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Bouaziz C, Seraghni N, Sellam B, Sangare S, Belaidi S, Debbache N, Sehili T. Photochemistry of the Fe(III)-iminodiacetic acid complex under UVA and UV/Vis irradiation: synthesis and characterisation. ENVIRONMENTAL TECHNOLOGY 2024; 45:4073-4088. [PMID: 37519279 DOI: 10.1080/09593330.2023.2240503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 06/11/2023] [Indexed: 08/01/2023]
Abstract
The photochemistry of Fe(III)-Iminodiacetic acid complex (Fe(III)-IDA) was studied under UVA and UV/Vis irradiation. The synthesis was realised via molar ratio method modified by reaction of IDA as ligand with Fe(III) as metal. The interaction of Fe(III) with IDA was characterised using Fourier-transform infrared (FTIR) and spectroscopy UV-visible. The results confirmed the stability of the complex at pH > 5; with constant of stability (Log β = 10.02) and stoichiometry Fe(III): IDA = 1:1. In addition, the redox potential was calculated at 521 mV, which is significantly lower than E° for the Fe(III)/Fe(II) couple. The photolysis of this complex in the presence of UVA light and UV/Vis light at different pHs was carried out. This photolysis was followed by several assay Fe(II) and •OH. The results show that the Fe(III)-IDA complex present a photo-reactivities under either light source and the phenomenon is faster when the UV/Vis was used. The initial conversion rate (r0) decreased with increasing of initial pH. The formation of hydroxyl radicals via the Fenton reaction was improved at pH = 2.12 for both irradiation sources used. Reduction of total organic carbon was also studied using the total organic carbon (TOC). The feasibility of amino iron complexes to improve the Fenton process under irradiation was confirmed. Additionally, our research also evidenced the optimal conditions for the formation of hydroxyl radicals; which are the key factor in remove pharmaceuticals pollutants in aqueous media. Based on the results obtained, the Fe(III)-IDA complex could be efficiently photolysis under UV/Vis light.
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Affiliation(s)
- Chaima Bouaziz
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Nassira Seraghni
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Badreddine Sellam
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Sadio Sangare
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Sihem Belaidi
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Nadra Debbache
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
| | - Tahar Sehili
- Laboratoire des Sciences et Technologies de l'Environnement (LSTE), Département de Chimie, Faculté des Sciences Exactes, Université Frères Mentouri Constantine1, Constantine, Algeria
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Toporivska Y, Mular A, Piasta K, Ostrowska M, Illuminati D, Baldi A, Albanese V, Pacifico S, Fritsky IO, Remelli M, Guerrini R, Gumienna-Kontecka E. Thermodynamic Stability and Speciation of Ga(III) and Zr(IV) Complexes with High-Denticity Hydroxamate Chelators. Inorg Chem 2021; 60:13332-13347. [PMID: 34414758 PMCID: PMC8424644 DOI: 10.1021/acs.inorgchem.1c01622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Increasing attention
has been recently devoted to 89Zr(IV) and 68Ga(III) radionuclides, due to their favorable
decay characteristics for positron emission tomography (PET). In the
present paper, a deep investigation is presented on Ga(III) and Zr(IV)
complexes with a series of tri-(H3L1, H3L3, H3L4 and desferrioxamine
E, DFOE) and tetrahydroxamate (H4L2) ligands. Herein, we describe the rational
design and synthesis of two cyclic complexing agents (H3L1 and H4L2) bearing three and four hydroxamate
chelating groups, respectively. The ligand structures allow us to
take advantage of the macrocyclic effect; the H4L2 chelator contains an additional side
amino group available for a possible further conjugation with a biomolecule.
The thermodynamic stability of Ga(III) and Zr(IV) complexes in solution
has been measured using a combination of potentiometric and pH-dependent
UV–vis titrations, on the basis of metal–metal competition.
