51
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Piskunov AV, Maleeva AV, Bogomyakov AS, Fukin GK. Synthesis, structure, and magnetic properties of magnesium bis-3,6-di-tert-butyl-о-benzosemiquinonate complexes with N-donor ligands. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1933-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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52
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Kumar V, Shova S, Maurel V, Novitchi G, Train C. Crystallographic Insights into the Synthesis and Magnetic Properties of Oxoverdazyl Radicals Functionalized by Benzoic Acid. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700950] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Varun Kumar
- Univ. Grenoble Alpes CNRS LNCMI 38000 Grenoble France
| | - Sergiu Shova
- LNCMI “Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A 700487 Iasi Romania
| | - Vincent Maurel
- Univ. Grenoble Alpes CEA CNRS INAC SyMMES 38000 Grenoble France
| | | | - Cyrille Train
- Univ. Grenoble Alpes CEA CNRS INAC SyMMES 38000 Grenoble France
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53
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Sanz CA, McKay ZR, MacLean SWC, Patrick BO, Hicks RG. Synthesis and redox reactions of bis(verdazyl)palladium complexes. Dalton Trans 2017; 46:12636-12644. [PMID: 28913533 DOI: 10.1039/c7dt02646c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The synthesis and ligand-centered redox chemistry of palladium complexes bearing two potentially bidentate verdazyl ligands is explored. Reaction of 1,5-diisopropyl-3-pyridin-2-yl-6-oxoverdazyl radical 1 with Pd(NCMe)4·2BF4 gives a complex containing two coordinated verdazyl radicals. The structure of this complex consists of one verdazyl bound to Pd in a bidentate mode and the second verdazyl bound in a monodentate fashion through the pyridine substituent; the fourth coordination site is occupied by a solvent molecule (acetonitrile (3) or dimethyl sulfoxide (4)). Two-electron reduction of this complex with decamethylferrocene affords a bis(verdazyl) palladium complex (5) in which both verdazyls have been reduced to their anionic state and are both bound to Pd in bidentate manner. Complex 5 can be independently synthesized by a redox reaction between 1 and Pd2(dba)3. Reduced complex 5 can be re-oxidized to 3 or 4 with AgBF4; in contrast, oxidation with PhICl2 leads to ligand dissociation, ultimately giving radical 1 and a mono(verdazyl)dichloropalladium complex 2. One-electron oxidation using PhICl2 produces a formally "mixed valent" (in ligand) bis(verdazyl)chloropalladium complex (6) with one bidentate verdazyl anion ligand and one monodentate (pyridine-bound) verdazyl radical. Attempted protonation of the verdazyl ligands in complex 5 leads to complete ligand dissociation and protonation of both the tetrazine and pyridine moieties; deprotonation regenerates 5. Subsequent air oxidation of the tetrazane/pyridinium cation (formed as a tetrachloropalladate salt) leads to re-coordination of the verdazyl ligands to give 6 initially, but ultimately produces a combination of free radical 1 and 2.
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Affiliation(s)
- Corey A Sanz
- Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria, B.C. V8W3V6, Canada.
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54
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Sarkar S, Goswami T, Bhattacharya D, Misra A. On the performance of generalized valence bond theory in predicting magnetic exchange coupling constant in organic diradicals: A comparison with Hartree-Fock theory. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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55
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Kolanji K, Ravat P, Bogomyakov AS, Ovcharenko VI, Schollmeyer D, Baumgarten M. Mixed Phenyl and Thiophene Oligomers for Bridging Nitronyl Nitroxides. J Org Chem 2017; 82:7764-7773. [PMID: 28664730 DOI: 10.1021/acs.joc.7b00435] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of four nitronyl nitroxide (NN) biradicals is described which are conjugatively linked through p-ter-phenyl (PPP), ter-thiophene (TTT) and alternating phenylene (P) and thiophene (T) units as PTP and TPT. We first utilized Suzuki and Stille coupling reactions through protection and deprotection protocols to synthesize these (NN) biradicals. Single crystals were efficiently grown for radical precursors of 3, 5, 6, PPP-NNSi, PTP-NNSi, and final biradicals of TTT-NN, TPT-NN, and PPP-NN, whose structures and molecular packing were examined by X-ray diffraction studies. As a result, much smaller torsions between the NN and thiophene units (∼10°) in TTT-NN and TPT-NN than for NN and phenyl units (∼29°) in PPP-NN were observed due to smaller hindrance for a five vs a six membered ring. All four biradicals TTT-NN, TPT-NN, PTP-NN, and PPP-NN were investigated by EPR and optical spectroscopy combined with DFT calculations. The magnetic susceptibility was studied by SQUID measurements for TTT-NN and TPT-NN. The intramolecular exchange interactions for TPT-NN and TTT-NN were found in good agreement with the ones calculated by broken symmetry DFT calculations.
