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Acosta A, Antipán J, Fernández M, Prado G, Sandoval-Altamirano C, Günther G, Gutiérrez-Urrutia I, Poblete-Castro I, Vega A, Pizarro N. Photochemistry of P,N-bidentate rhenium(i) tricarbonyl complexes: reactive species generation and potential application for antibacterial photodynamic therapy. RSC Adv 2021; 11:31959-31966. [PMID: 35495525 PMCID: PMC9041655 DOI: 10.1039/d1ra06416a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 09/14/2021] [Indexed: 12/22/2022] Open
Abstract
In this work, we describe the photoisomerization of facial rhenium(i) tricarbonyl complexes bearing P,N-bidentate pyridyl/phosphine ligands with different chelating rings and anions: RePNBr, RePNTfO, and RePNNBr, which are triggered under irradiation at 365 nm in solutions. The apparent photodegradation rate constants (k app) depend on the coordinating ability of the solvent, being lowest in acetonitrile. The k app value increases as the temperature rises, suggesting a reactive IL excited state thermally populated from the MLCT excited state involved. Using the Eyring equation, positive activation enthalpies (ΔH ≠) accompanied by high negative values for the activation entropy (ΔS ≠) were obtained. These results suggest whatever the P,N-ligand or anion, the reaction proceeds through a strongly solvated or a compact transition state, which is compatible with an associative mechanism for the photoisomerization. A 100-fold decrease in the log10 CFU value is observed for E. coli and S. aureus in irradiated solutions of the compounds, which follows the same tendency as their singlet oxygen generation quantum yield: RePNBr > RePNTfO > RePNNBr, while no antibacterial activity is observed in the darkness. This result indicates that the generation of singlet oxygen plays a key role in the antibacterial capacity of these complexes.
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Affiliation(s)
- Alison Acosta
- Universidad Técnica Federico Santa María, Centro de Biotecnología Avenida España 1680 Valparaíso Chile
| | - Javier Antipán
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas Viña del Mar Chile
| | - Mariano Fernández
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas Viña del Mar Chile
| | - Gaspar Prado
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas Viña del Mar Chile
| | - Catalina Sandoval-Altamirano
- Universidad de Santiago de Chile (USACH), Facultad de Química y Biología, Departamento de Ciencias del Ambiente Chile
| | - Germán Günther
- Universidad de Chile, Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Orgánica y Fisicoquímica Santiago Chile
| | - Izabook Gutiérrez-Urrutia
- Universidad Andrés Bello, Facultad de Ciencias de la Vida, Center for Bioinformatics and Integrative Biology (CBIB), Biosystems Engineering Laboratory Santiago Chile
| | - Ignacio Poblete-Castro
- Universidad Andrés Bello, Facultad de Ciencias de la Vida, Center for Bioinformatics and Integrative Biology (CBIB), Biosystems Engineering Laboratory Santiago Chile
| | - Andrés Vega
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas Viña del Mar Chile
| | - Nancy Pizarro
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas Viña del Mar Chile
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2
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Saldías M, Manzur J, Palacios RE, Gómez ML, Fuente JDL, Günther G, Pizarro N, Vega A. The binuclear dual emitter [Br(CO) 3Re(PN)(NP)Re(CO) 3Br] (PN): 3-chloro-6-(4-diphenylphosphinyl)butoxypyridazine, a new bridging P,N-bidentate ligand resulting from the ring opening of tetrahydrofuran. Dalton Trans 2018; 46:1567-1576. [PMID: 28091640 DOI: 10.1039/c6dt04158b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lithium diphenylphosphide unexpectedly provokes the ring-opening of tetrahydrofuran (THF) and by reaction with 3,6-dichloropyridazine leads to the formation of the ligand 3-chloro-6-(4-diphenylphosphinyl)butoxypyridazine (P⋯N), which was isolated. The reaction of this ligand with the (Re(CO)3(THF)Br)2 dimer yields the novel complex [Br(CO)3Re(μ-3-chloro-6-(4-diphenylphosphinyl)butoxypyridazine)2Re(CO)3Br] (BrRe(P⋯N)(N⋯P)ReBr), which was crystallized in the form of a chloroform solvate, (C46H40Br2Cl2N4O8P2Re2)·(CHCl3). The monoclinic crystal (P21/n) displays a bimetallic cage structure with a symmetry inversion centre in the middle of the rhenium to rhenium line. The molecule shows two oxidation signals occurring at +1.50 V and +1.76 V which were assigned to the ReI/ReII and ReII/ReIII metal-centered couples, respectively, while signals observed at -1.38 V and -1.68 V were assigned to ligand centered reductions. Experimental and DFT/TDDFT results indicate that the UV-Vis absorption maximum of BrRe(P⋯N)(N⋯P)ReBr occurring near 380 nm displays a metal to ligand charge transfer (MLCT) character, which is consistent with CV results. Upon excitation at this wavelength, a weak emission (Φem < 1 × 10-3) is observed around 580 nm (in dichloromethane) which decays with two distinct lifetimes τ1 and τ2 of 24 and 4.7 ns, respectively. The prevalence of non-radiative deactivation pathways is consistent with efficient internal conversion induced by the high conformational flexibility of the P⋯N ligand's long carbon chain. Measurements in a frozen solvent at 77 K, where vibrational deactivation is hindered, show intense emission associated with the 3MLCT state. These results demonstrate that BrRe(P⋯N)(N⋯P)ReBr preserves the dual emitting nature previously reported for the mononuclear complex RePNBr, with emission associated with and states.
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Affiliation(s)
- Marianela Saldías
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Quillota 980, Viña del Mar, Chile.
| | - Jorge Manzur
- Universidad De Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Ciencias de los Materiales, Av. Tupper 2460, Santiago, Chile
| | - Rodrigo E Palacios
- Universidad Nacional de Rio Cuarto y CONICET, Facultad de Ciencias Exactas Fisicoquímicas y Naturales, Departamento de Química, Campus Universitario, 5800 Río Cuarto, Córdoba, Argentina
| | - María L Gómez
- Universidad Nacional de Rio Cuarto y CONICET, Facultad de Ciencias Exactas Fisicoquímicas y Naturales, Departamento de Química, Campus Universitario, 5800 Río Cuarto, Córdoba, Argentina
| | - Julio De La Fuente
- Universidad De Chile, Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Orgánica y Fisicoquímica, Sergio Livingstone 1007, Santiago, Chile
| | - Germán Günther
- Universidad De Chile, Facultad de Ciencias Químicas y Farmacéuticas, Departamento de Química Orgánica y Fisicoquímica, Sergio Livingstone 1007, Santiago, Chile
| | - Nancy Pizarro
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Quillota 980, Viña del Mar, Chile.
| | - Andrés Vega
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Quillota 980, Viña del Mar, Chile. and Centro para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA, Chile
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3
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Kinetics and photophysical behavior of the P,N -Re I complex [ P,N -{(C 6 H 5 ) 2 (C 5 H 4 N)P}Re(CO) 3 ( O -O 3 SCF 3 )]: A directly coordinated (and labile) triflate. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Salvarese N, Refosco F, Seraglia R, Roverso M, Dolmella A, Bolzati C. Synthesis and characterization of rhenium(iii) complexes with (Ph 2PCH 2CH 2) 2NR diphosphinoamine ligands. Dalton Trans 2017; 46:9180-9191. [PMID: 28675225 DOI: 10.1039/c7dt01032j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a new series of neutral, six-coordinated compounds [ReIIIX3(PNPR)], where X is Cl or Br and PNPR is a diphosphinoamine having the general formula (Ph2PCH2CH2)2NR (R = H, CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3 and CH2CH2OCH3) are reported. Stable [ReIIIX3(PNPR)] complexes were synthesized, in variable yields, starting from precursors where the metal was in different oxidation states (iii and v), by ligand-exchange and/or redox-substitution reactions. The compounds were characterized by elemental analysis, proton NMR spectroscopy, cyclic voltammetry, UV/vis spectroscopy, positive-ion electrospray ionization mass spectrometry (ESI(+)-MS) and X-ray diffraction analysis. Although the formulation of the complexes allows either meridional or facial isomers, the latter arrangement was prevalent both in the solid and solution states. Only [ReCl3(PNPH)] showed a meridional configuration both in solution and in the crystalline state. [ReBr3(PNPme)] prefers the meridional configuration in the crystalline state and the facial one in solution. While ESI(+)-MS and voltammetric data seem to indicate some dependency from the nature of the alkyl substituent at the nitrogen, the available structural data of the complexes show only slight differences both for angles and bond lengths upon change of the alkyl chain tethered to the nitrogen.
