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Janetzki JT, Chegerev MG, Gransbury GK, Gable RW, Clegg JK, Mulder RJ, Jameson GNL, Starikova AA, Boskovic C. Controlling Spin Crossover in a Family of Dinuclear Fe(III) Complexes via the Bis(catecholate) Bridging Ligand. Inorg Chem 2023; 62:15719-15735. [PMID: 37691232 DOI: 10.1021/acs.inorgchem.3c02598] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Spin crossover (SCO) complexes can reversibly switch between low spin (LS) and high spin (HS) states, affording possible applications in sensing, displays, and molecular electronics. Dinuclear SCO complexes with access to [LS-LS], [LS-HS], and [HS-HS] states may offer increased levels of functionality. The nature of the SCO interconversion in dinuclear complexes is influenced by the local electronic environment. We report the synthesis and characterization of [{FeIII(tpa)}2spiro](PF6)2 (1), [{FeIII(tpa)}2Br4spiro](PF6)2 (2), and [{FeIII(tpa)}2thea](PF6)2 (3) (tpa = tris(2-pyridylmethyl)amine, spiroH4 = 3,3,3',3'-tetramethyl-1,1'-spirobi(indan)-5,5',6,6'-tetraol, Br4spiroH4 = 3,3,3',3'-tetramethyl-1,1'-spirobi(indan)-4,4',7,7'-tetrabromo-5,5',6,6'-tetraol, theaH4 = 2,3,6,7-tetrahydroxy-9,10-dimethyl-9,10-dihydro-9,10-ethanoanthracene), utilizing non-conjugated bis(catecholate) bridging ligands. In the solid state, magnetic and structural analysis shows that 1 remains in the [HS-HS] state, while 2 and 3 undergo a partial SCO interconversion upon cooling from room temperature involving the mixed [LS-HS] state. In solution, all complexes undergo SCO from [HS-HS] at room temperature, via [LS-HS] to mixtures including [LS-LS] at 77 K, with the extent of SCO increasing in the order 1 < 2 < 3. Gas phase density functional theory calculations suggest a [LS-LS] ground state for all complexes, with the [LS-HS] and [HS-HS] states successively destabilized. The relative energy separations indicate that ligand field strength increases following spiro4- < Br4spiro4- < thea4-, consistent with solid-state magnetic and EPR behavior. All three complexes show stabilization of the [LS-HS] state in relation to the midpoint energy between [LS-LS] and [HS-HS]. The relative stability of the [LS-HS] state increases with increasing ligand field strength of the bis(catecholate) bridging ligand in the order 1 < 2 < 3. The bromo substituents of Br4spiro4- increase the ligand field strength relative to spiro4-, while the stronger ligand field provided by thea4- arises from extension of the overlapping π-orbital system across the two catecholate units. This study highlights how SCO behavior in dinuclear complexes can be modulated by the bridging ligand, providing useful insights for the design of molecules that can be interconverted between more than two states.
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Affiliation(s)
- Jett T Janetzki
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Maxim G Chegerev
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Gemma K Gransbury
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
| | - Robert W Gable
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Jack K Clegg
- University of Queensland, St Lucia, Queensland 4072, Australia
| | | | - Guy N L Jameson
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Alyona A Starikova
- Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
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2
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Chegerev M, Demidov O, Vasilyev P, Efimov N, Kubrin S, Starikov A, Vlasenko V, Piskunov A, Shapovalova S, Guda A, Rusalev Y, Soldatov A. Spin transitions in ferric catecholate complexes mediated by outer-sphere counteranions. Dalton Trans 2022; 51:10909-10919. [PMID: 35792083 DOI: 10.1039/d2dt01207c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A family of ionic ferric catecholate complexes 1-4 bearing a disubstituted 3,6-di-tert-butyl-catecholate ligand (3,6-DBCatH2) and tetradentate tris(2-pyridylmethyl)amine (TPA) was prepared and its spin transitions were investigated. Variation of the outer-sphere counteranions (PF6, BPh4, ClO4, BF4) is accompanied by changes in the magnetic behavior of the compounds under consideration. The crystal structures of complexes 1, 3 and 4 were determined by single crystal X-ray diffraction analysis at 100 K and 293 K. The complexes were characterized by the occurrence of a thermally induced spin-crossover process in the solid state with different degrees of completeness, which was confirmed by the comprehensive spectroscopic investigation (EPR, magnetic susceptibility, Mössbauer, and XAS) of the isolated compounds. Complex 4 containing BF4 anions was found to demonstrate valence tautomeric transition along with spin-crossover. This finding makes compound 4 the first salt-like mononuclear ferric catecholate complex exhibiting valence tautomerism.
