51
|
Witt A, Heinemann FW, Sproules S, Khusniyarov MM. Modulation of Magnetic Properties at Room Temperature: Coordination-Induced Valence Tautomerism in a Cobalt Dioxolene Complex. Chemistry 2014; 20:11149-62. [DOI: 10.1002/chem.201402129] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Indexed: 11/06/2022]
|
52
|
New high-spin iron complexes based on bis(imino)acenaphthenes (BIAN): synthesis, structure, and magnetic properties. Russ Chem Bull 2014. [DOI: 10.1007/s11172-013-0311-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
53
|
Bittner MM, Lindeman SV, Popescu CV, Fiedler AT. Dioxygen reactivity of biomimetic Fe(II) complexes with noninnocent catecholate, o-aminophenolate, and o-phenylenediamine ligands. Inorg Chem 2014; 53:4047-61. [PMID: 24697567 PMCID: PMC3998776 DOI: 10.1021/ic403126p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Indexed: 11/28/2022]
Abstract
This study describes the O2 reactivity of a series of high-spin mononuclear Fe(II) complexes each containing the facially coordinating tris(4,5-diphenyl-1-methylimidazol-2-yl)phosphine ((Ph2)TIP) ligand and one of the following bidentate, redox-active ligands: 4-tert-butylcatecholate ((tBu)CatH(-)), 4,6-di-tert-butyl-2-aminophenolate ((tBu2)APH(-)), or 4-tert-butyl-1,2-phenylenediamine ((tBu)PDA). The preparation and X-ray structural characterization of [Fe(2+)((Ph2)TIP)((tBu)CatH)]OTf, [3]OTf and [Fe(2+)((Ph2)TIP)((tBu)PDA)](OTf)2, [4](OTf)2 are described here, whereas [Fe(2+)((Ph2)TIP)((tBu2)APH)]OTf, [2]OTf was reported in our previous paper [Bittner et al., Chem.-Eur. J. 2013, 19, 9686-9698]. These complexes mimic the substrate-bound active sites of nonheme iron dioxygenases, which catalyze the oxidative ring-cleavage of aromatic substrates like catechols and aminophenols. Each complex is oxidized in the presence of O2, and the geometric and electronic structures of the resulting complexes were examined with spectroscopic (absorption, EPR, Mössbauer, resonance Raman) and density functional theory (DFT) methods. Complex [3]OTf reacts rapidly with O2 to yield the ferric-catecholate species [Fe(3+)((Ph2)TIP)((tBu)Cat)](+) (3(ox)), which undergoes further oxidation to generate an extradiol cleavage product. In contrast, complex [4](2+) experiences a two-electron (2e(-)), ligand-based oxidation to give [Fe(2+)((Ph2)TIP)((tBu)DIBQ)](2+) (4(ox)), where DIBQ is o-diiminobenzoquinone. The reaction of [2](+) with O2 is also a 2e(-) process, yet in this case both the Fe center and (tBu2)AP ligand are oxidized; the resulting complex (2(ox)) is best described as [Fe(3+)((Ph2)TIP)((tBu2)ISQ)](+), where ISQ is o-iminobenzosemiquinone. Thus, the oxidized complexes display a remarkable continuum of electronic structures ranging from [Fe(3+)(L(2-))](+) (3(ox)) to [Fe(3+)(L(•-))](2+) (2(ox)) to [Fe(2+)(L(0))](2+) (4(ox)). Notably, the O2 reaction rates vary by a factor of 10(5) across the series, following the order [3](+) > [2](+) > [4](2+), even though the complexes have similar structures and Fe(3+/2+) redox potentials. To account for the kinetic data, we examined the relative abilities of the title complexes to bind O2 and participate in H-atom transfer reactions. We conclude that the trend in O2 reactivity can be rationalized by accounting for the role of proton transfer(s) in the overall reaction.
Collapse
Affiliation(s)
- Michael M. Bittner
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, United States
| | - Sergey V. Lindeman
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, United States
| | - Codrina V. Popescu
- Department of Chemistry, Ursinus College, Collegeville, Pennsylvania 19426, United States
| | - Adam T. Fiedler
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, United States
| |
Collapse
|
54
|
Patra SC, Weyhermüller T, Ghosh P. Ruthenium, Rhodium, Osmium, and Iridium Complexes of Osazones (Osazones = Bis-Arylhydrazones of Glyoxal): Radical versus Nonradical States. Inorg Chem 2014; 53:2427-40. [DOI: 10.1021/ic4022432] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarat Chandra Patra
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata 103, West Bengal, India
| | - Thomas Weyhermüller
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Prasanta Ghosh
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata 103, West Bengal, India
| |
Collapse
|
55
|
Chandra Patra S, Saha Roy A, Manivannan V, Weyhermüller T, Ghosh P. Ruthenium, osmium and rhodium complexes of 1,4-diaryl 1,4-diazabutadiene: radical versus non-radical states. Dalton Trans 2014; 43:13731-41. [DOI: 10.1039/c4dt01241k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular and electronic structures of the ruthenium, osmium and rhodium complexes of 1,4-di(3-nitrophenyl)-1,4-diazabutadiene (LDAB) and their redox series are reported.
