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Cuza E, Mekuimemba CD, Cosquer N, Conan F, Pillet S, Chastanet G, Triki S. Spin Crossover and High-Spin State in Fe(II) Anionic Polymorphs Based on Tripodal Ligands. Inorg Chem 2021; 60:6536-6549. [PMID: 33843234 DOI: 10.1021/acs.inorgchem.1c00335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two new mononuclear Fe(II) polymorphs, [(C2H5)4N]2[Fe(py3C-OEt)(NCS)3]2 (1) and [(C2H5)4N][Fe(py3C-OEt)(NCS)3] (2) (py3C-OEt = tris(pyridin-2-yl)ethoxymethane), have been synthesized and characterized by single-crystal X-ray diffraction, by magnetic and photomagnetic measurements, and by detailed variable-temperature infrared spectroscopy. The molecular structure, in both complexes, is composed of the same anionic [Fe(py3C-OEt)(NCS)3]- complex (two units for 1 and one unit for 2) generated by coordination to the Fe(II) metal center of one tridentate py3C-OEt tripodal ligand and three terminal κN-SCN coligands. Magnetic studies revealed that polymorph 2 displays a high-spin (HS) state over the entire studied temperature range (300-10 K), while complex 1 exhibits an abrupt and complete spin crossover (SCO) transition at ca. 132.3 K, the structural characterizations of which, performed at 295 and 100 K, show a strong modification, resulting from the thermal evolutions of the Fe-N bond lengths and of the distortion parameters (∑ and Θ) of the FeN6 coordination sphere, in agreement with the presence of HS and low-spin (LS) states at 295 and 100 K, respectively. This thermal transition has been also confirmed by the thermal evolution of the maximum absorbance for ν(NCS) vibrational bands recorded in the temperature range 200-10 K. In 1 the signature of a metastable photoinduced HS state has been observed using photomagnetic and photoinfrared spectroscopy, leading to a similar T(LIESST) relaxation temperature (LIESST = light-induced excited spin-state trapping) of 70 K.
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Affiliation(s)
- Emmelyne Cuza
- Univ Brest, CNRS, CEMCA, 6 Avenue Le Gorgeu, C.S. 93837-29238 Brest Cedex 3, France
| | | | - Nathalie Cosquer
- Univ Brest, CNRS, CEMCA, 6 Avenue Le Gorgeu, C.S. 93837-29238 Brest Cedex 3, France
| | - Françoise Conan
- Univ Brest, CNRS, CEMCA, 6 Avenue Le Gorgeu, C.S. 93837-29238 Brest Cedex 3, France
| | | | - Guillaume Chastanet
- CNRS, Université Bordeaux, ICMCB, 87 Av. Doc. A. Schweitzer, F-33608 Pessac, France
| | - Smail Triki
- Univ Brest, CNRS, CEMCA, 6 Avenue Le Gorgeu, C.S. 93837-29238 Brest Cedex 3, France
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Cosquer N, Lefebvre E, Douziech B, Houille S, Michaud F, Gómez-García CJ, Conan F. Nickel precursors based on diamagnetic and paramagnetic di(imine)pyridine ligands for magnetic materials: Synthesis, X-ray structures and magnetic studies. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.04.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Motta C, Conan F, Roche M, Thao Chan M. Lymphocyte membrane fluidity in peripheral vascular disease patients after treatment with pentoxifylline. Clin Hemorheol Microcirc 2018. [DOI: 10.3233/ch-1989-9105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- C. Motta
- Laboratoire de Biochemie - Hôtel Dieu - Clermont-Ferrand, France
| | - F. Conan
- Laboratoire de Biochemie - Hôtel Dieu - Clermont-Ferrand, France
| | | | - M. Thao Chan
- Laboratoire d’Hémorhéologie - Laboratoires Hoechst, 1 terrasse Bellini, 92080 Paris la Défense, France
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Mekuimemba CD, Conan F, Mota AJ, Palacios MA, Colacio E, Triki S. On the Magnetic Coupling and Spin Crossover Behavior in Complexes Containing the Head-to-Tail [FeII2(μ-SCN)2] Bridging Unit: A Magnetostructural Experimental and Theoretical Study. Inorg Chem 2018; 57:2184-2192. [PMID: 29420016 DOI: 10.1021/acs.inorgchem.7b03082] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cle Donacier Mekuimemba
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
| | - Françoise Conan
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