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Affiliation(s)
- Maxim Chegerev
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachki Avenue, 194/2, 344090, Rostov-on-Don, Russia.
| | - Oleg Demidov
- North Caucasus Federal University, Pushkin st. 1, 355017, Stavropol, Russia
| | - Pavel Vasilyev
- Kurnakov Institute of General and Inorganic Chemistry, Leninsky avenue, 31, 119991, Moscow, Russia
| | - Nikolay Efimov
- Kurnakov Institute of General and Inorganic Chemistry, Leninsky avenue, 31, 119991, Moscow, Russia
| | - Stanislav Kubrin
- Institute of Physics, Southern Federal University, Stachki Ave., 194, 344090, Rostov-on-Don, Russia
| | - Andrey Starikov
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachki Avenue, 194/2, 344090, Rostov-on-Don, Russia.
| | - Valery Vlasenko
- Institute of Physics, Southern Federal University, Stachki Ave., 194, 344090, Rostov-on-Don, Russia
| | - Alexander Piskunov
- Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., GSP-445, 603950, Nizhny Novgorod, Russia
| | - Svetlana Shapovalova
- The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090, Rostov-on-Don, Russia
| | - Alexander Guda
- The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090, Rostov-on-Don, Russia
| | - Yury Rusalev
- The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090, Rostov-on-Don, Russia
| | - Alexander Soldatov
- The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, 344090, Rostov-on-Don, Russia
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Synthesis, structure, and magnetic properties of the iron(iii) iodide complex with the 3,5-di-tert-butylcatecholate ligand. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3544-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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4
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Chegerev MG, Starikova AA. A computational search for spin-crossover in bis(catecholate) diiron complexes. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113693] [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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5
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Heterospin iron complexes with dioxolenes functionalized with stable radicals: quantum chemical study. Russ Chem Bull 2022. [DOI: 10.1007/s11172-021-3347-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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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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Electronic structure and magnetic properties of pyridinophane complexes of iron with radical-bearing catecholates: a quantum chemical study. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3154-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Abstract
AbstractProccessible FePt3 alloy nanoparticles with sizes smaller than 50 nm open the avenue to novel magnetic sensor, catalytic and biomedical applications. Our research objective was to establish a highly scalable synthesis technique for production of single-crystalline FePt3 alloy nanoparticles. We have elaborated a one-pot thermal decomposition technique for the synthesis of superparamagnetic FePt3 nanoparticles (FePt3 NPs) with mean sizes of 10 nm. Subsequent tiron coating provided water solubility of the FePt3 NPs and further processibility as bidental ligands enable binding to catalyst surfaces, smart substrates or biosensors. The chemical composition, structure, morphology, magnetic, optical and crystallographic properties of the FePt3 NPs were examined using high resolution transmission electron microscopy, high-angle annular dark field-scanning transmission electron microscopy, scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy mapping, Fourier transform infrared-attenuated total reflection, X-ray powder diffraction, X-ray photoelectron spectroscopy, vibrating sample magnetometry and UV–Vis absorption spectroscopy.
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Minkin VI, Starikova AA, Chegerev MG, Starikov AG. Computer Simulation of the Structure and Magnetic Properties of Cobalt Complexes with N-Substituted Pyridinophanes and Radical-Functionalized o-Benzoquinones. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s1070328420060068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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10
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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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11
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Starikova AA, Chegerev MG, Starikov AG. Computational modeling of structure and magnetic properties of dinuclear di-o-benzoquinone iron complexes with linear polycyclic linkers. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2747-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Tanaka H, Hitaoka S, Umehara K, Yoshizawa K, Kuwata S. Mechanistic Study on Catalytic Disproportionation of Hydrazine by a Protic Pincer‐Type Iron Complex through Proton‐Coupled Electron Transfer. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901135] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hiromasa Tanaka
- School of Liberal Arts and Sciences Daido University Minami-ku Nagoya 457‐8530 Japan
| | - Seiji Hitaoka
- Institute of Materials Chemistry and Engineering Kyushu University Nishi-ku Fukuoka 819‐0395 Japan
| | - Kazuki Umehara
- Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2‐12‐1 E4‐1 O‐Okayama Meguro‐ku Tokyo 152‐8552 Japan
| | - Kazunari Yoshizawa
- Institute of Materials Chemistry and Engineering Kyushu University Nishi-ku Fukuoka 819‐0395 Japan
| | - Shigeki Kuwata
- Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2‐12‐1 E4‐1 O‐Okayama Meguro‐ku Tokyo 152‐8552 Japan
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13
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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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14
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Starikova AA, Metelitsa EA, Starikov AG. Electronic Structure and Magnetic Properties of o-Benzoquinone Iron Complexes with Tetraazamacrocyclic Ligands. J STRUCT CHEM+ 2019. [DOI: 10.1134/s002247661908002x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Tezgerevska T, Rousset E, Gable RW, Jameson GNL, Sañudo EC, Starikova A, Boskovic C. Valence tautomerism and spin crossover in pyridinophane–cobalt–dioxolene complexes: an experimental and computational study. Dalton Trans 2019; 48:11674-11689. [DOI: 10.1039/c9dt02372k] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Variation of alkyl substituents on pyridinophane ancillary ligands governs temperature-dependent valence tautomeric or spin crossover equilibria in a family of cobalt–dioxolene complexes.
