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Giacomazzo GE, Doria S, Revilla-Cuesta A, De Monte N, Pagliai M, Pietraperzia G, Valtancoli B, Torroba T, Conti L, Di Donato M, Giorgi C. Photosensitizers Based on Bichromophoric Dyads Combining Ru(II)-Polypyridyl Complexes and Dissymmetric Perylene Monoimide Derivatives: The Nontrivial Role of Ligand Substitution. Inorg Chem 2024; 63:6248-6259. [PMID: 38533555 DOI: 10.1021/acs.inorgchem.3c04569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
The covalent modification of Ru(II) polypyridyl complexes (RPCs) with organic chromophores is a powerful strategy to obtain metal-based photosensitizer agents (PSs) with improved performance for application in photodynamic therapy (PDT). In this respect, perylene-imides are of particular interest due to their rich chemical-physical repertoire, and it is therefore quite surprising that their combination with RPCs has been poorly considered so far. Herein, we report on the photophysical behavior of two newly synthesized RPCs bearing a perylene monoimide appendant (PMI-Ad). Differently from the majority of RPCs-perylene-imides dyads, these chromophores are dissymmetric and are tethered to the metal centers through a single C-C bond in the 3- or 5-position of 1,10-phenanthroline (Ru-3PMI-Ad and Ru-5PMI-Ad). Both compounds show excellent singlet oxygen photosensitizing activity, with quantum yields reaching >90% in the case of Ru-3PMI-Ad. A combined spectroscopic and theoretical analysis, also involving transient absorption and luminescence lifetime measurements, demonstrates that both compounds undergo intersystem crossing on a very fast time scale (tens of picoseconds) and with high efficiency. Our results further demonstrate that the increased electron delocalization between the metal center and the PMI-Ad chromophore observed for Ru-3PMI-Ad additionally contributes to increase the singlet oxygen quantum yields by prolonging the lifetime of the triplet state.
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Affiliation(s)
- Gina Elena Giacomazzo
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
| | - Sandra Doria
- European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, Sesto Fiorentino (FI) 50019, Italy
- CNR-ICCOM, via Madonna del Piano 10, Sesto Fiorentino (FI) 50019, Italy
| | - Andrea Revilla-Cuesta
- Department of Chemistry, University of Burgos, Pza. Misael Bañuelos s/n, Burgos 09001, Spain
| | - Nicola De Monte
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
| | - Marco Pagliai
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
| | - Giangaetano Pietraperzia
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
- European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, Sesto Fiorentino (FI) 50019, Italy
| | - Barbara Valtancoli
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
| | - Tomás Torroba
- Department of Chemistry, University of Burgos, Pza. Misael Bañuelos s/n, Burgos 09001, Spain
| | - Luca Conti
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
| | - Mariangela Di Donato
- European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, Sesto Fiorentino (FI) 50019, Italy
- CNR-ICCOM, via Madonna del Piano 10, Sesto Fiorentino (FI) 50019, Italy
| | - Claudia Giorgi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, Sesto Fiorentino (FI) 50019, Italy
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Alazaly AM, Clarkson GJ, Ward MD, Abdel-Shafi AA. Mechanism of Oxygen Quenching of the Excited States of Heteroleptic Chromium(III) Phenanthroline Derivatives. Inorg Chem 2023; 62:16101-16113. [PMID: 37721399 PMCID: PMC10548418 DOI: 10.1021/acs.inorgchem.3c02343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Indexed: 09/19/2023]
Abstract
