51
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Paquette MM, Plaul D, Kurimoto A, Patrick BO, Frank NL. Opto-Spintronics: Photoisomerization-Induced Spin State Switching at 300 K in Photochrome Cobalt-Dioxolene Thin Films. J Am Chem Soc 2018; 140:14990-15000. [PMID: 30351017 DOI: 10.1021/jacs.8b09190] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Controllable quantum systems are under active investigation for quantum computing, secure information processing, and nonvolatile memory. The optical manipulation of spin quantum states provides an important strategy for quantum control with both temporal and spatial resolution. Challenges in increasing the lifetime of photoinduced magnetic states at T > 200 K have hindered progress toward utilizing photomagnetic materials in quantum device architectures. Here we demonstrate reversible light-induced magnetization switching in an organic thin film at device operating temperatures of 300-330 K. By utilizing photochromic ligands that undergo structural changes in the solid state, the changes in ligand field associated with photoisomerization modulate the ligand field and in turn the oxidation and spin state of a bound metal center. Green light irradiation (λexc = 550 nm) of a spirooxazine cobalt-dioxolene complex induces photoisomerization of the ligand that in turn triggers a reversible intramolecular charge-transfer coupled spin-transition process at the cobalt center. The generation of photomagnetic states through conversion between a low-spin Co(III)-semiquinone doublet and a high-spin Co(II)-bis-semiquinone sextet state has been demonstrated in both solution and the solid state and is described as a photoisomerization-induced spin-charge excited state (PISCES) process. The high transition temperature (325 K) and long-lived photoinduced state (τ = 10 s at 300 K) are dictated by the photochromic ligand. Theory provides effective modeling of the phenomenon and long-term strategies to further modulate the lifetimes of photomagnetic states for quantum information technologies at the single molecule level.
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Affiliation(s)
- Michelle M Paquette
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Daniel Plaul
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Aiko Kurimoto
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
| | - Brian O Patrick
- Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Natia L Frank
- Department of Chemistry , University of Victoria , PO Box 1700 STN CSC , Victoria , British Columbia V8W 2Y2 , Canada
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52
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Li B, Wang XN, Kirchon A, Qin JS, Pang JD, Zhuang GL, Zhou HC. Sophisticated Construction of Electronically Labile Materials: A Neutral, Radical-Rich, Cobalt Valence Tautomeric Triangle. J Am Chem Soc 2018; 140:14581-14585. [DOI: 10.1021/jacs.8b09062] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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
| | - Xiao-Ning Wang
- 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
| | - Jun-Sheng Qin
- 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
| | - 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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53
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Shiga T, Kumamaru R, Newton GN, Oshio H. Cobalt complexes with redox-active anthraquinone-type ligands. Dalton Trans 2018; 47:7804-7811. [PMID: 29850706 DOI: 10.1039/c8dt00586a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three anthraquinone-type multidentate ligands, HL1-3 (HL = 2-R-1H-anthra[1,2-d]imidazole-6,11-dione; HL1: R = (2-pyridyl), HL2; R = (4,6-dimethyl-2-pyridyl), HL3; R = (6-methoxy-2-pyridyl)), were prepared, and their complexation behaviour was investigated. Three bis-chelate cobalt complexes with the formula [CoII(L1-3)2]·n(solv.) (1, 2, and 3 for HL1, HL2, and HL3, respectively), in which the ligands adopted tridentate binding modes, were synthesized and structurally characterized by single-crystal X-ray analyses. Electrochemical studies of 1-3 in CH2Cl2 reveal three reversible redox waves, assigned to ligand and cobalt-centred processes. Additional complexes were obtained in which HL1 adopted a bidentate binding mode, stabilising the mono-chelate [CoII(HL1)(NO3)2(DMF)2] (4) species and tris-chelate [CoIII(L1)3] (5) complex in which the cobalt ion was in its 3+ state. The electrochemical properties of complex 5 were investigated in DMF, and the Co(ii)/Co(iii) redox couple was found to be negatively shifted compared to that of complex 1, while the ligand-based processes became irreversible. Tridentate chelation is found to stabilise the anthraquinone ligands and unlocks their redox multi-stability.