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Affiliation(s)
| | - Elodie Rousset
- School of Chemistry
- University of Melbourne
- Melbourne
- Australia
| | - Robert W. Gable
- School of Chemistry
- University of Melbourne
- Melbourne
- Australia
| | | | - E. Carolina Sañudo
- Departament de Química Inorgànica i Orgànica
- Universitat de Barcelona
- 08028 Barcelona
- Spain
- Institut de Nanociència i Nanotecnologia
| | - Alyona Starikova
- Institute of Physical and Organic Chemistry
- Southern Federal University
- 344090 Rostov on Don
- Russian Federation
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16
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Starikova AA, Minkin VI. Adducts of transition metal complexes with redox-active ligands: the structure and spin-state-switching rearrangements. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4837] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Wang P, Killian MM, Saber MR, Qiu T, Yap GPA, Popescu CV, Rosenthal J, Dunbar KR, Brunold TC, Riordan CG. Electronic, Magnetic, and Redox Properties and O 2 Reactivity of Iron(II) and Nickel(II) o-Semiquinonate Complexes of a Tris(thioether) Ligand: Uncovering the Intradiol Cleaving Reactivity of an Iron(II) o-Semiquinonate Complex. Inorg Chem 2017; 56:10481-10495. [PMID: 28809555 PMCID: PMC6200398 DOI: 10.1021/acs.inorgchem.7b01491] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The iron(II) semiquinonate character within the iron(III) catecholate species has been proposed by numerous studies to account for the O2 reactivity of intradiol catechol dioxygenases, but a well-characterized iron(II) semiquinonate species that exhibits intradiol cleaving reactivity has not yet been reported. In this study, a detailed electronic structure description of the first iron(II) o-semiquinonate complex, [PhTttBu]Fe(phenSQ) [PhTttBu = phenyltris(tert-butylthiomethyl)borate; phenSQ = 9,10-phenanthrenesemiquinonate; Wang et al. Chem. Commun. 2014, 50, 5871-5873], was generated through a combination of electronic and Mössbauer spectroscopies, SQUID magnetometry, and density functional theory (DFT) calculations. [PhTttBu]Fe(phenSQ) reacts with O2 to generate an intradiol cleavage product, diphenic anhydride, in 16% yield. To assess the dependence of the intradiol reactivity on the identity of the metal ion, the nickel analogue, [PhTttBu]Ni(phenSQ), and its derivative, [PhTttBu]Ni(3,5-DBSQ) (3,5-DBSQ = 3,5-di-tert-butyl-1,2-semiquinonate), were prepared and characterized by X-ray crystallography, mass spectrometry, 1H NMR and electronic spectroscopies, and SQUID magnetometry. DFT calculations, evaluated on the basis of the experimental data, support the electronic structure descriptions of [PhTttBu]Ni(phenSQ) and [PhTttBu]Ni(3,5-DBSQ) as high-spin nickel(II) complexes with antiferromagnetically coupled semiquinonate ligands. Unlike its iron counterpart, [PhTttBu]Ni(phenSQ) decomposes slowly in an O2 atmosphere to generate 14% phenanthrenequinone with a negligible amount of diphenic anhydride. [PhTttBu]Ni(3,5-DBSQ) does not react with O2. This dramatic effect of the metal-ion identity supports the hypothesis that a metal(III) alkylperoxo species serves as an intermediate in the intradiol cleaving reactions. The redox properties of all three complexes were probed using cyclic voltammetry and differential pulse voltammetry, which indicate an inner-sphere electron-transfer mechanism for the formation of phenanthrenequinone. The lack of O2 reactivity of [PhTttBu]Ni(3,5-DBSQ) can be rationalized by the high redox potential of the metal-ligated 3,5-DBSQ/3,5-DBQ couple.
