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Mörtel M, Goodner SJ, Oschwald J, Scheurer A, Drewello T, Khusniyarov MM. Low-spin to low-spin valence tautomeric transition in cobalt bis-dioxolenes. Dalton Trans 2024; 53:4098-4107. [PMID: 38314834 DOI: 10.1039/d3dt03935h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Cobalt dioxolenes are a well-known class of switchable coordination compounds showing intramolecular electron transfer, which is always accompanied by a spin state change at the cobalt center. Here, we present the first example of thermally switchable cobalt bis-dioxolenes where intramolecular electron transfer seems to take place, but the spin state change is suppressed. This leads to the detection of thermal transition between a common ls-CoIII(SQ˙-)(Cat2-) and an extremely rare ls-CoII(SQ˙-)2 electronic state (hs - high-spin, ls - low-spin, SQ˙- - benzosemiquinonate(1-) radical and Cat2- - catecholate(2-)). Parallel to the present work, a similar work but on cobalt mono-dioxolenes has just appeared (Chem. Eur. J., 2023, 29, e202300091), suggesting thermal transition between ls-CoIII(Cat2-) and ls-CoII(SQ˙-) electronic states.
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Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058, Germany.
| | - Stephen J Goodner
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058, Germany.
| | - Johannes Oschwald
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058, Germany
| | - Andreas Scheurer
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058, Germany.
| | - Thomas Drewello
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058, Germany
| | - Marat M Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058, Germany.
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2
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Luo X, Ling R, Xing R, Liu Y, Wan J, Li M, Wang C. Improved NH 3 Uptake of a Macromolecule-Metal Complex Constructed with Dual Polymeric Ligands and M(II). ACS APPLIED MATERIALS & INTERFACES 2024; 16:6495-6503. [PMID: 38286763 DOI: 10.1021/acsami.3c16465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
MOFs are considered as efficient NH3 adsorbents for their high capacity but are accompanied by the collapse of MOFs. In this work, macromolecule-metal complexes (MMCs), which could provide metal sites like MOFs, were developed for reversible NH3 uptake with high capacity with the assistance of the polymeric ligands. Based on the tunable structure of MMCs, the role of the polymeric ligands and metallic center was investigated. Thereinto, MMCs-3 with dual polymeric ligands presented higher NH3 adsorption capacity and reversibility of adsorbents compared with MMCs containing a single polymeric ligand (MMCs-1 and MMCs-2). Combined with the NH3 adsorption test, characterization of FT-IR, UV-vis, EPR spectroscopy, NH3-TPD measurement, and the DFT calculations, it was found that the neutral polymeric ligands PVIm contributed to improve the stability of MMCs-3 under a NH3 atmosphere for the tough networks of PVIm-M(II), while the polymeric ligands with a carboxylate anion together with M(II) enhanced the NH3 capacity for the feasible coordination of a carboxylate anion with M(II). The mechanism of NH3 uptake by PVIm-Co-PVBA was proposed that the NH3 was fixed through the coordination with Co(II) along with the departure of PVBA and the following hydrogen bonding interaction with PVBA, while the coordination between PVIm and Co(II) was not destroyed. Thus, MMCs-3 with dual polymeric ligands presented a higher NH3 uptake capacity and stability. Optimally, PVIm-M-PVBA with the metal center of Co(II), Cu(II), and Ni(II) were obtained with a high capacity of 20.8-23.7 NH3 mmol/g at 25 °C and 1 bar and a high selectivity of NH3 over CO2 (54.9-99.9) and N2 (73.0-187.6) through the breakthrough measurement with a gas mixture of 0.2% NH3, 2% CO2, and 99.6% N2 at 25 °C.
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Affiliation(s)
- Xiaoyan Luo
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Renhui Ling
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Runjia Xing
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Yibang Liu
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Jiahui Wan
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Mingxing Li
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Key Laboratory of Molecular Designing and Green Conversions (Fujian Province University), College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China
| | - Congmin Wang
- Department of Chemistry, Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou 310027, P. R. China
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3
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Dai JW, Li YQ, Li ZY, Zhang HT, Herrmann C, Kumagai S, Damjanović M, Enders M, Nojiri H, Morimoto M, Hoshino N, Akutagawa T, Yamashita M. Dual-radical-based molecular anisotropy and synergy effect of semi-conductivity and valence tautomerization in a photoswitchable coordination polymer. Natl Sci Rev 2023; 10:nwad047. [PMID: 37476568 PMCID: PMC10354699 DOI: 10.1093/nsr/nwad047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/05/2022] [Accepted: 12/27/2022] [Indexed: 07/22/2023] Open
Abstract
Organic radicals are widely used as linkers or ligands to synthesize molecular magnetic materials. However, studies regarding the molecular anisotropies of radical-based magnetic materials and their multifunctionalities are rare. Herein, a photoisomerizable diarylethene ligand was used to form {[CoIII(3,5-DTSQ·-)(3,5-DTCat2-)]2(6F-DAE-py2)}·3CH3CN·H2O (o-1·3CH3CN·H2O, 6F-DAE-py2 = 1,2-bis(2-methyl-5-(4-pyridyl)-3-thienyl)perfluorocyclopentene), a valence-tautomeric (VT) coordination polymer. We directly observed dual radicals for a single crystal using high-field/-frequency (∼13.3 T and ∼360 GHz) electron paramagnetic resonance (EPR) spectroscopy along the c-axis, which was further confirmed by angle-dependent Q-band EPR spectroscopy. Moreover, a conductive anomaly close to the VT transition temperature was observed only when probes were attached at the ab plane of the single crystal, indicative of synergy between valence tautomerism and conductivity. Structural anisotropy studies and density functional theory (DFT) calculations revealed that this synergy is due to electron transfer associated with valence tautomerism. This study presents the first example of dual-radical-based molecular anisotropy and charge-transfer-induced conductive anisotropy in a photoswitchable coordination polymer.
