1
|
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.
Collapse
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.
| |
Collapse
|
2
|
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.
Collapse
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.)
| |
Collapse
|
3
|
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.
Collapse
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.)
| |
Collapse
|
4
|
Jiménez-Pérez A, Fernández-Fariña S, Pedrido R, García-Tojal J. Desulfurization of thiosemicarbazones: the role of metal ions and biological implications. J Biol Inorg Chem 2024; 29:3-31. [PMID: 38148423 DOI: 10.1007/s00775-023-02037-7] [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: 07/06/2023] [Accepted: 09/26/2023] [Indexed: 12/28/2023]
Abstract
Thiosemicarbazones are biologically active substances whose structural formula is formed by an azomethine, an hydrazine, and a thioamide fragments, to generate a R2C=N-NR-C(=S)-NR2 backbone. These compounds often act as ligands to generate highly stable metal-organic complexes. In certain experimental conditions, however, thiosemicarbazones undergo reactions leading to the cleavage of the chain. Sometimes, the breakage involves desulfurization processes. The present work summarizes the different chemical factors that influence the desulfurization reactions of thiosemicarbazones, such as pH, the presence of oxidant reactants or the establishment of redox processes as those electrochemically induced, the effects of the solvent, the temperature, and the electromagnetic radiation. Many of these reactions require coordination of thiosemicarbazones to metal ions, even those present in the intracellular environment. The nature of the products generated in these reactions, their detection in vivo and in vitro, together with the relevance for the biological activity of these compounds, mainly as antineoplastic agents, is discussed.
Collapse
Affiliation(s)
- Alondra Jiménez-Pérez
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001, Burgos, Spain
| | - Sandra Fernández-Fariña
- 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.
| | - Javier García-Tojal
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001, Burgos, Spain.
| |
Collapse
|
5
|
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.
Collapse
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
| |
Collapse
|
6
|
Fernández-Fariña S, Velo-Heleno I, Carballido R, Martínez-Calvo M, Barcia R, Palacios Ò, Capdevila M, González-Noya AM, Pedrido R. Exploring the Biological Properties of Zn(II) Bisthiosemicarbazone Helicates. Int J Mol Sci 2023; 24:ijms24032246. [PMID: 36768568 PMCID: PMC9916454 DOI: 10.3390/ijms24032246] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/20/2023] [Indexed: 01/24/2023] Open
Abstract
The design of artificial helicoidal molecules derived from metal ions with biological properties is one of the objectives within metallosupramolecular chemistry. Herein, we report three zinc helicates derived from a family of bisthiosemicarbazone ligands with different terminal groups, Zn2(LMe)2∙2H2O 1, Zn2(LPh)2∙2H2O 2 and Zn2(LPhNO2)23, obtained by an electrochemical methodology. These helicates have been fully characterized by different techniques, including X-ray diffraction. Biological studies of the zinc(II) helicates such as toxicity assays with erythrocytes and interaction studies with proteins and oligonucleotides were performed, demonstrating in all cases low toxicity and an absence of covalent interaction with the proteins and oligonucleotides. The in vitro cytotoxicity of the helicates was tested against MCF-7 (human breast carcinoma), A2780 (human ovarian carcinoma cells), NCI-H460 (human lung carcinoma cells) and MRC-5 (normal human lung fibroblasts), comparing the IC50 values with cisplatin. We will try to demonstrate if the terminal substituent of the ligand precursor exerts any effect in toxicity or in the antitumor activity of the zinc helicates.
Collapse
Affiliation(s)
- Sandra Fernández-Fariña
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Correspondence: (S.F.-F.); (A.M.G.-N.)
| | - Isabel Velo-Heleno
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Rocío Carballido
- 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
| | - Ramiro Barcia
- Departamento de Bioquímica y Biología Molecular, Facultade de Veterinaria, Campus Terra, Universidade de Santiago de Compostela, 27002 Lugo, Spain
| | - Òscar Palacios
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Mercè Capdevila
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Correspondence: (S.F.-F.); (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
| |
Collapse
|
7
|
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.
