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Kadafour AN, Ibrahim H, Bala MD. Synthesis, characterization and application of new imino-functionalized 1,3-diazolium salts as antimicrobial agents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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Ritleng V, Michon C. Bidentate Donor-Functionalized N-Heterocyclic Carbenes: Valuable Ligands for Ruthenium-Catalyzed Transfer Hydrogenation. Molecules 2022; 27:molecules27154703. [PMID: 35897879 PMCID: PMC9329912 DOI: 10.3390/molecules27154703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 11/23/2022] Open
Abstract
Ruthenium complexes are by far the most studied compounds that catalyze hydrogen transfer reactions. In this review, we describe the use in this field of ruthenium complexes bearing bidentate donor-functionalized N-heterocyclic carbene ligands. The review specifically covers the application in transfer hydrogenations of (κ2-CNHC,Y)-ruthenacyclic compounds where the Y donor atom is a N, P, O, or S atom, and where the N-heterocyclic carbene ligand is a classical imidazol-2-ylidene, a benzimidazol-2-ylidene, a mesoionic 1,2,3-triazolylidene, or an imidazol-4-ylidene ligand. Tridentate donor-functionalized N-heterocyclic carbene complexes thus fall outside the scope of the review. Applications in (asymmetric) transfer hydrogenation of ketones, aldehydes, imines, alkenes, and nitrobenzene are discussed.
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Tsui BTH, Sung MMH, Kinas J, Hahn FE, Morris RH. A Ruthenium Protic N-Heterocyclic Carbene Complex as a Precatalyst for the Efficient Transfer Hydrogenation of Aryl Ketones. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brian T. H. Tsui
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Molly M. H. Sung
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Jenny Kinas
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, Münster D-48149, Germany
| | - F. Ekkehardt Hahn
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, Münster D-48149, Germany
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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Shepelenko KE, Nikolaeva KA, Shevchenko MA, Tkachenko YN, Minyaev ME, Chernyshev VM. Ruthenium complexes with chelating carboxylate-NHC ligands as efficient catalysts for C H arylation in water. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.03.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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5
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Cui L, Hu Y, Guo S. Ruthenium(II) complexes bearing chelating Carboxylate-anchored normal and abnormal Carbenes: Synthesis, characterizations and catalytic applications. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Neshat A, Mastrorilli P, Mousavizadeh Mobarakeh A. Recent Advances in Catalysis Involving Bidentate N-Heterocyclic Carbene Ligands. Molecules 2021; 27:95. [PMID: 35011327 PMCID: PMC8746573 DOI: 10.3390/molecules27010095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/02/2021] [Accepted: 12/13/2021] [Indexed: 11/17/2022] Open
Abstract
Since the discovery of persistent carbenes by the isolation of 1,3-di-l-adamantylimidazol-2-ylidene by Arduengo and coworkers, we witnessed a fast growth in the design and applications of this class of ligands and their metal complexes. Modular synthesis and ease of electronic and steric adjustability made this class of sigma donors highly popular among chemists. While the nature of the metal-carbon bond in transition metal complexes bearing N-heterocyclic carbenes (NHCs) is predominantly considered to be neutral sigma or dative bonds, the strength of the bond is highly dependent on the energy match between the highest occupied molecular orbital (HOMO) of the NHC ligand and that of the metal ion. Because of their versatility, the coordination chemistry of NHC ligands with was explored with almost all transition metal ions. Other than the transition metals, NHCs are also capable of establishing a chemical bond with the main group elements. The advances in the catalytic applications of the NHC ligands linked with a second tether are discussed. For clarity, more frequently targeted catalytic reactions are considered first. Carbon-carbon coupling reactions, transfer hydrogenation of alkenes and carbonyl compounds, ketone hydrosilylation, and chiral catalysis are among highly popular reactions. Areas where the efficacy of the NHC based catalytic systems were explored to a lesser extent include CO2 reduction, C-H borylation, alkyl amination, and hydroamination reactions. Furthermore, the synthesis and applications of transition metal complexes are covered.