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Affiliation(s)
| | | | | | - Hai-Tao Zhang
- Institute of Inorganic and Applied Chemistry, University of Hamburg, Hamburg22761, Germany
| | - Carmen Herrmann
- Institute of Inorganic and Applied Chemistry, University of Hamburg, Hamburg22761, Germany
| | - Shohei Kumagai
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai980-8578, Japan
| | - Marko Damjanović
- Institute of Inorganic Chemistry, University of Heidelberg, HeidelbergD-69120, Germany
| | - Markus Enders
- Institute of Inorganic Chemistry, University of Heidelberg, HeidelbergD-69120, Germany
| | - Hiroyuki Nojiri
- Institute for Materials Research, Tohoku University, Sendai980-8577, Japan
| | | | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai980-8577, Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai980-8577, Japan
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4
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Hay MA, Janetzki JT, Kumar VJ, Gable RW, Clérac R, Starikova AA, Low PJ, Boskovic C. Modulation of Charge Distribution in Cobalt-α-Diimine Complexes toward Valence Tautomerism. Inorg Chem 2022; 61:17609-17622. [DOI: 10.1021/acs.inorgchem.2c02659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moya A. Hay
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jett T. Janetzki
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Varshini J. Kumar
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
| | - Robert W. Gable
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Rodolphe Clérac
- University of Bordeaux, CNRS, CRPP, UMR 5031, F-33600 Pessac, France
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry, Southern Federal University, 344090 Rostov-on-Don, Russian Federation
| | - Paul J. Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
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5
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Starikov AG, Starikova AA, Shapovalova SO, Guda AA, Soldatov AV. 1,10-Phenanthroline-5,6-dione-bridged FeCo complexes: a DFT investigation of the electronic lability. Struct Chem 2022. [DOI: 10.1007/s11224-022-02077-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Starikova AA, Chegerev MG, Starikov AG, Minkin VI. o-Benzoquinone Cobalt Complexes Bearing Organosilicon Radicals: Quantum-Chemical Study. RUSS J COORD CHEM+ 2022. [DOI: 10.1134/s1070328422040054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Xue S, Solre GFB, Wang X, Wang L, Guo Y. Vapor-triggered reversible crystal transformation of a nickel-based magnetic molecular switch. Chem Commun (Camb) 2022; 58:1954-1957. [PMID: 35043804 DOI: 10.1039/d1cc06076g] [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
Vapor-triggered crystal-to-crystal transformation between a discrete trinuclear complex [Ni3(sih)2(py)8] and a two-dimensional (2D) coordination polymer [Ni3(sih)2(py)2]n·2DMF·2H2O was demonstrated. It provides an example of a solid-state coordination-induced spin state switch behavior attributed to the structural phase transition triggered by solvent signal. The reversible nature can be detected by both optical (spectral) and magnetic responses in cycles.
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Affiliation(s)
- Shufang Xue
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Gideon F B Solre
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Xiaoqin Wang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Liang Wang
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Yunnan Guo
- Department of Chemistry, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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8
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Shen KY, Zhang CJ, Qu LY, Jiang SQ, Zhang Y, Tong ML, Bao X. Thermodriven, Acidity-Driven, and Photodriven Spin-State Switching in Pyridylacylhydrazoneiron(II) Complexes at or above Room Temperature. Inorg Chem 2021; 60:18225-18233. [PMID: 34784709 DOI: 10.1021/acs.inorgchem.1c02866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The magnetic bistability of spin-crossover (SCO) materials is highly appealing for applications as molecular switches and information storage. However, switching of the spin state around room temperature remains challenging. In this work, we reported the successful manipulation of the spin states of two iron(II) complexes (1-Fe and 2-Fe) based on pyridylacylhydrazone ligands in manifold ways. Both complexes are stabilized in the low-spin (LS) state at room temperature because of the strong ligand-field strength imposed by the ligands. 2-Fe shows thermoinduced SCO above room temperature with a very large and reproducible hysteresis (>50 K), while 1-Fe remains in the LS state up to 400 K. Acidity-driven spin-state switching of the two complexes was achieved at room temperature as a result of the complex dissociation and release of iron(II) in its high-spin (HS) state. Recovery of the complex is feasible upon further alkalization treatment in the case of 1-Fe, allowing bidirectional modulation of the spin state of the metal center. Light-driven one-way switching from LS to HS is also achieved by virtue of E-to-Z isomerization at the C═N double bond, which results in dissociation of the complex because of the poor binding affinity in the Z configuration.
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Affiliation(s)
- Kai Yan Shen
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Chen Ju Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Lei Yu Qu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Shi Qing Jiang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Yi Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Ming Liang Tong
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Xin Bao
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
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9
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Protasenko NA, Poddelskii AI, Rumyantsev RV, Yakushev IA, Cherkasov VK. Cobalt(III) Bis-o-semiquinone Complexes with 1-Aryl-3,5-Diphenylformazan Ligands: Synthesis, Structures, and Magnetic Properties. RUSS J COORD CHEM+ 2021. [DOI: 10.1134/s1070328421100067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Starikov AG, Starikova AA, Chegerev MG, Aldoshin SM, Metelitsa AV, Minkin VI. Spin‐State‐Switching Rearrangements of Bis(dioxolene)‐Bridged CrCo Complexes: A DFT Study. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrey G. Starikov
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Maxim G. Chegerev
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Sergey M. Aldoshin
- Institute of Problems of Chemical Physics Russian Academy of Sciences 1 Acad. Semenov Avenue 142432 Chernogolovka Russian Federation
| | - Anatoly V. Metelitsa
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Vladimir I. Minkin
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
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11
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Janetzki JT, Zahir FZM, Gable RW, Phonsri W, Murray KS, Goerigk L, Boskovic C. A Convenient DFT-Based Strategy for Predicting Transition Temperatures of Valence Tautomeric Molecular Switches. Inorg Chem 2021; 60:14475-14487. [PMID: 34494829 DOI: 10.1021/acs.inorgchem.1c02273] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The ability to identify promising candidate switchable molecules computationally, prior to synthesis, represents a considerable advance in the development of switchable molecular materials. Even more useful would be the possibility of predicting the switching temperature. Cobalt-dioxolene complexes can exhibit thermally induced valence tautomeric switching between low-spin CoIII-catecholate and high-spin CoII-semiquinonate forms, where the half-temperature (T1/2) is the temperature at which there are equal amounts of the two tautomers. We report the first simple computational strategy for accurately predicting T1/2 values for valence tautomeric complexes. Dispersion-corrected density functional theory (DFT) methods have been applied to the [Co(dbdiox)(dbsq)(N2L)] (dbdiox/dbsq•- = 3,5-di-tert-butyldioxolene/semiquinonate; N2L = diimine) family of valence tautomeric complexes, including the newly reported [Co(dbdiox)(dbsq)(MeO-bpy)] (1) (MeO-bpy = 4,4'-dimethoxy-2,2'-bipyridine). The DFT strategy has been thoroughly benchmarked to experimental data, affording highly accurate spin-distributions and an excellent energy match between experimental and calculated spin-states. Detailed orbital analysis of the [Co(dbdiox)(dbsq)(N2L)] complexes has revealed that the diimine ligand tunes the T1/2 value primarily through π-acceptance. We have established an excellent correlation between experimental T1/2(toluene) values for [Co(dbdiox)(dbsq)(N2L)] complexes and the calculated lowest unoccupied molecular orbital energy of the corresponding diimine ligand. The model affords accurate T1/2(toluene) values for [Co(dbdiox)(dbsq)(N2L)] complexes, with an average error of only 3.7%. This quantitative and simple DFT strategy allows experimentalists to not only rapidly identify proposed VT complexes but also predict the transition temperature. This study lays the groundwork for future in silico screening of candidate switchable molecules prior to experimental investigation, with associated time, cost, and environmental benefits.