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Affiliation(s)
- Takuya Shiga
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8571, Japan.
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54
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Schmidt HC, Larsen CB, Wenger OS. Electron Transfer around a Molecular Corner. Angew Chem Int Ed Engl 2018; 57:6696-6700. [DOI: 10.1002/anie.201800396] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/02/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Hauke C. Schmidt
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
| | - Christopher B. Larsen
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
| | - Oliver S. Wenger
- Department of ChemistryUniversity of Basel St. Johanns-Ring 19 4056 Basel Switzerland
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55
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Jana NC, Brandão P, Mathonière C, Panja A. Synthesis, structure and magnetic properties of dinuclear cobalt-tetraoxolene complexes with bidentate terminal ligands. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.12.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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56
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Affiliation(s)
- Hauke C. Schmidt
- Departement ChemieUniversität Basel St. Johanns-Ring 19 4056 Basel Schweiz
| | | | - Oliver S. Wenger
- Departement ChemieUniversität Basel St. Johanns-Ring 19 4056 Basel Schweiz
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57
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Mondal D, Majee MC, Kundu S, Mörtel M, Abbas G, Endo A, Khusniyarov MM, Chaudhury M. Dinuclear Iron(III) and Cobalt(III) Complexes Featuring a Biradical Bridge: Their Molecular Structures and Magnetic, Spectroscopic, and Redox Properties. Inorg Chem 2018; 57:1004-1016. [DOI: 10.1021/acs.inorgchem.7b02340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dhrubajyoti Mondal
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Mithun Chandra Majee
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Sanchita Kundu
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Max Mörtel
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Ghulam Abbas
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Akira Endo
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1
Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Marat M. Khusniyarov
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstrasse
1, 91058 Erlangen, Germany
| | - Muktimoy Chaudhury
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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58
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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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59
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A DFT computational study of the magnetic behaviour of cobalt dioxolene complexes of tetraazamacrocyclic ligands. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2017.12.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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60
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Trifonov AA, Mahrova TV, Luconi L, Giambastiani G, Lyubov DM, Cherkasov AV, Sorace L, Louyriac E, Maron L, Lyssenko KA. Steric control in the metal–ligand electron transfer of iminopyridine–ytterbocene complexes. Dalton Trans 2018; 47:1566-1576. [DOI: 10.1039/c7dt04299j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A systematic study of reactions between Cp*2Yb(THF) and iminopyridine ligands featuring similar electron accepting properties but variable denticity and steric demand, has provided a new example of steric control on the redox chemistry of ytterbocenes.
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Affiliation(s)
- Alexander A. Trifonov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russia
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
| | - Tatyana V. Mahrova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russia
| | - Lapo Luconi
- Istituto di ChimicadeiCompostiOrganometallici (ICCOM - CNR)
- Sesto Fiorentino
- Italy
| | - Giuliano Giambastiani
- Istituto di ChimicadeiCompostiOrganometallici (ICCOM - CNR)
- Sesto Fiorentino
- Italy
- Kazan Federal University
- 420008 Kazan
| | - Dmitry M. Lyubov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russia
| | - Anton V. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russia
| | - Lorenzo Sorace
- Dipartimento di Chimica “U. Schiff” and UdR INSTM
- Università di Firenze
- 50019 Sesto Fiorentino
- Italy
| | | | - Laurent Maron
- Université de Toulouse
- INSA
- UPS
- CNRS-UMR5215
- 31077 Toulouse
| | - Konstantin A. Lyssenko
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
- Russia
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61
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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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62
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Jana NC, Brandão P, Saha A, Panja A. Synthesis, crystal structure and electronic property of a tetraoxolene bridged dinuclear cobalt(II) complex with bipyridyl blocking ligand. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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63
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Starikova AA, Starikov АG, Minkin VI. Dinuclear adducts of di-o-iminoquinone ligands with Co II diketonates: computational insights into two-step valence tautomeric rearrangements. J Mol Model 2017; 23:307. [PMID: 28993951 DOI: 10.1007/s00894-017-3477-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 09/18/2017] [Indexed: 11/24/2022]
Abstract
Density functional theory (DFT) computational modeling [B3LYP*/6-311++G(d,p)] of a series of potentially valence tautomeric (VT) dinuclear 2:1 adducts of CoII bis-acetylacetonate, bis-trifluoroacetylacetonate and bis-hexafluoroacetylacetonate with redox-active tetradentate di-o-iminoquinone ligands has been performed. The significant energy preference of the low-spin electromeric forms of the complexes on the basis of CoII bis-acetylacetonate points to a low probability of VT in these compounds. Electron-withdrawing CF3-groups in the diketonate moiety of the mixed-ligand complexes promote narrowing of the energy gaps between the electronic states, which allows one-step VT rearrangements to be expected in the adducts of CoII bis-trifluoromethylacetylacetonate. The most suitable energy parameters for the occurrence of two-step VT conversion (stability of the adduct with respect to dissociation into the components, small relative energies of electromeric forms and thermally achievable energy barriers to intramolecular electron transfers estimated as minimum energy crossing points) are found for the adduct of di-o-iminoquinone with CoII bis-trifluoroacetylacetonates comprising a diphenylene linker.