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Affiliation(s)
- Kubandiran Kolanji
- Max Planck Institute for Polymer Research, Ackermannweg 10 , 55128 Mainz, Germany
| | - Prince Ravat
- Max Planck Institute for Polymer Research, Ackermannweg 10 , 55128 Mainz, Germany
| | - Artem S Bogomyakov
- International Tomography Center, Siberian Branch, Russian Academy of Sciences , Institutskaya Str. 3a, 630090 Novosibirsk, Russian Federation
| | - Victor I Ovcharenko
- International Tomography Center, Siberian Branch, Russian Academy of Sciences , Institutskaya Str. 3a, 630090 Novosibirsk, Russian Federation
| | - Dieter Schollmeyer
- Institut fuer Organische Chemie, Universitaet Mainz , Duesbergweg 10-14, 55099, Mainz, Germany
| | - Martin Baumgarten
- Max Planck Institute for Polymer Research, Ackermannweg 10 , 55128 Mainz, Germany
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56
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Eusterwiemann S, Doerenkamp C, Dresselhaus T, Janka O, de Oliveira M, Daniliuc CG, Eckert H, Neugebauer J, Pöttgen R, Studer A. Strong intermolecular antiferromagnetic verdazyl-verdazyl coupling in the solid state. Phys Chem Chem Phys 2017; 19:15681-15685. [PMID: 28604873 DOI: 10.1039/c7cp02950k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong magnetic couplings are generally observed intramolecularly in organic diradicals or in systems in which they are promoted by crystal engineering strategies involving, for example, transition metal ligation. We herein present a strong intermolecularly coupling verdazyl radical in the solid state without the use of such design strategies. The crystal structure of an acetylene-substituted verdazyl radical shows a unique antiparallel face-to-face orientation of the neighboring verdazyl molecules along with verdazyl-acetylene interactions giving rise to an alternating antiferromagnetic Heisenberg chain. Single crystal structural data at 80, 100, 173, and 223 K show that one of the π-stacking distances depends on temperature, while heat capacity data indicate the absence of a phase transition. Based on this structural input, broken symmetry DFT calculations predict a change from an alternating linear Heisenberg chain with two comparable coupling constants J1 and J2 at higher temperatures towards dominant pair interactions at lower temperatures. The predicted antiferromagnetic coupling is confirmed experimentally by magnetic susceptibility, solid-state EPR and NMR spectroscopic results.
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Affiliation(s)
- S Eusterwiemann
- Institute of Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany.
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57
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Eusterwiemann S, Dresselhaus T, Doerenkamp C, Janka O, Niehaus O, Massolle A, Daniliuc CG, Eckert H, Pöttgen R, Neugebauer J, Studer A. Cooperative Magnetism in Crystalline N-Aryl-Substituted Verdazyl Radicals: First-Principles Predictions and Experimental Results. Chemistry 2017; 23:6069-6082. [PMID: 28317202 DOI: 10.1002/chem.201700988] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Indexed: 11/10/2022]
Abstract
We report on a series of eight diaryl-6-oxo-verdazyl radicals containing a tert-butyl group at the C(3) position with regard to their crystal structure and magnetic properties by means of magnetic susceptibility measurements in combination with quantum chemical calculations using a first-principles bottom-up approach. The latter method allows for a qualitative prediction and detailed analysis of the correlation between the solid-state architecture and magnetic properties. Although the perturbation in the molecular structure by varying the substituent on the N-aryl ring may appear small, the effects upon the structural parameters controlling intermolecular magnetic coupling interactions are strong, resulting in a wide spectrum of cooperative magnetic behavior. The non-substituted 1,5-diphenyl-tert-butyl-6-oxo-verdazyl radical features a ferromagnetic one-dimensional spin ladder type magnetic network-an extremely rarely observed phenomenon for verdazyl radicals. By varying substituents at the phenyl group, different non-isostructural compounds were obtained with widely different magnetic motifs ranging from linear and zigzag one-dimensional chains to potentially two-dimensional networks, from which we predict magnetic susceptibility data that are in qualitative agreement with experiments and reveal a large sensitivity to packing effects of the molecules. The present study advances the fundamental understanding between solid-state structure and magnetism in organically based radical systems.