Collapse
Affiliation(s)
- Sarat Chandra Patra
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-700103, India
| | - Amit Saha Roy
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-700103, India
| | | | - Thomas Weyhermüller
- Max-Planck-Institut für Chemische Eneriekonversion
- 45470 Mülheim an der Ruhr, Germany
| | - Prasanta Ghosh
- Department of Chemistry
- R. K. Mission Residential College
- Kolkata-700103, India
| |
Collapse
|
56
|
Robinson S, Davies ES, Lewis W, Blake AJ, Liddle ST. Alkali metal derivatives of an ortho-phenylene diamine. Dalton Trans 2014; 43:4351-60. [DOI: 10.1039/c3dt52632a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
57
|
Son MY, Hong YJ, Lee JK, Chan Kang Y. One-pot synthesis of Fe2O3 yolk-shell particles with two, three, and four shells for application as an anode material in lithium-ion batteries. NANOSCALE 2013; 5:11592-11597. [PMID: 24122066 DOI: 10.1039/c3nr03978a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fe2O3 yolk-shell particles with two, three, and four shells are prepared by one-pot spray pyrolysis. The discharge capacity of the Fe2O3 yolk-shell particles with two shells showing the best electrochemical properties is as high as 848 mA h g(-1) after 80 cycles at a current density of 300 mA g(-1).
Collapse
Affiliation(s)
- Mun Yeong Son
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea.
| | | | | | | |
Collapse
|
58
|
Kochem A, Gellon G, Leconte N, Baptiste B, Philouze C, Jarjayes O, Orio M, Thomas F. Stable anilinyl radicals coordinated to nickel: X-ray crystal structure and characterization. Chemistry 2013; 19:16707-21. [PMID: 24281814 DOI: 10.1002/chem.201303228] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Indexed: 11/11/2022]
Abstract
Two anilinosalen and a mixed phenol-anilinosalen ligands involving sterically hindered anilines moieties were synthesized. Their nickel(II) complexes 1, 2, and 3 were prepared and characterized. They could be readily one-electron oxidized (E(1/2)=-0.30, -0.26 and 0.10 V vs. Fc(+)/Fc, respectively) into anilinyl radicals species [1](+), [2](+), and [3](+), respectively. The radical complexes are extremely stable and were isolated as single crystals. X-ray crystallographic structures reveal that the changes in bond length resulting from oxidation do not exceed 0.02 Å within the ligand framework in the symmetrical [1](+) and [2](+). No quinoid bond pattern was present. In contrast, larger structural rearrangements were evidenced for the unsymmetrical [3](+), with shortening of one C(ortho)-C(meta) bond. Radical species [1](+) and [2](+) exhibit a strong absorption band at around 6000 cm(-1) (class III mixed valence compounds). This band is significantly less intense than [3](+), consistent with a rather localized anilinyl radical character, and thus a classification of this species as class II mixed-valence compound. Magnetic and electronic properties, as well as structural parameters, have been computed by DFT methods.
Collapse
Affiliation(s)
- Amélie Kochem
- Département de Chimie Moléculaire, Chimie Inorganique Redox Biomimétique (CIRE), UMR-5250, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9 (France), Fax: (+33) 476-51-4836
| | | | | | | | | | | | | | | |
Collapse
|
59
|
Kundu S, Maity S, Saha Sardar P, Ghosh S, Ghosh P. Mono- and di-nuclear photoluminescent complexes of zinc(II), cadmium(II) and mercury(II) of a chiral diimine ligand. Dalton Trans 2013; 42:13026-35. [PMID: 23872725 DOI: 10.1039/c3dt51348c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of α-pyridoin and N-phenyl-o-phenylenediamine affords 2-(2-(phenylamino)phenylimino)-1,2-di(pyridin-2-yl)ethanol (L) which undergoes cyclization to a chiral diimine, 2-methoxy-1-phenyl-2,3-di(pyridin-2-yl)-1,2-dihydroquinoxaline, L(OMe) (conjugated 14πe system) in the presence of zinc(II), cadmium(II) and mercury(II) ions affording [Zn(L(OMe))Cl2] (1), [Cd2(L(OMe))2Cl4] (2) and [Hg2(L(OMe))2Cl4] (3) complexes. Ligand L and complexes 1-3 are substantiated by elemental analyses, mass, IR, (1)H NMR and UV-vis spectra including the single-crystal X-ray structures of 1 and 3. The possibility of the atropisomerism of L is restricted in cyclic L(OMe). L and complexes 1-3 are fluorescent in fluid solutions at 298 K (CH2Cl2: 1, λ(ex) = 470 nm, λ(em) = 627 nm, Φ = 0.014, τ(avg) = 2.5 ns; 2, λ(ex) = 430 nm, λ(em) = 599 nm, Φ = 0.08, τ(avg) = 7.6 ns; 3, λ(ex) = 415 nm, λ(em) = 600 nm, Φ = 0.021, τ(avg) = 2.8 ns). Time-resolved emission spectra (TRES) established that the two-component lifetimes of 1-3 are due to the existence of two conformers. Density functional theory (DFT) and time dependent (TD) DFT calculations authenticated that 1-3 complexes are fluorescent due to intra-ligand charge transfer (ILCT) to the π(diimines)* orbital.