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Affiliation(s)
- Abdollah Neshat
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
| | - Piero Mastrorilli
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona, I-70125 Bari, Italy;
| | - Ali Mousavizadeh Mobarakeh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
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Synthesis and stereochemical features of tartratostannates with complex 1,10-phenanthroline cations of Fe(II), Co(II), Ni(II), Cu(II), Zn(II). Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Thapa R, Kilyanek SM. Synthesis and structural characterization of 20-membered macrocyclic rings bearing trans-chelating bis(N-heterocyclic carbene) ligands and the catalytic activity of their palladium(ii) complexes. Dalton Trans 2019; 48:12577-12590. [PMID: 31368475 PMCID: PMC6702049 DOI: 10.1039/c9dt02147g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Macrocycles consisting of a 20-membered ring containing two imidazolium salt functionalities and of the formula [PhCH2N(CH2CH2CH2)Im(CH2CH2CH2)2][Br]2 (Im = imidazole = 3a, benzimidazole = 3b) were synthesized in 70-75% yields. These salts serve as precursors to macrocycles containing two N-heterocyclic carbene (NHC) moieties. Reaction of the macrocyclic salts 3a and 3b with silver oxide afforded macrocyclic-bis(NHC)silver(i) complexes 4a and 4b. Single-crystal X-ray diffraction studies of macrocyclic-bis(NHC)silver(i) complex 4a revealed a tetranuclear silver core with a short Ag-Ag distance (2.9328 Å). Complexes 4a and 4b serve as carbene transfer reagents to Pd. The treatment of macrocyclic-bis(NHC)silver(i) complexes 4a and 4b with one equivalent of PdCl2(MeCN)2 in methylene chloride afforded square-planar trans-macrocyclic-bis(NHC)Pd(ii)X2 complexes 5a and 5b. Preliminary screening of these palladium complexes showed they are competent precatalysts for Heck and Suzuki coupling reactions.
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Affiliation(s)
- Rajesh Thapa
- Department of Chemistry and Biochemistry, 1 University of Arkansas, Fayetteville, AR 72701, USA.
| | - Stefan M Kilyanek
- Department of Chemistry and Biochemistry, 1 University of Arkansas, Fayetteville, AR 72701, USA.
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Lim YN, Chae SK, Yim W, Park JY, Yoon W, Yun H, Kim E, Son SU, Jang HY. Template-free anion-controlled synthesis of Pd (II) nano-aggregates for the antifouling polymerization of CO and ethylene. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yu Na Lim
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
| | - Soo Kyung Chae
- Department of Chemistry; Sungkyunkwan University; Suwon 16419 Korea
| | - Woongbin Yim
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
| | - Ji-Yong Park
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
| | - Woojin Yoon
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
| | - Hoseop Yun
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
| | - Eunha Kim
- Department of Molecular Science and Technology; Ajou University; Suwon 16499 Korea
| | - Seung Uk Son
- Department of Chemistry; Sungkyunkwan University; Suwon 16419 Korea
| | - Hye-Young Jang
- Department of Energy Systems Research; Ajou University; Suwon 16499 Korea
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Ramasamy B, P PA, Gangwar MK, Ghosh P. Asymmetric Transfer Hydrogenation ofα,β-Unsaturated Carbonyl Compounds to Saturated Alcohols as Catalyzed by Iridium Complexes of Tricyclic Bioxazoline-Fused Imidazole-Derived N-Heterocyclic Carbene Ligands. ChemistrySelect 2019. [DOI: 10.1002/slct.201803293] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Balasubramaniyam Ramasamy
- BASF Chemicals India Pvt. Ltd; Innovation campus, Navi; Mumbai 400 705
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - Prakasham. A. P
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - Manoj Kumar Gangwar
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
| | - Prasenjit Ghosh
- Department of Chemistry; Indian Institute of Technology Bombay, Powai; Mumbai 400 076
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Transfer hydrogenation of ketones catalyzed by a trinuclear Ni(II) complex of a Schiff base functionalized N-heterocyclic carbene ligand. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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12