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Affiliation(s)
- Steffen Eusterwiemann
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Thomas Dresselhaus
- Organisch-Chemisches Institut and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Carsten Doerenkamp
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149, Münster, Germany
| | - Oliver Janka
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149, Münster, Germany
| | - Oliver Niehaus
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149, Münster, Germany
| | - Anja Massolle
- Organisch-Chemisches Institut and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Hellmut Eckert
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149, Münster, Germany.,Present address: Instituto de Física em Sao Carlos, Universidade de Sao Paulo, Avenida Trabalhador Saocarlense 400, Sao Carlos, SP, 13566-590, Brazil
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149, Münster, Germany
| | - Johannes Neugebauer
- Organisch-Chemisches Institut and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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58
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Molecular magnetism, quo vadis? A historical perspective from a coordination chemist viewpoint☆. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.03.004] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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59
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Tanaseichuk BS, Tomilin OB, Pryanichnikova MK, Tsebulaeva YV, Boyarkina OV. Reaction of 1,5-diphenyl-3-arylverdazyles with СН-acids. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428017050189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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60
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Barone V, Cacelli I, Ferretti A, Prampolini G. Magnetic gaps in organic tri-radicals: From a simple model to accurate estimates. J Chem Phys 2017; 146:104103. [DOI: 10.1063/1.4977598] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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61
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Trinquier G, Malrieu JP. Spreading out spin density in polyphenalenyl radicals. Phys Chem Chem Phys 2017; 19:27623-27642. [DOI: 10.1039/c7cp04930g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Properly-designed monoradicals built from polycondensed phenalene units can enforce flattening of spin distributions.
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Affiliation(s)
- Georges Trinquier
- Laboratoire de Chimie et Physique Quantiques (CNRS-UMR5626)
- IRSAMC
- Université Paul-Sabatier (Toulouse III)
- 31062 Toulouse Cedex
- France
| | - Jean-Paul Malrieu
- Laboratoire de Chimie et Physique Quantiques (CNRS-UMR5626)
- IRSAMC
- Université Paul-Sabatier (Toulouse III)
- 31062 Toulouse Cedex
- France
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62
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Piskunov AV, Maleeva AV, Fukin GK, Cherkasov VK, Bogomyakov AS. Pentacoordinated bis- o -benzosemiquinonato zinc complexes with different N-ligands: Structure and magnetic properties. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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63
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Novitchi G, Shova S, Lan Y, Wernsdorfer W, Train C. Verdazyl Radical, a Building Block for a Six-Spin-Center 2p–3d–4f Single-Molecule Magnet. Inorg Chem 2016; 55:12122-12125. [DOI: 10.1021/acs.inorgchem.6b02380] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ghénadie Novitchi
- Laboratoire National
des Champs Magnétiques Intenses, UPR CNRS 3228, Université Grenoble-Alpes, B.P. 166, 38042 Grenoble Cedex
9, France
| | - Sergiu Shova
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Yanhua Lan
- Institut Néel, UPR CNRS 2940, Université Grenoble-Alpes, B.P. 166, 38042 Grenoble Cedex 9, France
| | - Wolfgang Wernsdorfer
- Institut Néel, UPR CNRS 2940, Université Grenoble-Alpes, B.P. 166, 38042 Grenoble Cedex 9, France
| | - Cyrille Train
- Laboratoire National
des Champs Magnétiques Intenses, UPR CNRS 3228, Université Grenoble-Alpes, B.P. 166, 38042 Grenoble Cedex
9, France
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64
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Dresselhaus T, Eusterwiemann S, Matuschek DR, Daniliuc CG, Janka O, Pöttgen R, Studer A, Neugebauer J. Black-box determination of temperature-dependent susceptibilities for crystalline organic radicals with complex magnetic topologies. Phys Chem Chem Phys 2016; 18:28262-28273. [PMID: 27711591 DOI: 10.1039/c6cp05875b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In all but the simplest crystal structures, the identification of all relevant interactions between magnetic sites as well as the setup of magnetic model spaces, which are necessary for modeling macroscopic magnetism, are tedious and error-prone tasks. Here, we present a procedure to generate magnetic susceptibility versus temperature curves using only a crystal structure as input. The procedure, which is based on the first-principles bottom-up approach [Deumal et al., J. Phys. Chem. A, 2002, 106, 1299], is designed in a way to require as little user interference as possible. We employ quantum chemical calculations to parametrize a Heisenberg Hamiltonian, which is set up and diagonalized for different magnetic model spaces to ensure convergence of the model. We apply the procedure to several 6-oxo-verdazyl radical structures, including newly synthesized compounds, and compare the results to data we obtained from magnetic susceptibility measurements as well as published data to further benchmark our procedure. Furthermore, the different impact of certain dominating coupling constants is systematically analyzed.
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Affiliation(s)
- Thomas Dresselhaus
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany. and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Steffen Eusterwiemann
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - David R Matuschek
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Oliver Janka
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
| | - Johannes Neugebauer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany. and Center for Multiscale Theory and Computation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
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65
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Wingate AJ, Boudouris BW. Recent advances in the syntheses of radical-containing macromolecules. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28088] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Adam J. Wingate
- School of Chemical Engineering; Purdue University; West Lafayette Indiana 47907
| | - Bryan W. Boudouris
- School of Chemical Engineering; Purdue University; West Lafayette Indiana 47907
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66
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Schorn W, Grosse-Hagenbrock D, Oelkers B, Sundermeyer J. Formazanido complexes of heavier group 13 elements aluminium, gallium, and indium. Dalton Trans 2016; 45:1201-7. [DOI: 10.1039/c5dt03906a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The straightforward synthesis and detailed characterization both in solution and in the solid state of novel triphenylformazanido complexes of group 13 elements Al, Ga, In is reported.