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Affiliation(s)
- Peng Wang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Michelle M. Killian
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Mohamed R. Saber
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Tian Qiu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Codrina V. Popescu
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Joel Rosenthal
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Kim R. Dunbar
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012, United States
| | - Thomas C. Brunold
- Department of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Charles G. Riordan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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18
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Scheja A, Baabe D, Menzel D, Pietzonka C, Schweyen P, Bröring M. Spin Crossover and Valence Tautomerism in Neutral Homoleptic Iron Complexes of Bis(pyridylimino)isoindolines. Chemistry 2015; 21:14196-204. [PMID: 26248693 DOI: 10.1002/chem.201501551] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Anne Scheja
- Institut für Anorganische und Analytische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig (Germany) http://www.tu‐braunschweig.de/iaac/personal/broering
| | - Dirk Baabe
- Institut für Anorganische und Analytische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig (Germany) http://www.tu‐braunschweig.de/iaac/personal/broering
| | - Dirk Menzel
- Institut für Physik der Kondensierten Materie, TU Braunschweig, Mendelssohnstraße 2‐3, 38106 Braunschweig (Germany)
| | - Clemens Pietzonka
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerweinstraße, 35032 Marburg (Germany)
| | - Peter Schweyen
- Institut für Anorganische und Analytische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig (Germany) http://www.tu‐braunschweig.de/iaac/personal/broering
| | - Martin Bröring
- Institut für Anorganische und Analytische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig (Germany) http://www.tu‐braunschweig.de/iaac/personal/broering
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Weisser F, Stevens H, Klein J, van der Meer M, Hohloch S, Sarkar B. Tailoring RuIIPyridine/Triazole Oxygenation Catalysts and Using Photoreactivity to Probe their Electronic Properties. Chemistry 2015; 21:8926-38. [DOI: 10.1002/chem.201406441] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Indexed: 12/17/2022]
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Tichnell CR, Shultz DA, Popescu CV, Sokirniy I, Boyle PD. Synthesis, Characterization, and Photophysical Studies of an Iron(III) Catecholate–Nitronylnitroxide Spin-Crossover Complex. Inorg Chem 2015; 54:4466-74. [DOI: 10.1021/acs.inorgchem.5b00298] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher R. Tichnell
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - David A. Shultz
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Codrina V. Popescu
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, New York 13346, United States
| | - Ivan Sokirniy
- Department of Chemistry, Ursinus College, Collegeville, Pennsylvania 19426, United States
| | - Paul D. Boyle
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
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Ortega-Villar N, Guerrero-Estrada AY, Piñeiro-López L, Muñoz MC, Flores-Álamo M, Moreno-Esparza R, Real JA, Ugalde-Saldívar VM. Spin Crossover Behavior in a Series of Iron(III) Alkoxide Complexes. Inorg Chem 2015; 54:3413-21. [DOI: 10.1021/ic503081x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Norma Ortega-Villar
- Facultad
de Química, Universidad Nacional Autónoma de México, Edificio
B, Av. Universidad 3000, Coyoacán, 04510 México, D.F., México
| | - Areli Yesareth Guerrero-Estrada
- Facultad
de Química, Universidad Nacional Autónoma de México, Edificio
B, Av. Universidad 3000, Coyoacán, 04510 México, D.F., México
| | - Lucía Piñeiro-López
- Institut
de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático
José Beltrán Martinez no. 2, 46980 Paterna, Valencia, Spain
| | - M. Carmen Muñoz
- Departament
de Física Aplicada, Universitat Politècnica de València, Camino
de Vera s/n, E-46022 València, Spain
| | - Marcos Flores-Álamo
- Facultad
de Química, Universidad Nacional Autónoma de México, Edificio
B, Av. Universidad 3000, Coyoacán, 04510 México, D.F., México
| | - Rafael Moreno-Esparza
- Facultad
de Química, Universidad Nacional Autónoma de México, Edificio
B, Av. Universidad 3000, Coyoacán, 04510 México, D.F., México
| | - José A. Real
- Institut
de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático
José Beltrán Martinez no. 2, 46980 Paterna, Valencia, Spain
| | - Víctor M. Ugalde-Saldívar
- Facultad
de Química, Universidad Nacional Autónoma de México, Edificio
B, Av. Universidad 3000, Coyoacán, 04510 México, D.F., México
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Lee Y, Kim S, Fei H, Kang JK, Cohen SM. Photocatalytic CO2 reduction using visible light by metal-monocatecholato species in a metal–organic framework. Chem Commun (Camb) 2015; 51:16549-52. [DOI: 10.1039/c5cc04506a] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–organic frameworks (MOFs) with isolated metal-monocatecholato groups have been synthesized via postsynthetic exchange (PSE) for CO2 reduction photocatalyst under visible light irradiation in the presence of 1-benzyl-1,4-dihydronicotinamide and triethanolamine.
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Affiliation(s)
- Yeob Lee
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
| | - Sangjun Kim
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon
- Republic of Korea
| | - Honghan Fei
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
| | - Jeung Ku Kang
- Graduate School of EEWS
- Korea Advanced Institute of Science and Technology (KAIST)
- Daejeon
- Republic of Korea
| | - Seth M. Cohen
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
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23
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A spin-crossover catecholato–iron(III) system: Synthesis, crystal structure and magnetic properties. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2014.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Bertoni R, Lorenc M, Tissot A, Boillot ML, Collet E. Femtosecond photoswitching dynamics and microsecond thermal conversion driven by laser heating in FeIII spin-crossover solids. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.05.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Jastrzebski R, Quesne MG, Weckhuysen BM, de Visser SP, Bruijnincx PCA. Experimental and computational evidence for the mechanism of intradiol catechol dioxygenation by non-heme iron(III) complexes. Chemistry 2014; 20:15686-91. [PMID: 25322920 PMCID: PMC4497327 DOI: 10.1002/chem.201404988] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Indexed: 11/15/2022]
Abstract
Catechol intradiol dioxygenation is a unique reaction catalyzed by iron-dependent enzymes and non-heme iron(III) complexes. The mechanism by which these systems activate dioxygen in this important metabolic process remains controversial. Using a combination of kinetic measurements and computational modelling of multiple iron(III) catecholato complexes, we have elucidated the catechol cleavage mechanism and show that oxygen binds the iron center by partial dissociation of the substrate from the iron complex. The iron(III) superoxide complex that is formed subsequently attacks the carbon atom of the substrate by a rate-determining C-O bond formation step.
