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Fernández-Fariña S, Maneiro M, Zaragoza G, Seco JM, Pedrido R, González-Noya AM. Nickel, copper, and zinc dinuclear helicates: how do bulky groups influence their architecture? Dalton Trans 2024; 53:5676-5685. [PMID: 38445308 DOI: 10.1039/d4dt00279b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The ligand design factors that may influence the isolation of metallosupramolecular helicates or mesocates still deserve to be investigated. In this sense, dinuclear nickel(II), copper(II) and zinc(II) compounds were obtained by electrochemical synthesis using a family of five Schiff base ligands, H2Ln (n = 1-5), derived from bisphenylmethane and functionalized with bulky tert-butyl groups in the periphery and ethyl groups in the spacer. Six of the new complexes were characterized by X-ray crystallography, thus demonstrating that the helicate structure is predominant in the solid state. 1H NMR studies were performed for the zinc complexes to analyze if the helical architecture of the metal complexes is retained in solution. These studies reveal that the presence of a tert-butyl group in the ortho position with respect to the OH group is an essential factor identified for the existence of a helicate conformation in solution.
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Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, E-27002, Lugo, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, E-27002, Lugo, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio CACTUS, Universidade de Santiago de Compostela, Campus Sur, Santiago de Compostela, Galicia, E-15782, Spain
| | - José M Seco
- Departamento de Química Orgánica Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, E-15782, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, E-15782, Spain.
| | - Ana M González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, E-15782, Spain.
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2
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Fernández-Fariña S, Velo-Heleno I, Rodríguez-Silva L, Maneiro M, González-Noya AM, Pedrido R. A Dinuclear Copper(II) Complex Electrochemically Obtained via the Endogenous Hydroxylation of a Carbamate Schiff Base Ligand: Synthesis, Structure and Catalase Activity. Int J Mol Sci 2024; 25:2154. [PMID: 38396831 PMCID: PMC10889102 DOI: 10.3390/ijms25042154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 02/01/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
In the present work, we report a neutral dinuclear copper(II) complex, [Cu2(L1)(OH)], derived from a new [N,O] donor Schiff base ligand L1 that was formed after the endogenous hydroxylation of an initial carbamate Schiff base H2L coordinated with copper ions in an electrochemical cell. The copper(II) complex has been fully characterized using different techniques, including X-ray diffraction. Direct current (DC) magnetic susceptibility measurements were also performed at variable temperatures, showing evidence of antiferromagnetic behavior. Its catalase-like activity was also tested, demonstrating that this activity is affected by temperature.
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Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (S.F.-F.) (L.R.-S.); (M.M.)
| | - Isabel Velo-Heleno
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (I.V.-H.); (A.M.G.-N.)
| | - Laura Rodríguez-Silva
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (S.F.-F.) (L.R.-S.); (M.M.)
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (S.F.-F.) (L.R.-S.); (M.M.)
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (I.V.-H.); (A.M.G.-N.)
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (I.V.-H.); (A.M.G.-N.)
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3
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Barreiro-Sisto U, Fernández-Fariña S, González-Noya AM, Pedrido R, Maneiro M. Enemies or Allies? Hormetic and Apparent Non-Dose-Dependent Effects of Natural Bioactive Antioxidants in the Treatment of Inflammation. Int J Mol Sci 2024; 25:1892. [PMID: 38339170 PMCID: PMC10855620 DOI: 10.3390/ijms25031892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024] Open
Abstract
This review aims to analyze the emerging number of studies on biological media that describe the unexpected effects of different natural bioactive antioxidants. Hormetic effects, with a biphasic response depending on the dose, or activities that are apparently non-dose-dependent, have been described for compounds such as resveratrol, curcumin, ferulic acid or linoleic acid, among others. The analysis of the reported studies confirms the incidence of these types of effects, which should be taken into account by researchers, discarding initial interpretations of imprecise methodologies or measurements. The incidence of these types of effects should enhance research into the different mechanisms of action, particularly those studied in the field of basic research, that will help us understand the causes of these unusual behaviors, depending on the dose, such as the inactivation of the signaling pathways of the immune defense system. Antioxidative and anti-inflammatory activities in biological media should be addressed in ways that go beyond a mere statistical approach. In this work, some of the research pathways that may explain the understanding of these activities are revised, paying special attention to the ability of the selected bioactive compounds (curcumin, resveratrol, ferulic acid and linoleic acid) to form metal complexes and the activity of these complexes in biological media.
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Affiliation(s)
- Uxía Barreiro-Sisto
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (U.B.-S.); (S.F.-F.)
| | - Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (U.B.-S.); (S.F.-F.)
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain; (U.B.-S.); (S.F.-F.)
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4
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Uzal-Varela R, Rodríguez-Rodríguez A, Lalli D, Valencia L, Maneiro M, Botta M, Iglesias E, Esteban-Gómez D, Angelovski G, Platas-Iglesias C. Endeavor toward Redox-Responsive Transition Metal Contrast Agents Based on the Cross-Bridge Cyclam Platform. Inorg Chem 2024; 63:1575-1588. [PMID: 38198518 PMCID: PMC10806912 DOI: 10.1021/acs.inorgchem.3c03486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
We present the synthesis and characterization of a series of Mn(III), Co(III), and Ni(II) complexes with cross-bridge cyclam derivatives (CB-cyclam = 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane) containing acetamide or acetic acid pendant arms. The X-ray structures of [Ni(CB-TE2AM)]Cl2·2H2O and [Mn(CB-TE1AM)(OH)](PF6)2 evidence the octahedral coordination of the ligands around the Ni(II) and Mn(III) metal ions, with a terminal hydroxide ligand being coordinated to Mn(III). Cyclic voltammetry studies on solutions of the [Mn(CB-TE1AM)(OH)]2+ and [Mn(CB-TE1A)(OH)]+ complexes (0.15 M NaCl) show an intricate redox behavior with waves due to the MnIII/MnIV and MnII/MnIII pairs. The Co(III) and Ni(II) complexes with CB-TE2A and CB-TE2AM show quasi-reversible features due to the CoIII/CoII or NiII/NiIII pairs. The [Co(CB-TE2AM)]3+ complex is readily reduced by dithionite in aqueous solution, as evidenced by 1H NMR studies, but does not react with ascorbate. The [Mn(CB-TE1A)(OH)]+ complex is however reduced very quickly by ascorbate following a simple kinetic scheme (k0 = k1[AH-], where [AH-] is the ascorbate concentration and k1 = 628 ± 7 M-1 s-1). The reduction of the Mn(III) complex to Mn(II) by ascorbate provokes complex dissociation, as demonstrated by 1H nuclear magnetic relaxation dispersion studies. The [Ni(CB-TE2AM)]2+ complex shows significant chemical exchange saturation transfer effects upon saturation of the amide proton signals at 71 and 3 ppm with respect to the bulk water signal.
