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

NO Photorelease from a Ruthenium Complex Assisted by Formation of a Supramolecular Dimer

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Author(s):
Douglas B. G. Mateus [1] ; Ana Paula L. Batista [2] ; Renata L. Rodrigues [3] ; Sofia Nikolaou [4]
Total Authors: 4
Affiliation:
[1] Universidade de São Paulo. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Departamento de Química - Brasil
[2] Universidade de São Paulo. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Departamento de Química - Brasil
[3] Universidade de São Paulo. Departamento de Física e Química. Faculdade de Ciências Farmacêuticas de Ribeirão Preto - Brasil
[4] Universidade de São Paulo. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Departamento de Química - Brasil
Total Affiliations: 4
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 31, n. 11, p. 2319-2330, 2020-10-30.
Abstract

This work presents the NO release from compound [Ru(biq)2(H2O)(NO)](PF6)3 (biq = 2,2’-biquinoline) with visible light irradiation (λirrad = 660 nm), assisted by the low-absorbing photosensitizer [Ru(biq)2Cl2]. The structure of both compounds were characterized by means of ESI-MS (electrospray ionization mass spectrometry). The NO+ stretching, ν(NO) = 1995 cm-1, is atypically shifted to higher energy. This observation, along with the E1/2 = 0.49 V (vs. Ag/AgCl) assigned to the Ru2+/3+ redox pair observed for compound [Ru(biq)2Cl2] and its photoreactivity in solution suggest that the RuII ion, when coordinated to two biquinolines, behaves as a hard Pearson acid. Molecular modelling results confirmed the typical geometry distortion of ruthenium-polypyridine complexes bearing sterically hindered ligands. They also suggest the formation of a supramolecular dimer, assembled by weak interaction between biquinoline ligands from each compound, that is claimed to be responsible for the high efficiency of the NO photorelease bimolecular sensitization. (AU)

FAPESP's process: 18/18060-3 - Use of inorganic supramolecular structures for the development of functional molecules and controlled release of bioactive species
Grantee:Sofia Nikolaou
Support Opportunities: Regular Research Grants