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Affiliation(s)
- A A Starikova
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090.
| | - А G Starikov
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
- Southern Scientific Center, Russian Academy of Sciences, st. Chehova 41, Rostov-on-Don, Russian Federation, 344006
| | - V I Minkin
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachka Avenue 194/2, Rostov-on-Don, Russian Federation, 344090
- Southern Scientific Center, Russian Academy of Sciences, st. Chehova 41, Rostov-on-Don, Russian Federation, 344006
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64
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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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65
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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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66
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Katayama K, Hirotsu M, Ito A, Teki Y. Fluorescence behaviour of an anthracene-BODIPY system affected by spin states of a dioxolene-cobalt centre. Dalton Trans 2016; 45:10165-72. [PMID: 27075418 DOI: 10.1039/c6dt00864j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dioxolene cobalt complexes, [Co(L)(TPA)]PF6 () and [Co(L)(Me3TPA)]PF6 (), were synthesized using a catechol with anthracene and boron-dipyrromethene (BODIPY), H2L, and tris(pyridin-2-ylmethyl)amine (TPA) or tris[(6-methylpyridin-2-yl)methyl]amine (Me3TPA) and characterised by UV-vis absorption, IR and NMR spectroscopy. Complexes and are a low-spin cobalt(iii) catecholate form and a high-spin cobalt(ii) semiquinonate form, respectively, in CH3CN at room temperature. The effect of the spin states of the dioxolene-cobalt centre on fluorescence was investigated in CH3CN at room temperature. The fluorescence intensity of was clearly lower than that of , although both complexes showed weaker fluorescence compared with that of H2L. The difference in the intensity between and is mainly due to the enhancement of nonradiative decay processes based on the stronger metal-ligand interactions for the cobalt(iii) catecholate form of compared with the cobalt(ii) semiquinonate form of .