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Affiliation(s)
- Rocío Uzal-Varela
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Aurora Rodríguez-Rodríguez
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Daniela Lalli
- Dipartimento
di Scienze e Innovazione Tecnologica, Magnetic Resonance Platform
(PRISMA-UPO), Universitá del Piemonte
Orientale, Viale T. Michel
11, Alessandria 15121, Italy
| | - Laura Valencia
- Departamento
de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende 36310, Pontevedra, Spain
| | - Marcelino Maneiro
- Departamento
de Química Inorgánica, Facultade de Ciencias, Campus
Terra, Universidade de Santiago de Compostela, Lugo 27002, Galicia, Spain
| | - Mauro Botta
- Dipartimento
di Scienze e Innovazione Tecnologica, Magnetic Resonance Platform
(PRISMA-UPO), Universitá del Piemonte
Orientale, Viale T. Michel
11, Alessandria 15121, Italy
| | - Emilia Iglesias
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - David Esteban-Gómez
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Goran Angelovski
- Laboratory
of Molecular and Cellular Neuroimaging, International Center for Primate
Brain Research (ICPBR), Center for Excellence in Brain Science and
Intelligence Technology (CEBSIT), Chinese
Academy of Sciences (CAS), Shanghai 201602, PR China
| | - Carlos Platas-Iglesias
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
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5
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Fernández-Fariña S, Velo-Heleno I, Martínez-Calvo M, Maneiro M, Pedrido R, González-Noya AM. Schiff Bases Functionalized with T-Butyl Groups as Adequate Ligands to Extended Assembly of Cu(II) Helicates. Int J Mol Sci 2023; 24:ijms24108654. [PMID: 37239998 DOI: 10.3390/ijms24108654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
The study of the inherent factors that influence the isolation of one type of metallosupramolecular architecture over another is one of the main objectives in the field of Metallosupramolecular Chemistry. In this work, we report two new neutral copper(II) helicates, [Cu2(L1)2]·4CH3CN and [Cu2(L2)2]·CH3CN, obtained by means of an electrochemical methodology and derived from two Schiff-based strands functionalized with ortho and para-t-butyl groups on the aromatic surface. These small modifications let us explore the relationship between the ligand design and the structure of the extended metallosupramolecular architecture. The magnetic properties of the Cu(II) helicates were explored by Electron Paramagnetic Resonance (EPR) spectroscopy and Direct Current (DC) magnetic susceptibility measurements.
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Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Isabel Velo-Heleno
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana M González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Uzal-Varela R, Patinec V, Tripier R, Valencia L, Maneiro M, Canle M, Platas-Iglesias C, Esteban-Gómez D, Iglesias E. On the dissociation pathways of copper complexes relevant as PET imaging agents. J Inorg Biochem 2022; 236:111951. [PMID: 35963110 DOI: 10.1016/j.jinorgbio.2022.111951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/15/2022] [Accepted: 07/27/2022] [Indexed: 02/07/2023]
Abstract
Several bifunctional chelators have been synthesized in the last years for the development of new 64Cu-based PET agents for in vivo imaging. When designing a metal-based PET probe, it is important to achieve high stability and kinetic inertness once the radioisotope is coordinated. Different competitive assays are commonly used to evaluate the possible dissociation mechanisms that may induce Cu(II) release in the body. Among them, acid-assisted dissociation tests or transchelation challenges employing EDTA or SOD are frequently used to evaluate both solution thermodynamics and the kinetic behavior of potential metal-based systems. Despite of this, the Cu(II)/Cu(I) bioreduction pathway that could be promoted by the presence of bioreductants still remains little explored. To fill this gap we present here a detailed spectroscopic study of the kinetic behavior of different macrocyclic Cu(II) complexes. The complexes investigated include the cross-bridge cyclam derivative [Cu(CB-TE1A)]+, whose structure was determined using single-crystal X-ray diffraction. The acid-assisted dissociation mechanism was investigated using HClO4 and HCl to analyse the effect of the counterion on the rate constants. The complexes were selected so that the effects of complex charge and coordination polyhedron could be assessed. Cyclic voltammetry experiments were conducted to investigate whether the reduction to Cu(I) falls within the window of common bioreducing agents. The most striking behavior concerns the [Cu(NO2Th)]2+ complex, a 1,4,7-triazacyclononane derivative containing two methylthiazolyl pendant arms. This complex is extremely inert with respect to dissociation following the acid-catalyzed mechanism, but dissociates rather quickly in the presence of a bioreductant like ascorbic acid.
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Affiliation(s)
- Rocío Uzal-Varela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Véronique Patinec
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Raphaël Tripier
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Laura Valencia
- Departamento de Química Inorgánica, Universidade de Vigo, Facultad de Ciencias, 36310 Pontevedra, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Facultade de Ciencias, 27002 Lugo, Spain
| | - Moisés Canle
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
| | - Emilia Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
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7
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Fernández-Fariña S, Martínez-Calvo M, Maneiro M, Seco JM, Zaragoza G, González-Noya AM, Pedrido R. Two Synthetic Approaches to Coinage Metal(I) Mesocates: Electrochemical versus Chemical Synthesis. Inorg Chem 2022; 61:14121-14130. [PMID: 35984909 PMCID: PMC9455603 DOI: 10.1021/acs.inorgchem.2c02243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report two different approaches to isolate neutral and cationic mesocate-type metallosupramolecular architectures derived from coinage monovalent ions. For this purpose, we use a thiocarbohydrazone ligand, H2L (1), conveniently tuned with bulky phosphine groups to stabilize the MI ions and prevent ligand crossing to achieve the selective formation of mesocates. The neutral complexes [Cu2(HL)2] (2), [Ag2(HL)2] (3), and [Au2(HL)2] (4) were prepared by an electrochemical method, while the cationic complexes [Cu2(H2L)2](PF6)2 (5), [Cu2(H2L)2](BF4)2 (6), [Ag2(H2L)2](PF6)2 (7), [Ag4(HL)2](NO3)2 (8), and [Au2(H2L)2]Cl2 (9) were obtained by using a metal salt as the precursor. All of the complexes are neutral or cationic dinuclear mesocates, except the silver nitrate derivative, which exhibits a tetranuclear cluster mesocate architecture. The crystal structures of the neutral and cationic copper(I), silver(I), and gold(I) complexes allow us to analyze the influence of synthetic methodology or the counterion role on both the micro- and macrostructures of the mesocates.
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Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - José M Seco
- Departamento de Química Orgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio CACTUS, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana M González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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8
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Fernández-Fariña S, González-Barcia LM, Romero MJ, García-Tojal J, Maneiro M, Seco JM, Zaragoza G, Martínez-Calvo M, González-Noya AM, Pedrido R. Conversion of a double-tetranuclear cluster silver helicate into a dihelicate via a rare desulfurization process. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01308d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We show the first example of a bisthiosemicarbazone silver double-tetranuclear cluster helicate [Ag4L2]2 obtained by electrochemical synthesis which undergoes a rare desulfurization process giving rise to a cationic silver dihelicate [Ag2(H2L)2]SO4.
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Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Luis M. González-Barcia
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - María J. Romero
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Javier García-Tojal
- Departamento de Química, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - José M. Seco
- Departamento de Química Orgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio CACTUS, Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, 15782, Spain
| | - Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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9
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Rouco L, Alvariño R, Alfonso A, Romero MJ, Pedrido R, Maneiro M. Neuroprotective effects of fluorophore-labelled manganese complexes: Determination of ROS production, mitochondrial membrane potential and confocal fluorescence microscopy studies in neuroblastoma cells. J Inorg Biochem 2021; 227:111670. [PMID: 34864293 DOI: 10.1016/j.jinorgbio.2021.111670] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 02/07/2023]
Abstract
In this work, four manganese(II) complexes derived from the ligands H2L1-H2L4, that incorporate dansyl or tosyl fluorescent dyes, have been investigated in term of their antioxidant properties. Two of the manganese(II) complexes have been newly prepared using the asymmetric half-salen ligand H2L2 and the thiosemicarbazone ligand H2L3. The four organic strands and the manganese complexes have been characterized by different analytical and spectroscopic techniques. The study of the antioxidant behaviour of these two new complexes and other two fluorophore-labelled analogues was tested in SH-SY5Y neuroblastoma cells. These four model complexes 1-4 were found to protect cells from oxidative damage in this human neuronal model, by reducing the release of reactive oxygen species. Complexes 1-4 significantly improved cell survival, with levels between 79.1 ± 0.8% and 130.9 ± 4.1%. Moreover, complexes 3 and 4 were able to restore the mitochondrial membrane potential at 1 μM, with 4 reaching levels higher than 85%, similar to the percentages obtained by the positive control agent cyclosporin A. The incorporation of the fluorescent label in the complexes allowed the study of their ability to enter the human neuroblastoma cells by confocal microscopy.