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Affiliation(s)
- Robin Jastrzebski
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
- The Manchester Institute for Biotechnology and the School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester, M1 7DN (UK)
| | - Matthew G Quesne
- The Manchester Institute for Biotechnology and the School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester, M1 7DN (UK)
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
| | - Sam P de Visser
- The Manchester Institute for Biotechnology and the School of Chemical Engineering and Analytical Science, The University of Manchester131 Princess Street, Manchester, M1 7DN (UK)
| | - Pieter C A Bruijnincx
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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26
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Kerber WD, Perez KA, Ren C, Siegler MA. Speciation of Ferric Phenoxide Intermediates during the Reduction of Iron(III)−μ-Oxo Dimers by Hydroquinone. Inorg Chem 2014; 53:11507-16. [DOI: 10.1021/ic5014347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- William D. Kerber
- Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
| | - Kaitlyn A. Perez
- Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
| | - Chuqiao Ren
- Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, United States
| | - Maxime A. Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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27
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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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28
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Tissot A, Fertey P, Guillot R, Briois V, Boillot M. Structural, Magnetic, and Vibrational Investigations of Fe
III
Spin‐Crossover Compounds [Fe(4‐MeO–SalEen)
2
]X with X = NO
3
–
and PF
6
–. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300960] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Antoine Tissot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
| | - Pierre Fertey
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, 91192 Gif sur Yvette, France
| | - Régis Guillot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
| | - Valérie Briois
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, 91192 Gif sur Yvette, France
| | - Marie‐Laure Boillot
- ICMMO‐ECI, UMR CNRS 8182, Université Paris‐Sud, 91405 Orsay, France, http://www.icmmo.u‐psud.fr/labos/LCI
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29
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Gómez-Casado C, Roth-Walter F, Jensen-Jarolim E, Díaz-Perales A, Pacios LF. Modeling iron-catecholates binding to NGAL protein. J Mol Graph Model 2013; 45:111-21. [DOI: 10.1016/j.jmgm.2013.08.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 08/08/2013] [Accepted: 08/12/2013] [Indexed: 10/26/2022]
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30
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Walter M, Amann T, Li K, Kailer A, Rühe J, Moseler M. 1,3-Diketone Fluids and Their Complexes with Iron. J Phys Chem A 2013; 117:3369-76. [PMID: 23534895 DOI: 10.1021/jp400980y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Walter
- FMF, Freiburg Materials Research
Center, University of Freiburg, Stefan-Meier-Straße
21, 79104 Freiburg, Germany
- IWM, Fraunhofer Institute for Mechanics of Materials, Woehlerstraße
11, 79108 Freiburg, Germany
| | - Tobias Amann
- IWM, Fraunhofer Institute for Mechanics of Materials, Woehlerstraße
11, 79108 Freiburg, Germany
| | - Ke Li
- IMTEK, Department of Microsystems
Engineering, University of Freiburg, Georges-Köhler-Allee
103, D-79110 Freiburg, Germany
| | - Andreas Kailer
- IWM, Fraunhofer Institute for Mechanics of Materials, Woehlerstraße
11, 79108 Freiburg, Germany
| | - Jürgen Rühe
- IMTEK, Department of Microsystems
Engineering, University of Freiburg, Georges-Köhler-Allee
103, D-79110 Freiburg, Germany
| | - Michael Moseler
- IWM, Fraunhofer Institute for Mechanics of Materials, Woehlerstraße
11, 79108 Freiburg, Germany
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31