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Hameury S, de Frémont P, Braunstein P. Metal complexes with oxygen-functionalized NHC ligands: synthesis and applications. Chem Soc Rev 2018; 46:632-733. [PMID: 28083579 DOI: 10.1039/c6cs00499g] [Citation(s) in RCA: 150] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Ligand design has met with considerable success with both categories of hybrid ligands, which are characterized by chemically different donor groups, and of N-heterocyclic carbenes (NHCs). Their spectacular development and diversity are attracting worldwide interest and offers almost unlimited diversity and potential in e.g. coordination/organometallic main group and transition metal chemistry, catalysis, medicinal chemistry and materials science. This review aims at providing a comprehensive update on a specific class of ligands that has enjoyed much attention in the past few years, at the intersection between the two categories mentioned above, that of hybrid NHC ligands in which the functionality associated with the carbene donor is of the oxygen-donor type. For each type of oxygen-donor present in such chelating (Section 1) or bridging (Section 2) hybrid ligands, we will examine the synthesis, structures and reactivity of their metal complexes and their applications, with a special focus on homogeneous catalysis (Section 3). Thus, hydrogenation, C-H bond activation, C-C, C-N, C-O bond formation, hydrolysis of silanes, oligomerization, polymerization, metathesis, hydrosilylation, C-C bond cleavage, acceptorless dehydrogenation, dehalogenation/hydrogen transfer, oxidation and reduction reactions will be successively presented in a tabular manner, to facilitate an overview and a rapid identification of the relevant publications describing which metals associated with a given oxygen functionality are most suitable. The literature coverage includes the year 2015.
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Affiliation(s)
- Sophie Hameury
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France. and Universität Freiburg, Makromolekulare Chemie, Stefan-Meier-Str. 31, 79104 Freiburg, Germany
| | - Pierre de Frémont
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France. and Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Synthèse, Réactivité et Catalyse Organométalliques, 4 rue Blaise Pascal, 67081 Strasbourg, France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, CHIMIE UMR 7177, Laboratoire de Chimie de Coordination, 4 rue Blaise Pascal, 67081 Strasbourg, France.
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Abstract
It is well-recognized that N-heterocyclic carbene (NHC) ligands have provided a new dimension to the design of homogeneous catalysts. Part of the success of this type of ligands resides in the limitless access to a variety of topologies with tuned electronic properties, but also in the ability of a family of NHCs that are able to adapt their properties to the specific requirements of individual catalytic transformations. The term "smart" is used here to refer to switchable, multifunctional, adaptable, or tunable ligands and, in general, to all those ligands that are able to modify their steric or electronic properties to fulfill the requirements of a defined catalytic reaction. The purpose of this review is to comprehensively describe all types of smart NHC ligands by focusing attention on the catalytically relevant ligand-based reactivity.
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Affiliation(s)
- Eduardo Peris
- Institute of Advanced Materials , Universitat Jaume I , Avenida Vicente Sos Baynat s/n , Castellón E-12071 , Spain
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Guan L, Wang Y. Hydrothermal synthesis, crystal structure, and properties of a novel tetranuclear calcium complex constructed with aromatic sulfonate-carboxylate ligand. INORG NANO-MET CHEM 2017. [DOI: 10.1080/15533174.2015.1137318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Lei Guan
- School of Chemistry and Materials Science, Liaoning Shihua University, Fushun, P. R. China
| | - Ying Wang
- School of Chemistry and Materials Science, Liaoning Shihua University, Fushun, P. R. China
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Htet Y, Tennyson AG. Catalytic radical reduction in aqueous solution via oxidation of biologically-relevant alcohols. Chem Sci 2016; 7:4052-4058. [PMID: 30155048 PMCID: PMC6013915 DOI: 10.1039/c6sc00651e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 03/04/2016] [Indexed: 01/05/2023] Open
Abstract
An organoruthenium complex catalyzed radical reduction in aqueous solution via oxidation of amino acids, sugars, or citric acid cycle metabolites.