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Affiliation(s)
- Jett T Janetzki
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - F Zahra M Zahir
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Robert W Gable
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Wasinee Phonsri
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Keith S Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Lars Goerigk
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
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12
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Chegerev MG, Starikov AG, Starikova AA. Quantum Chemical Study of Spin Transitions in the Bimetallic Fe/Co Complexes with the Bis(catecholate) Bridging Ligand. RUSS J COORD CHEM+ 2021. [DOI: 10.1134/s1070328421090013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Abstract
The computational modeling of the spatial and electronic structures, energy characteristics, and magnetic properties of the bimetallic iron and cobalt complexes with 9,10-dimethyl-9,10-ethano-9,10-dihydro-2,3,6,7-tetrahydroxyanthracene and terminal tris(2-pyridylmethyl)amine bases is performed using the density functional theory method (DFT UTPSSh/6-311++G(d,p)). The chosen tetradentate redox ligand is shown to be a promising precursor for the production of magnetically active compounds. The calculations make it possible to establish a relationship between the relative energies of the electronic isomers of the complexes and the structures of the ancillary N-donor moieties. The coordination compounds prone to the manifestation of spin transitions accompanied by a change in the magnetic properties are revealed.
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13
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Mörtel M, Oschwald J, Scheurer A, Drewello T, Khusniyarov MM. Molecular Valence Tautomeric Metal Complexes for Chemosensing. Inorg Chem 2021; 60:14230-14237. [PMID: 34403241 DOI: 10.1021/acs.inorgchem.1c01731] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Switchable valence tautomeric metal complexes have been long suggested for applications as chemosensors. However, no such molecular sensors have been yet reported. Here, we present a concept for sensing and the first prototype molecular sensor based on valence tautomeric cobalt-dioxolenes. A valence tautomeric cobalt-dioxolene complex [ls-CoIII(SQ•)(Cat)(stypy)2] ⇄ [hs-CoII(SQ•)2(stypy)2] 1 (ls = low spin, hs = high spin, Cat = 3,5-di-tert-butylcatecholate(2-), SQ = one-electron oxidized, benzosemiquinone(1-) form of Cat, stypy = trans-4-styrylpyridine) has been used as a molecular sensor. The lability of axial stypy ligands of 1 in solution allows us to exchange stypy ligands by dimethyl sulfoxide and simple pyridine analytes in a controllable way, which triggers colorimetric and magnetic responses.
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Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Johannes Oschwald
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Andreas Scheurer
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Thomas Drewello
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Marat M Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
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14
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Chegerev MG, Starikova AA. Electronic Lability of Quinonoid‐Bridged Dinuclear 3 d‐Metal Complexes with Tetradentate N‐Donor Bases. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100200] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Maxim G. Chegerev
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
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15
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Chegerev MG, Starikova AA, Starikov AG, Minkin VI. Electronic Structure and Magnetic Properties of Mixed-Ligand Cobalt Complexes Containing Organogermanium Triangulenes. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363220120142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Valence tautomerism and delocalization in transition metal complexes of o-amidophenolates and other redox-active ligands. Some recent results. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213240] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Abstract
The synthesis and characterization of a series of homoleptic iron complexes [Fe(benzNHCOCO)2]2-/1-/0/1+ supported by the tridentate bis-aryloxide benzimidazolin-2-ylidene pincer ligand benzNHCOCO2- (II) is presented. While the reaction of 2 equiv of free ligand II with a ferrous iron precursor leads to the isolation of the coordination polymer [Fe(benzNHCOCOK)2]n (1), treatment of II with ferric iron salts allows for the synthesis and isolation of the mononuclear, octahedral bis-pincer compound K[Fe(benzNHCOCO)2] (2) and its crown-ether derivative [K(18c6)(THF)2][Fe(benzNHCOCO)2] (3). Electrochemical studies of 2 suggested stable products upon further one- and two-electron oxidation. Hence, treatment of 2 with 1 equiv of AgPF6 yields the charge-neutral species [Fe(benzNHCOCO)2] (4). Similarly, the cationic complex [Fe(benzNHCOCO)2]PF6 (5) is obtained by addition of 2 equiv of AgPF6. The characterization of complexes 1, 3, and 4 reveals iron-centered reduction and oxidation processes; thus, preserving the dianionic, closed-shell structure of both coordinated benzNHCOCO pincer chelates, II. This implies a stabilization of a highly Lewis acidic iron(IV) center by four phenolate anions rather than charge distribution across the ligand framework with a lower formal oxidation state at iron. Notably, the overall charge-neutral iron(IV) complex undergoes reductive elimination of the pincer ligand, providing a metal-free compound that can be described as a spirocyclic imidazolone ketal (6). In contrast, the ligand-metal bonds in 5, formally an iron(V) complex, are considerably covalent, rendering the assignment of its oxidation state challenging, if not impossible. All compounds are fully characterized, and the complexes' electronic structures were studied with a variety of spectroscopic and computational methods, including single-crystal X-ray diffraction (SC-XRD), X-band electron paramagnetic resonance (EPR), and zero-field 57Fe Mössbauer spectroscopy, variable-field and variable-temperature superconducting quantum interference device (SQUID) magnetization measurements, and multi-reference ab initio (NEVPT2/CASSCF) as well as density functional theory (DFT) studies. Taken altogether, the electronic structure of 5 is best described as an iron(IV) center antiferromagnetically coupled to a ligand-centered radical.