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Affiliation(s)
- Lara Rouco
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Rebeca Alvariño
- Departamento de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain.
| | - Amparo Alfonso
- Departamento de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - María J Romero
- Departamento de Didácticas Aplicadas, Facultade de Formación do Profesorado, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain.
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Uzal-Varela R, Valencia L, Lalli D, Maneiro M, Esteban-Gómez D, Platas-Iglesias C, Botta M, Rodríguez-Rodríguez A. Understanding the Effect of the Electron Spin Relaxation on the Relaxivities of Mn(II) Complexes with Triazacyclononane Derivatives. Inorg Chem 2021; 60:15055-15068. [PMID: 34618439 PMCID: PMC8527457 DOI: 10.1021/acs.inorgchem.1c02057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Investigating the relaxation of water 1H nuclei induced by paramagnetic Mn(II) complexes is important to understand the mechanisms that control the efficiency of contrast agents used in diagnostic magnetic resonance imaging (MRI). Herein, a series of potentially hexadentate triazacyclononane (TACN) derivatives containing different pendant arms were designed to explore the relaxation of the electron spin in the corresponding Mn(II) complexes by using a combination of 1H NMR relaxometry and theoretical calculations. These ligands include 1,4,7-triazacyclononane-1,4,7-triacetic acid (H3NOTA) and three derivatives in which an acetate group is replaced by sulfonamide (H3NO2ASAm), amide (H2NO2AM), or pyridyl (H2NO2APy) pendants. The analogue of H3NOTA containing three propionate pendant arms (H3NOTPrA) was also investigated. The X-ray structure of the derivative containing two acetate groups and a sulfonamide pendant arm [Mn(NO2ASAm)]- evidenced six-coordination of the ligand to the metal ion, with the coordination polyhedron being close to a trigonal prism. The relaxivities of all complexes at 20 MHz and 25 °C (1.1-1.3 mM-1 s-1) are typical of systems that lack water molecules coordinated to the metal ion. The nuclear magnetic relaxation profiles evidence significant differences in the relaxivities of the complexes at low fields (<1 MHz), which are associated with different spin relaxation rates. The zero field splitting (ZFS) parameters calculated by using DFT and CASSCF methods show that electronic relaxation is relatively insensitive to the nature of the donor atoms. However, the twist angle of the two tripodal faces that delineate the coordination polyhedron, defined by the N atoms of the TACN unit (lower face) and the donor atoms of the pendant arms (upper face), has an important effect in the ZFS parameters. A twist angle close to the ideal value for an octahedral coordination (60°), such as that in [Mn(NOTPrA)]-, leads to a small ZFS energy, whereas this value increases as the coordination polyhedron approaches to a trigonal prism.
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Affiliation(s)
- Rocío Uzal-Varela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
| | - Laura Valencia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - Daniela Lalli
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Facultade de Ciencias, Campus de Lugo, 27002 Lugo, Galicia, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Aurora Rodríguez-Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
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11
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Armstrong K, Barbarino S, Cao XE, Cassiola F, Catlow RA, Claeys M, Conway M, Cowan AJ, de Leeuw NH, Dowson GRM, Fischer N, Ghaderian A, Ghosh S, Kamali AR, Khan S, Kyrimis S, Lawes N, Leitner W, Maneiro M, Manyar H, Marquart W, McCord S, Moore E, North M, Olsbye U, Pant D, Poon J, Quesne MG, Ranocchiari M, Rossi L, Ruiz Esquius J, Shozi M, Sick V, Styring P, Tan J, Tanzer SE, Thomas O, Whiston K, Wolf M. Thermal catalytic conversion: general discussion. Faraday Discuss 2021; 230:124-151. [PMID: 34226907 DOI: 10.1039/d1fd90045e] [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: 11/21/2022]
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12
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Bardow A, Bizzarri C, Cao XE, Cowan AJ, Cummings C, Del Angel Hernandez V, Doan H, Dowson G, Ghosh S, Gil V, Gugujonovic K, Kamali AR, König M, Leitner W, Luo J, Madhav D, Maneiro M, Manyar H, McCord S, Moore E, North M, Pant D, Perry S, Poon J, Rossi L, Ruiz Esquius J, Schreiber M, Shozi M, Sick V, Styring P, Tanveer W, Thomas O, Whiston K, Yu E. Emerging technologies: general discussion. Faraday Discuss 2021; 230:388-412. [PMID: 34231609 DOI: 10.1039/d1fd90048j] [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: 11/21/2022]
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13
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Maneiro M, De Vita E, Conole D, Kounde CS, Zhang Q, Tate EW. PROTACs, molecular glues and bifunctionals from bench to bedside: Unlocking the clinical potential of catalytic drugs. Prog Med Chem 2021; 60:67-190. [PMID: 34147206 DOI: 10.1016/bs.pmch.2021.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The vast majority of currently marketed drugs rely on small molecules with an 'occupancy-driven' mechanism of action (MOA). Therefore, the efficacy of these therapeutics depends on a high degree of target engagement, which often requires high dosages and enhanced drug exposure at the target site, thus increasing the risk of off-target toxicities (Churcher, 2018 [1]). Although small molecule drugs have been successfully used as treatments for decades, tackling a variety of disease-relevant targets with a defined binding site, many relevant therapeutic targets remain challenging to drug due, for example, to lack of well-defined binding pockets or large protein-protein interaction (PPI) interfaces which resist interference (Dang et al., 2017 [2]). In the quest for alternative therapeutic approaches to address different pathologies and achieve enhanced efficacy with reduced side effects, ligand-induced targeted protein degradation (TPD) has gained the attention of many research groups both in academia and in industry in the last two decades. This therapeutic modality represents a novel paradigm compared to conventional small-molecule inhibitors. To pursue this strategy, heterobifunctional small molecule degraders, termed PROteolysis TArgeting Chimeras (PROTACs) have been devised to artificially redirect a protein of interest (POI) to the cellular protein homeostasis machinery for proteasomal degradation (Chamberlain et al., 2019 [3]). In this chapter, the development of PROTACs will first be discussed providing a historical perspective in parallel to the experimental progress made to understand this novel therapeutic modality. Furthermore, common strategies for PROTAC design, including assays and troubleshooting tips will be provided for the reader, before presenting a compendium of all PROTAC targets reported in the literature to date. Due to the recent advancement of these molecules into clinical trials, consideration of pharmacokinetics and pharmacodynamic properties will be introduced, together with the biotech landscape that has developed from the success of PROTACs. Finally, an overview of subsequent strategies for targeted protein degradation will be presented, concluding with further scientific quests triggered by the invention of PROTACs.
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Affiliation(s)
- M Maneiro
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom
| | - E De Vita
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom
| | - D Conole
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom
| | - C S Kounde
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom
| | - Q Zhang
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom
| | - E W Tate
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, London, United Kingdom.