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Affiliation(s)
- Koichi Katayama
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Masakazu Hirotsu
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Akitaka Ito
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Yoshio Teki
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
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67
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Wiesner S, Wagner A, Kaifer E, Himmel HJ. A Valence Tautomeric Dinuclear Copper Tetrakisguanidine Complex. Chemistry 2016; 22:10438-45. [DOI: 10.1002/chem.201601169] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/18/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Sven Wiesner
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Arne Wagner
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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68
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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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69
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Koo JY, Yakiyama Y, Lee GR, Lee J, Choi HC, Morita Y, Kawano M. Selective Formation of Conductive Network by Radical-Induced Oxidation. J Am Chem Soc 2016; 138:1776-9. [DOI: 10.1021/jacs.5b12355] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jin Young Koo
- The
Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
| | - Yumi Yakiyama
- The
Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
| | - Gil Ryeong Lee
- The
Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
| | - Jinho Lee
- Department
of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
| | - Hee Cheul Choi
- Center
for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), 77 Cheongam-ro, Pohang 790-784, Korea
- Department
of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
| | - Yasushi Morita
- Department
of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Yachigusa 1247, Yakusa, Toyota 470-0392, Japan
| | - Masaki Kawano
- The
Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Namgu, Pohang 790-784, Korea
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70
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Eberle B, Damjanović M, Enders M, Leingang S, Pfisterer J, Krämer C, Hübner O, Kaifer E, Himmel HJ. Radical Monocationic Guanidino-Functionalized Aromatic Compounds (GFAs) as Bridging Ligands in Dinuclear Metal Acetate Complexes: Synthesis, Electronic Structure, and Magnetic Coupling. Inorg Chem 2016; 55:1683-96. [DOI: 10.1021/acs.inorgchem.5b02614] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Benjamin Eberle
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Marko Damjanović
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Markus Enders
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Simone Leingang
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Jessica Pfisterer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Christoph Krämer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Olaf Hübner
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Elisabeth Kaifer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hans-Jörg Himmel
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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71
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Binuclear bis(o-semiquinonato)cobalt(II) complexes with bridging tetradentate N-donor ligand. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.10.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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72
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Glavinović M, Qi F, Katsenis AD, Friščić T, Lumb JP. Redox-promoted associative assembly of metal-organic materials. Chem Sci 2016; 7:707-712. [PMID: 28791114 PMCID: PMC5530005 DOI: 10.1039/c5sc02214b] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 10/08/2015] [Indexed: 11/30/2022] Open
Abstract
We develop an associative synthesis of metal-organic materials that combines solid-state metal oxidation and coordination-driven self-assembly into a one-step, waste-free transformation. The methodology hinges on the unique reactivity of ortho-quinones, which we introduce as versatile oxidants for mechanochemical synthesis. Our strategy opens a previously unexplored route to paramagnetic metal-organic materials from elementary metals.
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Affiliation(s)
- Martin Glavinović
- Department of Chemistry , McGill University , 801 Sherbrooke St. West Montreal , Quebec H3A 0B8 , Canada . ; ; ; Tel: +514-398-4889
| | - Feng Qi
- Department of Chemistry , McGill University , 801 Sherbrooke St. West Montreal , Quebec H3A 0B8 , Canada . ; ; ; Tel: +514-398-4889
| | - Athanassios D Katsenis
- Department of Chemistry , McGill University , 801 Sherbrooke St. West Montreal , Quebec H3A 0B8 , Canada . ; ; ; Tel: +514-398-4889
| | - Tomislav Friščić
- Department of Chemistry , McGill University , 801 Sherbrooke St. West Montreal , Quebec H3A 0B8 , Canada . ; ; ; Tel: +514-398-4889
| | - Jean-Philip Lumb
- Department of Chemistry , McGill University , 801 Sherbrooke St. West Montreal , Quebec H3A 0B8 , Canada . ; ; ; Tel: +514-398-4889
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73
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Gong T, Yang X, Sui Q, Qi Y, Xi FG, Gao EQ. Magnetic and Photochromic Properties of a Manganese(II) Metal-Zwitterionic Coordination Polymer. Inorg Chem 2015; 55:96-103. [DOI: 10.1021/acs.inorgchem.5b01888] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Teng Gong
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Xiao Yang
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Qi Sui
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Yan Qi
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Fu-Gui Xi
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - En-Qing Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical
Processes, College of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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74
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Loughrey JJ, Patmore NJ, Baldansuren A, Fielding AJ, McInnes EJL, Hardie MJ, Sproules S, Halcrow MA. Platinum(ii) complexes of mixed-valent radicals derived from cyclotricatechylene, a macrocyclic tris-dioxolene. Chem Sci 2015; 6:6935-6948. [PMID: 29861932 PMCID: PMC5951140 DOI: 10.1039/c5sc02776d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 08/18/2015] [Indexed: 01/10/2023] Open
Abstract
Three complexes of cyclotricatechylene (H6ctc), [{PtL}3(μ3-ctc)], have been synthesised: (L = 1,2-bis(diphenylphosphino)benzene {dppb}, 1; L = 1,2-bis(diphenylphosphino)ethane {dppe}, 2; L = 4,4'-bis(tert-butyl)-2,2'-bipyridyl { t Bu2bipy}, 3). The complexes show three low-potential, chemically reversible voltammetric oxidations separated by ca. 180 mV, corresponding to stepwise oxidation of the [ctc]6- catecholato rings to the semiquinonate level. The redox series [1]0/1+/2+/3+ and [3]0/1+/2+/3+ have been characterised by UV/vis/NIR spectroelectrochemistry. The mono- and di-cations have class II mixed valent character, with reduced radical delocalisation compared to an analogous bis-dioxolene system. The SOMO composition of [1˙]+ and [3˙]+ has been delineated by cw EPR, ENDOR and HYSCORE spectroscopies, with the aid of two monometallic model compounds [PtL(DBsq˙)]+ (DBsqH = 3,5-bis(tert-butyl)-1,2-benzosemiquinone; L = dppe or t Bu2bipy). DF and time-dependent DF calculations confirm these interpretations, and demonstrate changes to spin-delocalisation in the ctc macrocycle as it is sequentially oxidised.