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Affiliation(s)
- Lisa Gravogl
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Frank W Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Dominik Munz
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
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18
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Sorsche D, Miehlich ME, Searles K, Gouget G, Zolnhofer EM, Fortier S, Chen CH, Gau M, Carroll PJ, Murray CB, Caulton KG, Khusniyarov MM, Meyer K, Mindiola DJ. Unusual Dinitrogen Binding and Electron Storage in Dinuclear Iron Complexes. J Am Chem Soc 2020; 142:8147-8159. [DOI: 10.1021/jacs.0c01488] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Dieter Sorsche
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Matthias E. Miehlich
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Keith Searles
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Guillaume Gouget
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Eva M. Zolnhofer
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Skye Fortier
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Chun-Hsing Chen
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Michael Gau
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Christopher B. Murray
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Kenneth G. Caulton
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Marat M. Khusniyarov
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Karsten Meyer
- Inorganic Chemistry, Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Daniel J. Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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19
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Starikova AA, Chegerev MG, Starikov AG. Mononuclear Cobalt and Iron o-Quinone Complexes with Tetradentate N-Donor Bases: Structures and Properties. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s1070328420030070] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Affiliation(s)
- Dominique Luneau
- CNRS Laboratoire des Multimatériaux et Interfaces Univ Lyon Université Claude Bernard Lyon 1 69622 Villeurbanne France
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21
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Lecourt C, Izumi Y, Khrouz L, Toche F, Chiriac R, Bélanger-Desmarais N, Reber C, Fabelo O, Inoue K, Desroches C, Luneau D. Thermally-induced hysteretic valence tautomeric conversions in the solid state via two-step labile electron transfers in manganese-nitronyl nitroxide 2D-frameworks. Dalton Trans 2020; 49:15646-15662. [PMID: 33156311 DOI: 10.1039/d0dt03243c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Near room temperature hysteretic thermo-induced valence tautomerism was discovered in a layered 2D-coordination polymer of manganese(ii) with nitronyl nitroxide radicals separated by ClO4- anions (1). This opens a novel approach towards switchable materials with hysteresis and under ambient conditions with prospects for applications and for investigating solid-state intramolecular electron transfers. Herein, two new compounds with similar layered structures where the anions (X) are BF4- (2) or PF6- (3) are presented. Their magnetic behaviors also reveal hysteretic thermo-induced valence tautomeric conversions but in two steps and evidencing a strong effect of the anion. This occurs near room temperature (278-220 K) for 2 and higher for 3 (380-330 K). Their single crystal structures at different temperatures show that this involves two successive thermally-triggered electron transfers with switching between three redox tautomers formulated as {[MnII2-yMnIIIy(NITIm)3-y(NITRed)y]X}n, where y is temperature dependent. Upon cooling from the high-temperature redox-tautomer (y = 0) to the intermediate one (y = 1), half of the manganese(ii) centers are oxidized to manganese(iii) and 1/3 of the nitronyl nitroxide radicals (NITIm-) are reduced to the aminoxyl form (NITRed2-). On further cooling, the second half of the manganese(ii) centers are oxidized and another 1/3 of the radicals are reduced to reach the low-temperature redox-tautomer (y = 2). Upon reheating, reverse electron transfers occur. This is complementarily supported by X-ray powder measurements, differential scanning calorimetry, and electron paramagnetic resonance and Raman spectroscopies. These multi-stable compounds in which manganese ions exchange reversibly their electron with the nitronyl nitroxide radical are outstanding rare examples of two-step valence tautomerism in the solid state promoted by the polymeric structure.
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Affiliation(s)
- Constance Lecourt
- Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France.
| | - Yuuta Izumi
- Department of Chemistry, Graduate School of Science and Chirality Research Center (CResCent), Hiroshima University, 1-3-1, Kagamiyama, Higashi Hiroshima, Hiroshima, 739-8526, Japan
| | - Lhoussain Khrouz
- Univ Lyon, ENS de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
| | - François Toche
- Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France.
| | - Rodica Chiriac
- Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France.
| | | | - Christian Reber
- Département de chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Oscar Fabelo
- Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Katsuya Inoue
- Department of Chemistry, Graduate School of Science and Chirality Research Center (CResCent), Hiroshima University, 1-3-1, Kagamiyama, Higashi Hiroshima, Hiroshima, 739-8526, Japan
| | - Cédric Desroches
- Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France.
| | - Dominique Luneau
- Laboratoire des Multimatériaux et Interfaces, UMR CNRS 5615, Univ Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France.
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22
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Mörtel M, Seller M, Heinemann FW, Khusniyarov MM. A valence tautomeric cobalt-dioxolene complex with an anchoring group for prospective chemical grafting to metal oxides. Dalton Trans 2020; 49:17532-17536. [PMID: 33300528 DOI: 10.1039/d0dt03771k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Here, we synthesized a valence tautomeric cobalt-dioxolene complex featuring a protected anchoring group. At room temperature, the complex reveals a nearly pure low-spin-Co(iii)-catecholate state in the solid state, but a nearly pure high-spin-Co(ii)-semiquinonate state in toluene solution. Thermal switchability of the complex in solution and in the solid state is investigated.
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Affiliation(s)
- Max Mörtel
- Friedrich-Alexander University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Egerlandstr. 1, 91058, Erlangen, Germany.
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23
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Gransbury GK, Boulon ME, Mole RA, Gable RW, Moubaraki B, Murray KS, Sorace L, Soncini A, Boskovic C. Single-ion anisotropy and exchange coupling in cobalt(ii)-radical complexes: insights from magnetic and ab initio studies. Chem Sci 2019; 10:8855-8871. [PMID: 31803460 PMCID: PMC6853083 DOI: 10.1039/c9sc00914k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 07/27/2019] [Indexed: 01/18/2023] Open
Abstract
The concurrent effects of single-ion anisotropy and exchange interactions on the electronic structure and magnetization dynamics have been analyzed for a cobalt(ii)-semiquinonate complex. Analogs containing diamagnetic catecholate and tropolonate ligands were employed for comparison of the magnetic behavior and zinc congeners assisted with the spectroscopic characterization and assessment of intermolecular interactions in the cobalt(ii) compounds. Low temperature X-band (ν ≈ 9.4 GHz) and W-Band (ν ≈ 94 GHz) electron paramagnetic resonance spectroscopy and static and dynamic magnetic measurements have been used to elucidate the electronic structure of the high spin cobalt(ii) ion in [Co(Me3tpa)(Br4cat)] (1; Me3tpa = tris[(6-methyl-2-pyridyl)methyl]amine, Br4cat2- = tetrabromocatecholate) and [Co(Me3tpa)(trop)](PF6) (2(PF6); trop- = tropolonate), which show slow relaxation of the magnetization in applied field. The cobalt(ii)-semiquinonate exchange interaction in [Co(Me3tpa)(dbsq)](PF6)·tol (3(PF6)·tol; dbsq- = 3,5-di-tert-butylsemiquinonate, tol = toluene) has been determined using an anisotropic exchange Hamiltonian in conjunction with multistate restricted active space self-consistent field ab initio modeling and wavefunction analysis, with comparison to magnetic and inelastic neutron scattering data. Our results demonstrate dominant ferromagnetic exchange for 3+ that is of similar magnitude to the anisotropy parameters of the cobalt(ii) ion and contains a significant contribution from spin-orbit coupling. The nature of the exchange coupling between octahedral high spin cobalt(ii) and semiquinonate ligands is a longstanding question; answering this question for the specific case of 3+ has confirmed the considerable sensitivity of the exchange to the molecular structure. The methodology employed will be generally applicable for elucidating exchange coupling between orbitally-degenerate metal ions and radical ligands and relevant to the development of bistable molecules and their integration into devices.