Collapse
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
| |
Collapse
|
8
|
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.
Collapse
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
| |
Collapse
|
9
|
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.
Collapse
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.
| |
Collapse
|
10
|
Sanchez Díaz-Marta A, Yáñez S, Tubío CR, Barrio VL, Piñeiro Y, Pedrido R, Rivas J, Amorín M, Guitián F, Coelho A. Multicatalysis Combining 3D-Printed Devices and Magnetic Nanoparticles in One-Pot Reactions: Steps Forward in Compartmentation and Recyclability of Catalysts. ACS Appl Mater Interfaces 2019; 11:25283-25294. [PMID: 31268288 DOI: 10.1021/acsami.9b08119] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A tricatalytic compartmentalized system that immobilizes metallic species to perform one-pot sequential functionalization is described: a three-dimensional (3D)-printed palladium monolith, ferritic copper(I) magnetic nanoparticles, and a 3D-printed polypropylene capsule-containing copper(II) loaded onto polystyrene-supported 1,5,7-triazabicyclo[4.4.0]dec-5-ene (PS-TBD) allowed the rapid synthesis of diverse substituted 1-([1,1'-biphenyl]-4-yl)-1H-1,2,3-triazoles. The procedure is based on the Chan-Lam azidation/copper alkyne-azide cycloaddition/Suzuki reaction strategy in the solution phase. This catalytic system enabled the efficient assembly of the final compounds in high yields without the need for special additives or intermediate isolation. The monolithic catalyst-containing immobilized palladium species was synthesized by surface chemical modification of a 3D-printed silica monolith using a soluble polyimide resin as a key reagent, thus creating an extremely robust composite. All three immobilized catalysts described here were easily recovered and reused in numerous cycles. This work exemplifies the role of 3D printing in the design and manufacture of devices for compartmented multicatalytic systems to carry out complex one-pot transformations.
Collapse
Affiliation(s)
| | | | - Carmen R Tubío
- BCMaterials, Basque Center for Materials, Applications, and Nanostructures , UPV/EHU , Science Park, 48940 Leioa , Spain
| | - V Laura Barrio
- Escuela de Ingeniería , Universidad del País Vasco (UPV/EHU) , Plaza Ingeniero Torres Quevedo , 48013 , Bilbao , Spain
| | | | | | | | | | | | | |
Collapse
|
11
|
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
| |
Collapse
|
12
|
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.
Collapse
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
| |
Collapse
|
13
|
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
| |
Collapse
|
14
|
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.
Collapse
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
| |
Collapse
|
15
|
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
| |
Collapse
|
16
|
Martínez-Calvo M, Romero MJ, Pedrido R, González-Noya AM, Zaragoza G, Bermejo MR. Metal self-recognition: a pathway to control the formation of dihelicates and mesocates. Dalton Trans 2012; 41:13395-404. [DOI: 10.1039/c2dt31770b] [Citation(s) in RCA: 15] [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: 11/21/2022]
|
17
|
Martínez-Calvo M, Pedrido R, González-Noya AM, Cwiklinska M, Zaragoza G, Bermejo MR. Chains or grids of cadmium(ii) helicates? CrystEngComm 2012. [DOI: 10.1039/c2ce25551k] [Citation(s) in RCA: 5] [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]
|
18
|
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]
|
19
|
|
20
|
Martínez-Calvo M, Vázquez López M, Pedrido R, González-Noya AM, Bermejo MR, Monzani E, Casella L, Sorace L. Endogenous arene hydroxylation promoted by copper(I) cluster helicates. Chemistry 2011; 16:14175-80. [PMID: 20967897 DOI: 10.1002/chem.201001285] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A novel neutral triple-stranded hexanuclear copper(I) cluster helicate [Cu(I)(6)L(3)]·2CH(3)CN derived from a thiosemicarbazone ligand could be synthesized and crystallographically characterized. The MALDI mass spectrum of this complex suggests that the tetranuclear copper(I) cluster helicate [Cu(I)(4)L(2)] is also present in solution. These copper(I) cluster helicates are capable, in the presence of O(2), of hydroxylating the arene linker of their supporting ligand strands. The resulting dinuclear complex [Cu(II)(2)L'(OH)] is formed by two copper(II) centers, a new ligand arising from the hydroxylation reaction, and one hydroxide group. The magnetic investigation of this compound shows a strong antiferromagnetic coupling between the two Cu(II) centers. The kinetic studies for the hydroxylation process show values of ΔH(≠)=-70 kJ mol(-1), similar to those mediated by the tyrosinase enzymes.