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Affiliation(s)
- Lara Rouco
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Lugo, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Lugo, Spain
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15
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Rouco L, Sánchez-González Á, Alvariño R, Alfonso A, Vázquez-López EM, García-Martínez E, Maneiro M. Combined Effect of Caspase-Dependent and Caspase-Independent Apoptosis in the Anticancer Activity of Gold Complexes with Phosphine and Benzimidazole Derivatives. Pharmaceuticals (Basel) 2020; 14:10. [PMID: 33374177 PMCID: PMC7824672 DOI: 10.3390/ph14010010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/16/2020] [Accepted: 12/21/2020] [Indexed: 12/28/2022] Open
Abstract
Since the potential anticancer activity of auranofin was discovered, gold compounds have attracted interest with a view to developing anticancer agents that follow cytotoxic mechanisms other than cisplatin. Two benzimidazole gold(I) derivatives containing triphenylphosphine (Au(pben)(PPh3)) (1) or triethylphosphine (Au(pben)(PEt3)) (2) were prepared and characterized by standard techniques. X-ray crystal structures for 1 and 2 were solved. The cytotoxicity of 1 and 2 was tested in human neuroblastoma SH-SY5Y cells. Cells were incubated with compounds for 24 h with concentrations ranging from 10 µM to 1 nM, and the half-maximal inhibitory concentration (IC50) was determined. 1 and 2 showed an IC50 of 2.7 and 1.6 µM, respectively. In order to better understand the type of cell death induced by compounds, neuroblastoma cells were stained with Annexin-FITC and propidium iodide. The fluorescence analysis revealed that compounds were inducing apoptosis; however, pre-treatment with the caspase inhibitor Z-VAD did not reduce cell death. Analysis of compound effects on caspase-3 activity and reactive oxygen species (ROS) production in SH-SY5Y cells revealed an antiproliferative ability mediated through oxidative stress and both caspase-dependent and caspase-independent mechanisms.
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Grants
- 2017 GRC GI-1682 (ED431C 2017/01), 2018 GRC-1584 (ED431C 2018/13), MetalBIO network (ED431D 2017/01) Consellería de Cultura, Educación e Ordenación Universitaria, Xunta de Galicia
- CTQ2015-65707-C2-2-P, AGL2016-78728-R (AEI/FEDER, UE), ISCIII/PI16/01830, RTC-2016-5507-2, ITC-20161072 Ministerio de Economía, Industria y Competitividad
- POPTEP 0161-Nanoeaters-1-E-1, Interreg AlertoxNet EAPA-317-2016, Interreg Agritox EAPA-998-2018, H2020 778069-EMERTOX European Union
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Affiliation(s)
- Lara Rouco
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
| | - Ángeles Sánchez-González
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rebeca Alvariño
- Departamento de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
| | - Amparo Alfonso
- Departamento de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
| | - Ezequiel M. Vázquez-López
- Departamento de Química Inorgánica, Facultade de Química, Campus Universitario Lagoas-Marcosende, Universidade de Vigo, 36310 Vigo, Spain; (E.M.V.-L.); (E.G.-M.)
| | - Emilia García-Martínez
- Departamento de Química Inorgánica, Facultade de Química, Campus Universitario Lagoas-Marcosende, Universidade de Vigo, 36310 Vigo, Spain; (E.M.V.-L.); (E.G.-M.)
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain;
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16
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Fernández-Eulate G, Fernández-Torrón R, Guisasola A, Gaspar MTI, Diaz-Manera J, Maneiro M, Zulaica M, Olasagasti V, Formica AF, Espinal JB, Ruiz M, Schlüter A, Pujol A, Poza JJ, López de Munain A. Phenotypic correlations in a large single-center cohort of patients with BSCL2 nerve disorders: a clinical, neurophysiological and muscle magnetic resonance imaging study. Eur J Neurol 2020; 27:1364-1373. [PMID: 32320108 DOI: 10.1111/ene.14272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/16/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE BSCL2 heterozygote mutations are a common cause of distal hereditary motor neuropathies (dHMNs). A series of BSCL2 patients is presented and clinical, neurophysiological and muscle magnetic resonance imaging (MRI) findings are correlated. METHODS Twenty-six patients from five families carrying the p.N88S mutation were identified. Age of onset, clinical phenotype (dHMN, Charcot-Marie-Tooth, spastic paraplegia), physical examination, disability measured as a modified Rankin Scale score and neurophysiological findings were collected. A whole body muscle MRI had been performed in 18 patients. The pattern of muscle involvement on T1-weighted and short time inversion recovery sequences was analysed. Hierarchical analysis using heatmaps and an MRI Composite Score were generated. Statistical analysis was carried out with STATA SE v.15 (TX, USA). RESULTS The mean age was 51.54 ± 19.94 years and 14 patients were men. dHMN was the most common phenotype (50%) and five patients (19.23%) showed no findings on examination. Disease onset was commonly in childhood and disability was low (modified Rankin Scale score 1.34 ± 1.13) although median time since onset of disease was 32 years (range 10-47). Charcot-Marie-Tooth-like patients were more disabled and disability correlated with age. On muscle MRI, thenar eminence, soleus and tibialis anterior were most frequently involved, irrespective of clinical phenotype. MRI Composite Score was strongly correlated with disability. CONCLUSION Patients with the p.N88S BSCL2 gene mutation are phenotypically variable, although dHMN is most frequent and generally slowly progressive. Muscle MRI pattern is consistent regardless of phenotype and correlates with disease severity, probably serving as a reliable outcome measure for future clinical trials.
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Affiliation(s)
- G Fernández-Eulate
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain.,Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, Institute of Myology, Paris, France
| | - R Fernández-Torrón
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain.,Neuromuscular Area, Group of Neurodegenerative Diseases, Biodonostia Health Research Institute, San Sebastian, Spain
| | - A Guisasola
- Department of Radiology, Osatek, San Sebastian, Spain
| | - M T I Gaspar
- Clinical Epidemiology Unit, Donostia University Hospital, San Sebastian, Spain
| | - J Diaz-Manera
- Unitat de Malaties Neuromuscularis, Servei de Neurologia, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.,John Walton Muscular Dystrophy Research Center, University of Newcastle, Newcastle, UK
| | - M Maneiro
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain
| | - M Zulaica
- Neuromuscular Area, Group of Neurodegenerative Diseases, Biodonostia Health Research Institute, San Sebastian, Spain
| | - V Olasagasti
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain
| | - A F Formica
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain
| | - J B Espinal
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain
| | - M Ruiz
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER), Institute of Health Carlos III, Madrid, Spain
| | - A Schlüter
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Spain
| | - A Pujol
- Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Spain.,Center for Biomedical Research on Rare Diseases (CIBERER), Institute of Health Carlos III, Madrid, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain
| | - J J Poza
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain
| | - A López de Munain
- Department of Neurology, Donostia University Hospital, San Sebastian, Spain.,Neuromuscular Area, Group of Neurodegenerative Diseases, Biodonostia Health Research Institute, San Sebastian, Spain.,Neuroscience Department, School of Medicine of the University of the Basque Country, San Sebastian, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto Carlos III, Madrid, Spain
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17
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Rouco L, Liberato A, Fernández-Trujillo MJ, Máñez A, Basallote MG, Alvariño R, Alfonso A, Botana LM, Maneiro M. Salen‑manganese complexes for controlling ROS damage: Neuroprotective effects, antioxidant activity and kinetic studies. J Inorg Biochem 2019; 203:110918. [PMID: 31759263 DOI: 10.1016/j.jinorgbio.2019.110918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 11/04/2019] [Accepted: 11/10/2019] [Indexed: 12/23/2022]
Abstract
A new manganese(III) complex [MnL1(DCA)(H2O)](H2O),1 [H2L1 is the chelating ligand N,N'-bis(2-hydroxy-3-methoxybenzylidene)-1,2-diaminopropane, and DCA is dicyanamide], has been prepared and characterized by different analytical and spectroscopic techniques. The tetragonally elongated octahedral geometry for the manganese coordination sphere was revealed by X-ray diffraction studies for 1. The antioxidant behavior of this complex and other manganese(III)-salen type complexes was tested through superoxide dismutase and catalase probes, and through the study of their neuroprotective effects in SH-SY5Y neuroblastoma cells. In this human neuronal model, these model complexes were found to improve cell survival in an oxidative stress model. During studies aimed to getting a better understanding of the kinetics of the processes involved in this antioxidant behavior, an important effect on the solvent in the kinetics of reaction of the complexes with H2O2 was revealed that suggests a change in the mechanism of reaction of the complexes. The kinetic data in methanol and buffered aqueous solutions correlate well with the results of the test of catalase activity, thus showing that the rate determining step in the catalytic cycle corresponds to the initial reaction of the complexes with H2O2.