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Affiliation(s)
- Gemma K Gransbury
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Marie-Emmanuelle Boulon
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Richard A Mole
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001 , Kirrawee DC , New South Wales 2232 , Australia
| | - Robert W Gable
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Boujemaa Moubaraki
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Keith S Murray
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Lorenzo Sorace
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Alessandro Soncini
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Colette Boskovic
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
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24
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Starikova AA, Chegerev MG, Starikov AG, Minkin VI. Rational Design of Electronically Labile Dinuclear Fe and Co complexes with 1,10-Phenanthroline-5,6-Diimine: A DFT study. J Comput Chem 2019; 40:2284-2292. [PMID: 31228286 DOI: 10.1002/jcc.26005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 01/27/2023]
Abstract
A series of coordination compounds of redox-active 1,10-phenanthroline-5,6-diimine with CoII bis-diketonates and FeII dihydrobis(pyrazolyl)borates has been computationally designed by means of density functional theory (DFT UB3LYP*/6-311++G(d,p)) calculations of their electronic structure, energy characteristics, and magnetic properties. Four types of complexes differing by the nature and position of the terminal metal-centered fragments have been considered. The performed systematic calculations have revealed the systems capable of undergoing thermally initiated spin-state switching rearrangements, including those governed by the synchronized mechanisms of spin crossover and valence tautomerism. The predicted magnetic characteristics allow one to consider the dinuclear cobalt complexes and heterometallic Co/Fe compounds with 1,10-phenanthroline-5,6-diimine as building blocks for molecular and quantum electronics devices. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Alyona A Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
| | - Maxim G Chegerev
- Institute of Physical and Organic Chemistry at Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
| | - Andrey G Starikov
- Institute of Physical and Organic Chemistry at Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
| | - Vladimir I Minkin
- Institute of Physical and Organic Chemistry at Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
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25
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Li B, Zhao YM, Kirchon A, Pang JD, Yang XY, Zhuang GL, Zhou HC. Unconventional Method for Fabricating Valence Tautomeric Materials: Integrating Redox Center within a Metal-Organic Framework. J Am Chem Soc 2019; 141:6822-6826. [PMID: 30986355 DOI: 10.1021/jacs.9b02375] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Due to the structural advantages displayed by Metal-Organic Frameworks (MOFs), integrating Valence Tautomerism (VT) systems within MOFs could be an effective strategy in order to break through the constraints of the traditional ones. Herein, we report the first successful integration of a VT system into a MOF termed VT-MOF-1. The structural characteristics of VT-MOF-1, such as dinuclear cobalt-catechol clusters and solvent-accessible pores, are both innovative and novel, potentially yielding new vitality within VT field. In addition, VT-MOF-1 exhibits specific behaviors responsive to temperature and different solvent molecules as n-butanol, tert-butanol, and isopropyl alcohol. The entropy values and configurations of the solvent molecules might be responsible for the tunable sensing behaviors.
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Affiliation(s)
- Bao Li
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan , Hubei 430074 , People's Republic of China.,Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Yu-Meng Zhao
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan , Hubei 430074 , People's Republic of China
| | - Angelo Kirchon
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Jian-Dong Pang
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Xin-Yu Yang
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Gui-Lin Zhuang
- Institute of Industrial Catalysis, College of Chemical Engineering , Zhejiang University of Technology , Zhejiang 310023 , People's Republic of China
| | - Hong-Cai Zhou
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States.,Department of Materials Science and Engineering , Texas A&M University , College Station , Texas 77842 , United States
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26
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Gransbury GK, Boulon ME, Petrie S, Gable RW, Mulder RJ, Sorace L, Stranger R, Boskovic C. DFT Prediction and Experimental Investigation of Valence Tautomerism in Cobalt-Dioxolene Complexes. Inorg Chem 2019; 58:4230-4243. [DOI: 10.1021/acs.inorgchem.8b03291] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Gemma K. Gransbury
- School of Chemistry, University of Melbourne, Melbourne, VIC 3010, Australia
| | - Marie-Emmanuelle Boulon
- UdR INSTM and Department of Chemistry “U. Schiff”, University of Florence, 50019 Sesto Fiorentino, FI, Italy
| | - Simon Petrie
- Research School of Chemistry, College of Physical & Mathematical Sciences, Australian National University, Canberra, ACT 2601, Australia
| | - Robert W. Gable
- School of Chemistry, University of Melbourne, Melbourne, VIC 3010, Australia
| | | | - Lorenzo Sorace
- UdR INSTM and Department of Chemistry “U. Schiff”, University of Florence, 50019 Sesto Fiorentino, FI, Italy
| | - Robert Stranger
- Research School of Chemistry, College of Physical & Mathematical Sciences, Australian National University, Canberra, ACT 2601, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Melbourne, VIC 3010, Australia
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27
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Safaei E, Balaghi SE, Chiang L, Clarke RM, Martelino D, Webb MI, Wong EWY, Savard D, Walsby CJ, Storr T. Stabilization of different redox levels of a tridentate benzoxazole amidophenoxide ligand when bound to Co(iii) or V(v). Dalton Trans 2019; 48:13326-13336. [DOI: 10.1039/c9dt02865j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The electronic structure of Co and V complexes of a tridentate benzoxazole-containing aminophenol ligand NNOH2 were characterized by both experimental and theoretical methods.