Collapse
Affiliation(s)
- Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Martínez-Calvo M, Pedrido R, González-Noya AM, Romero MJ, Cwiklinska M, Zaragoza G, Bermejo MR. A sequentially assembled grid composed of supramolecular meso-helical nodes. Chem Commun (Camb) 2011; 47:9633-5. [DOI: 10.1039/c1cc13582a] [Citation(s) in RCA: 11] [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]
|
22
|
Castiñeiras A, Pedrido R. A thiosemicarbazone ligand functionalized by a phosphine group: Reactivity toward coinage metal ions. Dalton Trans 2010; 39:3572-84. [DOI: 10.1039/b918962a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Romero MJ, Pedrido R, González-Noya AM, Martínez-Calvo M, Zaragoza G, Bermejo MR. A water reduction process performed by zinc metal under very mild conditions. Chem Commun (Camb) 2010; 46:5115-7. [PMID: 20532273 DOI: 10.1039/c0cc00256a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- María J Romero
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, E-15782, Spain
| | | | | | | | | | | |
Collapse
|
24
|
López MV, Bermejo MR, Vázquez ME, Taglietti A, Zaragoza G, Pedrido R, Martínez-Calvo M. Sulfonamide-imines as selective fluorescent chemosensors for the fluoride anion. Org Biomol Chem 2010; 8:357-62. [PMID: 20066270 DOI: 10.1039/b916040j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Miguel Vázquez López
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
| | | | | | | | | | | | | |
Collapse
|
25
|
Martínez-Calvo M, González-Noya AM, Pedrido R, Romero MJ, Fernández MI, Zaragoza G, Bermejo MR. A double-stranded dinuclear cadmium(ii) helicate that assembles into chains in the solid state. Dalton Trans 2010; 39:1191-4. [DOI: 10.1039/b915953c] [Citation(s) in RCA: 8] [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]
|
26
|
Pedrido R, Vázquez López M, Sorace L, González-Noya AM, Cwiklinska M, Suárez-Gómez V, Zaragoza G, Bermejo MR. The coordination preferences of metal centres modulate superexchange coupling interactions in a metallo-supramolecular helical assembly. Chem Commun (Camb) 2010; 46:4797-9. [DOI: 10.1039/c0cc00338g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Pedrido R, Romero MJ, González-Noya AM, Bermejo MR, Martínez-Calvo M, Zaragoza G. Unprecedent Isolation of a Mixture of Conformational and Linkage Isomers in a Thiosemicarbazone Cobalt Mesocate. Inorg Chem 2009; 48:10862-4. [DOI: 10.1021/ic901657z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - María J. Romero
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Ana M. González-Noya
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, Lugo, E-27002
| | - Manuel R. Bermejo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Miguel Martínez-Calvo
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, 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
| |
Collapse
|
28
|
Castiñeiras A, Pedrido R. Novel Fluorescent Cationic Silver Thiosemicarbazone Clusters Containing Different Eight-Membered Ag4S4 Metallacycles. Inorg Chem 2009; 48:4847-55. [PMID: 19385602 DOI: 10.1021/ic900062y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [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)
- Alfonso Castiñeiras
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Spain
| |
Collapse
|
29
|
Pedrido R, Romero MJ, Bermejo MR, Martínez-Calvo M, González-Noya AM, Zaragoza G. Coordinative trends of a tridentate thiosemicarbazone ligand: synthesis, characterization, luminescence studies and desulfurization processes. Dalton Trans 2009:8329-40. [DOI: 10.1039/b908782f] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
|
31
|