Collapse
Affiliation(s)
- Suman Kundu
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata 700 103, India.
| | | | | | | | | |
Collapse
|
60
|
Eiβler A, Kläring P, Emmerling F, Braun T. α‐Dialdimine Complexes of Rhodium(I) and Iridium(I): Their Reactivity with Dioxygen and Dihydrogen. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna Eiβler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Paul Kläring
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, Richard‐Willstätter‐Str. 11, 12489 Berlin, Germany
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| |
Collapse
|
61
|
Gass IA, Tewary S, Nafady A, Chilton NF, Gartshore CJ, Asadi M, Lupton DW, Moubaraki B, Bond AM, Boas JF, Guo SX, Rajaraman G, Murray KS. Observation of Ferromagnetic Exchange, Spin Crossover, Reductively Induced Oxidation, and Field-Induced Slow Magnetic Relaxation in Monomeric Cobalt Nitroxides. Inorg Chem 2013; 52:7557-72. [DOI: 10.1021/ic400565h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ian A. Gass
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Subrata Tewary
- Department
of Chemistry, Indian Institute of Technology—Bombay, Powai, Mumbai, India
| | - Ayman Nafady
- Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh−11451, Kingdom of Saudi Arabia
| | | | | | - Mousa Asadi
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - David W. Lupton
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Boujemaa Moubaraki
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - John F. Boas
- School of Physics, Monash University,
Clayton, Victoria 3800, Australia
| | - Si-Xuan Guo
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Gopalan Rajaraman
- Department
of Chemistry, Indian Institute of Technology—Bombay, Powai, Mumbai, India
| | - Keith S. Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| |
Collapse
|
62
|
Hong YJ, Son MY, Kang YC. One-pot facile synthesis of double-shelled SnO₂ yolk-shell-structured powders by continuous process as anode materials for Li-ion batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:2279-2250. [PMID: 23371548 DOI: 10.1002/adma.201204506] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/08/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Young Jun Hong
- Department of Chemical Engineering, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul 143-701 Korea
| | | | | |
Collapse
|
63
|
Corn IR, Astudillo-Sánchez PD, Zdilla MJ, Fanwick PE, Shaw MJ, Miller JT, Evans DH, Abu-Omar MM. Synthesis and Electrochemical Reactivity of Molybdenum Dicarbonyl Supported by a Redox-Active α-Diimine Ligand. Inorg Chem 2013; 52:5457-63. [PMID: 23578340 DOI: 10.1021/ic400348j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Isaac R. Corn
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Pablo D. Astudillo-Sánchez
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Michael J. Zdilla
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Michael J. Shaw
- Department of Chemistry, Southern Illinois University at Edwardsville, Edwardsville, Illinois 62026, United States
| | - Jeffrey T. Miller
- Chemical Sciences and Engineering
Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Dennis H. Evans
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| |
Collapse
|
64
|
Shuster V, Gambarotta S, Nikiforov GB, Budzelaar PHM. Heterometallic Aluminum–Chromium Phenazine and Thiophenazine Complexes. Formation of a Tetranuclear Chromium(I) Sandwich Complex. Organometallics 2013. [DOI: 10.1021/om3012097] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | | | | |
Collapse
|
65
|
Chaudhuri S, Patra SC, Saha P, Saha Roy A, Maity S, Bera S, Saha Sardar P, Ghosh S, Weyhermüller T, Ghosh P. Zinc(ii), iron(ii/iii) and ruthenium(ii) complexes of o-phenylenediamine derivatives: oxidative dehydrogenation and photoluminescence. Dalton Trans 2013; 42:15028-42. [DOI: 10.1039/c3dt51771c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
66
|
Janes T, Rawson JM, Song D. Syntheses and structures of Li, Fe, and Mo derivatives of N,N′-bis(2,6-diisopropylphenyl)-o-phenylenediamine. Dalton Trans 2013; 42:10640-8. [DOI: 10.1039/c3dt51063h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
67
|
Williams VA, Hulley EB, Wolczanski PT, Lancaster KM, Lobkovsky EB. Exploring the limits of redox non-innocence: pseudo square planar [{κ4-Me2C(CH2NCHpy)2}Ni]n (n = 2+, 1+, 0, −1, −2) favor Ni(ii). Chem Sci 2013. [DOI: 10.1039/c3sc50743b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
68
|
Dugan TR, Bill E, MacLeod KC, Christian GJ, Cowley RE, Brennessel WW, Ye S, Neese F, Holland PL. Reversible C–C Bond Formation between Redox-Active Pyridine Ligands in Iron Complexes. J Am Chem Soc 2012. [DOI: 10.1021/ja305679m] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Thomas R. Dugan
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - K. Cory MacLeod
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Gemma J. Christian
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Ryan E. Cowley
- Department of Chemistry, University of Rochester, Rochester, New York
| | | | - Shengfa Ye
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | | |
Collapse
|
69
|
Shuster V, Gambarotta S, Nikiforov GB, Korobkov I, Budzelaar PHM. Radical Cleavage of Al–C Bonds Promoted by Phenazine: From Noninnocent Ligand to Radical Abstractor. Organometallics 2012. [DOI: 10.1021/om300889m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Ilia Korobkov
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | | |
Collapse
|
70
|
Huang J, Wang W, Yang S, Li Q, Yang J. Efficient spin filter based on FeN4 complexes between carbon nanotube electrodes. NANOTECHNOLOGY 2012; 23:255202. [PMID: 22652524 DOI: 10.1088/0957-4484/23/25/255202] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We present a theoretical study to explore the spin transport properties of FeN(4) complexes sandwiched between two armchair (5, 5) carbon nanotube (CNT) electrodes. The ab initio modeling is performed by combining the spin-dependent density functional theory with nonequilibrium Green's function formalism. The calculated results clearly demonstrate that the transport properties of FeN(4) complexes are sensitive to the contact configuration. Near the Fermi level the conductance through three examined junctions is mainly governed by the spin-up electrons. The FeN(4) complex coupled to CNT electrodes with the π-type contact conjugation can act as a nearly perfect spin filter, and its spin filter efficiency is up to 98.0%. Our theoretical results demonstrate that FeN(4) complexes are promising for future molecular spintronics devices.