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Affiliation(s)
- Elham Safaei
- Department of Chemistry
- College of Science
- Shiraz University
- Shiraz
- Iran
| | | | - Linus Chiang
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Ryan M. Clarke
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Diego Martelino
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Michael I. Webb
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Edwin W. Y. Wong
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Didier Savard
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Charles J. Walsby
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
| | - Tim Storr
- Department of Chemistry
- Simon Fraser University
- 8888 University Drive
- Burnaby
- Canada
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28
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Panja A, Frontera A. Valence-Tautomerism-Driven Aromatic Nucleophilic Substitution in Cobalt-Bound Tetrabromocatecholate Ligands - Influence of Positive Charge at the Ligand Backbone on Phenoxazinone Synthase Activity. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701176] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Anangamohan Panja
- Postgraduate Department of Chemistry; Panskura Banamali College; WB 721152 Panskura RS India
| | - Antonio Frontera
- Departament de Química; Universitat de les Illes Balears; Crta. de Valldemossa km 7.5 07122 Palma de Mallorca (Baleares) Spain
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29
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Brandenburg H, Krahmer J, Fischer K, Schwager B, Flöser B, Näther C, Tuczek F. Coordination-Induced Spin-State Switching with Nickel(II) salpn Complexes: Electronic versus Steric Effects and Influence of Intermolecular Interactions. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701281] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hannah Brandenburg
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Jan Krahmer
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Kim Fischer
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Bettina Schwager
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Benedikt Flöser
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Christian Näther
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie; Christian-Albrechts-Universität Kiel; Max-Eyth-Str. 2 24118 Kiel Germany
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30
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Liu HB, Han HS, Lan B, Xiao DM, Liang J, Zhang ZY, Wang J. Cobalt metal-mixed organic complex-based hybrid micromaterials: ratiometric detection of cyanide. RSC Adv 2018; 8:4900-4904. [PMID: 35539523 PMCID: PMC9077790 DOI: 10.1039/c8ra00079d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 01/22/2018] [Indexed: 11/27/2022] Open
Abstract
A micrometer-sized hybrid crystalline material was facilely fabricated from the synergistic coordination chemistry of two types of 2-hydroxyazobenzene building blocks and cobalt ions. This hybrid crystalline material functioned as both receptor and signal reporter in cyanide (CN−) sensing with ratiometric absorption responses at 456 nm and 537 nm. The mechanism of CN− sensing involves partial ligand dissociation accompanied by the formation of a new organic metal–CN− adduct. We believe that this protocol would be valuable in achieving the expected selectivities and sensitivities for a wide variety of analytes in many chemical and biological systems in the future. A cobalt metal-mixed organic complex-based hybrid micromaterial has been presented to detect CN− with ratiometric absorption responses (A456 nm/A537 nm).![]()
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Affiliation(s)
- Hai-Bo Liu
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - He-Song Han
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - Bin Lan
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - Dong-Mei Xiao
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - Jing Liang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - Zi-Ying Zhang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
| | - Jing Wang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning 530004
- P. R. China
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31
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Reu O, Ostrovsky S, Decurtins S, Liu SX, Klokishner S. Electric Field Control of the Valence-Tautomeric Transformation in Cobalt Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700849] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Oleg Reu
- Department of Semiconductors; Institute of Applied Physics; Academy str. 5 MD-2028 Kishinev Moldova
| | - Serghei Ostrovsky
- Department of Semiconductors; Institute of Applied Physics; Academy str. 5 MD-2028 Kishinev Moldova
| | - Silvio Decurtins
- Departement für Chemie und Biochemie; Universität Bern; Freiestrasse 3 3012 Bern Switzerland
| | - Shi-Xia Liu
- Departement für Chemie und Biochemie; Universität Bern; Freiestrasse 3 3012 Bern Switzerland
| | - Sophia Klokishner
- Department of Semiconductors; Institute of Applied Physics; Academy str. 5 MD-2028 Kishinev Moldova
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32
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Mörtel M, Witt A, Heinemann FW, Bochmann S, Bachmann J, Khusniyarov MM. Synthesis, Characterization, and Properties of Iron(II) Spin-Crossover Molecular Photoswitches Functioning at Room Temperature. Inorg Chem 2017; 56:13174-13186. [DOI: 10.1021/acs.inorgchem.7b01952] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Alexander Witt
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Sebastian Bochmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Julien Bachmann
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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33
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34
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Molecular magnetism, quo vadis? A historical perspective from a coordination chemist viewpoint☆. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.004] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Liang HW, Kroll T, Nordlund D, Weng TC, Sokaras D, Pierpont CG, Gaffney KJ. Charge and Spin-State Characterization of Cobalt Bis(o-dioxolene) Valence Tautomers Using Co Kβ X-ray Emission and L-Edge X-ray Absorption Spectroscopies. Inorg Chem 2016; 56:737-747. [DOI: 10.1021/acs.inorgchem.6b01666] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Winnie Liang
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
- PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Thomas Kroll
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Tsu-Chien Weng
- Center for High Pressure Science & Technology Advanced Research, Pudong, Shanghai 201203, P. R. China
| | - Dimosthenis Sokaras
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Cortlandt G. Pierpont
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Kelly J. Gaffney
- PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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36
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Lannes A, Suffren Y, Tommasino JB, Chiriac R, Toche F, Khrouz L, Molton F, Duboc C, Kieffer I, Hazemann JL, Reber C, Hauser A, Luneau D. Room Temperature Magnetic Switchability Assisted by Hysteretic Valence Tautomerism in a Layered Two-Dimensional Manganese-Radical Coordination Framework. J Am Chem Soc 2016; 138:16493-16501. [DOI: 10.1021/jacs.6b10544] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Anthony Lannes
- Univ Lyon, Université
Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces,
UMR CNRS 5615, F-69622, Villeurbanne, France
| | - Yan Suffren
- Département
de Chimie Physique, Université de Genève, 30 Quai
Ernest-Ansermet, 1211 Genève 4, Switzerland
| | - Jean Bernard Tommasino
- Univ Lyon, Université
Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces,
UMR CNRS 5615, F-69622, Villeurbanne, France
| | - Rodica Chiriac
- Univ Lyon, Université
Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces,
UMR CNRS 5615, F-69622, Villeurbanne, France