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Affiliation(s)
- W. Schorn
- Fachbereich Chemie der Philipps-Universität Marburg and Materials Science Center
- 35307 Marburg
- Germany
| | - D. Grosse-Hagenbrock
- Fachbereich Chemie der Philipps-Universität Marburg and Materials Science Center
- 35307 Marburg
- Germany
| | - B. Oelkers
- Fachbereich Chemie der Philipps-Universität Marburg and Materials Science Center
- 35307 Marburg
- Germany
| | - J. Sundermeyer
- Fachbereich Chemie der Philipps-Universität Marburg and Materials Science Center
- 35307 Marburg
- Germany
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67
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Areephong J, Mattson KM, Treat NJ, Poelma SO, Kramer JW, Sprafke HA, Latimer AA, Read de Alaniz J, Hawker CJ. Triazine-mediated controlled radical polymerization: new unimolecular initiators. Polym Chem 2016. [DOI: 10.1039/c5py01563d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Triazine-based unimolecular initiators are shown to mediate the controlled radical polymerization of several monomer classes, yielding polymers with low dispersities, targeted molecular weights, and active chain ends.
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Affiliation(s)
- J. Areephong
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
| | - K. M. Mattson
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Department of Chemistry and Biochemistry
| | - N. J. Treat
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Materials Department
| | - S. O. Poelma
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Department of Chemistry and Biochemistry
| | | | - H. A. Sprafke
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
| | - A. A. Latimer
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Department of Chemistry and Biochemistry
| | - J. Read de Alaniz
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Department of Chemistry and Biochemistry
| | - C. J. Hawker
- Materials Research Laboratory
- University of California
- Santa Barbara
- USA
- Department of Chemistry and Biochemistry
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68
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Constantinides CP, Koutentis PA. Stable N- and N/S-Rich Heterocyclic Radicals. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2016.03.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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69
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70
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Di Piazza E, Merhi A, Norel L, Choua S, Turek P, Rigaut S. Ruthenium Carbon-Rich Complexes as Redox Switchable Metal Coupling Units. Inorg Chem 2015; 54:6347-55. [DOI: 10.1021/acs.inorgchem.5b00667] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Emmanuel Di Piazza
- UMR 6226 CNRS—Université de Rennes 1,
Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, F-35042, Rennes Cedex, France
| | - Areej Merhi
- UMR 6226 CNRS—Université de Rennes 1,
Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, F-35042, Rennes Cedex, France
| | - Lucie Norel
- UMR 6226 CNRS—Université de Rennes 1,
Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, F-35042, Rennes Cedex, France
| | - Sylvie Choua
- UMR 7177 CNRS—Université de Strasbourg, Institut de
Chimie, 1 rue Blaise Pascal, BP 296 R8, F-67008 Strasbourg
Cedex, France
| | - Philippe Turek
- UMR 7177 CNRS—Université de Strasbourg, Institut de
Chimie, 1 rue Blaise Pascal, BP 296 R8, F-67008 Strasbourg
Cedex, France
| | - Stéphane Rigaut
- UMR 6226 CNRS—Université de Rennes 1,
Institut des Sciences Chimiques de Rennes, Campus de Beaulieu, F-35042, Rennes Cedex, France
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71
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Piskunov AV, Ershova IV, Bogomyakov AS, Starikov AG, Fukin GK, Cherkasov VK. Indirect Magnetic Exchange between o-Iminosemiquinonate Ligands Controlled by Apical Substituent in Pentacoordinated Gallium(III) Complexes. Inorg Chem 2015; 54:6090-9. [DOI: 10.1021/acs.inorgchem.5b00520] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
| | - Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a Institutskaya str., 630090 Novosibirsk, Russian Federation
| | - Andrey G. Starikov
- Southern Scientific Center of Russian Academy of Sciences, 41 Chehova Ave., 344006 Rostov on Don, Russian Federation
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
| | - Vladimir K. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, Nizhny
Novgorod 603950, Russian Federation
- Nizhny Novgorod State University, Gagarina ave. 23, Nizhny
Novgorod 603950, Russian Federation
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Matuschek D, Eusterwiemann S, Stegemann L, Doerenkamp C, Wibbeling B, Daniliuc CG, Doltsinis NL, Strassert CA, Eckert H, Studer A. Profluorescent verdazyl radicals - synthesis and characterization. Chem Sci 2015; 6:4712-4716. [PMID: 29142709 PMCID: PMC5667500 DOI: 10.1039/c5sc00724k] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 05/26/2015] [Indexed: 12/01/2022] Open
Abstract
The synthesis and characterization of various 6-oxo-verdazyl radicals and their diamagnetic styryl radical trapping products are presented.