Collapse
Affiliation(s)
- Jing Huang
- School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui, People's Republic of China
| | | | | | | | | |
Collapse
|
71
|
Chatterjee S, Mandal S, Samanta S, Goswami S. Bis(acetonitrile)bis(acetylacetonato)ruthenium(III) mediated chemical transformations of coordinated 2-methylthioanilide. Dalton Trans 2012; 41:7057-66. [PMID: 22555595 DOI: 10.1039/c2dt30344b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chemical reaction of [Ru(III)(acac)(2)(CH(3)CN)(2)]ClO(4) (1) with 2-methylthioaniline, HL(1) in ethanol under basic conditions yielded three new complexes Ru(II)(acac)(2)(L(1b)) (1b), (L(1b) = 4-imino-3-(methylsulfanyl)cyclohexa-2,5-dien-1-one), Ru(III)(acac)(2)(L(1c)) (1c), (HL(1c) = N-(2-methylthiophenyl)formamide) and (acac)(2)Ru(II)(μ-L(1d))Ru(II)(acac)(2) (1d), (L(1d) = 1,4-bis(2-methylthioaniline)-1,4-diazabutadiene) via the intermediate Ru(III)(acac)(2)(L(1a)) (1a, L(1a) = (L(1))(-) = 2-methylthioanilide). The reaction proceeded through temperature induced valence tautomerisation between the Ru(III) center and its 2-methylthioanilide counterpart in 1a with concomitant reduction of ruthenium from +III to +II oxidation state and oxidation of ligand L(1a), resulting in aromatic ring hydroxylation, N-formylation and C-C bond formation reactions. All the complexes have been characterised by their single-crystal X-ray structure determination and various spectroscopic and electrochemical techniques. The identity of complex 1a has been confirmed by X-ray crystal structure determination of complex 2, a phenyl analogue of complex 1a. The complexes (1a-d) showed intense charge transfer (MLCT/LMCT) transition in the long wavelength region. The paramagnetic compounds, 1a and 1c, along with the diamagnetic compound 1b showed two one-electron responses in the ranges, -0.4 to -1.0 V and 0.3 to 1.1 V. The diamagnetic complex 1d displayed two successive one-electron reversible reductions (-1.31 and -1.55 V) and two one-electron reversible oxidation processes (-0.036 and 0.51 V). The redox processes are characterized by EPR spectroscopy and spectroelectrochemistry. The compound 1c has been found to exhibit solvatochromism and concentration dependent aggregation in solution.
Collapse
Affiliation(s)
- Sudipta Chatterjee
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | | | | | | |
Collapse
|
72
|
Biswas MK, Patra SC, Maity AN, Ke SC, Adhikary ND, Ghosh P. Electronic Structures of Ruthenium and Osmium Complexes of 9,10-Phenanthrenequinone. Inorg Chem 2012; 51:6687-99. [DOI: 10.1021/ic300327x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Manas Kumar Biswas
- Department of Chemistry, R. K. Mission Residential College, Narendrapur,
Kolkata 103, India
| | - Sarat Chandra Patra
- Department of Chemistry, R. K. Mission Residential College, Narendrapur,
Kolkata 103, India
| | - Amarendra Nath Maity
- Department of Physics, National Dong Hwa University, Shou-Feng,
Hualien 97401, Taiwan
| | - Shyue-Chu Ke
- Department of Physics, National Dong Hwa University, Shou-Feng,
Hualien 97401, Taiwan
| | | | - Prasanta Ghosh
- Department of Chemistry, R. K. Mission Residential College, Narendrapur,
Kolkata 103, India
| |
Collapse
|
73
|
Huang J, Wang W, Yang S, Su H, Li Q, Yang J. A theoretical study of spin-polarized transport properties of planar four-coordinate Fe complexes. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.05.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
74
|
Schnöckelborg EM, Khusniyarov MM, de Bruin B, Hartl F, Langer T, Eul M, Schulz S, Pöttgen R, Wolf R. Unraveling the electronic structures of low-valent naphthalene and anthracene iron complexes: X-ray, spectroscopic, and density functional theory studies. Inorg Chem 2012; 51:6719-30. [PMID: 22639983 DOI: 10.1021/ic300366m] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Naphthalene and anthracene transition metalates are potent reagents, but their electronic structures have remained poorly explored. A study of four Cp*-substituted iron complexes (Cp* = pentamethylcyclopentadienyl) now gives rare insight into the bonding features of such species. The highly oxygen- and water-sensitive compounds [K(18-crown-6){Cp*Fe(η(4)-C(10)H(8))}] (K1), [K(18-crown-6){Cp*Fe(η(4)-C(14)H(10))}] (K2), [Cp*Fe(η(4)-C(10)H(8))] (1), and [Cp*Fe(η(4)-C(14)H(10))] (2) were synthesized and characterized by NMR, UV-vis, and (57)Fe Mössbauer spectroscopy. The paramagnetic complexes 1 and 2 were additionally characterized by electron paramagnetic resonance (EPR) spectroscopy and magnetic susceptibility measurements. The molecular structures of complexes K1, K2, and 2 were determined by single-crystal X-ray crystallography. Cyclic voltammetry of 1 and 2 and spectroelectrochemical experiments revealed the redox properties of these complexes, which are reversibly reduced to the monoanions [Cp*Fe(η(4)-C(10)H(8))](-) (1(-)) and [Cp*Fe(η(4)-C(14)H(10))](-) (2(-)) and reversibly oxidized to the cations [Cp*Fe(η(6)-C(10)H(8))](+) (1(+)) and [Cp*Fe(η(6)-C(14)H(10))](+) (2(+)). Reduced orbital charges and spin densities of the naphthalene complexes 1(-/0/+) and the anthracene derivatives 2(-/0/+) were obtained by density functional theory (DFT) methods. Analysis of these data suggests that the electronic structures of the anions 1(-) and 2(-) are best represented by low-spin Fe(II) ions coordinated by anionic Cp* and dianionic naphthalene and anthracene ligands. The electronic structures of the neutral complexes 1 and 2 may be described by a superposition of two resonance configurations which, on the one hand, involve a low-spin Fe(I) ion coordinated by the neutral naphthalene or anthracene ligand L, and, on the other hand, a low-spin Fe(II) ion coordinated to a ligand radical L(•-). Our study thus reveals the redox noninnocent character of the naphthalene and anthracene ligands, which effectively stabilize the iron atoms in a low formal, but significantly higher spectroscopic oxidation state.
