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Santana VT, Cunha BN, Plutín AM, Silveira RG, Castellano EE, Batista AA, Calvo R, Nascimento OR. Magnetic-field-tuned phase transition of a molecular material from the isolated-spin to the coupled-spin regime. Phys Chem Chem Phys 2019; 21:4394-4407. [DOI: 10.1039/c8cp06719h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A quantum phase transition, as a consequence of spin-entanglements caused by Cu–Cu exchange couplings, explains EPR measurements in a new monomeric CuII compound.
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Affiliation(s)
- Vinicius T. Santana
- CEITEC – Central European Institute of Technology
- Brno University of Technology
- 61200 Brno
- Czech Republic
- Departamento de Física e Ciencias Interdisciplinares
| | - Beatriz N. Cunha
- Departamento de Química
- Universidade Federal de São Carlos – UFSCar
- São Carlos
- Brazil
- Instituto Federal Goiano
| | - Ana M. Plutín
- Laboratorio de Síntesis Orgánica
- Facultad de Química
- Universidad de la Habana UH
- Cuba
| | - Rafael G. Silveira
- Departamento de Química
- Universidade Federal de São Carlos – UFSCar
- São Carlos
- Brazil
- Instituto Federal Goiano
| | - Eduardo E. Castellano
- Departamento de Física e Ciencias Interdisciplinares
- Instituto de Física de São Carlos
- Universidade de São Paulo – USP
- CP 369
- São Carlos
| | - Alzir A. Batista
- Departamento de Química
- Universidade Federal de São Carlos – UFSCar
- São Carlos
- Brazil
| | - Rafael Calvo
- Instituto de Física del Litoral
- CONICET-UNL, and Departamento de Física
- Facultad de Bioquímica y Ciencias Biológicas
- Universidad Nacional del Litoral
- 3000 Santa Fe
| | - Otaciro R. Nascimento
- Departamento de Física e Ciencias Interdisciplinares
- Instituto de Física de São Carlos
- Universidade de São Paulo – USP
- CP 369
- São Carlos
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2
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Viqueira J, Durán ML, García-Vázquez JA, Castro J, Platas-Iglesias C, Esteban-Gómez D, Alzuet-Piña G, Moldes A, Nascimento OR. Modulating the DNA cleavage ability of copper(ii) Schiff bases through ternary complex formation. NEW J CHEM 2018. [DOI: 10.1039/c8nj03292k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper(ii) Schiff-bases were electrochemically synthesized and characterized. The presence of co-ligands such as 2,2′-bpy or phen in the metal coordination environment increases the DNA cleavage efficiency.
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Affiliation(s)
- Joaquín Viqueira
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - María L. Durán
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - José A. García-Vázquez
- Departamento de Química Inorgánica
- Campus Vida
- Universidad de Santiago de Compostela
- 15782 Santiago de Compostela
- Spain
| | - Jesús Castro
- Departamento de Química Inorgánica
- Facultade de Química
- Edificio de Ciencias Experimentais
- Universidade de Vigo
- 36310 Vigo
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira
- 15008 A Coruña
- Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira
- 15008 A Coruña
- Spain
| | - Gloria Alzuet-Piña
- Departament de Química Inorgànica
- Facultat de Farmàcia
- Universitat de València
- 46100 Burjassot
- Spain
| | - Angeles Moldes
- Departament de Química Inorgànica
- Facultat de Farmàcia
- Universitat de València
- 46100 Burjassot
- Spain
| | - Otaciro R. Nascimento
- Instituto de Física de Sao Carlos
- Universidade de Sao Paulo
- 13560-250 Sao Carlos
- Brazil
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3
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Hori M, Sakakura A, Ishihara K. Enantioselective 1,3-dipolar cycloaddition of azomethine imines with propioloylpyrazoles induced by chiral π-cation catalysts. J Am Chem Soc 2014; 136:13198-201. [PMID: 25197958 DOI: 10.1021/ja508441t] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We developed 1,3-dipolar cycloadditions of azomethine imines with propioloylpyrazoles catalyzed by a chiral copper(II) complex of 3-(2-naphthyl)-l-alanine amide. The asymmetric environment created by intramolecular π-cation interaction and the N-alkyl group of the chiral ligand gives the corresponding adducts in high yields with excellent enantioselectivity. This is the first successful method for the catalytic enantioselective 1,3-dipolar cycloaddition of azomethine imines with internal alkyne derivatives to give fully substituted pyrazolines.