The Zr(IV)-H4L2 complex
is characterized by one of the highest formation constants reported
to date for a tetrahydroxamate zirconium chelate (log β = 45.9,
pZr = 37.0), although the complex-stability increase derived from
the introduction of the fourth hydroxamate binding unit is lower than
that predicted by theoretical calculations. Solution studies on Ga(III)
complexes revealed that H3L1 and H4L2 are stronger chelators in comparison to DFOB. The complex stability
obtained with the new ligands is also compared with that previously
reported for other hydroxamate ligands. In addition to increasing
the library of the thermodynamic stability data of Ga(III) and Zr(IV)
complexes, the present work allows new insights into Ga(III) and Zr(IV)
coordination chemistry and thermodynamics and broadens the selection
of available chelators for 68Ga(III) and 89Zr(IV). Solution equilibria studies on Ga(III)
and Zr(IV) complexes
with a series of tri- and tetrahydroxamate ligands are presented.
For this purpose, the rational design and synthesis of two cyclic
complexing agents bearing three and four hydroxamate chelating groups
was performed. The thermodynamic and speciation studies allow a discussion
of the structure−complex stability dependence. The Zr(IV)-tetrahydroxamate
complex is characterized by one of the highest formation constants
reported to date for a hydroxamate zirconium chelator.
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Affiliation(s)
- Yuliya Toporivska
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Andrzej Mular
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Karolina Piasta
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Małgorzata Ostrowska
- University of Wroclaw, Faculty of Chemistry, 14 F. Joliot-Curie, 50-383 Wrocław, Poland
| | - Davide Illuminati
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Andrea Baldi
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Valentina Albanese
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Salvatore Pacifico
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Igor O Fritsky
- Taras Shevchenko National University of Kyiv, Department of Chemistry, 64 Volodymyrska Str., 01601 Kyiv, Ukraine
| | - Maurizio Remelli
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
| | - Remo Guerrini
- University of Ferrara, Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, 46 Via Luigi Borsari, 44121 Ferrara, Italy
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3
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Capillary method and molecular dynamics study of the diffusion and molecular structures of vanadium(IV)-ligand complexes. J Radioanal Nucl Chem 2021. [DOI: 10.1007/s10967-021-07898-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Martin-Benlloch X, Haid S, Novodomska A, Rominger F, Pietschmann T, Davioud-Charvet E, Elhabiri M. Physicochemical Properties Govern the Activity of Potent Antiviral Flavones. ACS OMEGA 2019; 4:4871-4887. [PMID: 31459671 PMCID: PMC6648324 DOI: 10.1021/acsomega.8b03332] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 02/19/2019] [Indexed: 06/10/2023]
Abstract
Ladanein (i.e., 5,6,7-trihydroxylated flavone) was demonstrated to act as a powerful virucidal agent toward a broad range of enveloped virus particles. Fe(III) coordination and pH are indeed among the key parameters that might favor both bioactivation of the flavone and consequent host cell entry inhibition. In this present work, the impact of fluorinated groups on the physicochemical and antiviral properties of the flavone was investigated, thus allowing a deeper understanding of the antiviral mode of action. The improved synthesis of ladanein allowed accessing a broad range of analogues, some of them being significantly more active than the former ladanein lead compound. We first determined the acido-basic properties of this homogenous series of compounds and then investigated their electrochemical behavior. Fe(III) coordination properties (stability, spectral behavior, and kinetics) of ladanein and its analogues were then examined (quasiphysiological conditions) and provided key information of their stability and reactivity. Using the determined physicochemical parameters, the critical impact of the iron complexation and medium acidity was confirmed on hepatitis C virus (HCV) particles (pre)treated with ladanein. Finally, a preliminary structure-HCV entry inhibition relationship study evidenced the superior antiviral activity of the ladanein analogues bearing an electron-withdrawing group in para position (FCF 3 > FOCF 3 > FFCF 3 > FF > FOMe) on the B cycle in comparison with the parent ladanein itself.