Collapse
Affiliation(s)
- Eva-Maria Schnöckelborg
- Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstrasse 30, 48149 Münster, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
75
|
Deibel N, Schweinfurth D, Hohloch S, Sarkar B. Characterization of [Pd(pap)(NHC)I2]n (n=+1, 0, −1; pap=phenylazopyridine; NHC=N-heterocyclic carbene): Unusual coordination mode of pap and non-innocent behavior of NHC. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.10.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
76
|
Buncic G, Xiao Z, Drew SC, White JM, Wedd AG, Donnelly PS. Copper complexes of a novel non-innocent quadridentate ligand. Chem Commun (Camb) 2012; 48:2570-2. [DOI: 10.1039/c2cc16658e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
77
|
Xiao J, Deng L. Synthesis, Structure, and Reactivity Study of Iron(II) Complexes with Bulky Bis(anilido)thioether Ligation. Organometallics 2011. [DOI: 10.1021/om201010a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Xiao
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Road, Shanghai, People’s Republic
of China 200032
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy
of Sciences, 345 Lingling Road, Shanghai, People’s Republic
of China 200032
| |
Collapse
|
78
|
Tsurugi H, Saito T, Tanahashi H, Arnold J, Mashima K. Carbon Radical Generation by d0 Tantalum Complexes with α-Diimine Ligands through Ligand-Centered Redox Processes. J Am Chem Soc 2011; 133:18673-83. [DOI: 10.1021/ja204665s] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Teruhiko Saito
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hiromasa Tanahashi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| |
Collapse
|
79
|
Kreisel KA, Yap GPA, Theopold KH. Organochromium Complexes Bearing Noninnocent Diimine Ligands. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100803] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
80
|
Joy S, Krämer T, Paul ND, Banerjee P, McGrady JE, Goswami S. Isolation and Assessment of the Molecular and Electronic Structures of Azo-Anion-Radical Complexes of Chromium and Molybdenum. Experimental and Theoretical Characterization of Complete Electron-Transfer Series. Inorg Chem 2011; 50:9993-10004. [DOI: 10.1021/ic200708c] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sucheta Joy
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Tobias Krämer
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Nanda D. Paul
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - Priyabrata Banerjee
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| | - John E. McGrady
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Sreebrata Goswami
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata 700 032, India
| |
Collapse
|
81
|
Knisley TJ, Saly MJ, Heeg MJ, Roberts JL, Winter CH. Volatility and High Thermal Stability in Mid- to Late-First-Row Transition-Metal Diazadienyl Complexes. Organometallics 2011. [DOI: 10.1021/om200626w] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Thomas J. Knisley
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Mark J. Saly
- SAFC Hitech, 1429 Hilldale Avenue, Haverhill, Massachusetts 01832, United States
| | - Mary Jane Heeg
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | | | - Charles H. Winter
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| |
Collapse
|
82
|
Presow SR, Ghosh M, Bill E, Weyhermüller T, Wieghardt K. Molecular and electronic structures of new iron complexes containing N,S-coordinated o-iminothionebenzosemiquinonate(1-) π radical ligands: An experimental and density functional theoretical study. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
83
|
Abstract
The potential of redox-active ligands to behave "noninnocently" in transition-metal coordination compounds is reflected with respect to various aspects and situations. These include the question of establishing "correct" oxidation states, the identification and characterization of differently charged radical ligands, the listing of structural and other consequences of ligand redox reactions, and the distinction between barrierless delocalized "resonance" cases M(n)/L(n) ↔ M(n+1)L(n-1) versus separated valence tautomer equilibrium situations M(n)/L(n) ⇌ M(n+1)L(n-1). Further ambivalence arises for dinuclear systems with radical bridge M(n)(μ-L(•))M(n) versus mixed-valent alternatives M(n+1)(μ-L(-))M(n), for noninnocent ligand-bridged coordination compounds of higher nuclearity such as (μ(3)-L)M(3), (μ(4)-L)M(4), (μ-L)(4)M(4), or coordination polymers. Conversely, the presence of more than one noninnocently behaving ligand at a single transition-metal site in situations such as L(n)-M-L(n-1) or L(•)-M-L(•) may give rise to corresponding ligand-to-ligand interaction phenomena (charge transfer, electron hopping, and spin-spin coupling) and to redox-induced electron transfer with counterintuitive oxidation-state changes. The relationships of noninnocent ligand behavior with excited-state descriptions and perspectives regarding material properties and single-electron or multielectron reactivity are also illustrated briefly.