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Affiliation(s)
- Lara Rouco
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Andrea Liberato
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain
| | - M Jesús Fernández-Trujillo
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain
| | - Angeles Máñez
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain
| | - Manuel G Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain
| | - Rebeca Alvariño
- Departamento. de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Amparo Alfonso
- Departamento. de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Luis M Botana
- Departamento. de Farmacología, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus Terra, Universidade de Santiago de Compostela, Lugo, Spain.
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Badiani V, Bajada M, Beller M, Bocarsly AB, Bonnet S, Bozal-Ginesta C, Brueggeller P, Butt JN, Cassiola F, Grätzel M, Hammarström L, Hatzell MC, Jeuken LJC, König B, Kuehnel MF, Lawrence J, Lee CY, Maneiro M, Minteer SD, Moore EE, Piper SEH, Plumeré N, Reek JNH, Reisner E, Roy S, Shears J, Shylin SI, Soo HS, Wagner A, Wielend D, Zhang J, Zwijnenburg M. Biological approaches to artificial photosynthesis: general discussion. Faraday Discuss 2019; 215:66-83. [PMID: 31231740 DOI: 10.1039/c9fd90026h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Abe R, Aitchison CM, Andrei V, Beller M, Cheung D, Creissen CE, de la Peña O'Shea VA, Durrant JR, Grätzel M, Hammarström L, Haussener S, In SI, Kalamaras E, Kudo A, Kuehnel MF, Kunturu PP, Lai YH, Lee CY, Maneiro M, Moore EE, Nguyen HC, Paris AR, Pornrungroj C, Reek JNH, Reisner E, Schreck M, Smith WA, Soo HS, Sprick RS, Venugopal A, Wang Q, Wielend D, Zwijnenburg MA. Demonstrator devices for artificial photosynthesis: general discussion. Faraday Discuss 2019; 215:345-363. [PMID: 31231738 DOI: 10.1039/c9fd90023c] [Citation(s) in RCA: 1] [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: 11/21/2022]
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20
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Abe R, Bajada M, Beller M, Bocarsly AB, Butt J, Cassiola F, Domcke W, Durrant JR, Gavrielides S, Grätzel M, Hammarström L, Hatzell MC, König B, Kudo A, Kuehnel MF, Lage A, Lee CY, Maneiro M, Minteer SD, Paris AR, Plumeré N, Reek JNH, Reisner E, Roy S, Schnedermann C, Shankar R, Shylin SI, Smith WA, Soo HS, Wagner A, Wielend D. Beyond artificial photosynthesis: general discussion. Faraday Discuss 2019; 215:422-438. [DOI: 10.1039/c9fd90022e] [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: 11/21/2022]
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21
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Aitchison CM, Andrei V, Antón-García D, Apfel UP, Badiani V, Beller M, Bocarsly AB, Bonnet S, Brueggeller P, Caputo CA, Cassiola F, Clausing ST, Cooper AI, Creissen CE, de la Peña O’Shea VA, Domcke W, Durrant JR, Grätzel M, Hammarström L, Hankin A, Hatzell MC, Karadas F, König B, Kuehnel MF, Lamaison S, Lin CY, Maneiro M, Minteer SD, R. Paris A, Pastor E, Pornrungroj C, Reek JNH, Reisner E, Roy S, Sahm C, Shankar R, Shaw WJ, Shylin SI, Smith WA, Sokol K, Soo HS, Sprick RS, Viertl W, Vogel A, Wagner A, Wakerley D, Wang Q, Wielend D, Zwijnenburg MA. Synthetic approaches to artificial photosynthesis: general discussion. Faraday Discuss 2019; 215:242-281. [DOI: 10.1039/c9fd90024a] [Citation(s) in RCA: 3] [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: 11/21/2022]
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22
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Romero MJ, Martínez-Calvo M, Maneiro M, Zaragoza G, Pedrido R, González-Noya AM. Selective Metal-Assisted Assembly of Mesocates or Helicates with Tristhiosemicarbazone Ligands. Inorg Chem 2018; 58:881-889. [DOI: 10.1021/acs.inorgchem.8b02996] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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)
- María J. Romero
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, Galicia E-15782, Spain
| | - Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, Galicia E-15782, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, Campus Terra, E-27002 Lugo, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio CACTUS, Universidade de Santiago de Compostela, Campus Sur, Santiago de Compostela, Galicia E-15782, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, Galicia E-15782, Spain
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, Galicia E-15782, Spain
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23
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Liberato A, Fernández-Trujillo MJ, Máñez Á, Maneiro M, Rodríguez-Silva L, Basallote MG. Pitfalls in the ABTS Peroxidase Activity Test: Interference of Photochemical Processes. Inorg Chem 2018; 57:14471-14475. [DOI: 10.1021/acs.inorgchem.8b02525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrea Liberato
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Avda. República Saharahui s/n, Puerto Real, 11510 Cádiz, Spain
| | - M. Jesús Fernández-Trujillo
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Avda. República Saharahui s/n, Puerto Real, 11510 Cádiz, Spain
| | - Ángeles Máñez
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Avda. República Saharahui s/n, Puerto Real, 11510 Cádiz, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus de Lugo, Universidade de Santiago de Compostela, Avda. Alfonso X s/n, Lugo 27002, Spain
| | - Laura Rodríguez-Silva
- Departamento de Química Inorgánica, Facultade de Ciencias, Campus de Lugo, Universidade de Santiago de Compostela, Avda. Alfonso X s/n, Lugo 27002, Spain
| | - Manuel G. Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Avda. República Saharahui s/n, Puerto Real, 11510 Cádiz, Spain
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24
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Romero MJ, Suárez V, Fernández-Fariña S, Maneiro M, Martínez-Núñez E, Zaragoza G, González-Noya AM, Pedrido R. Effect of the Metal Ion on the Enantioselectivity and Linkage Isomerization of Thiosemicarbazone Helicates. Chemistry 2017; 23:4884-4892. [PMID: 28207181 DOI: 10.1002/chem.201700195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Indexed: 11/11/2022]
Abstract
The effect of the metal ion and ligand design on the enantioselectivity and linkage isomerization of neutral cobalt and zinc bisthiosemicarbazone metallohelicates has been investigated in this work. The electrochemical synthesis has afforded the enantioselective formation of chirally pure cobalt helicates, and the ΛΛ isomer of a single enantiomer has been crystallized as only product for the cobalt methyl-substituted thiosemicarbazone helicate. Interestingly linkage isomers have been formed from zinc ethyl-substituted thiosemicarbazone helicate enantiomers for the first time. The co-existence of these isomers has been evaluated from the point of view of both experimental results and computational calculations.