The synthesis and characterization of various 6-oxo-verdazyl radicals and their diamagnetic styryl radical trapping products are presented. It is shown that styryl radical trapping products derived from N-phenyl verdazyls show fluorescence whereas the N-methyl congeners are non-fluorescent. In the parent N-phenyl verdazyls fluorescence is fully quenched which renders these compounds highly valuable profluorescent radical probes.
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Affiliation(s)
- David Matuschek
- Institute of Organic Chemistry , Westfälische Wilhelms-Universität Münster , Corrensstrasse 40 , 48149 Münster , Germany . ; Tel: +49 (0)251-83-33291
| | - Steffen Eusterwiemann
- Institute of Organic Chemistry , Westfälische Wilhelms-Universität Münster , Corrensstrasse 40 , 48149 Münster , Germany . ; Tel: +49 (0)251-83-33291
| | - Linda Stegemann
- Institute of Physics and Center for Nanotechnology , Westfälische Wilhelms-Universität Münster , Heisenbergstrasse 11 , 48149 Münster , Germany .
| | - Carsten Doerenkamp
- Institut für Physikalische Chemie , Westfälische Wilhelms-Universität Münster , Corrensstrasse 28/30 , 48149 Münster , Germany .
| | - Birgit Wibbeling
- Institute of Organic Chemistry , Westfälische Wilhelms-Universität Münster , Corrensstrasse 40 , 48149 Münster , Germany . ; Tel: +49 (0)251-83-33291
| | - Constantin G Daniliuc
- Institute of Organic Chemistry , Westfälische Wilhelms-Universität Münster , Corrensstrasse 40 , 48149 Münster , Germany . ; Tel: +49 (0)251-83-33291
| | - Nikos L Doltsinis
- Institut für Festkörpertheorie and Center for Multiscale Theory & Computation , Westfälische Wilhelms-Universität Münster , Wilhelm-Klemm-Straße 10 , 48149 Münster , Germany .
| | - Cristian A Strassert
- Institute of Physics and Center for Nanotechnology , Westfälische Wilhelms-Universität Münster , Heisenbergstrasse 11 , 48149 Münster , Germany .
| | - Hellmut Eckert
- Institut für Physikalische Chemie , Westfälische Wilhelms-Universität Münster , Corrensstrasse 28/30 , 48149 Münster , Germany . .,Instituto da Física em Sao Carlos , Universidade de Sao Paulo , Avenida Trabalhador Saocarlense 400 , Sao Carlos , SP 13590 , Brazil
| | - Armido Studer
- Institute of Organic Chemistry , Westfälische Wilhelms-Universität Münster , Corrensstrasse 40 , 48149 Münster , Germany . ; Tel: +49 (0)251-83-33291
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75
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Weinert C, Wezisla B, Lindner J, Vöhringer P. Ultrafast primary processes of the stable neutral organic radical, 1,3,5-triphenylverdazyl, in liquid solution. Phys Chem Chem Phys 2015; 17:13659-71. [DOI: 10.1039/c5cp01383f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Femtosecond pump–probe spectroscopy reveals ultrafast photochemical processes of a stable neutral organic radical in solution.
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Affiliation(s)
- Christoph Weinert
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Boris Wezisla
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Jörg Lindner
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Peter Vöhringer
- Lehrstuhl für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
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76
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Yang H, Chen M, Song X, Bu Y. Structural fluctuation governed dynamic diradical character in pentacene. Phys Chem Chem Phys 2015; 17:13904-14. [DOI: 10.1039/c5cp00902b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Energy field-induced structural fluctuation can not only induce potential diradical character but also modulate its dynamical behavior in pentacene.