Pedrido R, González-Noya AM, Romero MJ, Martínez-Calvo M, Vázquez López M, Gómez-Fórneas E, Zaragoza G, Bermejo MR. Pentadentate thiosemicarbazones as versatile chelating systems. A comparative structural study of their metallic complexes. Dalton Trans 2008:6776-87. [PMID: 19153625 DOI: 10.1039/b810601k] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [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 have prepared some transition and post-transition metal complexes derived from the pentadentate thiosemicarbazone ligand bis(4-N-ethylthiosemicarbazone)-2,6-diacetylpyridine H(2)L(Et), by both chemical and electrochemical procedures. The complexes have been synthesised and fully characterised, including the crystal structures for the ligand H(2)L(Et) and its manganese, cadmium and lead complexes. We have also performed multinuclear (109)Ag, (113)Cd, (119)Sn and (207)Pb studies for silver, cadmium, tin and lead compounds, respectively. Moreover we present here a comparative study on the different structures found for pentadentate thiosemicarbazonate complexes, trying to check the influence of different factors, such as experimental procedure, size of metal, structure of the ligand, and metal oxidation state, on the final structure of the complex formed. Our aim is gaining a better insight into the coordination trends of pentadentate thiosemicarbazone ligands.
Collapse
Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia E-15782, Spain
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Hicks MR, Rullay AK, Pedrido R, Crout DH, Pinheiro TJT. Efficient Synthesis of Methanesulphonate-Derived Lipid Chains for Attachment of Proteins to Lipid Membranes. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910802213794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Matthew R. Hicks
- a Department of Biological Sciences , University of Warwick , Coventry, UK
- b Department of Chemistry , University of Warwick , Coventry, UK
| | - Atvinder K. Rullay
- a Department of Biological Sciences , University of Warwick , Coventry, UK
| | - Rosa Pedrido
- c Department of Inorganic Chemistry, Faculty of Chemistry , University of Santiago de Compostela, Santiago de Compostela , Galicia, Spain
| | - David H. Crout
- a Department of Biological Sciences , University of Warwick , Coventry, UK
| | | |
Collapse
|
33
|
Vázquez López M, Zaragoza G, Pedrido R, Rama G, Bermejo MR. Delving into the second supramolecular event approach: Aggregation of small metallo-supramolecular units supported by one or two types of non-covalent forces. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.04.039] [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: 10/22/2022]
|
34
|
Bermejo MR, González-Noya AM, Martínez-Calvo M, Pedrido R, Romero MJ, Vázquez López M. Checking the Route to Cluster Helicates. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800477] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
35
|
Castiñeiras A, Pedrido R. Factors Involved in the Nuclearity of Silver Thiosemicarbazone Clusters: Cocrystallization of Two Different Sized Tetranuclear Silver(I) Clusters Derived from a Phosphinothiosemicarbazone Ligand. Inorg Chem 2008; 47:5534-6. [DOI: 10.1021/ic800178v] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alfonso Castiñeiras
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| |
Collapse
|
36
|
Pedrido R, Romero MJ, Bermejo MR, González-Noya AM, García-Lema I, Zaragoza G. Metal-catalysed oxidation processes in thiosemicarbazones: new complexes with the ligand N-{2-([4-N-ethylthiosemicarbazone]methyl)phenyl}-p-toluenesulfonamide. Chemistry 2008; 14:500-12. [PMID: 17918755 DOI: 10.1002/chem.200700867] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The coordination behaviour of a new thiosemicarbazone Schiff-base building block, N-{2-([4-N-ethylthiosemicarbazone]methyl)phenyl}-p-toluenesulfonamide, H2L1 (1), incorporating a bulky tosyl group, towards Mn II, Fe II, Co II, Ni II, Cu II, Zn II, Cd II, Ag I, Sn II, and Pb II has been investigated by means of an electrochemical preparative procedure. Most metal complexes of L1 have the general formula [M(L1)]2.nX (M=Mn, Fe, Co, Ni, Cu, Cd, Pb; n=0-4, X=H2O or CH3CN), as confirmed by the structure of [Pb(L1)]2 (15), in which the lone pair on lead is stereochemically active. This lead(II) complex shows an intense fluorescence emission with a quantum yield of 0.13. In the case of silver, the complex formed was found to possess a stoichiometry of [Ag2(L1)]2.3H2O. During reactions with manganese and copper metals, interesting catalysed processes have been found to take place, with remarkable consequences regarding the ligand skeleton structure. In synthesising the manganese complex, we obtained an unexpected dithiolate thiosemicarbazone tosyl ligand, H2L2, as a side-product, which has been fully characterised, including by X-ray diffraction analysis. In the case of copper, the solid complex has the formula [CuL1]2, but the crystallised product shows the copper atoms coordinated to a new cyclised thiosemicarbazone ligand, H2L3, as in the structures of the complexes [Cu(L3)]2.CH3CN (8) and [Cu(L3)(H2O)]2.CH3CN.H2O (9). The zinc complex [Zn(L1)]4 (12) displays a particular tetranuclear zeolite-type structure capable of hosting small molecules or ions, presumably through hydrogen bonding.