Collapse
Affiliation(s)
- Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany.
| |
Collapse
|
84
|
Roy AS, Saha P, Adhikary ND, Ghosh P. o-Iminobenzosemiquinonate and o-imino-p-methylbenzosemiquinonate anion radicals coupled VO2+ stabilization. Inorg Chem 2011; 50:2488-500. [PMID: 21348449 DOI: 10.1021/ic102296p] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The diamagnetic VO(2+)-iminobenzosemiquinonate anion radical (L(R)(IS)(•-), R = H, Me) complexes, (L(-))(VO(2+))(L(R)(IS)(•-)): (L(1)(-))(VO(2+))(L(H)(IS)(•-))•3/2MeOH (1•3/2MeOH), (L(2)(-))(VO(2+))(L(H)(IS)(•-)) (2), and (L(2)(-))(VO(2+))(L(Me)(IS)(•-))•1/2 L(Me)(AP) (3•1/2 L(Me)(AP)), incorporating tridentate monoanionic NNO-donor ligands {L = L(1)(-) or L(2)(-), L(1)H = (2-[(phenylpyridin-2-yl-methylene)amino]phenol; L(2)H = 1-(2-pyridylazo)-2-naphthol; L(H)(IS)(•-) = o-iminobenzosemiquinonate anion radical; L(Me)(IS)(•-) = o-imino-p-methylbenzosemiquinonate anion radical; and L(Me)(AP) = o-amino-p-methylphenol} have been isolated and characterized by elemental analyses, IR, mass, NMR, and UV-vis spectra, including the single-crystal X-ray structure determinations of 1•3/2MeOH and 3•1/2 L(Me)(AP). Complexes 1•3/2MeOH, 2, and 3•1/2 L(Me)(AP) absorb strongly in the visible region because of intraligand (IL) and ligand-to-metal charge transfers (LMCT). 1•3/2MeOH is luminescent (λ(ext), 333 nm; λ(em), 522, 553 nm) in frozen dichloromethane-toluene glass at 77 K due to π(diimine→)π(diimine)* transition. The V-O(phenolato) (cis to the V═O) lengths, 1.940(2) and 1.984(2) Å, respectively, in 1•3/2MeOH and 3•1/2 L(Me)(AP) are consistent with the VO(2+) description. The V-O(iminosemiquinonate) (trans to the V═O) lengths, 2.1324(19) in 1•3/2MeOH and 2.083(2) Å in 3•1/2 L(Me)(AP), are expectedly ∼0.20 Å longer due to the trans influence of the V═O bond. Because of the stronger affinity of the paramagnetic VO(2+) ion to the L(H)(IS)(•-) or L(Me)(IS)(•-), the V-N(iminosemiquinonate) lengths, 1.908(2) and 1.921(2) Å, respectively, in 1•3/2MeOH and 3•1/2 L(Me)(AP), are unexpectedly shorter. Density functional theory (DFT) calculations using B3LYP, B3PW91, and PBE1PBE functionals on 1 and 2 have established that the closed shell singlet (CSS) solutions (VO(3+)-amidophenolato (L(R)(AP)(2-)) coordination) of these complexes are unstable with respect to triplet perturbations. But BS (1,1) M(s) = 0 (VO(2+)-iminobenzosemiquinonate anion radical (L(R)(IS)(•-)) coordination) solutions of these species are stable and reproduce the experimental bond parameters well. Spin density distributions of one electron oxidized cations are consistent with the [(L(-))(VO(2+))(L(R)(IQ))](+) descriptions [VO(2+)-o-iminobenzoquinone (L(R)(IQ)) coordination], and one electron reduced anions are consistent with the [(L(•2-))(VO(3+))(L(R)(AP)(2-))](-) descriptions [VO(3+)-amidophenolato (L(R)(AP)(2-)) coordination], incorporating the diimine anion radical (L(1)(•2-)) or azo anion radical (L(2)(3-)). Although, cations and anions are not isolable, but electro-and spectro-electrochemical experiments have shown that 3(+) and 3(-) ions are more stable than 1(+), 2(+) and 1(-), 2(-) ions. In all cases, the reductions occur with simultaneous two electron transfer, may be due to formation of coupled diimine/azo anion radical-VO(2+) species as in [(L(•2-))(VO(2+))(L(R)(AP)(2-))](2-).