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Affiliation(s)
- Hongfang Yang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Mengzhen Chen
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Xinyu Song
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- P. R. China
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78
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Fumanal M, Vela S, Ribas-Ariño J, Novoa JJ. On the Importance of Thermal Effects and Crystalline Disorder in the Magnetism of Benzotriazinyl-Derived Organic Radicals. Chem Asian J 2014; 9:3612-22. [DOI: 10.1002/asia.201402871] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/25/2014] [Indexed: 11/10/2022]
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79
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Ko KC, Park YG, Cho D, Lee JY. Simple but Useful Scheme toward Understanding of Intramolecular Magnetic Interactions: Benzene-Bridged Oxoverdazyl Diradicals. J Phys Chem A 2014; 118:9596-606. [DOI: 10.1021/jp5072007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyoung Chul Ko
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Young Geun Park
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Daeheum Cho
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Jin Yong Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
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80
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Ovcharenko V, Kuznetsova O, Fursova E, Romanenko G, Polushkin A, Sagdeev R. Redox-Induced Change in the Ligand Coordination Mode. Inorg Chem 2014; 53:10033-5. [DOI: 10.1021/ic501787m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Victor Ovcharenko
- International
Tomography Centre, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
| | - Olga Kuznetsova
- International
Tomography Centre, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
| | - Elena Fursova
- International
Tomography Centre, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
| | - Galina Romanenko
- International
Tomography Centre, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
| | - Alexey Polushkin
- International
Tomography Centre, Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation
| | - Renad Sagdeev
- Kazan (Volga Region) Federal University, 420008 Kazan, Russian Federation
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81
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Vela S, Sopena A, Ribas-Arino J, Novoa JJ, Deumal M. Elucidating the 2D Magnetic Topology of the ‘Metal-Radical’ TTTA⋅Cu(hfac)2System. Chemistry 2014; 20:7083-90. [DOI: 10.1002/chem.201304712] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Indexed: 11/08/2022]
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82
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Mayhall NJ, Goldey M, Head-Gordon M. A Quasidegenerate Second-Order Perturbation Theory Approximation to RAS-nSF for Excited States and Strong Correlations. J Chem Theory Comput 2014; 10:589-99. [DOI: 10.1021/ct400898p] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicholas J. Mayhall
- Kenneth S. Pitzer Center
for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Matthew Goldey
- Kenneth S. Pitzer Center
for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Martin Head-Gordon
- Kenneth S. Pitzer Center
for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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83
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Merhi A, Roisnel T, Rigaut S, Train C, Norel L. Ferromagnetic intermolecular exchange interaction in ethynyl-verdazyl radical crystals. CrystEngComm 2014. [DOI: 10.1039/c4ce01437e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The newly synthesized p-ethynylphenyl-oxoverdazyl radical shows unusual slipped 1D chains held together by π–π interactions leading to ferromagnetic exchange interactions.
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Affiliation(s)
- Areej Merhi
- UMR 6226 CNRS - Université de Rennes 1
- Institut des Sciences Chimiques de Rennes
- Campus de Beaulieu
- F-35042 Rennes Cedex, France
| | - Thierry Roisnel
- UMR 6226 CNRS - Université de Rennes 1
- Institut des Sciences Chimiques de Rennes
- Campus de Beaulieu
- F-35042 Rennes Cedex, France
| | - Stéphane Rigaut
- UMR 6226 CNRS - Université de Rennes 1
- Institut des Sciences Chimiques de Rennes
- Campus de Beaulieu
- F-35042 Rennes Cedex, France
| | | | - Lucie Norel
- UMR 6226 CNRS - Université de Rennes 1
- Institut des Sciences Chimiques de Rennes
- Campus de Beaulieu
- F-35042 Rennes Cedex, France
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84
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Price JT, Paquette JA, Harrison CS, Bauld R, Fanchini G, Gilroy JB. 6-Oxoverdazyl radical polymers with tunable electrochemical properties. Polym Chem 2014. [DOI: 10.1039/c4py00829d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
6-Oxoverdazyl radical polymers were synthesized and their tunable redox properties studied in solution and the solid-state.
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Affiliation(s)
- Jacquelyn T. Price
- Department of Chemistry
- The University of Western Ontario
- London N6A 5B7, Canada
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
| | - Joseph A. Paquette
- Department of Chemistry
- The University of Western Ontario
- London N6A 5B7, Canada
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
| | - Christopher S. Harrison
- Department of Chemistry
- The University of Western Ontario
- London N6A 5B7, Canada
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
| | - Reg Bauld
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
- London N6A 5B7, Canada
- Department of Physics and Astronomy
- The University of Western Ontario
| | - Giovanni Fanchini
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
- London N6A 5B7, Canada
- Department of Physics and Astronomy
- The University of Western Ontario
| | - Joe B. Gilroy
- Department of Chemistry
- The University of Western Ontario
- London N6A 5B7, Canada
- The Centre for Advanced Materials and Biomaterials Research (CAMBR)
- The University of Western Ontario
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85
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Kamebuchi H, Okubo M, Okazawa A, Enomoto M, Harada J, Ogawa K, Maruta G, Takeda S, Kojima N, Train C, Verdaguer M. A tricky water molecule coordinated to a verdazyl radical–iron(ii) complex: a multitechnique approach. Phys Chem Chem Phys 2014; 16:9086-95. [DOI: 10.1039/c4cp00310a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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86
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Lipunova GN, Fedorchenko TG, Chupakhin ON. Verdazyls: synthesis, properties, application. RUSSIAN CHEMICAL REVIEWS 2013. [DOI: 10.1070/rc2013v082n08abeh004341] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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87
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Jasiński M, Gerding JS, Jankowiak A, Gębicki K, Romański J, Jastrzębska K, Sivaramamoorthy A, Mason K, Evans DH, Celeda M, Kaszyński P. Functional Group Transformations in Derivatives of 6-Oxoverdazyl. J Org Chem 2013; 78:7445-54. [DOI: 10.1021/jo400843y] [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)