Collapse
Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | | | | | | | | | | |
Collapse
|
37
|
|
38
|
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]
|
39
|
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]
|
40
|
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]
|
41
|
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
| |
Collapse
|
42
|
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.
Collapse
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.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
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].
Collapse
Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | | | | | | | | | | | | |
Collapse
|
44
|
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]
|
45
|
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]
|
46
|
Blanco E, González-Pérez A, Ruso JM, Pedrido R, Prieto G, Sarmiento F. A comparative study of the physicochemical properties of perfluorinated and hydrogenated amphiphiles. J Colloid Interface Sci 2005; 288:247-60. [PMID: 15927586 DOI: 10.1016/j.jcis.2005.02.085] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [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: 11/16/2004] [Revised: 01/31/2005] [Accepted: 02/25/2005] [Indexed: 11/28/2022]
Abstract
In this work we studied and compared the physicochemical properties of perfluorinated (sodium perfluoroheptanoate, C7FONa, and perfluorooctanoate, C8FONa) and hydrogenated (sodium octanoate, C8HONa, decanoate, C10HONa, and dodecanoate, C12HONa) amphiphiles. First, we determined their Krafft points to study the solubility and appropriate temperature range of micellization of these compounds. The critical micelle concentration (cmc) and ionization degree of micellization (beta) as a function of temperature (T) were estimated from conductivity data. Plots of cmc vs T appear to follow the typical U-shaped curve with a minimum T(min). The results show that the surfactants with CF2/CH2 ratio of 1.5 between alkyl chains (C12HONa-C8FONa and C10HONa-C7FONa) have nearly the same minimum value for cmc against temperature. The comparison between the cmc of hydrogenated amphiphiles and the corresponding perfluorinated amphiphiles must be done at this point. Thermodynamic functions of micellization were obtained by applying different theoretical models and choosing the one that best fit our experimental data. Although perfluorinated and hydrogenated amphiphiles present similar thermodynamic behavior, we have found a variation of 1.3 to 1.7 in the CF2/CH2 ratio, which did not remain constant with temperature. In the second part of this study the apparent molar volumes and adiabatic compressibilities were determined from density and ultrasound velocity measurements. Apparent molar volumes at infinite dilution presented the ratio 1.5 between alkyl chains again. However, apparent molar volumes upon micellization for sodium perfluoroheptanoate indicated a different aggregation pattern.
Collapse
Affiliation(s)
- Elena Blanco
- Group of Biophysics and Interfaces, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | | | | | | | | | | |
Collapse
|
47
|
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]
|
48
|
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]
|
49
|
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.
Collapse
Affiliation(s)
- Rosa Pedrido
- Departamento de Química Inorgánica, Facultade de Química, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | | | | | | | | | | | | | | |
Collapse
|
50
|
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
| |
Collapse
|