| | - Antonio J. Mota
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Maria A. Palacios
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Smail Triki
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
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Déniel K, Cosquer N, Conan F, Triki S, Gómez-García CJ. Coordination polymers based on bridging cyanocarbanions and bis-tridentate p-phenylenediamine ligands. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.09.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Déniel K, Nebbali K, Cosquer N, Conan F, Gómez-García CJ, Yefsah S, Triki S. Polypyridyl-based Cu(II) coordination polymers: Synthesis, structural and magnetic characterizations. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Deback C, Burrel S, Varnous S, Carcelain G, Conan F, Aït-Arkoub Z, Autran B, Gandjbakhch I, Agut H, Boutolleau D. Management of multidrug-resistant cytomegalovirus infection in immunocompromised patients: case report of a heart-transplant recipient and review of the literature. Antivir Ther 2014; 20:249-54. [DOI: 10.3851/imp2818] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2014] [Indexed: 10/25/2022]
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Porras Gutiérrez AG, Zeitouny J, Gomila A, Douziech B, Cosquer N, Conan F, Reinaud O, Hapiot P, Le Mest Y, Lagrost C, Le Poul N. Insights into water coordination associated with the CuII/CuI electron transfer at a biomimetic Cu centre. Dalton Trans 2014; 43:6436-45. [DOI: 10.1039/c3dt53548g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The coordination chemistry of an aqua Cu complex was investigated in non-coordinating solvents and in ionic liquids.
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Orain C, Porras-Gutiérrez AG, Evoung Evoung F, Charles C, Cosquer N, Gomila A, Conan F, Le Mest Y, Le Poul N. Electrocatalytic reduction of nitrite ions by a copper complex attached as SAMs on gold by “self-induced electroclick”: Enhancement of the catalytic rate by surface coverage decrease. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.06.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Gomila A, Le Poul N, Kerbaol JM, Cosquer N, Triki S, Douziech B, Conan F, Le Mest Y. Electrochemical behavior and dioxygen reactivity of tripodal dinuclear copper complexes linked by unsaturated rigid spacers. Dalton Trans 2013; 42:2238-53. [DOI: 10.1039/c2dt31456h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Burrel S, Fovet C, Brunet C, Ovaguimian L, Hamm N, Conan F, Kalkias L, Agut H, Boutolleau D. Routine use of duplex real-time PCR assays including a commercial internal control for molecular diagnosis of opportunistic DNA virus infections. J Virol Methods 2012; 185:136-41. [PMID: 22766177 DOI: 10.1016/j.jviromet.2012.05.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Revised: 04/26/2012] [Accepted: 05/02/2012] [Indexed: 11/29/2022]
Abstract
The aim of this work was to improve the validity of laboratory-developed real-time PCR protocols implemented in the laboratory for molecular diagnosis of opportunistic DNA virus infections using the Simplexa™ extraction and amplification control (SEAC) which allows the monitoring of the whole extraction and amplification process. Herpes simplex virus (HSV), varicella-zoster virus (VZV), human cytomegalovirus (CMV), Epstein-Barr virus (EBV), BK virus (BKV), and adenovirus (AdV) genomes were investigated in 152 different clinical specimens. The use of the SEAC did not influence the results of the different virus-specific PCRs. The SEAC results showed high reproducibility with a mean Cp value of 31.08±1.44, and were not influenced by the virus-specific PCR performed or the type of clinical specimen tested. The SEAC in the DNA extracts showed high stability during storage at both +4°C and -20°C. These data allowed establishing a new procedure for the validation of viral PCR results. In conclusion, the SEAC provides a reliable option for improving the diagnosis of opportunistic viral infections by laboratory-developed real-time PCR assays in quality assurance programs.
