zhang C, Liu ZY, Liu N, Zhao H, Yang EC, Zhao XJ. Different magnetic responses observed in Co, Co and Co-based MOFs. Dalton Trans 2016; 45:11864-75. [PMID: 27377468 DOI: 10.1039/c6dt01587e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Four magnetic MOFs with anisotropic Co(II) ions, {[Co5(H2O)2(μ3-OH)2(atz)2(stp)2]·1.5H2O}n (1), {[Co5(H2O)2(μ3-OH)2(trz)2(stp)2]·1.3H2O}n (2), {[Co5(H2O)6(μ3-OH)2(trz)2(stp)2]·2.5CH3OH}n (3) and {[Co3(H2O)4(Hdatrz)2(stp)2]·3H2O}n (4) (stp(3-) = 2-sulfoterephthalate, trz(-) = 1,2,4-triazolate, atz(-) = 3-amino-1,2,4-triazolate and Hdatrz = 3,5-diamino-1,2,4-triazole) were solvothermally isolated by varying the substituent groups appended on the N-heterocyclic triazole and structurally and magnetically characterized. Structural analyses indicate that the former two complexes are crystallographically isostructural, exhibiting pillared-layer frameworks with mixed triazolyl and carboxylate extended Co + Co layers supported by rigid stp(3-) connectors. Complex 3 is built from butterfly-shaped Co cluster-based layers, which are interconnected with single cobalt(ii) octahedra by ditopic stp(3-) bridges. By contrast, complex 4 consists of linear {Co3(μ-N1,N4-Hdatrz)2} subunits, which are extended by 3-connected stp(3-) linkers into a stable 3D framework. Magnetically, 1 exhibits ferromagnetic ordering below 2.7 K due to the well-organized alignment of the non-compensated resultant moment from octahedra and tetrahedral cobalt(ii) carriers, while 3 is in a non-zero paramagnetic state above 2.0 K resulting from the coexistence of intermetallic ferromagnetic and antiferromagnetic interactions. The magnetic competition between weak inter-subunit antiferromagnetic interactions and the external magnetic field makes 4 behave as a field-induced metamagnet with a critical field of 27.5 kOe. These interesting magnetostructural results suggest that the anisotropy of the moment carrier and the interlayer/intersubunit separations significantly dominate the magnetic responses in extended MOFs, providing an informative platform for the further development of interesting magnetic materials, both of academic and industrial interest.
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Affiliation(s)
- Chao Zhang
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Zhong-Yi Liu
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Ning Liu
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Hong Zhao
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - En-Cui Yang
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China.
| | - Xiao-Jun Zhao
- College of Chemistry, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, P. R. China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, P. R. China
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29
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Vicente AI, Joseph A, Ferreira LP, de Deus Carvalho M, Rodrigues VHN, Duttine M, Diogo HP, Minas da Piedade ME, Calhorda MJ, Martinho PN. Dynamic spin interchange in a tridentate Fe(iii) Schiff-base compound. Chem Sci 2016; 7:4251-4258. [PMID: 30155072 PMCID: PMC6013817 DOI: 10.1039/c5sc04577k] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 03/16/2016] [Indexed: 11/21/2022] Open
Abstract
The thermosalient effect is still a rare and poorly understood phenomenon, where crystals suddenly jump, bend, twist or explode upon undergoing a thermally activated phase transition. The synthesis and characterisation of the new spin transition Fe(iii) compound [Fe(5-Br-salEen)2][ClO4] (salEen = N-ethyl-N-(2-aminoethyl)salicylaldiminate) is described and its thermosalient behaviour reported. It is the first example of a thermosalient effect with a spin transition and magnetic, calorimetric, diffraction, microscopy and computational studies are used to characterise these effects. Both thermosalient effect and spin transition occur around 320 K upon heating and are accompanied by an anisotropic unit cell change with conservation of crystal symmetry that causes a large enough stress of the crystal lattice to induce crystal explosion. This stress can ultimately be traced back to a diffusionless and distortive structural perturbation resulting in a coupled spin transition-thermosalient effect.
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Affiliation(s)
- Ana I Vicente
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
| | - Abhinav Joseph
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
| | - Liliana P Ferreira
- BioISI , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal
- Department of Physics , University of Coimbra , 3004-516 Coimbra , Portugal
| | - Maria de Deus Carvalho
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
| | | | - Mathieu Duttine
- CNRS , Université de Bordeaux , ICMCB , 87 avenue du Dr. A. Schweitzer , Pessac F-33608 , France
| | - Hermínio P Diogo
- Centro de Química Estrutural , Instituto Superior Técnico , Universidade de Lisboa , 1049-001 Lisboa , Portugal
| | - Manuel E Minas da Piedade
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
| | - Maria José Calhorda
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
| | - Paulo N Martinho
- Centro de Química e Bioquímica , Faculdade de Ciências , Universidade de Lisboa , Campo Grande , 1749-016 Lisboa , Portugal .
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30
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Wang W, Ji B, Zhang C, Cao X. New spin crossover polymeric composite and another way to describe the result. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.03.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Shaffer DW, Bhowmick I, Rheingold AL, Tsay C, Livesay BN, Shores MP, Yang JY. Spin-state diversity in a series of Co(ii) PNP pincer bromide complexes. Dalton Trans 2016; 45:17910-17917. [DOI: 10.1039/c6dt03461f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the structural and electronic impacts of modifying the bridging atom in a family of Co(ii) pincer complexes with the formula Co(t-Bu)2PEPyEP(t-Bu)2Br2 (Py = pyridine, E = CH2, NH, and O for compounds 1–3, respectively).
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Affiliation(s)
| | | | | | - Charlene Tsay
- Department of Chemistry
- University of California
- Irvine
- USA
| | - Brooke N. Livesay
- Department of Chemistry
- Colorado State University
- Fort Collins
- USA
- Department of Chemistry
| | | | - Jenny Y. Yang
- Department of Chemistry
- University of California
- Irvine
- USA
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32
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Shen F, Huang W, Wu D, Zheng Z, Huang XC, Sato O. Redox Modulation of Spin Crossover within a Cobalt Metallogrid. Inorg Chem 2015; 55:902-8. [DOI: 10.1021/acs.inorgchem.5b02442] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Fuxing Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - 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, Changzhou, Jiangsu 213164, China
| | - 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, Changzhou, Jiangsu 213164, China
| | - Zhe Zheng
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xing-Cai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Collaborative Innovation Center of Advanced Catalysis & Green Manufacturing, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Osamu Sato
- Institute
for Materials Chemistry and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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