- Marcin Jasiński
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
| | - Jason S. Gerding
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Aleksandra Jankowiak
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Krzysztof Gębicki
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
| | - Jarosław Romański
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
| | - Katarzyna Jastrzębska
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
| | - Ajan Sivaramamoorthy
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Kristein Mason
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Donavan H. Evans
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Małgorzata Celeda
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
| | - Piotr Kaszyński
- Organic Materials
Research Group
Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Faculty of Chemistry, University of Łódź, Tamka 12, 91403
Łódź, Poland
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88
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Demetriou M, Berezin AA, Koutentis PA, Krasia-Christoforou T. Benzotriazinyl-mediated controlled radical polymerization of styrene. POLYM INT 2013. [DOI: 10.1002/pi.4566] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Maria Demetriou
- Department of Mechanical and Manufacturing Engineering; University of Cyprus; PO Box 20537 1678 Nicosia Cyprus
| | - Andrey A. Berezin
- Department of Chemistry; University of Cyprus; PO Box 20537 1678 Nicosia Cyprus
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89
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Jankowiak A, Pociecha D, Monobe H, Szczytko J, Dębska Ż, Romański J, Kaszyński P. Induction of Columnar Discotic Behavior in Verdazyl Radicals with Alkylsulfanyl Substituents. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.736896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Aleksandra Jankowiak
- a Department of Chemistry , Vanderbilt University , Nashville , TN , 37235 , USA
| | - Damian Pociecha
- b Department of Chemistry , University of Warsaw , 02-089 Warsaw , Poland
| | - Hirosato Monobe
- c Faculty of Physics , University of Warsaw , Hoża 69, 00-681 Warsaw , Poland
| | - Jacek Szczytko
- d National Institute of Advanced Industrial Science and Technology, AIST Kansai Centre , Ikeda , Osaka 563-8577 , Japan
| | - Żaneta Dębska
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
| | - Jarosław Romański
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
| | - Piotr Kaszyński
- a Department of Chemistry , Vanderbilt University , Nashville , TN , 37235 , USA
- e Faculty of Chemistry , University of Łódź , Tamka 12, 91403 , Łódź , Poland
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Sadhukhan T, Hansda S, Pal AK, Venkatakrishna GV, Latif IA, Datta SN. Theoretical Investigation of Photomagnetic Properties of Oxoverdazyl-Substituted Pyrenes. J Phys Chem A 2013; 117:8609-22. [DOI: 10.1021/jp402756j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Tumpa Sadhukhan
- Department of Chemistry,
Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - Shekhar Hansda
- Department of Chemistry,
Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - Arun K. Pal
- Department of Chemistry,
Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | | | - Iqbal A. Latif
- Department of Chemistry,
Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
| | - Sambhu N. Datta
- Department of Chemistry,
Indian Institute of Technology
Bombay, Powai, Mumbai 400 076, India
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91
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Barone V, Boilleau C, Cacelli I, Ferretti A, Prampolini G. Conformational Effects on the Magnetic Properties of an Organic Diradical: A Computational Study. J Chem Theory Comput 2013; 9:1958-63. [DOI: 10.1021/ct400020x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincenzo Barone
- Scuola Normale Superiore, Piazza
dei Cavalieri, I-56126 Pisa, Italy
| | | | - Ivo Cacelli
- Dipartimento di Chimica e Chimica
Industriale, Università di Pisa, Via Risorgimento 35, 56126
Pisa, Italy
| | - Alessandro Ferretti
- Istituto di Chimica
dei Composti
OrganoMetallici del CNR, Area della Ricerca di Pisa, Via G. Moruzzi
1, I-56122 Pisa, Italy
| | - Giacomo Prampolini
- Istituto per i Processi Chimico-Fisici
(IPCF-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
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93
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Revunova K, Gorelsky SI, Lemaire MT. Synthesis and coordination chemistry of a potential precursor to a triarylamminium radical cation ditopic ligand. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.06.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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94
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Ivanova A, Romanova J, Tadjer A, Baumgarten M. Magnetostructural correlation for rational design of Mn(II) hybrid-spin complexes. J Phys Chem A 2013; 117:670-8. [PMID: 23256643 DOI: 10.1021/jp312258j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The magnetic properties of a series of manganese(II) diacetylacetonate and dihexafluoroacetylacetonate hybrid-spin complexes with neutral pyridine-based organic radicals were characterized theoretically by DFT calculations. Three stable radicals, in which a radical group is bound in either para or meta position with respect to the pyridine nitrogen atom, were considered. The correct stable structures and multiplets of the complexes were obtained by full geometry optimization starting from an ideal structure. A total of three important geometry descriptors of the complexes were monitored and related to their magnetic characteristics. These structural parameters are (i) the torsion angle governing the conjugation of the organic radical m-PyNO (anti versus gauche), (ii) the coordination geometry of the acetyl acetonate ligands around the metal ion (square versus rhombic), and (iii) the relative orientation of the organic radical with respect to the acetyl acetonate plane (parallel versus perpendicular). It was found that the magnetic properties are not sensitive to the orientation of the radicals with respect to the equatorial plane but do depend on the conformation of the organic radicals. Even a spin switch between the ferromagnetic (S = (7)/(2)) and antiferromagnetic (S = (3)/(2)) ground state was found to be feasible for one of the complexes upon variation of the organic radical geometry, namely, the dihedral angle between the organic radical moiety and the pyridine ring. The pattern of molecular orbital overlap was determined to be the key factor governing the exchange coupling in the modeled systems. Bonding π-type overlap provides antiferromagnetic coupling in all complexes of the para radicals. In the meta analogues, the spins are coupled through the σ orbitals. A low-spin ground state occurs whenever a continuous σ-overlap pathway is present in the complex. Ferromagnetic interaction requires σ-π orthogonality of the pyridine atomic orbitals and/or π-antibonding Mn-pyridine natural orbital overlap. Using an estimate of the donor-acceptor energy stabilization, the affinity of a given Mn(II) d-orbital to mix with the sp(2) orbital from pyridine can be predicted.