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Mella P, Palma JC, Cepeda-Plaza M, Aguirre P, Manzur J, Günther G, Pizarro N, Vega A. Tuning the photophysical properties of a (P,N)ReI complex by adding a –NH– fragment into a P,N-bidentate ligand: The case of [P,N-{(C6H5)2(C5H4N)NHPRe(CO)3Br]. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.03.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Pizarro N, Duque M, Chamorro E, Nonell S, Manzur J, de la Fuente JR, Günther G, Cepeda-Plaza M, Vega A. Dual Emission of a Novel (P,N) ReI Complex: A Computational and Experimental Study on [P,N-{(C6H5)2(C5H4N)P}Re(CO)3Br]. J Phys Chem A 2015; 119:3929-35. [DOI: 10.1021/jp512614w] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nancy Pizarro
- Departamento
de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Quillota 980, Viña del Mar, Valparaíso, Chile
| | - Mario Duque
- Departamento
de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Quillota 980, Viña del Mar, Valparaíso, Chile
| | - Eduardo Chamorro
- Departamento
de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Quillota 980, Viña del Mar, Valparaíso, Chile
| | - Santi Nonell
- Institut
Quimic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain
| | - Jorge Manzur
- Departamento
de Ciencia de Los Materiales,
Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Av. Tupper 2069, Santiago, Chile
- Centro
para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA, Universidad de Santiago de Chile, Avda. Ecuador 3493, Estación Central, Santiago, Chile
| | - Julio R. de la Fuente
- Facultad
de Ciencias Químicas y Farmacéuticas, Departamento de
Química Orgánica y Fisicoquímica, Universidad de Chile, Santos Dumont 964, Independencia, Chile
| | - Germán Günther
- Facultad
de Ciencias Químicas y Farmacéuticas, Departamento de
Química Orgánica y Fisicoquímica, Universidad de Chile, Santos Dumont 964, Independencia, Chile
| | - Marjorie Cepeda-Plaza
- Departamento
de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Quillota 980, Viña del Mar, Valparaíso, Chile
| | - Andrés Vega
- Departamento
de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Quillota 980, Viña del Mar, Valparaíso, Chile
- Centro
para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA, Universidad de Santiago de Chile, Avda. Ecuador 3493, Estación Central, Santiago, Chile
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Saucedo Anaya SA, Hagenbach A, Abram U. Tricarbonylrhenium(I) and -technetium(I) complexes with bis(2-pyridyl)phenylphosphine and tris(2-pyridyl)phosphine. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Li X, Liu X, Wu Z, Zhang H. DFT/TDDFT Studies on the Electronic Structures and Spectral Properties of Rhenium(I) Pyridinybenzoimidazole Complexes. J Phys Chem A 2008; 112:11190-7. [DOI: 10.1021/jp805758n] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaona Li
- State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Xiaojuan Liu
- State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Zhijian Wu
- State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Hongjie Zhang
- State Key Laboratory of Rare Earth Resource Utilizations, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China, and Graduate School of the Chinese Academy of Sciences, Beijing, People's Republic of China
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