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Affiliation(s)
- Xavier Martin-Benlloch
- Université
de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR
7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Sibylle Haid
- Institute of Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research;
A Joint Venture of the Medical School Hannover (MHH) and the Helmholtz
Centre for Infection Research (HZI), Feodor-Lynen-Str. 7, 30625 Hannover, Germany
| | - Alexandra Novodomska
- Université
de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR
7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität
Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Thomas Pietschmann
- Institute of Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research;
A Joint Venture of the Medical School Hannover (MHH) and the Helmholtz
Centre for Infection Research (HZI), Feodor-Lynen-Str. 7, 30625 Hannover, Germany
| | - Elisabeth Davioud-Charvet
- Université
de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR
7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Mourad Elhabiri
- Université
de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR
7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
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Gridchin SN. Thermodynamics of the Stepwise Dissociation of N-Methyliminodiacetic Acid. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418120154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Martin-Benlloch X, Novodomska A, Jacquemin D, Davioud-Charvet E, Elhabiri M. Iron( iii) coordination properties of ladanein, a flavone lead with a broad-spectrum antiviral activity. NEW J CHEM 2018. [DOI: 10.1039/c7nj04867j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The Fe(iii) complexation properties of ladanein, a potent antiviral flavone, and related analogues (negletein and salvigenin), have been studied in solution under quasi-physiological conditions using physico-chemical tools and provided important insights into their stability/reactivity in solution.
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Affiliation(s)
| | - A. Novodomska
- Université de Strasbourg
- Université de Haute-Alsace
- CNRS
- LIMA
- UMR 7042
| | - D. Jacquemin
- Ceisam Laboratory
- UMR CNRS 6230
- University of Nantes
- 44322 Nantes Cedex3
- France
| | | | - M. Elhabiri
- Université de Strasbourg
- Université de Haute-Alsace
- CNRS
- LIMA
- UMR 7042
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8
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Cherrak SA, Mokhtari-Soulimane N, Berroukeche F, Bensenane B, Cherbonnel A, Merzouk H, Elhabiri M. In Vitro Antioxidant versus Metal Ion Chelating Properties of Flavonoids: A Structure-Activity Investigation. PLoS One 2016; 11:e0165575. [PMID: 27788249 PMCID: PMC5082868 DOI: 10.1371/journal.pone.0165575] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 10/13/2016] [Indexed: 01/24/2023] Open
Abstract
Natural flavonoids such as quercetin, (+)catechin and rutin as well as four methoxylated derivatives of quercetin used as models were investigated to elucidate their impact on the oxidant and antioxidant status of human red blood cells (RBCs). The impact of these compounds against metal toxicity was studied as well as their antiradical activities with DPPH assay. Antihemolytic experiments were conducted on quercetin, (+)catechin and rutin with excess of Fe, Cu and Zn (400 μM), and the oxidant (malondialdehyde, carbonyl proteins) and antioxidant (reduced glutathione, catalase activity) markers were evaluated. The results showed that Fe and Zn have the highest prooxidant effect (37 and 33% of hemolysis, respectively). Quercetin, rutin and (+)catechin exhibited strong antioxidant properties toward Fe, but this effect was decreased with respect to Zn ions. However, the Cu showed a weak antioxidant effect at the highest flavonoid concentration (200 μM), while a prooxidant effect was observed at the lowest flavonoid concentration (100 μM). These results are in agreement with the physico-chemical and antiradical data which demonstrated that binding of the metal ions (for FeNTA: (+)Catechin, KLFeNTA = 1.6(1) × 106 M-1 > Rutin, KLFeNTA = 2.0(9) × 105 M-1 > Quercetin, KLFeNTA = 1.0(7) × 105 M-1 > Q35OH, KLFeNTA = 6.3(8.7) × 104 M-1 > Quercetin3’4’OH and Quercetin 3OH, KLFeNTA ~ 2 × 104 M-1) reflects the (anti)oxidant status of the RBCs. This study reveals that flavonoids have both prooxidant and antioxidant activity depending on the nature and concentration of the flavonoids and metal ions.