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Affiliation(s)
- Anela Ivanova
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria.
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95
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Barnes JC, Fahrenbach AC, Cao D, Dyar SM, Frasconi M, Giesener MA, Benitez D, Tkatchouk E, Chernyashevskyy O, Shin WH, Li H, Sampath S, Stern CL, Sarjeant AA, Hartlieb KJ, Liu Z, Carmieli R, Botros YY, Choi JW, Slawin AMZ, Ketterson JB, Wasielewski MR, Goddard WA, Stoddart JF. A Radically Configurable Six-State Compound. Science 2013; 339:429-33. [DOI: 10.1126/science.1228429] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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96
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Fatila EM, Clérac R, Jennings M, Preuss KE. McConnell I mechanism promotes ferromagnetic interactions between π-stacked Ni(ii)–thiazyl complexes. Chem Commun (Camb) 2013; 49:9431-3. [DOI: 10.1039/c3cc45605f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Elisabeth M Fatila
- Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada.
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97
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Domingo A, Vérot M, Mota F, de Graaf C, Novoa JJ, Robert V. Impact of short and long-range effects on the magnetic interactions in neutral organic radical-based materials. Phys Chem Chem Phys 2013; 15:6982-9. [DOI: 10.1039/c3cp44647f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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98
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Liu J, Isshiki H, Katoh K, Morita T, Breedlove BK, Yamashita M, Komeda T. First Observation of a Kondo Resonance for a Stable Neutral Pure Organic Radical, 1,3,5-Triphenyl-6-oxoverdazyl, Adsorbed on the Au(111) Surface. J Am Chem Soc 2012; 135:651-8. [DOI: 10.1021/ja303510g] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Liu
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Hironari Isshiki
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Keiichi Katoh
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
| | - Takaumi Morita
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Brian, K. Breedlove
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
| | - Masahiro Yamashita
- Department of Chemistry,
Graduate
School of Science, Tohoku University, Aramaki-Aza-Aoba,
Aoba-Ku, Sendai 980-8578, Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
| | - Tadahiro Komeda
- Institute
of Multidisciplinary
Research for Advanced Materials (IMRAM, Tagen), Tohoku University, 2-1-1, Katahira, Aoba-Ku, Sendai 980-0877,
Japan
- JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama
332-0012, Japan
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99
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Bancerz M, Georges MK. Effects of N1 and N5 alkyl substituents on the stability of 6-oxoverdazyl radicals. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.10.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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100
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Barone V, Boilleau C, Cacelli I, Ferretti A, Monti S, Prampolini G. Structure–Properties Relationships in Triplet Ground State Organic Diradicals: A Computational Study. J Chem Theory Comput 2012; 9:300-7. [DOI: 10.1021/ct300790c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vincenzo Barone
- Scuola Normale Superiore, piazza
dei Cavalieri 7, I-56126 Pisa, Italy
| | - Corentin Boilleau
- Scuola Normale Superiore, piazza
dei Cavalieri 7, I-56126 Pisa, Italy
| | - Ivo Cacelli
- Dipartimento di Chimica e Chimica
Industriale, Università degli Studi di Pisa, via Risorgimento
35, I-56126 Pisa, Italy
| | - Alessandro Ferretti
- Istituto
di Chimica dei Composti
OrganoMetallici (ICCOM-CNR), Area della Ricerca, via G. Moruzzi 1,
I-56124 Pisa, Italy
| | - Susanna Monti
- Scuola Normale Superiore, piazza
dei Cavalieri 7, I-56126 Pisa, Italy
- Istituto
di Chimica dei Composti
OrganoMetallici (ICCOM-CNR), Area della Ricerca, via G. Moruzzi 1,
I-56124 Pisa, Italy
| | - Giacomo Prampolini
- Istituto
per i Processi Chimico-Fisici
(IPCF-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
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