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Affiliation(s)
- Jonathan J Loughrey
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK .
| | - Nathan J Patmore
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , UK
| | - Amgalanbaatar Baldansuren
- School of Chemistry and Photon Science Institute , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - Alistair J Fielding
- School of Chemistry and Photon Science Institute , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - Eric J L McInnes
- School of Chemistry and Photon Science Institute , University of Manchester , Oxford Road , Manchester M13 9PL , UK
| | - Michaele J Hardie
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK .
| | - Stephen Sproules
- WestCHEM , School of Chemistry , University of Glasgow , Glasgow G12 8QQ , UK .
| | - Malcolm A Halcrow
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK .
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75
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Madadi A, Itazaki M, Gable RW, Moubaraki B, Murray KS, Boskovic C. Electronic Lability in a Dinuclear Cobalt–Bis(dioxolene) Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500980] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Azadeh Madadi
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia, http://www.chemistry.unimelb.edu.au/dr‐colette‐boskovic
| | - Masumi Itazaki
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia, http://www.chemistry.unimelb.edu.au/dr‐colette‐boskovic
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi‐ku, Osaka 558‐8585, Japan
| | - Robert W. Gable
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia, http://www.chemistry.unimelb.edu.au/dr‐colette‐boskovic
| | - Boujemaa Moubaraki
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Keith S. Murray
- School of Chemistry, Monash University, Clayton, Victoria, 3800, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia, http://www.chemistry.unimelb.edu.au/dr‐colette‐boskovic
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76
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Cai LZ, Chen QS, Zhang CJ, Li PX, Wang MS, Guo GC. Photochromism and Photomagnetism of a 3d–4f Hexacyanoferrate at Room Temperature. J Am Chem Soc 2015; 137:10882-5. [DOI: 10.1021/jacs.5b05320] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Li-Zhen Cai
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Qing-Song Chen
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Cui-Juan Zhang
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Pei-Xin Li
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Ming-Sheng Wang
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Guo-Cong Guo
- State Key Laboratory of Structural
Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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77
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Guardingo M, Busqué F, Novio F, Ruiz-Molina D. Design and Synthesis of a Noninnocent Multitopic Catechol and Pyridine Mixed Ligand: Nanoscale Polymers and Valence Tautomerism. Inorg Chem 2015; 54:6776-81. [DOI: 10.1021/acs.inorgchem.5b00598] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mireia Guardingo
- ICN2-Institut Català de Nanociència i Nanotecnologia, ICN2 Building, Campus UAB, 08193-Bellaterra, Spain
- CSIC-Consejo Superior de Investigaciones Científicas, ICN2 Building, Campus UAB 08193-Bellaterra, Spain
| | - Felix Busqué
- Chemistry Department, Universitat Autònoma de Barcelona, Campus UAB, 08193-Bellaterra, Spain
| | - Fernando Novio
- ICN2-Institut Català de Nanociència i Nanotecnologia, ICN2 Building, Campus UAB, 08193-Bellaterra, Spain
- CSIC-Consejo Superior de Investigaciones Científicas, ICN2 Building, Campus UAB 08193-Bellaterra, Spain
| | - Daniel Ruiz-Molina
- ICN2-Institut Català de Nanociència i Nanotecnologia, ICN2 Building, Campus UAB, 08193-Bellaterra, Spain
- CSIC-Consejo Superior de Investigaciones Científicas, ICN2 Building, Campus UAB 08193-Bellaterra, Spain
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78
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Piskunov AV, Ershova IV, Bogomyakov AS, Starikov AG, Fukin GK, Cherkasov VK. Indirect Magnetic Exchange between o-Iminosemiquinonate Ligands Controlled by Apical Substituent in Pentacoordinated Gallium(III) Complexes. Inorg Chem 2015; 54:6090-9. [DOI: 10.1021/acs.inorgchem.5b00520] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
| | - Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a Institutskaya str., 630090 Novosibirsk, Russian Federation
| | - Andrey G. Starikov
- Southern Scientific Center of Russian Academy of Sciences, 41 Chehova Ave., 344006 Rostov on Don, Russian Federation
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
| | - Vladimir K. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
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79
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Poneti G, Poggini L, Mannini M, Cortigiani B, Sorace L, Otero E, Sainctavit P, Magnani A, Sessoli R, Dei A. Thermal and optical control of electronic states in a single layer of switchable paramagnetic molecules. Chem Sci 2015; 6:2268-2274. [PMID: 29308140 PMCID: PMC5645729 DOI: 10.1039/c5sc00163c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 02/12/2015] [Indexed: 11/21/2022] Open
Abstract
The control of the charge distribution in a monolayer of switchable cobalt-dioxolene complexes undergoing Valence Tautomerism (VT) has been achieved by means of thermal and optical stimuli. Thiol-derivatised VT molecules have been grafted on polycrystalline gold surface as monolayers from solution. X-ray photoelectron spectroscopy and time-of-flight secondary ions mass spectrometry evidenced the formation of a covalent bond between intact VT molecules and the surface and excluded the presence of physisorbed molecules. X-ray absorption spectroscopy revealed that the temperature- and light-induced conversion profiles of the monolayer closely reproduce the ones found for the crystalline phase. This study demonstrates that a wet chemistry based approach allows to transfer switchable paramagnetic molecules at the nanoscale, widening the playground to develop new hybrid molecular based architectures for novel technologies.
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Affiliation(s)
- Giordano Poneti
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
- "Guglielmo Marconi" University , Department of Applied Science and Technology , via Plinio 44 , 00193 Roma , Italy
| | - Lorenzo Poggini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Matteo Mannini
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Brunetto Cortigiani
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Lorenzo Sorace
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Edwige Otero
- Synchrotron SOLEIL , BP 48 91192 Gif-Sur-Yvette , France
| | - Philippe Sainctavit
- Institut de Minéralogie , de Physique des Matériaux et de Cosmochimie , UMR7590 CNRS , Université Pierre et Marie Curie (Paris 6) , 4 place Jussieu , 75252 Paris , France
| | - Agnese Magnani
- University of Siena , Department of Biotechnologies , Chemistry and Pharmacy , INSTM Research Unit of Siena , Via A. Moro 2 , 53100 Siena , Italy
| | - Roberta Sessoli
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
| | - Andrea Dei
- University of Florence , Department of Chemistry "Ugo Schiff" and INSTM Research Unit of Florence , via della Lastruccia 3-13 , 50019 Sesto Fiorentino , Italy . ; ; ; Tel: +39 055 4573269
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80
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Yu F, Xiang M, Wu QG, He H, Cheng SQ, Cai XY, Li AH, Zhang YM, Li B. Valence tautomerism and photodynamics observed in a dinuclear cobalt-tetraoxolene compound. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.11.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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81
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82
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Minkin VI, Starikov AG, Starikova AA. Theoretical modeling of valence tautomeric dinuclear cobalt complexes. Adducts of CoII diketonates with cyclic redox-active tetraone ligands. Dalton Trans 2015; 44:17819-28. [DOI: 10.1039/c5dt02609a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
B3LYP*/6-311++G(d,p) calculated two-step VT rearrangement of a Co(ii) diketonate and a pyrene-4,5,9,10-tetraone 2 : 1 adduct occurs with the migration of paramagnetic centers.