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King P, Henkelis JJ, Kilner CA, Halcrow MA. Four new spin-crossover salts of [Fe(3-bpp)2]2+ (3-bpp=2,6-bis[1H-pyrazol-3-yl]pyridine). Polyhedron 2013. [DOI: 10.1016/j.poly.2012.03.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Tissot A, Shepherd HJ, Toupet L, Collet E, Sainton J, Molnár G, Guionneau P, Boillot M. Temperature‐ and Pressure‐Induced Switching of the Molecular Spin State of an Orthorhombic Iron(III) Spin‐Crossover Salt. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201201059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Antoine Tissot
- ICMMO, Univ. Paris‐Sud 11, UMR CNRS 8182, 91405 Orsay Cedex, France, Fax: +33‐1‐69154755, http://www.icmo.u‐psud.fr/Labos/LCI/
| | | | - Loic Toupet
- Institut de Physique de Rennes, UMR 6251 UR1‐CNRS Bat 11A Campus de Beaulieu, University Rennes 1 35042 Rennes Cedex, France
| | - Eric Collet
- Institut de Physique de Rennes, UMR 6251 UR1‐CNRS Bat 11A Campus de Beaulieu, University Rennes 1 35042 Rennes Cedex, France
| | - Joelle Sainton
- ICMMO, Univ. Paris‐Sud 11, UMR CNRS 8182, 91405 Orsay Cedex, France, Fax: +33‐1‐69154755, http://www.icmo.u‐psud.fr/Labos/LCI/
| | - Gabor Molnár
- LCC, UPR CNRS 8241 31077 Toulouse Cedex 04, France
| | | | - Marie‐Laure Boillot
- ICMMO, Univ. Paris‐Sud 11, UMR CNRS 8182, 91405 Orsay Cedex, France, Fax: +33‐1‐69154755, http://www.icmo.u‐psud.fr/Labos/LCI/
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33
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Yuki M, Tanaka H, Sasaki K, Miyake Y, Yoshizawa K, Nishibayashi Y. Iron-catalysed transformation of molecular dinitrogen into silylamine under ambient conditions. Nat Commun 2012; 3:1254. [DOI: 10.1038/ncomms2264] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 11/06/2012] [Indexed: 02/02/2023] Open
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Nakatani N, Hitomi Y, Sakaki S. Multistate CASPT2 Study of Native Iron(III)-Dependent Catechol Dioxygenase and Its Functional Models: Electronic Structure and Ligand-to-Metal Charge-Transfer Excitation. J Phys Chem B 2011; 115:4781-9. [DOI: 10.1021/jp110045f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - Shigeyoshi Sakaki
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
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35
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Nippe M, Wang J, Bill E, Hope H, Dalal NS, Berry JF. Crystals in which some metal atoms are more equal than others: inequalities from crystal packing and their spectroscopic/magnetic consequences. J Am Chem Soc 2011; 132:14261-72. [PMID: 20860382 DOI: 10.1021/ja106510g] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Crystal structures of the heterometallic compounds CrCrFe(dpa)(4)Cl(2) (1), CrCrMn(dpa)(4)Cl(2) (2), and MoMoMn(dpa)(4)Cl(2) (3) (dpa = 2,2'-dipyridylamide) show disorder in the metal atom positions such that the linear M(A)[quadruple bond]M(A)···M(B) array for a given molecule in the crystal is oriented in one of two opposing directions. Despite the fact that the direct coordination sphere of the metals in the two crystallographically independent orientations is identical, subtle differences in some metal-ligand bond distances are observed in 1 and 3 due to differences in the orientation of a solvent molecule of crystallization. The Fe(II) and Mn(II) ions serve as sensitive local spectroscopic probes that have been interrogated by Mössbauer spectroscopy and high-field EPR spectroscopy, respectively. The subtle differences in the two independent Fe and Mn sites in 1 and 3 unexpectedly give rise to unusually large differences in the measured Fe quadrupole splitting (ΔE(Q)) in 1 and Mn zero-field splitting (D) in 3. Variable-temperature/single-crystal EPR spectroscopy has allowed us to determine that the temperature-dependent D tensors in 3 are oriented along the metal-metal axis and that they show significantly different dynamic behavior with temperature. The differences in ΔE(Q) and D are reproduced by density functional calculations on truncated models for 1 and 3 that lack the quadruply bonded M(A)[quadruple bond]M(A) groups, though the magnitude of the calculated effect is not as large as that observed experimentally. We suggest that the large observed differences in ΔE(Q) and D for the individual sites could be due to the influence of the strong diamagnetic anisotropy of the quadruply bonded M[quadruple bond]M unit.
