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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Studying the catecholamine effect on the electronic delocalization of the paramagnetic [Ru(NH3)(4)(catecholamine)](+) complex through H-1-NMR, theoretical calculations, and resonance Raman

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Author(s):
Alves, Jacqueline Q. [1] ; Formiga, Andre L. B. [2] ; Goncalves, Rogeria R. [1] ; da Silva, Roberto S. [3, 1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil
[2] Univ Estadual Campinas, Campinas, SP - Brazil
[3] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Ribeirao Preto, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Coordination Chemistry; v. 73, n. 2 FEB 2020.
Web of Science Citations: 0
Abstract

Ruthenium complexes containing catecholamines and catechol as ligands with general formula {[}Ru(NH3)(4)(catecholamine)]Cl, where ``catecholamine{''} is isoproterenol (in complex 1), dopamine (in complex 2), noradrenaline (in complex 3), catechol (in complex 4), or adrenaline (in complex 5), were synthesized. The complexes were characterized by vibrational and NMR spectroscopies, mass spectrometry, cyclic voltammetry, and spectroeletrochemistry. The electronic and electrochemical features were analyzed in terms of the electronic density, which is affected by ruthenium complexation and different substituent groups on the aromatic ring. Resonance Raman spectra displayed bands assigned to the Ru(II)-semiquinone stretching frequencies, which agreed with the charge transfer band. Theoretical calculations helped to evaluate the metal-non-innocent ligand orbital mixing. All the results suggested that Ru(II)-semiquinone complexes are formed, and that the unpaired electron is delocalized between the metal ion and the non-innocent ligand. (AU)

FAPESP's process: 16/12707-0 - Cytotoxicity and photo-cytotoxicity of new ruthenium-phthalocyanines compounds as nitric oxide and oxygen singlet producers in cancer cell lines. an innovative purpose for metal based drug
Grantee:Roberto Santana da Silva
Support Opportunities: Regular Research Grants