In this study, we report the synthesis and characterization of some heteroleptic Cr(III) complexes of the form [Cr(Phen)2L](OTf)3, where Phen = 1,10-phenanthroline and L is either 2,2'-bipyridine (bpy) or its derivatives, such as 4,4'-dimethyl-2,2'-bipyridine (4,4'-DMB), 4,4'-dimethoxy-2,2'-bipyridine (4,4'-DMOB), 4,4'-ditert-butyl-2,2'-bipyridine (4,4'-dtbpy), 5,5'-dimethyl-2,2'-bipyridine (5,5'-DMB), 4,4'-dimethoxycarbonyl-2,2'-bipyridine (4,4'-dmcbpy) or 1,10-phenanthroline derivatives, such as 5-methyl-1,10-phenanthroline (5-Me-Phen) and 4,7-dimethyl-1,10-phenanthroline (4,7-DMP). Heteroleptic complexes were prepared in two stages via the intermediate [Cr(Phen)2(CF3SO3)2](CF3SO3) and five examples have been crystallographically characterized. Steady-state absorption and luminescence emission characteristics of these complexes were measured in 1 M HCl solutions. The luminescence quantum yield of these complexes was found to be the lowest for [Cr(Phen)2(4,4'-dmcbpy)](OTf)3 and the highest for [Cr(Phen)2(4,4'-DMB)](OTf)3 with values of 0.31 × 10-2 and 1.48 × 10-2, respectively. The calculated excited state energy, E0-0, was found to vary within the narrow range of 163.1-165.0 kJ mol-1 across the series. Transient absorption spectra in degassed, air-equilibrated, and oxygen-saturated 1 M HCl aqueous solutions were also measured at different time decays and demonstrated no significant differences, indicating the absence of any ion-separated species in the excited state. Excited-state decay traces at the wavelength of maximum absorption were used to calculate oxygen quenching rate constants, kq, which were found to be in the range 3.26-5.27 × 107 M-1 s-1. Singlet oxygen luminescence photosensitized by these complexes was observed in D2O, and its luminescence intensity at 1270 nm was used for the determination of singlet oxygen quantum yields for these complexes, which were in the range of 0.20-0.44, while the fraction of the excited 2E state quenched by oxygen was in the range of 0.22-0.68, and the efficiency of singlet oxygen production was in the range of 0.44-0.90. The mechanism by which the excited 2E state is quenched by oxygen is explained by a spin statistical model that predicts the balance between charge transfer and noncharge transfer deactivation pathways, which was represented by the parameter pCT that was found to vary from 0.35 to 0.68 for this series of Cr(III) complexes.
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Affiliation(s)
- Ahmed
M. M. Alazaly
- Department
of Chemistry, Faculty of Science, Ain Shams
University, Abbassia, Cairo 11566, Egypt
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Guy J. Clarkson
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Michael D. Ward
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
| | - Ayman A. Abdel-Shafi
- Department
of Chemistry, Faculty of Science, Ain Shams
University, Abbassia, Cairo 11566, Egypt
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3
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Akl HN, Salah D, Abdel-Samad HS, Abdel Aziz AA, Abdel-Shafi AA. Fractional dependence of the free energy of activation on the driving force of charge transfer in the quenching of the excited states of substituted phenanthroline homoleptic ruthenium(ii) complexes in aqueous medium. RSC Adv 2023; 13:13314-13323. [PMID: 37143702 PMCID: PMC10152132 DOI: 10.1039/d3ra01280h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/22/2023] [Indexed: 05/06/2023] Open
Abstract
The photophysical characteristics of some homoleptic ruthenium(ii) phenanthroline derivatives are investigated in aqueous medium. The lifetimes of the excited 3MLCT state of the studied complexes were found to be very sensitive to the type of the substituents on the phenanthroline ligand and were found to increase from about 0.96 μs in case of the parent [Ru(Phen)3]2+ complex to 2.97 μs in case of [Ru(DPPhen)3]2+. The transient absorption spectra of the current set of complexes were studied also in aqueous medium. Quenching of the excited 3MLCT states of the studied complexes by molecular oxygen were studied and quenching rate constants were found to be in the range 1.02-4.83 × 109 M-1 s-1. Values of singlet oxygen quantum yields were found to be in the range 0.01 to 0.25, and the corresponding efficiencies of singlet oxygen thereby produced, f T Δ, were in the range 0.03-0.52. The mechanism by which the excited 3MLCT state is quenched by oxygen is discussed in light of the spin statistical factor rate constants and the competition between charge transfer and non-charge transfer quenching pathways. The partial charge transfer parameters, p CT, were obtained and found to be about 0.88 for all complexes except for complexes with f T Δ values lower than 0.25. The correlation of the activation free energies ΔG ≠ of the exciplexes formation with the driving force for charge transfer, ΔG CET, gives a charge transfer character of the exciplexes of about 35.0%.