Collapse
Affiliation(s)
- Amit Saha Roy
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-103, India
| | | | | | | |
Collapse
|
85
|
Khusniyarov MM, Bill E, Weyhermüller T, Bothe E, Wieghardt K. Hidden Noninnocence: Theoretical and Experimental Evidence for Redox Activity of a β-Diketiminate(1−) Ligand. Angew Chem Int Ed Engl 2011; 50:1652-5. [DOI: 10.1002/anie.201005953] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Indexed: 11/07/2022]
|
86
|
Khusniyarov MM, Bill E, Weyhermüller T, Bothe E, Wieghardt K. Hidden Noninnocence: Theoretical and Experimental Evidence for Redox Activity of a β-Diketiminate(1−) Ligand. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201005953] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
87
|
Wolf R, Ehlers AW, Khusniyarov MM, Hartl F, de Bruin B, Long GJ, Grandjean F, Schappacher FM, Pöttgen R, Slootweg JC, Lutz M, Spek AL, Lammertsma K. Homoleptic Diphosphacyclobutadiene Complexes [M(η4-P2C2R2)2]x− (M=Fe, Co; x=0, 1). Chemistry 2010; 16:14322-34. [DOI: 10.1002/chem.201001913] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
88
|
Dick AK, Frey AS, Gardiner MG, Hilder M, James AN, Junk PC, Powanosorn S, Skelton BW, Wang J, White AH. Synthesis and reactivity of trans-N,N′-dimethyl-meso-octaalkylporphyrinogen Sm(II), Eu(II) and Yb(II) complexes: Metal-based influences on the reduction of t-butyl-1,4-diazabuta-1,3-diene. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
89
|
Driller KM, Prateeptongkum S, Jackstell R, Beller M. A General and Selective Iron-Catalyzed Aminocarbonylation of Alkynes: Synthesis of Acryl- and Cinnamides. Angew Chem Int Ed Engl 2010; 50:537-41. [DOI: 10.1002/anie.201005823] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
90
|
Driller KM, Prateeptongkum S, Jackstell R, Beller M. Eine allgemeine und selektive Eisen-katalysierte Aminocarbonylierung von Alkinen: Synthese von Acryl- und Zimtsäureamiden. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005823] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
91
|
Roy AS, Biswas MK, Weyhermüller T, Ghosh P. Stereoselective non-equivalent bis-diimine coordination to Co(II) ion: Structure, luminescence and density functional theory calculations. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
92
|
Irwin M, Jenkins RK, Denning MS, Krämer T, Grandjean F, Long GJ, Herchel R, McGrady JE, Goicoechea JM. Experimental and Computational Study of the Structural and Electronic Properties of FeII(2,2′-bipyridine)(mes)2 and [FeII(2,2′-bipyridine)(mes)2]−, a Complex Containing a 2,2′-Bipyridyl Radical Anion. Inorg Chem 2010; 49:6160-71. [DOI: 10.1021/ic100817s] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mark Irwin
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Rhiannon K. Jenkins
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Mark S. Denning
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Tobias Krämer
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Fernande Grandjean
- Department of Physics, B5, University of Liège, B-4000, Sart-Tilman, Belgium
| | - Gary J. Long
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri, Rolla, Missouri 65409-0010
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, tr. 17. Listopadu 12, 77146 Olomouc, Czech Republic
| | - John E. McGrady
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Jose M. Goicoechea
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| |
Collapse
|
93
|
The 1,4-diazabutadiene/1,2-enediamido non-innocent ligand system in the formation of iridaheteroaromatic compounds: Spectroelectrochemistry and electronic structure. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.11.042] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
94
|
Smith KM, McNeil WS, Abd-El-Aziz AS. Organometallic-Mediated Radical Polymerization: Developing Well-Defined Complexes for Reversible Transition Metal-Alkyl Bond Homolysis. MACROMOL CHEM PHYS 2010; 211:10-16. [DOI: 10.1002/macp.200900581] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
95
|
Paraskevopoulou P, Ai L, Wang Q, Pinnapareddy D, Acharyya R, Dinda R, Das P, Çelenligil-Çetin R, Floros G, Sanakis Y, Choudhury A, Rath NP, Stavropoulos P. Synthesis and characterization of a series of structurally and electronically diverse Fe(II) complexes featuring a family of triphenylamido-amine ligands. Inorg Chem 2010; 49:108-22. [PMID: 19950956 PMCID: PMC2823121 DOI: 10.1021/ic9015838] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A family of triphenylamido-amine ligands of the general stoichiometry L(x)H(3) = [R-NH-(2-C(6)H(4))](3)N (R = 4-t-BuPh (L(1)H(3)), 3,5-t-Bu(2)Ph (L(2)H(3)), 3,5-(CF(3))(2)Ph (L(3)H(3)), CO-t-Bu (L(4)H(3)), 3,5-Cl(2)Ph (L(5)H(3)), COPh (L(6)H(3)), CO-i-Pr (L(7)H(3)), COCF(3) (L(8)H(3)), and i-Pr (L(9)H(3))) has been synthesized and characterized, featuring a rigid triphenylamido-amine scaffold and an array of stereoelectronically diverse aryl, acyl, and alkyl substituents (R). These ligands are deprotonated by potassium