| | - François Toche
- Univ Lyon, Université
Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces,
UMR CNRS 5615, F-69622, Villeurbanne, France
| | - Lhoussain Khrouz
- Univ Lyon, ENS de Lyon,
CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire
de Chimie, F69342, Lyon, France
| | - Florian Molton
- Département de Chimie
Moléculaire (UMR 5250), Université Joseph Fourier, Grenoble, France
| | - Carole Duboc
- Département de Chimie
Moléculaire (UMR 5250), Université Joseph Fourier, Grenoble, France
| | - Isabelle Kieffer
- BM30B/FAME Beamline, European Synchrotron for Research Facility (ESRF), Grenoble, France
- Observatoire des Sciences de l’Univers
de Grenoble (OSUG), CNRS UMS 832, 414
rue de la piscine, 38400 Saint Martin d’Hères, France
| | - Jean-Louis Hazemann
- BM30B/FAME Beamline, European Synchrotron for Research Facility (ESRF), Grenoble, France
- Institut
Néel, UPR 2940 CNRS, Grenoble, France
| | - Christian Reber
- Département de Chimie, Université de Montréal, Montréal, Canada
| | - Andreas Hauser
- Département
de Chimie Physique, Université de Genève, 30 Quai
Ernest-Ansermet, 1211 Genève 4, Switzerland
| | - Dominique Luneau
- Univ Lyon, Université
Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces,
UMR CNRS 5615, F-69622, Villeurbanne, France
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37
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Li GL, Kanegawa S, Yao ZS, Su SQ, Wu SQ, Huang YG, Kang S, Sato O. Influence of Intermolecular Interactions on Valence Tautomeric Behaviors in Two Polymorphic Dinuclear Cobalt Complexes. Chemistry 2016; 22:17130-17135. [PMID: 27629522 DOI: 10.1002/chem.201603817] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Indexed: 11/05/2022]
Abstract
Two polymorphic structures have been well determined in a valence tautomeric (VT) dinuclear cobalt complex. These polymorphs showed distinct thermal- and photomagnetic behavior, and are thus ideal for studying the "pure" intermolecular factors to VT transitions. In polymorph 1A, the VT cations are arranged head-to-waist with their neighbors and exhibit weak π⋅⋅⋅π interactions, resulting in a gradual and incomplete thermal VT transition. In contrast, the cations in polymorph 1B are arranged head-to-tail and exhibit relatively strong π⋅⋅⋅π interactions, leading to an abrupt and complete thermal VT transition with adjustable hysteresis loop at around room temperature. The VT process for both polymorphs can be induced by light, but the light-excited state of 1B⋅2H2 O has a higher thermal relaxation temperature than that of 1A⋅3H2 O.
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Affiliation(s)
- Guo-Ling Li
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Shinji Kanegawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Zi-Shuo Yao
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Sheng-Qun Su
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Shu-Qi Wu
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - You-Gui Huang
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Soonchul Kang
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
| | - Osamu Sato
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka Nishi-ku, 819-0395, Fukuoka, Japan
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38
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Cioncoloni G, Senn HM, Sproules S, Wilson C, Symes MD. The electronic and solvatochromic properties of [Co(L)(bipyridine) 2] + (L = o-catecholato, o-benzenedithiolato) species: a combined experimental and computational study. Dalton Trans 2016; 45:15575-15585. [PMID: 27722641 DOI: 10.1039/c6dt02807a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexes of Co(iii) containing mixed chelating diimine and o-quinone ligand sets are of fundamental interest on account of their fascinating magnetic and electronic properties. Whilst complexes of this type containing one diimine and two o-quinone ligands have been studied extensively, those with the reverse stoichiometry (two diimines and one o-quinone) are much rarer. Herein, we describe a ready route to the synthesis of the complex [CoIII(o-catecholate) (2,2'-bipyridine)2]+ (1), and also report the synthesis of [CoIII(o-catecholate)(5,5'-dimethyl-2,2'-bipyridine)2]+ (2) and [CoIII(o-benezenedithiolate)(5,5'-dimethyl-2,2'-bipyridine)2]+ (3) for the first time. Spectroscopic studies show that complex 2 displays intriguing solvatochromic behaviour as a function of solvent hydrogen bond donation ability, a property of this type of complex which has hitherto not been reported. Time-dependent density function theory (TD-DFT) shows that this effect arises as a result of hydrogen bonding between the solvent and the oxygen atoms of the catecholate ligand. In contrast, the sulfur atoms in the benzenedithiolate analogue 3 are much weaker acceptors of hydrogen bonds from the solvent, meaning that complex 3 is only very weakly solvatochromic. Finally, we show that complex 2 has some potential as a molecular probe that can report on the composition of mixed solvent systems as a function of its absorbance spectrum.
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Affiliation(s)
- Giacomo Cioncoloni
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Hans M Senn
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Stephen Sproules
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Claire Wilson
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
| | - Mark D Symes
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
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39
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Panja A, Jana NC, Bauzá A, Frontera A, Mathonière C. Solvent-Triggered Cis/Trans Isomerism in Cobalt Dioxolene Chemistry: Distinguishing Effects of Packing on Valence Tautomerism. Inorg Chem 2016; 55:8331-40. [DOI: 10.1021/acs.inorgchem.6b00402] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anangamohan Panja
- Postgraduate
Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India
| | - Narayan Ch. Jana
- Postgraduate
Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India
| | - Antonio Bauzá
- Departament
de Química, Universitat de les Illes Balears, Carretera de
Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | - Antonio Frontera
- Departament
de Química, Universitat de les Illes Balears, Carretera de
Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, Spain
| | - Corine Mathonière
- CNRS, UPR 9048, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Pessac F-33600, France
- Université de Bordeaux, ICMCB, UPR 9048, Pessac F-33600, France
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40
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Drath O, Gable RW, Moubaraki B, Murray KS, Poneti G, Sorace L, Boskovic C. Valence Tautomerism in One-Dimensional Coordination Polymers. Inorg Chem 2016; 55:4141-51. [DOI: 10.1021/acs.inorgchem.5b02812] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olga Drath
- School
of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Robert W. Gable
- School
of Chemistry, University of Melbourne, Victoria 3010, Australia
| | | | - Keith S. Murray
- School
of Chemistry, Monash University, Clayton 3800, Australia
| | - Giordano Poneti
- UdR
INSTM and Department of Chemistry “U. Schiff″, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Lorenzo Sorace
- UdR
INSTM and Department of Chemistry “U. Schiff″, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Colette Boskovic
- School
of Chemistry, University of Melbourne, Victoria 3010, Australia
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41
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Overgaard J, Møller LH, Borup MA, Tricoire M, Walsh JPS, Diehl M, Rentschler E. Magnetism and variable temperature and pressure crystal structures of a linear oligonuclear cobalt bis-semiquinonate. Dalton Trans 2016; 45:12924-32. [DOI: 10.1039/c6dt02024k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The crystal structure of the first oligomeric cobalt dioxolene complex, Co3(3,5-DBSQ)2(tBuCOO)4(NEt3)2, 1, where DBSQ is 3,5-di-tert-butyl-semiquinonate, has been studied at various temperatures between 20 and 200 K.