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Affiliation(s)
- Hossam N Akl
- Department of Chemistry, Faculty of Science, Ain Shams University 11566 Abbassia Cairo Egypt
| | - Dina Salah
- Department of Physics, Faculty of Science, Ain Shams University 11566 Abbassia Cairo Egypt
| | - Hesham S Abdel-Samad
- Department of Chemistry, Faculty of Science, Ain Shams University 11566 Abbassia Cairo Egypt
| | - Ayman A Abdel Aziz
- Department of Chemistry, Faculty of Science, Ain Shams University 11566 Abbassia Cairo Egypt
| | - Ayman A Abdel-Shafi
- Department of Chemistry, Faculty of Science, Ain Shams University 11566 Abbassia Cairo Egypt
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Iridium and Ruthenium Complexes Bearing Perylene Ligands. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227928. [PMID: 36432028 PMCID: PMC9697229 DOI: 10.3390/molecules27227928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/09/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022]
Abstract
The present review summarizes the work carried out mostly in the last decade on iridium and ruthenium complexes bearing various perylene ligands, of particular interest for bioimaging, photodynamic therapy, and solar energy conversion. In these complexes, the absorption spectra and the electrochemical properties are those of the perylene subunit plus those of the metal moiety. In contrast, the emissions are completely changed with respect to perylenes considered alone. Thus, fully organic perylenes are characterized by a strong fluorescence in the visible region, lifetimes of a few nanoseconds, and luminescence quantum yields approaching 100%, whereas perylene Ir and Ru complexes usually do not emit; however, in few cases, weak phosphorescent emissions, with lifetimes in the range of microseconds and relatively low quantum yields, are reported. This is due to a strong interaction between the perylene core and the heavy metal center, taking place after the excitation. Nevertheless, an important advantage deriving from the presence of the heavy metal center is represented by the ability to generate large amounts of singlet oxygen, which plays a key role in photodynamic therapy.
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El-Naggar K, Abdel-Samad HS, Ramadan RM, El-Khouly ME, Abdel-Shafi AA. Participation of fractional charge transfer on the efficiency of singlet oxygen production: Heteroleptic Ruthenium (II) bipyridine derivatives. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ma X, Lu J, Yang P, Zhang Z, Huang B, Li R, Ye R. 8-Hydroxyquinoline-modified ruthenium(II) polypyridyl complexes for JMJD inhibition and photodynamic antitumor therapy. Dalton Trans 2022; 51:13902-13909. [PMID: 36040403 DOI: 10.1039/d2dt01765b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As an ideal scaffold for metal ion chelation, 8-hydroxyquinoline (8HQ) can chelate different metal ions, such as Fe2+, Cu2+, Zn2+, etc. Here, by integrating 8HQ with a ruthenium(II) polypyridyl moiety, two Ru(II)-8HQ complexes (Ru1 and Ru2), [Ru(N-N)2L](PF6)2 (L = 2-(1H-imidazo[4,5-f][1,10]phenanthrolin-2-yl)quinolin-8-ol; N-N: 2,2'-bipyridine (bpy, in Ru1), 1,10-phenanthroline (phen, in Ru2)) were designed and synthesized. In both complexes, ligand L is an 8HQ derivative designed to chelate the cofactor Fe2+ of jumonji C domain-containing demethylase (JMJD). As expected, Ru1 and Ru2 could inhibit the activity of JMJD by chelating the key cofactor Fe2+ of JMJD, resulting in the upregulation of histone-methylation levels in human lung cancer (A549) cells, and the upregulation was more pronounced under light conditions. In addition, MTT data showed that Ru1 and Ru2 exhibited lower dark toxicity, and light irradiation could significantly enhance their antitumor activity. The marked photodynamic activities of Ru1 and Ru2 could induce the elevation of reactive oxygen species (ROS), depolarization of mitochondrial membrane potential (MMP), and activation of caspases. These mechanistic studies indicated that Ru1 and Ru2 could induce apoptosis through the combination of JMJD inhibitory and PDT activities, thereby achieving dual antitumor effects.
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Affiliation(s)
- Xiurong Ma
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
| | - Junjian Lu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
| | - Peixin Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
| | - Zheng Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
| | - Bo Huang
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, P. R. China.
| | - Rongtao Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
| | - Ruirong Ye
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. China.