hydride in THF or DMA and reacted with anhydrous FeCl(2) to afford a series of ferrous complexes, exhibiting stoichiometric variation and structural complexity. The prevalent [(L(x))Fe(II)-solv](-) structures (L(x) = L(1), L(2), L(3), L(5), solv = THF; L(x) = L(8), solv = DMA; L(x) = L(6), L(8), solv = MeCN) reveal a distorted trigonal bipyramidal geometry, featuring ligand-derived [N(3,amido)N(amine)] coordination and solvent attachment trans to the N(amine) atom. Specifically for [(L(8))Fe(II)-DMA](-), a N(amido) residue is coordinated as the corresponding N(imino) moiety (Fe-N(Ar) horizontal lineC(CF(3))-O(-)). In contrast, compounds [(L(4))Fe(II)](-), [(L(6))(2)Fe(II)(2)](2-), [K(L(7))(2)Fe(II)(2)](2)(2-), and [K(L(9))Fe](2) are all solvent-free in their coordination sphere and exhibit four-coordinate geometries of significant diversity. In particular, [(L(4))Fe(II)](-) demonstrates coordination of one amidato residue via the O-atom end (Fe-O-C(t-Bu) horizontal lineN(Ar)). Furthermore, [(L(6))(2)Fe(II)(2)](2-) and [K(L(7))(2)Fe(II)(2)](2)(2-) are similar structures exhibiting bridging amidato residues (Fe-N(Ar)-C(R) horizontal lineO-Fe) in dimeric structural units. Finally, the structure of [K(L(9))Fe](2) is the only example featuring a minimal [N(3,amido)N(amine)] coordination sphere around each Fe(II) site. All compounds have been characterized by a variety of physicochemical techniques, including Mossbauer spectroscopy and electrochemistry, to reveal electronic attributes that are responsible for a range of Fe(II)/Fe(III) redox potentials exceeding 1.0 V.
Collapse
Affiliation(s)
- Patrina Paraskevopoulou
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Athens, Panepistimioupoli Zographou 15771, Athens, Greece
| | - Lin Ai
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Qiuwen Wang
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | - Devender Pinnapareddy
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | - Rama Acharyya
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | - Rupam Dinda
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | - Purak Das
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | | | - Georgios Floros
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Athens, Panepistimioupoli Zographou 15771, Athens, Greece
| | - Yiannis Sanakis
- Institute of Materials Science, NCSR “Demokritos”, Ag. Paraskevi 15310, Greece
| | - Amitava Choudhury
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, St. Louis, Missouri 63121
| | - Pericles Stavropoulos
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409
| |
Collapse
|
96
|
Wolf R, Ghavtadze N, Weber K, Schnöckelborg EM, de Bruin B, Ehlers AW, Lammertsma K. P–C dichotomy: divergent iron(−I)-mediated alkyne and phosphaalkyne cycloligomerisations. Dalton Trans 2010; 39:1453-6. [DOI: 10.1039/b923663p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
97
|
Tejel C, del Río M, Ciriano M, Reijerse E, Hartl F, Záliš S, Hetterscheid D, Tsichlis i Spithas N, de Bruin B. Ligand-Centred Reactivity of Bis(picolyl)amine Iridium: Sequential Deprotonation, Oxidation and Oxygenation of a “Non-Innocent” Ligand. Chemistry 2009; 15:11878-89. [DOI: 10.1002/chem.200901017] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
98
|
Germain ME, Temprado M, Castonguay A, Kryatova OP, Rybak-Akimova EV, Curley JJ, Mendiratta A, Tsai YC, Cummins CC, Prabhakar R, McDonough JE, Hoff CD. Coordination-Mode Control of Bound Nitrile Radical Complex Reactivity: Intercepting End-on Nitrile−Mo(III) Radicals at Low Temperature. J Am Chem Soc 2009; 131:15412-23. [PMID: 19919164 DOI: 10.1021/ja905849a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Meaghan E. Germain
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Manuel Temprado
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Annie Castonguay
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Olga P. Kryatova
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Elena V. Rybak-Akimova
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - John J. Curley
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Arjun Mendiratta
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Yi-Chou Tsai
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Christopher C. Cummins
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Rajeev Prabhakar
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - James E. McDonough
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| | - Carl D. Hoff
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, and Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146
| |
Collapse
|
99
|
Lu CC, Weyhermüller T, Bill E, Wieghardt K. Accessing the Different Redox States of α-Iminopyridines within Cobalt Complexes. Inorg Chem 2009; 48:6055-64. [DOI: 10.1021/ic9004328] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Connie C. Lu
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Karl Wieghardt
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| |
Collapse
|