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Affiliation(s)
- María J Romero
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
| | - Vanesa Suárez
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
| | - Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002, Lugo, Spain
| | - Emilio Martínez-Núñez
- Departamento de Química Física, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio CACTUS, Universidade de Santiago de Compostela, Campus Sur, Santiago de Compostela, Galicia, 15782, Spain
| | - Ana M González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain
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25
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González-Barcia LM, Romero MJ, González Noya AM, Bermejo MR, Maneiro M, Zaragoza G, Pedrido R. “The Golden Method”: Electrochemical Synthesis Is an Efficient Route to Gold Complexes. Inorg Chem 2016; 55:7823-5. [DOI: 10.1021/acs.inorgchem.6b01362] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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)
- Luis M. González-Barcia
- Departamento de Química Inorgánica,
Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, E-15782, Santiago de Compostela, Spain
| | - María J. Romero
- Departamento de Química Inorgánica,
Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, E-15782, Santiago de Compostela, Spain
| | - Ana M. González Noya
- Departamento de Química Inorgánica,
Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, E-15782, Santiago de Compostela, Spain
| | - Manuel R. Bermejo
- Departamento de Química Inorgánica,
Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, E-15782, Santiago de Compostela, Spain
| | - Marcelino Maneiro
- Departamento
de Química Inorgánica, Facultade de Ciencias, Campus
de Lugo, Universidade de Santiago de Compostela, Avenida Alfonso X s/n, 24002, Lugo, Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, Edificio Cactus, Campus
Vida, Universidade de Santiago de Compostela, E-15782, Santiago
de Compostela, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica,
Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avenida das Ciencias s/n, E-15782, Santiago de Compostela, Spain
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26
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Romero MJ, Carballido R, Rodríguez-Silva L, Maneiro M, Zaragoza G, González-Noya AM, Pedrido R. An unusual assembled Pb(ii) meso-helicate that shows the inert pair effect. Dalton Trans 2016; 45:16162-16165. [DOI: 10.1039/c6dt03106d] [Citation(s) in RCA: 7] [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: 11/21/2022]
Abstract
We report on a meso-helicate exhibiting the inert pair effect for the first time, demonstrating that this effect must be considered for the controlled assembly of Pb(ii) supramolecular helicates/mesocates.
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Affiliation(s)
- María J. Romero
- Departamento de Química Inorgánica
- Facultade de Química
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
| | - Rocío Carballido
- Departamento de Química Inorgánica
- Facultade de Química
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
| | - Laura Rodríguez-Silva
- Departamento de Química Inorgánica
- Facultade de Ciencias
- Universidade de Santiago de Compostela
- Lugo
- Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica
- Facultade de Ciencias
- Universidade de Santiago de Compostela
- Lugo
- Spain
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X
- Edificio CACTUS
- Universidade de Santiago de Compostela
- Santiago de Compostela
- Spain
| | - Ana M. González-Noya
- Departamento de Química Inorgánica
- Facultade de Química
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
| | - Rosa Pedrido
- Departamento de Química Inorgánica
- Facultade de Química
- Campus Vida
- Universidade de Santiago de Compostela
- Santiago de Compostela
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González-Riopedre G, Bermejo MR, Fernández-García MI, González-Noya AM, Pedrido R, Rodríguez-Doutón MJ, Maneiro M. Alkali-Metal-Ion-Directed Self-Assembly of Redox-Active Manganese(III) Supramolecular Boxes. Inorg Chem 2015; 54:2512-21. [DOI: 10.1021/ic501842x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Gustavo González-Riopedre
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Manuel R. Bermejo
- Centro de Investigación en Química
Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M. Isabel Fernández-García
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Ana M. González-Noya
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
- Centro de Investigación en Química
Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rosa Pedrido
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
- Centro de Investigación en Química
Biolóxica e Materiais Moleculares, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M. Jesús Rodríguez-Doutón
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Marcelino Maneiro
- Departamento de
Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain
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Pikramenou Z, Weinstein J, Pan Q, Lewis F, Bassani DM, Würthner F, Moucheron C, Slota M, Díaz-Moscoso A, Karlsson J, Basílio N, Adams D, Scandola F, Bohne C, Lemon C, Campagna S, Rohacova J, Ohashi K, Plötz PA, Monti F, Kelly JM, Keane P, Gibson E, Lemercier G, Ruggi A, Cucinotta F, Gust D, Bradberry S, Vos J, Pistolis G, Mauro M, Tuite E, De Cola L, Ceroni P, Maneiro M, Galoppini E, Gunnlaugsson T. Self-organization of photo-active nanostructures: general discussion. Faraday Discuss 2015; 185:529-48. [DOI: 10.1039/c5fd90092a] [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: 11/21/2022]
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Bohne C, Pan Q, Ceroni P, Börjesson K, Rohacova J, Lewis F, Vlcek A, Bassani DM, Würthner F, Sartorel A, de Silva AP, Nocera D, Scandola F, Lemon C, Allain C, Brudvig GW, Marchesan S, Sundstrom V, Campagna S, Sheehan SW, Plötz PA, Monti F, Kelly JM, Gibson E, Maneiro M, Harriman A, Ruggi A, Galoppini E, Thummel R, Weinstein J, Vos J, Ishitani O, Gust D, Díaz-Moscoso A. Natural and artificial photosynthesis: general discussion. Faraday Discuss 2015; 185:187-217. [DOI: 10.1039/c5fd90089a] [Citation(s) in RCA: 3] [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: 11/21/2022]
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30
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Romero MJ, Pedrido R, González-Noya AM, Maneiro M, Fernández-García MI, Zaragoza G, Bermejo MR. Versatile coordination behaviour of an asymmetric half-salen ligand bearing a dansyl fluorophore. Dalton Trans 2012; 41:10832-44. [DOI: 10.1039/c2dt31093g] [Citation(s) in RCA: 14] [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: 12/14/2022]
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31
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Vázquez-Fernández MÁ, Fernández-García MI, González-Riopedre G, Maneiro M, Rodríguez-Doutón MJ. Self-assembled biomimetic catalysts: studies of the catalase and peroxidase activities of Mn(III)-Schiff base complexes. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.633164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- M. Ángeles Vázquez-Fernández
- a Departamento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Avda. Alfonso X, Lugo E-27002, Spain
| | - M. Isabel Fernández-García
- a Departamento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Avda. Alfonso X, Lugo E-27002, Spain
| | - Gustavo González-Riopedre
- a Departamento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Avda. Alfonso X, Lugo E-27002, Spain
| | - Marcelino Maneiro
- a Departamento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Avda. Alfonso X, Lugo E-27002, Spain
| | - M. Jesús Rodríguez-Doutón
- b Department of Chemistry and INSTM Research Unit , University of Modena and Reggio Emilia , Via G. Campi 183, 41100 Modena, Italy
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Vázquez-Fernández MÁ, Bermejo MR, Fernández-García MI, González-Riopedre G, Rodríguez-Doutón MJ, Maneiro M. Influence of the geometry around the manganese ion on the peroxidase and catalase activities of Mn(III)-Schiff base complexes. J Inorg Biochem 2011; 105:1538-47. [PMID: 22071076 DOI: 10.1016/j.jinorgbio.2011.09.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 09/01/2011] [Accepted: 09/01/2011] [Indexed: 10/17/2022]
Abstract
The peroxidase and catalase activities of eighteen manganese-Schiff base complexes have been studied. A correlation between the structure of the complexes and their catalytic activity is discussed on the basis of the variety of systems studied. Complexes 1-18 have the general formulae [MnL(n)(D)(2)](X)(H(2)O/CH(3)OH)(m), where L(n)=L(1)-L(13); D=H(2)O, CH(3)OH or Cl; m=0-2.5 and X=NO(3)(-), Cl(-), ClO(4)(-), CH(3)COO(-), C(2)H(5)COO(-) or C(5)H(11)COO(-). The dianionic tetradentate Schiff base ligands H(2)L(n) are the result of the condensation of different substituted (OMe-, OEt-, Br-, Cl-) hydroxybenzaldehyde with diverse diamines (1,2-diaminoethane for H(2)L(1)-H(2)L(2); 1,2-diamino-2-methylethane for H(2)L(3)-H(2)L(4); 1,2-diamino-2,2-dimethylethane for H(2)L(5); 1,2-diphenylenediamine for H(2)L(6)-H(2)L(7); 1,3-diaminopropane for H(2)L(8)-H(2)L(11); 1,3-diamino-2,2-dimethylpropane for H(2)L(12)-H(2)L(13)). The new Mn(III) complexes [MnL(1)(H(2)O)Cl](H(2)O)(2.5) (2), [MnL(2)(H(2)O)(2)](NO(3))(H(2)O) (4), [MnL(6)(H(2)O)(2)][MnL(6)(CH(3)OH)(H(2)O)](NO(3))(2)(CH(3)OH) (8), [MnL(6)(H(2)O)(OAc)](H(2)O) (9) and [MnL(7)(H(2)O)(2)](NO(3))(CH(3)OH)(2) (12) were isolated and characterised by elemental analysis, magnetic susceptibility and conductivity measurements, redox studies, ESI spectrometry and UV, IR, paramagnetic (1)H NMR, and EPR spectroscopies. X-ray crystallographic studies of these complexes and of the ligand H(2)L(6) are also reported. The crystal structures of the rest of the complexes have been previously published and herein we have only revised their study by those techniques still not reported (EPR and (1)H NMR for some of these compounds) and which help to establish their structures in solution. Complexes 1-12 behave as more efficient mimics of peroxidase or catalase in contrast with 13-18. The analysis between the catalytic activity and the structure of the compounds emphasises the significance of the existence of a vacant or a labile position in the coordination sphere of the catalyst.