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Jain A, Winkel BS, Brewer KJ. Photodynamic antimicrobial studies on a Ruthenium-based metal complex. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120996] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Uranyl Salen-Type Complex as Co-catalyst for Electrocatalytic Oxidation of Ethanol. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00697-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Jain A, Garrett NT, Malone ZP. Ruthenium-based Photoactive Metalloantibiotics †. Photochem Photobiol 2021; 98:6-16. [PMID: 33882620 DOI: 10.1111/php.13435] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/14/2021] [Indexed: 12/15/2022]
Abstract
Antibiotic resistance is one of the world's most urgent public health problems. Antimicrobial photodynamic therapy (aPDT) is a promising therapy to combat the growing threat of antibiotic resistance. The aPDT combines a photosensitizer and light to generate reactive oxygen species to induce bacterial inactivation. Ruthenium polypyridyl complexes are significant because they possess unique photophysical properties that allow them to produce reactive oxygen species upon photoirradiation, which leads to cytotoxicity. These antimicrobial agents cause bacterial cell death by DNA and cytoplasmic membrane damage. This article presents a comprehensive review of photoactive antimicrobial properties of kinetically inert and labile ruthenium complexes, nanoparticles coupled photoactive ruthenium complexes, and photoactive ruthenium nanoparticles. Additionally, limitations of current ruthenium-based photoactive antimicrobial agents and future directions for the development of antibiotic-resistant photoactive antimicrobial agents are discussed. It is important to raise awareness for the ruthenium-based aPDT agents in order to develop a new class of photoactive metalloantibiotics capable of combating antibiotic resistance.
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Affiliation(s)
- Avijita Jain
- Madia Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA
| | - Noah T Garrett
- Madia Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA
| | - Zachary P Malone
- Madia Department of Chemistry, Indiana University of Pennsylvania, Indiana, PA
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10
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Santos DC, Maia PJS, de Abreu Lopes MA, Forero JSB, de Souza ALF. A Simple Isoniazid-Based N-Acylhydrazone Derivative as Potential Fluorogenic Probe for Zn 2+ Ions. J Fluoresc 2020; 31:175-184. [PMID: 33188635 DOI: 10.1007/s10895-020-02651-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 11/09/2020] [Indexed: 12/31/2022]
Abstract
This study evaluated three isoniazid-based N-acylhydrazone derivatives (HL1, HL2, and HL3) varying their substituting groups (-H, -N(CH3)2, and -NO2) as potential chemosensors for Zn2+ ions. To this end, the absorption and emission properties of these derivatives were investigated in the presence of Zn2+ ions. Results point to the derivative HL2 as the best chemosensor for Zn2+ ions because of its comparatively higher sensitivity. The color of this derivative changed from colorless to strong yellow with zinc addition, as indicated by the shift in UV-vis spectrum. Moreover, HL2 was the only derivative to emit fluorescence in the presence of Zn2+ ions, attributable to PET inhibition and bond isomerization promoted by coordination with this metal. LOD, LOQ, and binding constant values for HL2 + Zn2+ were 0.43 μmol.l-1, 0.93 μmol.l-1, and 5.04 × 1012 l.mol-1, respectively. The fluorescence of HL2 with other metal ions (Fe3+, Mg2+, Na+, Cd2+, Cu2+, Co2+, Ni2+, Ca2+, and K+) was also investigated. Zn2+ yielded the best result without Cd2+ interferences. Job's Plot showed that the stoichiometric ratio of the complex formed by HL2 and Zn2+ ions is 2:1 (ligand:metal). The strip test with adsorbed HL2 indicated fluorescence in the presence of zinc ions under 365 nm UV irradiation.
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Affiliation(s)
- Daniela Corrêa Santos
- Universidade Federal do Rio de Janeiro, Campus Macaé Professor Aloísio Teixeira, CEP, Macaé, RJ, 27930-560, Brazil.,Instituto de Macromoléculas, Universidade Federal do Rio de Janeiro, Cidade Universitária, CEP, Rio de Janeiro, RJ, 21941-598, Brazil
| | - Paulo José Sousa Maia
- Universidade Federal do Rio de Janeiro, Campus Macaé Professor Aloísio Teixeira, CEP, Macaé, RJ, 27930-560, Brazil
| | - Marcos Antonio de Abreu Lopes
- Universidade Federal do Rio de Janeiro, Campus Macaé Professor Aloísio Teixeira, CEP, Macaé, RJ, 27930-560, Brazil.,Pós-Graduação em Química (PGQu), Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, CEP21941-909, Brazil
| | - Josué Sebastián Bello Forero
- Pós-Graduação em Química (PGQu), Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, CEP21941-909, Brazil
| | - Andréa Luzia Ferreira de Souza
- Universidade Federal do Rio de Janeiro, Campus Macaé Professor Aloísio Teixeira, CEP, Macaé, RJ, 27930-560, Brazil. .,Pós-Graduação em Química (PGQu), Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, RJ, CEP21941-909, Brazil.
