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Issue 26, 2020
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Synthesis, characterization and photoinduced CO-release by manganese(i) complexes

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Abstract

Herein, we report the CO-releasing activity of three new photoCORMs, two with nonbonding pyridine moieties and one with a benzyl group. Compounds [MnBr(CO)3(bpa-κ2)] (2, where bpa = N-benzyl(2-pyridylmethyl)amine); [MnBr(CO)3(pmpea-κ2)] (3, where pmpea = N-(2-pyridylmethyl)-N′-(2-pyridylethyl)amine) and [MnBr(CO)3(bpea-κ2)] (4, where bpea = N-bis(2-pyridylethyl)amine) were synthesized and characterized by common spectroscopic techniques (UV-Vis and IR). Density functional theory studies were also performed to provide new insights into the M–C bond and to assume the orbitals involved in the absorption transitions. Their CO-releasing activities were measured both in organic and in physiological media and compared to that of a previously published compound [Mn(CO)3(dpa-κ3)]Br (1, where dpa = N-bis(2-pyridylmethyl)amine). An increase in the number of members of the chelate from five to six influenced the release of CO, affecting both the binding mode of the ligand and the CO-release process and affecting their potential use as CO-release carriers and therapeutic agents.

Graphical abstract: Synthesis, characterization and photoinduced CO-release by manganese(i) complexes

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Supplementary files

Article information


Submitted
05 May 2020
Accepted
29 May 2020
First published
01 Jun 2020

New J. Chem., 2020,44, 10892-10901
Article type
Paper

Synthesis, characterization and photoinduced CO-release by manganese(I) complexes

A. L. Amorim, A. Guerreiro, V. A. Glitz, D. F. Coimbra, A. J. Bortoluzzi, G. F. Caramori, A. L. Braga, A. Neves, G. J. L. Bernardes and R. A. Peralta, New J. Chem., 2020, 44, 10892
DOI: 10.1039/D0NJ02260H

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