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Affiliation(s)
- Michael Nippe
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA
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36
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Bréfuel N, Collet E, Watanabe H, Kojima M, Matsumoto N, Toupet L, Tanaka K, Tuchagues JP. Nanoscale Self-Hosting of Molecular Spin-States in the Intermediate Phase of a Spin-Crossover Material. Chemistry 2010; 16:14060-8. [DOI: 10.1002/chem.201001264] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Ortega-Villar NA, Muñoz MC, Real JA. [FeIII(bztpen)(OCH3)](PF6)2: Stable Methoxide-Iron(III) Complex Exhibiting Spin Crossover Behavior in the Solid State. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000791] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Chaudhary A, Patra R, Rath SP. Binding of Catechols to Iron(III)-Octaethylporphyrin: An Experimental and DFT Investigation. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000707] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Ando H, Nakao Y, Sato H, Sakaki S. Comparison of electronic structures and light-induced excited spin state trapping between [Fe(2-picolylamine)(3)](2+) and its iron(III) analogue. Dalton Trans 2010; 39:1836-45. [PMID: 20449430 DOI: 10.1039/b913927c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated mer- and fac-[Fe(II)(2-pic)(3)](2+) (pic = picolylamine) and Fe(iii) analogue, mer-[Fe(III)(2-pic)(3)](3+), by the DFT method to clarify the mechanism of light-induced excited spin state trapping (LIESST). In mer-[Fe(II)(2-pic)(3)](2+), the potential energy surface (PES) of the triplet state is the least stable but it is close to the PESs of the singlet and quintet states at the equilibrium geometry of the triplet state within 5 kcal mol(-1). This indicates that intersystem crossing occurs from the triplet state to either the singlet state or the quintet state around the equilibrium geometry of the triplet state. The quintet state is as stable as the singlet state in their equilibrium geometries. All Fe-N bonds of the quintet state are longer than those of the singlet state by about 0.19 A. These are consistent with the general understanding that the Fe-ligand distances are considerably different but the relative stability is little different between the low spin and high spin states in LIESST complexes. Actually, a large activation barrier is calculated for the conversion between the singlet and quintet states, which is enough to suppress thermal spin transition and tunneling between them. The d-d transition energies are calculated with the TD-DFT method to be 2.05, 2.07, and 2.09 eV in the singlet state and 1.46 and 1.64 eV in the quintet state. Because of the significantly large difference in excitation energy between the singlet and quintet states, irradiation of visible light with different wavelengths selectively induces the excitation to the singlet excited state or the quintet one. All these results are consistent with the fact that both LIESST and reverse-LIESST are observed in mer-[Fe(II)(2-pic)(3)](2+). The fac-isomer is also useful for the LIESST/reverse-LIESST, though the mer-isomer is better. In the Fe(iii) analogue, mer-[Fe(III)(2-pic)(3)](3+), the DFT-computational results indicate small activation barriers and a large overlap of absorption spectra between the doublet and sextet states. Also, the Fe(III)-N bond distances are less different between the low spin and high spin states than the Fe(II)-N ones, leading to the narrow potential wall between the doublet and sextet states. As a result, the LIESST and reverse-LIESST cannot be observed in this Fe(iii) complex.
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Affiliation(s)
- Hideo Ando
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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40
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Kilner CA, Halcrow MA. An unusual discontinuity in the thermal spin transition in [Co(terpy)2][BF4]2. Dalton Trans 2010; 39:9008-12. [DOI: 10.1039/c0dt00295j] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Milko P, Roithová J. Redox Processes in the Iron(III)/9,10-Phenanthraquinone System. Inorg Chem 2009; 48:11734-42. [PMID: 19928842 DOI: 10.1021/ic901789h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Petr Milko
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Praha 6, Czech Republic
| | - Jana Roithová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Praha 6, Czech Republic
- Department of Organic Chemistry, Faculty of Sciences, Charles University in Prague, Hlavova 8, 12843 Prague 2, Czech Republic
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42
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Southon PD, Liu L, Fellows EA, Price DJ, Halder GJ, Chapman KW, Moubaraki B, Murray KS, Létard JF, Kepert CJ. Dynamic Interplay between Spin-Crossover and Host−Guest Function in a Nanoporous Metal−Organic Framework Material. J Am Chem Soc 2009; 131:10998-1009. [DOI: 10.1021/ja902187d] [Citation(s) in RCA: 383] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter D. Southon
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Lang Liu
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Elizabeth A. Fellows
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - David J. Price
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Gregory J. Halder
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Karena W. Chapman
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Boujemaa Moubaraki
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Keith S. Murray
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Jean-François Létard
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
| | - Cameron J. Kepert
- School of Chemistry, The University of Sydney, NSW 2006, Australia, Materials Science Division and X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, School of Chemistry, Monash University, VIC 3800, Australia, and Laboratoire des Sciences Moléculaires, ICMCB (CNRS UPR 9048), Université Bordeaux I, 33608 Pessac, France
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Lorenc M, Hébert J, Moisan N, Trzop E, Servol M, Buron-Le Cointe M, Cailleau H, Boillot ML, Pontecorvo E, Wulff M, Koshihara S, Collet E. Successive dynamical steps of photoinduced switching of a molecular Fe(III) spin-crossover material by time-resolved x-ray diffraction. PHYSICAL REVIEW LETTERS 2009; 103:028301. [PMID: 19659251 DOI: 10.1103/physrevlett.103.028301] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Indexed: 05/28/2023]
Abstract
We investigate the out-of-equilibrium switching dynamics of a molecular Fe(III) spin-crossover solid triggered by a femtosecond laser flash. The time-resolved x-ray diffraction and optical results show that the dynamics span from subpicosecond local photoswitching followed by volume expansion (nanosecond) and thermal switching (microsecond). We present a physical picture of the consecutive steps in the photoswitching of molecular materials.