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11
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Salazar SB, Simões RS, Pedro NA, Pinheiro MJ, Carvalho MFNN, Mira NP. An Overview on Conventional and Non-Conventional Therapeutic Approaches for the Treatment of Candidiasis and Underlying Resistance Mechanisms in Clinical Strains. J Fungi (Basel) 2020; 6:E23. [PMID: 32050673 PMCID: PMC7151124 DOI: 10.3390/jof6010023] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 02/06/2023] Open
Abstract
Fungal infections and, in particular, those caused by species of the Candida genus, are growing at an alarming rate and have high associated rates of mortality and morbidity. These infections, generally referred as candidiasis, range from common superficial rushes caused by an overgrowth of the yeasts in mucosal surfaces to life-threatening disseminated mycoses. The success of currently used antifungal drugs to treat candidiasis is being endangered by the continuous emergence of resistant strains, specially among non-albicans Candida species. In this review article, the mechanisms of action of currently used antifungals, with emphasis on the mechanisms of resistance reported in clinical isolates, are reviewed. Novel approaches being taken to successfully inhibit growth of pathogenic Candida species, in particular those based on the exploration of natural or synthetic chemicals or on the activity of live probiotics, are also reviewed. It is expected that these novel approaches, either used alone or in combination with traditional antifungals, may contribute to foster the identification of novel anti-Candida therapies.
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Affiliation(s)
- Sara B. Salazar
- Department of Bioengineering, Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (S.B.S.); (R.S.S.); (N.A.P.); (M.J.P.)
| | - Rita S. Simões
- Department of Bioengineering, Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (S.B.S.); (R.S.S.); (N.A.P.); (M.J.P.)
| | - Nuno A. Pedro
- Department of Bioengineering, Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (S.B.S.); (R.S.S.); (N.A.P.); (M.J.P.)
| | - Maria Joana Pinheiro
- Department of Bioengineering, Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (S.B.S.); (R.S.S.); (N.A.P.); (M.J.P.)
| | - Maria Fernanda N. N. Carvalho
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal;
| | - Nuno P. Mira
- Department of Bioengineering, Institute of Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal; (S.B.S.); (R.S.S.); (N.A.P.); (M.J.P.)
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da Silva AMB, Serrão NO, de Gusmão Celestino G, Takeno ML, Antunes NTB, Iglauer S, Manzato L, de Freitas FA, Maia PJS. Removal of rhodamine 6G from synthetic effluents using Clitoria fairchildiana pods as low-cost biosorbent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:2868-2880. [PMID: 31836972 DOI: 10.1007/s11356-019-07114-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/19/2019] [Indexed: 06/10/2023]
Abstract
Many organic dye pollutants have been identified in rivers and lakes around the world, and concern is growing with them as they cause serious changes in the ecological balance of aquatic environments. One of these dyes is rhodamine R6G, which is very water-soluble and has a high corrosive power. Therefore, Clitoria fairchildiana (CF) pods were used as a biosorbent to remove R6G from synthetic dye effluents. CF was characterized by infrared spectroscopy, thermogravimetric analysis, x-ray diffraction, elemental analysis, Boehm titration, and zero charge point measurements. The influence of various factors, such as solution pH, contact time, adsorbent mass, and concentration of R6G, was studied using batch equilibrium experiments. The optimum contact time to reach equilibrium was found to be 15 min, while the optimum adsorbent dose was 8 g L-1. The maximum adsorption capacity of CF (73.84 mg g-1) was observed at pH 6.4 and 298.15 K. Adsorption kinetics followed a pseudo-second-order law, and the isotherm could be best fitted with a Liu model. The obtained thermodynamic parameters indicate that the adsorption of R6G is spontaneous and enthalpy-driven. We thus conclude that CF is an efficient, green, and readily available biosorbent for dye removal from wastewater.
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Affiliation(s)
| | - Naiany Oliveira Serrão
- Institute of Exact Sciences and Technology, Federal University of Amazonas, Itacoatiara, Amazonas, 69103128, Brazil
| | - Gustavo de Gusmão Celestino
- Campus Macaé Professor Aloísio Teixeira, Polo Universitário, Federal University of Rio de Janeiro, Macaé, Rio de Janeiro, 27930-560, Brazil
| | - Mitsuo Lopes Takeno
- Federal Institute of Amazonas - IFAM, Distrito Industrial, Manaus, AM, Brazil
| | - Nicanor Tiago Bueno Antunes
- Institute of Exact Sciences and Technology, Federal University of Amazonas, Itacoatiara, Amazonas, 69103128, Brazil
| | - Stefan Iglauer
- Edith Cowen University, 270 Joondalup Dr, Joondalup, WA, 6027, Australia
| | - Lizandro Manzato
- Federal Institute of Amazonas - IFAM, Distrito Industrial, Manaus, AM, Brazil
| | | | - Paulo José Sousa Maia
- Institute of Exact Sciences and Technology, Federal University of Amazonas, Itacoatiara, Amazonas, 69103128, Brazil.