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Affiliation(s)
- Masahiro Hori
- Graduate School of Engineering, Nagoya University , Furo-cho, Chikusa, Nagoya 464-8603, Japan
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4
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Single crystal electron paramagnetic resonance spectra of CuII ions in Cu(tyrosine)2. J Inorg Biochem 2012; 114:75-81. [DOI: 10.1016/j.jinorgbio.2012.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 04/10/2012] [Accepted: 04/11/2012] [Indexed: 11/17/2022]
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5
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Sousa‐Pedrares A, Viqueira JA, Antelo J, Labisbal E, Romero J, Sousa A, Nascimento OR, García‐Vázquez JA. Synthesis and Characterization of Homoleptic and Heteroleptic Cobalt, Nickel, Copper, Zinc and Cadmium Compounds with the 2‐(Tosylamino)‐
N
‐[2‐(tosylamino)benzylidene]aniline Ligand. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001356] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Antonio Sousa‐Pedrares
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Joaquin A. Viqueira
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Jorge Antelo
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Elena Labisbal
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Jaime Romero
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Antonio Sousa
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
| | - Otaciro R. Nascimento
- Instituto de Física de Sao Carlos, Universidade de Sao Paulo, CP 369, 13560‐250 Sao Carlos, SP, Brazil
| | - José A. García‐Vázquez
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain, Fax: +34‐(9)81‐547102
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Sakakura A, Ishihara K. Asymmetric Cu(ii) catalyses for cycloaddition reactions based on π–cation or n–cation interactions. Chem Soc Rev 2011; 40:163-72. [DOI: 10.1039/b924478f] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Synthesis, structural characterization and ex vivo biological properties of a new complex [Cu(propranolol)2]·2H2O, a potential beta-blocker. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.07.064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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8
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Facchin G, Kremer E, Barrio DA, Etcheverry SB, Costa-Filho AJ, Torre MH. Interaction of Cu-dipeptide complexes with Calf Thymus DNA and antiproliferative activity of [Cu(ala-phe)] in osteosarcoma-derived cells. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.04.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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da S. Maia PI, Pavan FR, Leite CQ, Lemos SS, de Sousa GF, Batista AA, Nascimento OR, Ellena J, Castellano EE, Niquet E, Deflon VM. Vanadium complexes with thiosemicarbazones: Synthesis, characterization, crystal structures and anti-Mycobacterium tuberculosis activity. Polyhedron 2009. [DOI: 10.1016/j.poly.2008.11.017] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Shimazaki Y, Takani M, Yamauchi O. Metal complexes of amino acids and amino acid side chain groups. Structures and properties. Dalton Trans 2009:7854-69. [PMID: 19771344 DOI: 10.1039/b905871k] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Synthesis, characterization and magnetic properties of six new copper(II) complexes with aminoacids as bridging ligand, exhibiting ferromagnetic coupling. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.03.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Ishihara K, Fushimi M, Akakura M. Rational design of minimal artificial Diels-Alderases based on the copper(II) cation-aromatic pi attractive interaction. Acc Chem Res 2007; 40:1049-55. [PMID: 17661439 DOI: 10.1021/ar700083a] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have designed a minimal artificial metalloenzyme that is prepared in situ from Cu(OTf) 2 or Cu(NTf 2) 2 (1.0 equiv) and L-DOPA-derived monopeptide (1.1 equiv) based on the cation-pi attractive interaction between copper(II) and the aromatic arm of the ligand, which is postulated on the basis of X-ray diffraction analysis and theoretical calculations. This catalyst (2-10 mol %) is highly effective for not only the enantioselective Diels-Alder reaction with alpha,beta-unsaturated 1-acyl-3,5-dimethylpyrazoles but also the enantioselective Mukaiyama-Michael reaction with these compounds. Products bearing a 3,5-dimethylpyrazolyl auxiliary may be transformed into a range of carboxylic acid derivatives, such as the corresponding carboxylic acids, esters, amides, alcohols, aldehydes, ketones, and beta-ketoesters, by known methods. The present results demonstrate that monopeptides are chirally economical and readily tunable ligands compared to bis(oxazoline)s, which have been reported to be notably useful ligands in various enantioselective reactions with bidentate electrophiles.
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Affiliation(s)
- Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan.
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Sanchiz J, Kremer C, Torre M, Facchin G, Kremer E, Castellano E, Ellena J. Magnetic properties of copper(II) complexes containing peptides. Crystal structure of [Cu(phe-leu)]. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2006.03.058] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Santana RC, Cunha RO, Carvalho JF, Vencato I, Calvo R. Single crystal EPR study of electronic structure and exchange interactions for copper(II)(L-arginine)2(SO4).(H2O)6: a model system to study exchange interactions between unpaired spins in proteins. J Inorg Biochem 2005; 99:415-23. [PMID: 15621273 DOI: 10.1016/j.jinorgbio.2004.10.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2004] [Revised: 10/04/2004] [Accepted: 10/13/2004] [Indexed: 11/15/2022]
Abstract
We report EPR measurements at 9.77 and 34.1 GHz in powder and single crystal samples of the ternary copper amino acid complex Cu(L-arginine)(2)(SO(4)).(H(2)O)(6). The single crystal Electron Paramagnetic Resonance spectra display a single resonance for all magnetic field orientations in the ca and cb crystal planes. In the ab plane they display two resonances for most orientations of the magnetic field, and only one resonance for orientations close to the crystal axes. This behavior is a result of the selective collapse of the resonances corresponding to the four copper sites in the unit cell produced by the exchange interactions between copper ions. From the characteristics of the collapse and the angular dependences of the position and width of the resonances we evaluate the g-tensors of the copper molecules and estimate exchange interactions |J(1)/k(B)|=0.9 K and |J(2)/k(B)|=0.009 K between copper neighbors at 5.908 A and at 15.684 A, respectively. J(1) is assigned to a syn-anti equatorial-apical carboxylate bridge with a total bond length of 7.133 A. J(2) is assigned to a long bridge of 12 atoms with a total bond length of 19.789 A, that includes two hydrogen bonds. The results are discussed in terms of the crystal and electronic structure of Cu(L-arginine)(2)(SO(4)).(H(2)O)(6). We show that J(2) is in excellent agreement with the observed magnetic interaction between the reduced quinone acceptors in the photosynthetic reaction center protein of the bacterium Rb. sphaeroides, which is transmitted along a similar chemical path containing two hydrogen bonds. Our findings indicate that it is valid to estimate values for the exchange interactions between redox centers in proteins transmitted along long chemical paths containing sigma and H-bonds, from data obtained in model systems, and emphasize the importance of measuring exchange interactions in biologically relevant model systems.
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Affiliation(s)
- R C Santana
- Universidade Federal de Goiás, Instituto de Física, CP 131, Goiânia, Goiás 74001-970, Brazil.
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