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Affiliation(s)
- V. I. Minkin
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russian Federation
- Southern Scientific Center of the Russian Academy of Sciences
- Rostov-on-Don
| | - A. G. Starikov
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russian Federation
- Southern Scientific Center of the Russian Academy of Sciences
- Rostov-on-Don
| | - A. A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russian Federation
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83
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Minkin VI, Starikova AA, Starikov AG. Valence tautomeric dinuclear adducts of Co(ii) diketonates with redox-active diquinones for the design of spin qubits: computational modeling. Dalton Trans 2015; 44:1982-91. [DOI: 10.1039/c4dt03053b] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations performed on dinuclear adducts of Co(ii) diketonates with redox-active diquinones showed that with the proper structural tuning of the ligands, these paramagnetic complexes possess the properties required in a 2-qubit molecular system.
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Affiliation(s)
- Vladimir I. Minkin
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov on Don
- Russian Federation
- Southern Scientific Center of the Russian Academy of Sciences
- Rostov on Don
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov on Don
- Russian Federation
| | - Andrey G. Starikov
- Southern Scientific Center of the Russian Academy of Sciences
- Rostov on Don
- Russian Federation
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84
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Chen XY, Wei RJ, Zheng LS, Tao J. Valence Tautomeric Transitions of Three One-Dimensional Cobalt Complexes. Inorg Chem 2014; 53:13212-9. [DOI: 10.1021/ic502471v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiang-Yi Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces
and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Rong-Jia Wei
- State Key Laboratory of Physical Chemistry of Solid Surfaces
and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Lan-Sun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces
and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
| | - Jun Tao
- State Key Laboratory of Physical Chemistry of Solid Surfaces
and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
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85
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Katayama K, Hirotsu M, Kinoshita I, Teki Y. Synthesis, magnetic properties and dynamic behavior of cobalt complexes with an anthracene-containing dioxolene ligand. Dalton Trans 2014; 43:13384-91. [DOI: 10.1039/c4dt01574f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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86
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Valence tautomerism in metal complexes: Stimulated and reversible intramolecular electron transfer between metal centers and organic ligands. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.01.014] [Citation(s) in RCA: 314] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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87
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Loughrey JJ, Sproules S, McInnes EJL, Hardie MJ, Halcrow MA. Stable mixed-valent radicals from platinum(II) complexes of a bis(dioxolene) ligand. Chemistry 2014; 20:6272-6. [PMID: 24488824 PMCID: PMC4164269 DOI: 10.1002/chem.201304848] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Indexed: 11/13/2022]
Abstract
Three diplatinum(II) complexes [{PtL}2(μ-thea)] (H4thea=2,3,6,7-tetrahydroxy-9,10-dimethyl-9,10-dihydro-9,10-ethanoanthracene) have been prepared, with diphosphine or bipyridyl “L” co-ligands. One-electron oxidation of these complexes gave radical cations containing a mixed-valent [thea]3− ligand with discrete catecholate and semiquinonate centers separated by quaternary methylene spacers. The electronic character of these radicals is near the Robin–Day class II/III border determined by UV/Vis/NIR and EPR spectroscopies. Crystal-structure determinations and a DFT calculation imply that oxidation of the thea4− ligand may lead to an increased through-space interaction between the dioxolene π systems.
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Affiliation(s)
- Jonathan J Loughrey
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT (UK), Fax: (+44) 113-343-6565; Current address: Department of Chemistry and Biochemistry, University of Arizona, P.O. Box 210041, 1306 East University Blvd., Tucson, AZ 85721-0041 (USA)
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88
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Mulyana Y, Alley KG, Davies KM, Abrahams BF, Moubaraki B, Murray KS, Boskovic C. Dinuclear cobalt(ii) and cobalt(iii) complexes of bis-bidentate napthoquinone ligands. Dalton Trans 2014; 43:2499-511. [DOI: 10.1039/c3dt52811a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Seven dinuclear cobalt complexes with bridging bis-bidentate naphthoquinone ligands reveal the steric influence of the ancillary capping ligand on the redox potential of the cobalt centres, with metal-catalysed derivatisation of the bridging ligand also observed.