- Campus Macaé Professor Aloísio Teixeira, Polo Universitário, Federal University of Rio de Janeiro, Macaé, Rio de Janeiro, 27930-560, Brazil.
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13
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Okutan E, Eserci H, Şenkuytu E. New perylenebisimide decorated cyclotriphosphazene heavy atom free conjugate as singlet oxygen generator. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117232. [PMID: 31177003 DOI: 10.1016/j.saa.2019.117232] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/27/2019] [Accepted: 05/31/2019] [Indexed: 06/09/2023]
Abstract
Perylenebisimide-cyclotriphosphazene based inorganic-organic system was synthesized by a multistep procedure. The substitution reaction of asymmetric perylenebisimide (PBI) derivative with the hexachloroyclotriphosphazene (trimer) resulted in the formation of fully PBI decorated cyclotriphosphazene (5). The identity of newly synthesized compound (5) was confirmed by using 31P, 1H and 13C NMR spectroscopies and mass spectrometry. The photophysical (UV- Vis absorption, fluorescence emission, fluorescence lifetime and fluorescence quantum yield) and photochemical (the singlet oxygen generation, and photostability) properties of this conjugate were investigated as novel heavy atom free triplet photosensitizer. The singlet oxygen quantum yield of the PBI-cyclotriphosphazene (5) was calculated to be 0.86 which is good for a heavy atom free triplet photosensitizer. These results will add to the development of cyclotriphosphazene based heavy atom free singlet oxygen triplet photosensitizer systems for applications in organic oxygenation reactions.
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Affiliation(s)
- Elif Okutan
- Department of Chemistry, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey.
| | - Hande Eserci
- Department of Chemistry, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
| | - Elif Şenkuytu
- Department of Chemistry, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
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14
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Alazaly AM, Amer AS, Fathi AM, Abdel-Shafi AA. Photoacids as singlet oxygen photosensitizers: Direct determination of the excited state acidity by time-resolved spectroscopy. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.07.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Pibiri I, Buscemi S, Palumbo Piccionello A, Pace A. Photochemically Produced Singlet Oxygen: Applications and Perspectives. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800076] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ivana Pibiri
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche - STEBICEF; Università degli Studi di Palermo; Viale delle Scienze, Edificio 17 - 90128 Palermo Italy
| | - Silvestre Buscemi
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche - STEBICEF; Università degli Studi di Palermo; Viale delle Scienze, Edificio 17 - 90128 Palermo Italy
| | - Antonio Palumbo Piccionello
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche - STEBICEF; Università degli Studi di Palermo; Viale delle Scienze, Edificio 17 - 90128 Palermo Italy
| | - Andrea Pace
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche - STEBICEF; Università degli Studi di Palermo; Viale delle Scienze, Edificio 17 - 90128 Palermo Italy
- Dipartimento di Scienze per l'Innovazione Tecnologica; Istituto EuroMediterraneo di Scienza e Tecnologia - IEMEST; Via Michele Miraglia, 20 - 90139 - Palermo Italy
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16
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Aksakal NE, Kazan HH, Eçik ET, Yuksel F. A novel photosensitizer based on a ruthenium(ii) phenanthroline bis(perylenediimide) dyad: synthesis, generation of singlet oxygen andin vitrophotodynamic therapy. NEW J CHEM 2018. [DOI: 10.1039/c8nj02944j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In this study, a novel photosensitizer having two perylenediimide units and a phenanthroline ruthenium(ii) coordination moiety (Ru-BP)has been developed for photodynamic therapy (PDT) of cancer cells.
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Affiliation(s)
- Nuray Esra Aksakal
- Department of Chemistry
- Faculty of Science
- Gebze Technical University
- Kocaeli
- Turkey
| | - Hasan Hüseyin Kazan
- Department of Biological Sciences
- Middle East Technical University
- Ankara
- Turkey
| | - Esra Tanrıverdi Eçik
- Department of Chemistry
- Faculty of Science
- Gebze Technical University
- Kocaeli
- Turkey
| | - Fatma Yuksel
- Department of Chemistry
- Faculty of Science
- Gebze Technical University
- Kocaeli
- Turkey
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