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Affiliation(s)
- M Ángeles Vázquez-Fernández
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, Lugo, Galicia, Spain
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de la Riva P, Maneiro M, Martí-Massó JF, López de Munain A. Hypoxic ischaemic encephalopathy: lesions on magnetic resonance. Neurologia 2011; 26:371-2. [PMID: 21345537 DOI: 10.1016/j.nrl.2010.12.005] [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] [Received: 09/21/2010] [Revised: 11/03/2010] [Accepted: 12/01/2010] [Indexed: 10/18/2022] Open
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34
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González-Riopedre G, Fernández-García MI, González-Noya AM, Vázquez-Fernández MÁ, Bermejo MR, Maneiro M. Manganese-Schiff base complexes as catalysts for water photolysis. Phys Chem Chem Phys 2011; 13:18069-77. [DOI: 10.1039/c1cp21154d] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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35
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Maneiro M, Villanúa J, Martí Massó JF. [Early Wallerian degeneration after internal capsule infarction]. Neurologia 2009; 24:200-201. [PMID: 19418297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Affiliation(s)
- M Maneiro
- Servicio de Neurología, Hospital Donostia, Osatek, S.A., Resonancia Magnética, San Sebastián
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36
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Bermejo MR, González-Noya AM, Martínez-Calvo M, Pedrido R, Maneiro M, Fernández MI, Gómez-Fórneas E. New Neutral Metal Complexes from the 4-N-Phenylthiosemicarbazone-2-pyridinecarboxaldehyde Ligand –113Cd and207Pb NMR Studies. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700274] [Citation(s) in RCA: 11] [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: 11/06/2022]
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37
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Bermejo MR, Fernández MI, Gómez-Fórneas E, González-Noya A, Maneiro M, Pedrido R, Rodríguez MJ. Self-Assembly of Dimeric MnIII–Schiff-Base Complexes Tuned by Perchlorate Anions. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700199] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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38
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Bermejo MR, González-Noya AM, Martínez-Calvo M, Pedrido R, Romero MJ, Fernández MI, Maneiro M. Electrochemical Synthesis: a Convenient Method for the Preparation of Neutral Metal Complexes with a Thiosemicarbazone Ligand. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700026] [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: 11/10/2022]
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39
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Rodríguez‐Doutón MJ, Fernández MI, González‐Noya AM, Maneiro M, Pedrido R, Romero MJ. Novel Manganese(III) Complexes with the Schiff Base N,N′‐(1,2‐Phenylene)‐bis(3‐Hydroxysalicylidenimine). ACTA ACUST UNITED AC 2007. [DOI: 10.1080/15533170600962430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- M. J. Rodríguez‐Doutón
- a Departmento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Lugo, Spain
| | - M. Isabel Fernández
- a Departmento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Lugo, Spain
| | - A. M. González‐Noya
- a Departmento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Lugo, Spain
| | - M. Maneiro
- a Departmento de Química Inorgánica, Facultade de Ciencias , Universidade de Santiago de Compostela , Lugo, Spain
| | - R. Pedrido
- b Departmento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , Santiago de Compostela, Spain
| | - M. J. Romero
- b Departmento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , Santiago de Compostela, Spain
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Sanmartin J, Bermejo MR, Fondo M, Garcia-Deibe AM, Maneiro M, McAuliffe CA, Pritchard RG. THE CRYSTAL STRUCTURES OF [(4-MepyO)2H](I− 3) AND [Co(4-EtO2CpyO)6](I2 8 −), PRODUCTS OF AEROBIC DECOMPOSITION FROM ETHANOLIC SOLUTIONS OF SO2 ADDUCTS CONTAINING PYRIDINE-N-OXIDE DERIVATIVES. J COORD CHEM 2006. [DOI: 10.1080/00958979908027958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. Sanmartin
- a Departamento de Quimica Inorgdnica, Facultade de Quimica , Universidade de Santiago de Compostela , Santiago de Compostela, Galicia, E-15706, Spain
| | - M. R. Bermejo
- a Departamento de Quimica Inorgdnica, Facultade de Quimica , Universidade de Santiago de Compostela , Santiago de Compostela, Galicia, E-15706, Spain
| | - M. Fondo
- a Departamento de Quimica Inorgdnica, Facultade de Quimica , Universidade de Santiago de Compostela , Santiago de Compostela, Galicia, E-15706, Spain
| | - A. M. Garcia-Deibe
- a Departamento de Quimica Inorgdnica, Facultade de Quimica , Universidade de Santiago de Compostela , Santiago de Compostela, Galicia, E-15706, Spain
| | - M. Maneiro
- a Departamento de Quimica Inorgdnica, Facultade de Quimica , Universidade de Santiago de Compostela , Santiago de Compostela, Galicia, E-15706, Spain
| | - C. A. McAuliffe
- b Department of Chemistry , University of Manchester Institute of Science and Technology , P. O. Box 88, Manchester, M601QD, United Kingdom
| | - R. G. Pritchard
- b Department of Chemistry , University of Manchester Institute of Science and Technology , P. O. Box 88, Manchester, M601QD, United Kingdom
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41
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Affiliation(s)
- M. R. Bermejo
- a Departamento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , E-15706, Santiago de Compostela, Spain
| | - A. M. González
- a Departamento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , E-15706, Santiago de Compostela, Spain
| | - M. Maneiro
- a Departamento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , E-15706, Santiago de Compostela, Spain
| | - M. Rey
- a Departamento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , E-15706, Santiago de Compostela, Spain
| | - M. Vázquez
- a Departamento de Química Inorgánica, Facultade de Química , Universidade de Santiago de Compostela , E-15706, Santiago de Compostela, Spain
| | - O. L. Hoyos
- b Departamento de Química , Universidad del Cauca , Popayán, Colombia
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Bermejo MR, Fernández MI, González-Noya AM, Maneiro M, Pedrido R, Rodríguez MJ, García-Monteagudo JC, Donnadieu B. Novel peroxidase mimics: μ-Aqua manganese–Schiff base dimers. J Inorg Biochem 2006; 100:1470-8. [PMID: 16790277 DOI: 10.1016/j.jinorgbio.2006.04.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2005] [Revised: 04/04/2006] [Accepted: 04/06/2006] [Indexed: 11/26/2022]
Abstract
The interaction of manganese(II) carboxylate salts [Mn(O(2)CR)(2), where R=ethane, pentane] with H(2)L(1) [N,N'-bis(3-methoxy-2-hydroxybenzaldehyde)-1,2-phenylenediamine] and H(2)L(2) [N,N'-bis(3-ethoxy-2-hydroxybenzaldehyde)-1,2-phenylenediamine] was studied. MnL(1)(O(2)CEt)(H(2)O) (1), MnL(1)(O(2)CPe(n))(H(2)O) (2), MnL(2)(O(2)CEt)(H(2)O)(2) (3) and MnL(2)(O(2)CPe(n))(H(2)O)(2) (4) were isolated and thoroughly characterised by elemental analysis, FAB mass spectrometry, infrared and (1)H NMR spectroscopy, magnetic susceptibility measurements, molar conductivities, and cyclic and normal pulse voltammetry. Compounds 1 and 2 were crystallographically characterised revealing a tetragonally elongated octahedral geometry for the manganese coordination sphere and also a dimeric nature through mu-aqua bridges. Complexes 1-4 behave as efficient peroxidase mimics in the presence of the water-soluble trap ABTS, probably due to their ease to coordinate the substrate molecule. A correlation between rhombicity of the complexes and peroxidase activity has also been established.