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Affiliation(s)
- Sonia Burrel
- UPMC Univ Paris 06, ER1 DETIV, F-75013 Paris, France
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Orain C, Le Poul N, Gomila A, Kerbaol JM, Cosquer N, Reinaud O, Conan F, Le Mest Y. A Generic Platform for the Addressable Functionalisation of Electrode Surfaces through Self-Induced “Electroclick”. Chemistry 2011; 18:594-602. [DOI: 10.1002/chem.201102620] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Indexed: 11/05/2022]
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Atmani C, El Hajj F, Benmansour S, Marchivie M, Triki S, Conan F, Patinec V, Handel H, Dupouy G, Gómez-García CJ. Guidelines to design new spin crossover materials. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2009.11.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Boutolleau D, Deback C, Bressollette-Bodin C, Conan F, Aït-Arkoub Z, Imbert-Marcille BM, Agut H. Genetic analysis and putative role in resistance to antivirals of the human cytomegalovirus DNA polymerase UL44 processivity factor. Antivir Ther 2009; 14:847-52. [PMID: 19812447 DOI: 10.3851/imp1299] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND The human cytomegalovirus (HCMV) DNA polymerase is composed of the UL54 catalytic subunit and the UL44 accessory protein. UL44 increases the processivity of polymerase along the DNA template during replication and, incidentally, is a substrate for the UL97 phosphotransferase. The molecular mechanisms of HCMV resistance to antiviral drugs interfering with viral DNA synthesis reported so far only rely on the presence of amino acid changes within the UL97 and UL54 viral enzymes. We aimed to describe the natural polymorphism of UL44 and to analyse the changes of its amino acids potentially associated with HCMV resistance to antivirals. METHODS The full-length UL44 gene sequence was compared to that of four reference strains (including the AD169 strain) and 43 clinical strains from patients who had not received any previous anti-HCMV treatment, and 25 blood samples from 15 HCMV-infected patients experiencing therapeutic failure and exhibiting genotypic traits of HCMV resistance to antivirals. RESULTS Overall, seven different amino acid changes associated with natural polymorphisms were identified among the 433 residues of the UL44 protein, occurring at a frequency of 2.1% for five of them and 10.6% for the double change G296S+L319I. The analysis of the HCMV strains exhibiting genotypic resistance to antivirals did not show any changes in UL44 that had significant association with resistance mutations of UL97 and/or UL54. CONCLUSIONS UL44 processivity factor exhibits a very low polymorphism that does not concern the assumed functional domains of the protein. From this preliminary study, UL44 does not seem to be involved in HCMV resistance to antivirals.
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Le Poul N, Douziech B, Zeitouny J, Thiabaud G, Colas H, Conan F, Cosquer N, Jabin I, Lagrost C, Hapiot P, Reinaud O, Le Mest Y. Mimicking the Protein Access Channel to a Metal Center: Effect of a Funnel Complex on Dissociative versus Associative Copper Redox Chemistry. J Am Chem Soc 2009; 131:17800-7. [DOI: 10.1021/ja9055905] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolas Le Poul
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Bénédicte Douziech
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Joceline Zeitouny
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Grégory Thiabaud
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Hélène Colas
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Françoise Conan
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Nathalie Cosquer
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Ivan Jabin
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Corinne Lagrost
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Philippe Hapiot
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Olivia Reinaud
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
| | - Yves Le Mest
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, CNRS, UMR 6521, Université Européenne de Bretagne à Brest, 6 av. Le Gorgeu, 29238 Brest cedex, France, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Université Paris Descartes, 45 rue des Saints-Pères, 75006 Paris, France, Laboratoire de Chimie Organique, Université Libre de Bruxelles, Brussels, Belgium, and Sciences Chimiques de Rennes, MaCSE, CNRS, UMR 6226, Université Européenne de Bretagne