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Affiliation(s)
- Jacob Overgaard
- Department of Chemistry
- Aarhus University
- 8000 Aarhus C
- Denmark
| | | | - Mette A. Borup
- Department of Chemistry
- Aarhus University
- 8000 Aarhus C
- Denmark
| | - Maxime Tricoire
- Department of Chemistry
- Aarhus University
- 8000 Aarhus C
- Denmark
| | | | - Marcel Diehl
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University Mainz
- D-55128 Mainz
- Germany
- Graduate School Materials Science in Mainz
| | - Eva Rentschler
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University Mainz
- D-55128 Mainz
- Germany
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42
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Witt A, Heinemann FW, Khusniyarov MM. Bidirectional photoswitching of magnetic properties at room temperature: ligand-driven light-induced valence tautomerism. Chem Sci 2015; 6:4599-4609. [PMID: 29568417 PMCID: PMC5851081 DOI: 10.1039/c5sc00130g] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 05/22/2015] [Indexed: 11/30/2022] Open
Abstract
Valence tautomeric (VT) metal complexes are highly promising bistable molecular compounds for applications as molecular switches in molecular electronics and spintronics. Although VT species can be switched with light, the photoswitching in all reported systems requires very low temperatures (usually below 20 K) because photoinduced states are highly unstable at room temperature. The thermal instability hinders any practical application of these complexes in genuine devices. In this report, for the first time we demonstrate photoswitching of VT species and associated magnetic properties at room temperature. The bidirectional photoswitching in solution is due to cis-trans photoisomerizable 4-styrylpyridine ligands deliberately integrated into cobalt dioxolene molecular complexes. The novel type of photoswitching has been coined Ligand-Driven Light-Induced Valence Tautomerism (LD-LIVT). The photoconversion of VT states of 28% has been achieved in solution at room temperature. The photoinduced states show extraordinary thermal stability for hours at room temperature, as compared to common nanoseconds reported previously. The switching proceeds at molecular level with the effective photoswitching rate of 3 × 1013 molecules per s under our conditions. Consequently, this work may open new horizons in applications of molecular switches based on VT metal complexes in molecular devices functioning at room temperature.
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Affiliation(s)
- Alexander Witt
- Friedrich-Alexander-University of Erlangen-Nuremberg , Department of Chemistry and Pharmacy , Egerlandstr. 1 , 91058 Erlangen , Germany . ; ; Tel: +49 9131 8527464
| | - Frank W Heinemann
- Friedrich-Alexander-University of Erlangen-Nuremberg , Department of Chemistry and Pharmacy , Egerlandstr. 1 , 91058 Erlangen , Germany . ; ; Tel: +49 9131 8527464
| | - Marat M Khusniyarov
- Friedrich-Alexander-University of Erlangen-Nuremberg , Department of Chemistry and Pharmacy , Egerlandstr. 1 , 91058 Erlangen , Germany . ; ; Tel: +49 9131 8527464
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43
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Kropp H, Scheurer A, Heinemann FW, Bendix J, Meyer K. Coordination-Induced Spin-State Change in Manganese(V) Complexes: The Electronic Structure of Manganese(V) Nitrides. Inorg Chem 2015; 54:3562-72. [DOI: 10.1021/acs.inorgchem.5b00112] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Henning Kropp
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Andreas Scheurer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
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44
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Slota M, Blankenhorn M, Heintze E, Vu M, Hübner R, Bogani L. Photoswitchable stable charge-distributed states in a new cobalt complex exhibiting photo-induced valence tautomerism. Faraday Discuss 2015; 185:347-59. [DOI: 10.1039/c5fd00088b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis and magnetic and photomagnetic behaviour of a novel valence tautomeric cobalt complex, [Co(3,5-dbbq)2(μ-bpym)] (1) (3,5-dbbq = 3,5-di-tert-butyl-1,2-benzoquinone and μ-bpym = 2,2′-bipyrimidine). The synthesis is performed by reacting Co2(CO)8 and μ-bpym in the presence of the ligand 3,5-dbbq in a mixed solvent under inert atmosphere. The magnetic behavior clearly shows the presence of electron transfer from the catecholate ligand to the cobalt center, producing valence tautomers of [CoII(SQ)2] with a transition temperature (T1/2) of 215 K. Photomagnetic studies, performed via both SQUID magnetometry and X-band electron paramagnetic resonance, show the clear presence of photoinduced valence tautomerism, at temperatures considerably higher than previous systems. A metastable charge distribution is observed, strengthening previous investigations on the character of mixed valence ligands. Entropy-driven valence tautomeric interconversion is observed, and drives the transition to the most stable charge distribution. The complex has the ability to coordinate and can be used as a photoswitchable building block, with the photomagnetic characterisation evidencing a metastable state lifetime of the photo-induced valence tautomeric process of ca. 2.9 × 104 s below 20 K. The observed yields are higher than ones in similar systems, showing that tiny changes in the molecular structures may have a huge impact.
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Affiliation(s)
- Michael Slota
- 1. Physikalisches Institut
- University of Stuttgart
- 70569 Stuttgart
- Germany
- Department of Materials
| | | | - Eric Heintze
- 1. Physikalisches Institut
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Minh Vu
- 1. Physikalisches Institut
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Ralph Hübner
- 1. Physikalisches Institut
- University of Stuttgart
- 70569 Stuttgart
- Germany
| | - Lapo Bogani
- Department of Materials
- University of Oxford
- Oxford
- UK
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45
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Zolnhofer EM, Käß M, Khusniyarov MM, Heinemann FW, Maron L, van Gastel M, Bill E, Meyer K. An Intermediate Cobalt(IV) Nitrido Complex and its N-Migratory Insertion Product. J Am Chem Soc 2014; 136:15072-8. [DOI: 10.1021/ja508144j] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Eva M. Zolnhofer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen - Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Martina Käß
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen - Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Marat M. Khusniyarov
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen - Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Frank W. Heinemann
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen - Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Laurent Maron
- Université de Toulouse et CNRS, NSA, UPS, CNRS, UMR 5215 LPCNO, 135 avenue de Rangueil, 31077 Toulouse, France
| | - Maurice van Gastel
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34−36, 45470 Mülheim, Germany
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34−36, 45470 Mülheim, Germany
| | - Karsten Meyer
- Department
of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen - Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
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