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Affiliation(s)
- Manuel R Bermejo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Avda. das Ciencias, s/n, Santiago de Compostela, Galicia E-15782, Spain.
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Pedrido R, Romero MJ, Bermejo MR, González-Noya AM, Maneiro M, Rodríguez MJ, Zaragoza G. Influence of the metal size in the structure of the complexes derived from a pentadentate [N3O2] hydrazone. Dalton Trans 2006:5304-14. [PMID: 17088970 DOI: 10.1039/b610010d] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of the metal size in the nuclearity of the complexes derived from the hydrazone ligand 2,6-bis(1-salicyloylhydrazonoethyl)pyridine [H(4)daps] has been investigated. We have synthesised a series of new complexes [M(H(x)daps)] x yH(2)O, (x = 2,3; y = 0-3) with M = Ag (1), Cd (2), Al (3), Sn (4) and Pb (6), using an electrochemical procedure. The crystal and molecular structures have been determined for the mononuclear complexes [Sn(H(2)daps)(H(2)O)(2)] x 4H(2)O (5) and [Pb(H(2)daps)(CN)][Et(4)N] (7). Complex is the first neutral Sn(II) complex derived from a pentadentate hydrazone Schiff base ligand. Complex shows the lead coordinated to the hydrazone donor set and a cyanide ligand, being the first reported complex with the lead atom coordinated to a monodentate cyanide group. Additionally, we have synthesised the lead complex using chemical conditions, in the presence of sodium cyanide which allowed us to isolate the neutral complex [Pb(H(2)daps)] (8). Evaporation of these mother liquors led the novel compound [Pb(Hdaphs)(CH(3)COO)] (9). Complex 9 shows the initial ligand hydrolysed in one of the imine bonds giving rise to a new tetradentate ligand [H(2)daphs] coordinated to the lead atom and a bidentate acetate group. Moreover, the solution behaviour of the complexes has been investigated by (1)H, (113)Cd, (117)Sn and (207)Pb NMR techniques. In particular multinuclear NMR has provided new useful data to correlate factors such as oxidation state, coordination number and nature of the kernel donor atoms due to the new coordination found in complexes 5 and 7. The comparative study of the structures of the complexes derived from this pentadentate [N(3)O(2)] hydrazone ligand let us to conclude that the metal size is a key factor to control the nuclearity of the complexes derived from the ligand [H(4)daps].
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Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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Pedrido R, Bermejo MR, Romero MJ, González-Noya AM, Maneiro M, Fernández MI. The first [5+5] isomer of a Zn(II) dimer helicate derived from pentadentate thiosemicarbazones. INORG CHEM COMMUN 2005. [DOI: 10.1016/j.inoche.2005.08.009] [Citation(s) in RCA: 7] [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: 10/25/2022]
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Maneiro M, Fernández B, Gómez-Fórneas E, Rodríguez MJ, Pedrido R, Romero MJ, Bermejo MR. Fixation of Sulphur Dioxide by Manganese(II)-Schiff Base Complexes: Thermal Stability of these Adducts and the Possible Conversion of the Coordinated SO2 to Sulphate. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570004] [Citation(s) in RCA: 4] [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: 11/10/2022]
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González-Noya AM, Fernández MI, Maneiro M, Rodríguez MJ, Pedrido R, Vázquez M, Bermejo MR. Interaction of Mn(acac)3 with Asymmetrical Schiff Base Ligands containing an Amido Group. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570035] [Citation(s) in RCA: 2] [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: 11/07/2022]
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Rodríguez MJ, Fernández MI, González-Noya AM, Maneiro M, Pedrido R, Vázquez M, Donnadieu B, Bermejo MR. Electrochemical Synthesis of MII Complexes with a Schiff Base containing an Amido Group. Crystal Structure of a Cobalt(II) Complex with a Reorganised Ligand. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570034] [Citation(s) in RCA: 5] [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: 11/12/2022]
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Pedrido R, Bermejo MR, Romero MJ, Vázquez M, González-Noya AM, Maneiro M, Rodríguez MJ, Fernández MI. Syntheses and X-ray characterization of metal complexes with the pentadentate thiosemicarbazone ligand bis(4-N-methylthiosemicarbazone)-2,6-diacetylpyridine. The first pentacoordinate lead(II) complex with a pentagonal geometry. Dalton Trans 2004:572-9. [PMID: 15672203 DOI: 10.1039/b416296j] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [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: 11/21/2022]
Abstract
In this paper we describe the electrochemical synthesis and characterization of new neutral manganese, iron, cobalt, nickel, copper, zinc, cadmium and lead complexes with the ligand bis(4-N-methylthiosemicarbazone)-2,6-diacetylpyridine, H4DAPTsz-Me. X-Ray structures of [Mn(H2DAPTsz-Me)(EtOH)2] 1, [Pb(H2DAPTsz-Me)] 3 and [Zn(H2DAPTsz-Me)]2.EtOH.2H2O 4, were also determined. In these complexes the ligand behaves as bis-deprotonated and SNNNS pentadentate. In the manganese complex the metal is heptacoordinated, in a distorted pentagonal-bipyramidal environment, with the N3S2 donor set of the ligand in the pentagonal girdle and two solvent molecules occupying the axial positions. In the lead complex 3 the metal is pentacoordinated, bound exclusively to the five donor atoms of the ligand, as a consequence of the existence of "inert pair effect". The bishelical zinc complex 4 shows each zinc atom with different coordination geometry, one octahedrally six-coordinate while the other is distorted tetrahedrally four-coordinate.
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Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Bermejo M, González‐Noya A, Abad V, Fernández M, Maneiro M, Pedrido R, Vázquez M. Formation of Novel 1‐D Chains by μ‐Amido Bridging of Dinuclear Manganese(
III
)‐Schiff Base Complexes. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400198] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Manuel R. Bermejo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana M. González‐Noya
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain, Fax: (internat.) +34‐981‐597‐525
| | - Víctor Abad
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M. Isabel Fernández
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain, Fax: (internat.) +34‐981‐597‐525
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002 Lugo, Spain, Fax: (internat.) +34‐981‐597‐525
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Miguel Vázquez
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Bermejo M, Fernández M, González-Noya A, Maneiro M, Pedrido R, Rodríguez M, Vázquez M. Chloride as Supramolecular Glue: Anion-Directed Assembly of a 2D Network of MnIII Complexes. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200400041] [Citation(s) in RCA: 26] [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] [Indexed: 11/10/2022]
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