Metalloenzymes that normally perform catalytic antioxidant or radical-degrading functions, as well as small-molecule complexes that mimic them, can also exert pro-oxidant or radical-forming effects depending on the identity of the terminal reductant. Because nitroxyl radicals function as redox active cocatalysts in the aerobic oxidation of alcohols, we hypothesized that catalytic radical reduction could be achieved via the oxidation of biologically-relevant alcohols. Herein we report an organoruthenium complex (Ru1) that catalyzed reduction of 2,2′-azino-bis(3-ethylbenzo-thiazoline-6-sulfonate) radical monoanion (ABTS˙–) to ABTS2– in phosphate buffered saline (pH 7.4) using MeOH, EtOH, i-PrOH, serine, threonine, glucose, arabinose, methyl lactate or dimethyl malate as the terminal reductant. Replacing either the C–H or O–H groups of a –CHOH– moiety resulted in the loss of ABTS˙– reducing ability. Moreover, in conjunction with an alcohol terminal reductant, Ru1 was able to inhibit the oxidation of ABTS2– by H2O2 and horseradish peroxidase, even after multiple successive challenges with excess H2O2 or ABTS˙–. Collectively, these results demonstrate that Ru1 inhibits the oxidative formation of and catalyzes the reduction of radicals in aqueous solution via oxidation of biologically-relevant alcohols.
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Affiliation(s)
- Yamin Htet
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA .
| | - Andrew G Tennyson
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA . .,Department of Materials Science and Engineering , Clemson University , Clemson , SC 29634 , USA.,Center for Optical Materials Science and Engineering Technologies , Anderson , SC 29625 , USA
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Akkoç S, Gök Y, İlhan İÖ, Kayser V. N-Methylphthalimide-substituted benzimidazolium salts and PEPPSI Pd-NHC complexes: synthesis, characterization and catalytic activity in carbon-carbon bond-forming reactions. Beilstein J Org Chem 2016; 12:81-8. [PMID: 26877810 PMCID: PMC4734419 DOI: 10.3762/bjoc.12.9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2015] [Accepted: 01/05/2016] [Indexed: 02/01/2023] Open
Abstract
A series of novel benzimidazolium salts (1–4) and their pyridine enhanced precatalyst preparation stabilization and initiation (PEPPSI) themed palladium N-heterocyclic carbene complexes [PdCl2(NHC)(Py)] (5–8), where NHC = 1-(N-methylphthalimide)-3-alkylbenzimidazolin-2-ylidene and Py = 3-chloropyridine, were synthesized and characterized by means of 1H and 13C{1H} NMR, UV–vis (for 5–8), ESI-FTICR-MS (for 2, 4, 6–8) and FTIR spectroscopic methods and elemental analysis. The synthesized compounds were tested in Suzuki–Miyaura cross-coupling (for 1–8) and arylation (for 5–8) reactions. As catalysts, they demonstrated a highly efficient route for the formation of asymmetric biaryl compounds even though they were used in very low loading. For example, all compounds displayed good catalytic activity for the C–C bond formation of 4-tert-butylphenylboronic acid with 4-chlorotoluene.
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Affiliation(s)
- Senem Akkoç
- Faculty of Pharmacy, The University of Sydney, 2006 Sydney, Australia; Department of Chemistry, Faculty of Sciences, Erciyes University, Talas Street, 38039 Kayseri, Turkey
| | - Yetkin Gök
- Department of Chemistry, Faculty of Arts and Sciences, Inönü University, 44280 Malatya, Turkey
| | - İlhan Özer İlhan
- Department of Chemistry, Faculty of Sciences, Erciyes University, Talas Street, 38039 Kayseri, Turkey
| | - Veysel Kayser
- Faculty of Pharmacy, The University of Sydney, 2006 Sydney, Australia
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Mangalum A, Htet Y, Roe DA, McMillen CD, Tennyson AG. Net charge effects in N-heterocyclic carbene–ruthenium complexes with similar oxidation states and coordination geometries. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.06.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Affiliation(s)
- Dong Wang
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
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