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Hubacek P, Boutolleau D, Deback C, Hrdlickova A, Conan F, Lelabousse B, Zajac M, Markova M, Keslova P, Agut H, Sedlacek P, Cetkovsky P. PIX-3 Cytomegalovirus (CMV) resistance to antivirals in children and adult hematopoietic stem cell transplant recipients from the Czech Republic – a two centres experience. J Clin Virol 2009. [DOI: 10.1016/s1386-6532(09)70208-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Cosquer N, Gall BL, Conan F, Kerbaol JM, Sala-Pala J, Kubicki MM, Vigier E. Carbonylmolybdenum complexes with di(imino)pyridine and related ligands: Reduction of a di(imino)pyridine to an aminoiminopyridine system under mild conditions. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bernier N, Allali M, Tripier R, Conan F, Patinec V, Develay S, Le Baccon M, Handel H. New side-bridged bismacrocycles and cross-bridged macrotricycles. Syntheses and Cu(ii) complexation study. NEW J CHEM 2006. [DOI: 10.1039/b515150c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gall BL, Conan F, Cosquer N, Kerbaol JM, Sala-Pala J, Kubicki MM, Vigier E, Gomez-Garcia CJ, Molinié P. Organocyanide coordination chemistry: Syntheses, structural characterisations and magnetic properties of copper (II) complexes with a di-imine/pyridine ligand. Inorganica Chim Acta 2005. [DOI: 10.1016/j.ica.2005.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Marcelin AG, Dalban C, Peytavin G, Lamotte C, Agher R, Delaugerre C, Wirden M, Conan F, Dantin S, Katlama C, Costagliola D, Calvez V. Clinically relevant interpretation of genotype and relationship to plasma drug concentrations for resistance to saquinavir-ritonavir in human immunodeficiency virus type 1 protease inhibitor-experienced patients. Antimicrob Agents Chemother 2005; 48:4687-92. [PMID: 15561845 PMCID: PMC529185 DOI: 10.1128/aac.48.12.4687-4692.2004] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
It has been shown that virological protease inhibitor (PI) resistance mutations present at the initiation of saquinavir (SQV) plus ritonavir (RTV) therapy in PI-experienced patients are the strongest predictors of virological response. But most of the current resistance algorithms are adapted for unboosted SQV regimens. We applied a stepwise methodology for the development and validation of a clinically relevant genotypic resistance score for an SQV (800 mg twice per day [b.i.d.]) plus RTV (100 mg b.i.d.)-containing regimen. PI-experienced patients treated by this regimen achieved a human immunodeficiency virus plasma viral load (VL) of <200 copies/ml at months 3 to 5 for 41.7% of subjects. Adjusted in a multivariate analysis, taking into account all the confounding factors, such as the nucleoside used, five mutations were combined in a resistance score associated with a reduced virological response to an SQV-plus-RTV regimen: L24I, I62V, V82A/F/T/S, I84V, and L90IM. Patients with isolates harboring 0 to 1 mutation among the score achieved -2.20 log10 and -1.23 log10 copies/ml of VL reduction, respectively, while it was -0.27 log10 copies/ml for those with at least two mutations, classifying the isolates as "no evidence of resistance" (0 or 1 mutation) or "resistance " (> or =2 mutations). The minimum concentration in plasma (Cmin) of SQV alone was not associated with the virological response. However, the combination of the SQV Cmin and the genotypic score, expressed as the genotypic inhibitory quotient, was predictive of the virological response, suggesting that the interpretation of SQV concentrations in plasma should be done only in the context of the resistance index provided by viral genotype for PI-experienced patients.
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Conan F, Le Gall B, Kerbaol JM, Le Stang S, Sala-Pala J, Le Mest Y, Bacsa J, Ouyang X, Dunbar KR, Campana CF. Electrochemical, Spectroscopic, and Structural Evidence for the Mild Hydrolysis of Tetracyanoethylene, TCNE, To Form the 2,3,3-Tricyanoacrylamidate Ligand: Isolation of an Unexpected Quadruply-Bonded Polymeric Material [Mo2(O2CCMe3)3((NC)2CC(CN)CONH)]∞. Inorg Chem 2004; 43:3673-81. [PMID: 15180422 DOI: 10.1021/ic0351186] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Under strictly anhydrous conditions, no reaction occurs between Mo(2)(O(2)CCMe(3))(4) and tetracyanoethylene, TCNE, at room temperature, but after addition of 1 equiv of water, a reaction proceeds to form [Mo(2)(O(2)CCMe(3))(3)((NC)(2)CC(CN)CONH)], 1. The compound contains a quadruple-bonded Mo(2) unit and the 2,3,3-tricyanoacrylamidate anion as a ligand (TC3A), a very unusual hydrolyzed form of TCNE. Two different solid-state structures were obtained after crystallization of 1. Crystals obtained from CH(2)Cl(2) consist of a two-dimensional network, and crystals grown from a C(6)H(6) solution form a 1-D chain motif. In both cases, the TC3A ligand acts as a polydentate ligand involving a bidentate OCN bridging unit and two CN groups. The electrochemical and spectroscopic (IR, UV/vis/near-IR, NMR, EPR) properties of 1 support the formulation in solution as a discrete 1:1 complex of the TC3A donor ligand and a Mo(2) unit with no charge transfer. The coordinated TC3A ligand exhibits redox properties similar to those of free TCNE.