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Affiliation(s)
- Yanyan Mulyana
- School of Chemistry
- University of Melbourne
- Melbourne, Australia
| | - Kerwyn G. Alley
- School of Chemistry
- University of Melbourne
- Melbourne, Australia
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89
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Qi ZK, Zhang FQ, Yao RX, Liu JL, Zhang XM. Mixed CoN4Cl2 and CoCl4 units versus two CoN2Cl3 units in [Co2(Htbi)2Cl4] isomers. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2013.10.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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90
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de Victoria Rodríguez M, Brunet E, Nocchetti M, Presciutti F, Costantino F. Redox properties of LDH microcrystals coated with a catechol-bearing phosphonate derived from dopamine. RSC Adv 2014. [DOI: 10.1039/c4ra03660c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The surface of Zn–Al-chloride LDH microcrystals (LDH = Layered Double Hydroxides) was activated by grafting a redox active catechol bearing bis-phosphonate obtained by dopamine derivatization.
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Affiliation(s)
| | - Ernesto Brunet
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad Autónoma de Madrid
- 28049 Madrid, Spain
| | - Morena Nocchetti
- Dipartimento di Scienze Farmaceutiche
- University of Perugia
- Perugia, Italy
| | - Federica Presciutti
- Dipartimento di Chimica
- Biologia e Biotecnologie
- University of Perugia
- Perugia, Italy
| | - Ferdinando Costantino
- Dipartimento di Chimica
- Biologia e Biotecnologie
- University of Perugia
- Perugia, Italy
- CNR – ICCOM
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91
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Miller RG, Narayanaswamy S, Tallon JL, Brooker S. Spin crossover with thermal hysteresis in cobalt(ii) complexes and the importance of scan rate. NEW J CHEM 2014. [DOI: 10.1039/c3nj01451g] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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92
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Poneti G, Mannini M, Cortigiani B, Poggini L, Sorace L, Otero E, Sainctavit P, Sessoli R, Dei A. Magnetic and spectroscopic investigation of thermally and optically driven valence tautomerism in thioether-bridged dinuclear cobalt-dioxolene complexes. Inorg Chem 2013; 52:11798-805. [PMID: 24090074 DOI: 10.1021/ic4011949] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of dinuclear cobalt complexes of general formula [Co(Mentpa)(diox-S-diox)Co(Mentpa)](PF6)2·MeOH (n = 0, 2, 3) was prepared through the synthesis of the bis-bidentate ligand 6,6'-((1,4-phenylenebis(methylene))bis(sulfanediyl))bis(3,5-di-tert-butyl-benzene-1,2-diol) (diox-S-diox). The ancillary ligands Mentpa are obtained by the tripodal tris(2-pyridylmethyl)amine (tpa) ligand through successive introduction of methyl groups into the 6 position of the pyridine moieties. As expected, the steric hindrance induced by this substitution modulates the redox properties of the metal acceptor, determining the charge distribution of the metal-dioxolene adduct at room temperature. Magnetic measurements and X-ray photoelectron and X-ray absorption spectroscopies indicate that the charge distributions low-spin-Co(III)-catecholate and high-spin-Co(II)-semiquinonate characterize the complexes formed by the tpa and Me3tpa tetradentate ligands, respectively. The complex formed by the Me2tpa ligand undergoes a thermal- and light-induced interconversion of the two states, in agreement with the existence of a valence tautomeric equilibrium. All complexes were stable and behaved reproducibly under X-ray irradiation. This work points out a fast and simple chemical approach to structurally and electronically modify the catechol ring while leaving its coordination capabilities unaffected. These findings afford a robust chemical method to prepare sulfur-functionalized dioxolene ligands as new molecular bricks for chemical functionalization of noble metal surfaces with this class of molecular switches.
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Affiliation(s)
- Giordano Poneti
- Laboratory of Molecular Magnetism (LaMM), Dipartimento di Chimica 'Ugo Schiff', Università degli Studi di Firenze & INSTM RU of Firenze , via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
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