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Affiliation(s)
- M Lorenc
- Institut de Physique de Rennes, Université de Rennes 1-CNRS, UMR 6251, 35042 Rennes, France
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44
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An EPR investigation of the electronic structure of pseudo-octahedral and spin crossover catecholato-iron(III) complexes in the low-spin state. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.03.077] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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45
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Ordejón B, de Graaf C, Sousa C. Light-Induced Excited-State Spin Trapping in Tetrazole-Based Spin Crossover Systems. J Am Chem Soc 2008; 130:13961-8. [DOI: 10.1021/ja804506h] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Belén Ordejón
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel-lí Domingo s/n, 43007 Tarragona, Spain, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain, and Departament de Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel-lí Domingo s/n, 43007 Tarragona, Spain, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain, and Departament de Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - Carmen Sousa
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel-lí Domingo s/n, 43007 Tarragona, Spain, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain, and Departament de Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
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Lebedev AV, Ivanova MV, Timoshin AA, Ruuge EK. Effect of group II metal cations on catecholate oxidation. Chemphyschem 2007; 8:1863-9. [PMID: 17634998 DOI: 10.1002/cphc.200700296] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The unexpected effects of Ca(2+) on the free-radical chain reactions of dopamine, norepinephrine, isoproterenol, and pyrocatechol oxidation are studied using oxygen consumption measurements, EPR-spectroscopy, UV/VIS spectrophotometry, and by potentiometric titration. It is found that the formation of Ca(2+)-catecholate complexes is accompanied by an increase in the dissociation constants (K(ai) ) of their phenolic hydroxyls. At pH>pK(ai) and in the presence of alkaline-earth metal cations, the rate of catecholate oxidation increases (Ca(2+), Mg(2+)> Sr(2+), Ba(2+)), whereas on addition of Zn ions the rate decreases. The effects of Group II metal cations on catecholate autoxidation are concomitant with a transient increase of the EPR signal for metal-semiquinonate complexes. Therefore, the effects of Ca(2+) and other alkaline-earth metal cations on catecholate autoxidation can be defined as 1) additional deprotonation of catechol OH-groups involved in the formation of M(2+)-catecholate complexes, the latter exceeding catechols in the susceptibility to dioxygen-induced oxidation and 2) formation of relatively stable free-radical intermediates responsible for chain propagation.
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Affiliation(s)
- Alexander V Lebedev
- Department of Biochemistry, Institute of Experimental Cardiology, Cardiology Research Center, 3rdCherepkovskaya Street 15A, 121552 Moscow, Russia.
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Ando H, Nakao Y, Sato H, Sakaki S. Theoretical Study of Low-Spin, High-Spin, and Intermediate-Spin States of [FeIII(pap)2]+ (pap = N-2-pyridylmethylidene-2-hydroxyphenylaminato). Mechanism of Light-Induced Excited Spin State Trapping. J Phys Chem A 2007; 111:5515-22. [PMID: 17547380 DOI: 10.1021/jp0714163] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of light-induced excited spin state trapping (LIESST) of [FeIII(pap)2]+ (pap = N-2-pyridylmethylidene-2-hydroxyphenylaminato) was discussed on the basis of potential energy surfaces (PESs) of several important spin states, where the PESs were evaluated with the DFT(B3LYP) method. The PES of the quartet spin state crosses those of the doublet and sextet spin states around its minimum. This means that the spin transition occurs from the quartet spin state to either the doublet spin state or the sextet spin state around the PES minimum of the quartet spin state. The PES minimum of the sextet spin state is slightly less stable than that of the doublet spin state by 0.18 eV (4.2 kcal/mol). This small energy difference is favorable for the LIESST. The doublet-sextet spin crossover point is 0.41 eV (9.6 kcal/mol) above the PES minimum of the sextet spin state. Because of this considerably large activation barrier, the thermal spin transition and the tunneling process do not occur easily. In the doublet spin state, the ligand to ligand charge transfer (LLCT) transition is calculated to be 2.16 eV with the TD-DFT(B3LYP) method, in which the pi orbital of the phenoxy moiety and the pi* orbital of the imine moiety in the pap ligand participate. This transition energy is moderately smaller than the visible light of 550 nm used experimentally. In the sextet spin state, the ligand to metal charge transfer (LMCT) transition is calculated to be at 2.36 eV, which is moderately higher than the visible light (550 nm). These results indicate that the irradiation of the visible light induces the LIESST to generate the sextet spin state but the reverse-LIESST is also somewhat induced by the visible light, indicating that the complete spin conversion from the doublet spin state to the sextet one does not occur, as reported experimentally.
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Affiliation(s)
- Hideo Ando
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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Krivokapic I, Zerara M, Daku ML, Vargas A, Enachescu C, Ambrus C, Tregenna-Piggott P, Amstutz N, Krausz E, Hauser A. Spin-crossover in cobalt(II) imine complexes. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.05.006] [Citation(s) in RCA: 198] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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