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Affiliation(s)
- Françoise Conan
- Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique, UMR CNRS 6521, Université de Bretagne Occidentale, CS 93837, 6 av. Victor Le Gorgeu, 29238 Brest Cedex 3, France
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Le Gall B, Conan F, Kerbaol JM, Kubicki MM, Vigier E, Le Mest Y, Sala Pala J. Unprecedented reactivity of a Schiff base ligand in the co-ordination sphere of copper(I) complex towards β-diketones. Synthesis and X-ray characterisation of a new copper(I) complex. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00870-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reardon D, Conan F, Gambarotta S, Yap G, Wang Q. Life and Death of an Active Ethylene Polymerization Catalyst. Ligand Involvement in Catalyst Activation and Deactivation. Isolation and Characterization of Two Unprecedented Neutral and Anionic Vanadium(I) Alkyls. J Am Chem Soc 1999. [DOI: 10.1021/ja990263x] [Citation(s) in RCA: 185] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Damien Reardon
- Contribution from the Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada, and NOVA Chemicals Corporation, 2928 16th Street N.E. Calgary, Alberta T2E 7K7, Canada
| | - Françoise Conan
- Contribution from the Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada, and NOVA Chemicals Corporation, 2928 16th Street N.E. Calgary, Alberta T2E 7K7, Canada
| | - Sandro Gambarotta
- Contribution from the Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada, and NOVA Chemicals Corporation, 2928 16th Street N.E. Calgary, Alberta T2E 7K7, Canada
| | - Glenn Yap
- Contribution from the Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada, and NOVA Chemicals Corporation, 2928 16th Street N.E. Calgary, Alberta T2E 7K7, Canada
| | - Qinyan Wang
- Contribution from the Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada, and NOVA Chemicals Corporation, 2928 16th Street N.E. Calgary, Alberta T2E 7K7, Canada
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Conan F, Pala JS, Garland MT, Baggio R. Synthesis and crystal structure of a new salt of the complex anion [(TCNQ)3]2− [Mo2(μ2-S2)2 (S2CNME2)4] (TCNQ)3. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)06173-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Le Stang S, Conan F, Sala Pala J, Mest YL, Garland MT, Baggio R, Faulques E, Leblanc A, Molinié P, Toupet L. Reactivity of tungsten(V) mononuclear complexes towards Li(TCNQ) and TCNQ. Comparison of the crystal structures of [W(S2CNMe2)4][TCNQ] and [Mo(S2CNMe2)4][TCNQ]·MeCN (TCNQ = 7,7,8,8-tetracyanoquinodimethane)‡. ACTA ACUST UNITED AC 1998. [DOI: 10.1039/a707555c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Faulques E, Leblanc A, Molinié P, Decoster M, Conan F, Sala-Pala J. Monomer, Dimer, and Tetramer States in Molybdenum Complexes of Tetracyanoquinodimethane. J Phys Chem B 1997. [DOI: 10.1021/jp9638651] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Decoster M, Conan F, Kubicki M, Le Mest Y, Richard P, Sala Pala J, Toupet L. Azacyanocarbon chemistry. Comparison of the hexacyano-3,4-diazahexa-1,5-dienediide [C10N8]2− with the corresponding radical anion [C10N8]˙−: electrochemical and EPR studies, crystallographic and electronic structures. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a605243f] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Conan F, Guerchais JE, Mercier R, Sala-Pala J, Toupet L. Unprecedented reactions of alkynes with η2-CS2metal complexes. ACTA ACUST UNITED AC 1988. [DOI: 10.1039/c39880000345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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