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Affiliation(s)
- Sabri Ahmed Cherrak
- Laboratory of Physiology, Pathophysiology and Biochemistry of Nutrition, Department of Biology, Faculty of Natural and Life Sciences, Earth and Universe, Abou Bekr Belkaid University, 13000 Tlemcen, Algeria
| | - Nassima Mokhtari-Soulimane
- Laboratory of Physiology, Pathophysiology and Biochemistry of Nutrition, Department of Biology, Faculty of Natural and Life Sciences, Earth and Universe, Abou Bekr Belkaid University, 13000 Tlemcen, Algeria
- * E-mail: (NMS); (ME)
| | - Farid Berroukeche
- Laboratory of Physiology, Pathophysiology and Biochemistry of Nutrition, Department of Biology, Faculty of Natural and Life Sciences, Earth and Universe, Abou Bekr Belkaid University, 13000 Tlemcen, Algeria
| | - Bachir Bensenane
- Laboratory of Physiology, Pathophysiology and Biochemistry of Nutrition, Department of Biology, Faculty of Natural and Life Sciences, Earth and Universe, Abou Bekr Belkaid University, 13000 Tlemcen, Algeria
| | - Angéline Cherbonnel
- Laboratory of Bioorganic and Medicinal Chemistry, UMR 7509 CNRS, ECPM, 25 rue Becquerel, 67200 Strasbourg, France
| | - Hafida Merzouk
- Laboratory of Physiology, Pathophysiology and Biochemistry of Nutrition, Department of Biology, Faculty of Natural and Life Sciences, Earth and Universe, Abou Bekr Belkaid University, 13000 Tlemcen, Algeria
| | - Mourad Elhabiri
- Laboratory of Bioorganic and Medicinal Chemistry, UMR 7509 CNRS, ECPM, 25 rue Becquerel, 67200 Strasbourg, France
- * E-mail: (NMS); (ME)
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9
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Barbano EP, de Carvalho MF, Carlos IA. Electrodeposition and characterization of binary Fe-Mo alloys from trisodium nitrilotriacetate bath. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.04.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Kaur K, Baral M. Ability of two novel α-amino acid-based tridentate ligands to complex Fe3+ in solution. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-014-1689-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Vukosav P, Mlakar M. Speciation of biochemically important iron complexes with amino acids: L-aspartic acid and L-aspartic acid - glycine mixture. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Sun SP, Zeng X, Lemley AT. Kinetics and mechanism of carbamazepine degradation by a modified Fenton-like reaction with ferric-nitrilotriacetate complexes. JOURNAL OF HAZARDOUS MATERIALS 2013; 252-253:155-65. [PMID: 23518173 DOI: 10.1016/j.jhazmat.2013.02.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 02/20/2013] [Accepted: 02/24/2013] [Indexed: 05/26/2023]
Abstract
This study investigated the kinetics and mechanism of carbamazepine (CBZ) degradation over an initial pH range of 5.0-9.0 by a modified Fenton-like reaction using ferric-nitrilotriacetate (Fe(III)-NTA) complexes. The results indicate that CBZ degradation by Fe(III)-NTA/H2O2 can be described by pseudo first-order kinetics and mainly attributed to hydroxyl radical (OH) attack. Ten intermediates were identified during the degradation process, including hydroxy-CBZs, 10,11-epoxy-CBZ, quinonid CBZ derivatives, dihydroxy-CBZs, and hydroxy-CBZ-10,11-diols. The steady-state concentration of OH, ranging from 3.8 × 10(-16) to 2.1 × 10(-13)M, was strongly dependent on the concentration of Fe(III), the initial pH, and H2O2:Fe(III) and NTA:Fe(III) molar ratios. Optimal conditions of [Fe(III)]=1 × 10(-4)M, [H2O2:Fe(III)]=155:1 and [NTA:Fe(III)]=3:1 were obtained for the degradation of CBZ at neutral pH (7.0) and ambient temperature (25 °C); the corresponding degradation rate constant of CBZ, kapp, was 0.0419 (± 0.002) min(-1). The value of kapp increased with increasing pH from 5.0 to 9.0 due to the strong pH-dependence of Fe(III)-NTA complexes; Fe(III)(NTA)(OH)2(2-) was the most likely active iron species to activate H2O2 to produce OH. The temperature dependence of CBZ degradation by Fe(III)-NTA/H2O2 was characterized by an activation energy of 76.16 kJ mol(-1). A potential mechanism for the formation of OH by Fe(III)-NTA/H2O2 and possible degradation pathways of CBZ are proposed.
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Affiliation(s)
- Sheng-Peng Sun
- Graduate Field of Environmental Toxicology, Cornell University, FSAD, 273 HEB, Ithaca, NY 14853, United States
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13
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Complexation of Tungsten(VI) with Methyliminodiacetic Acid at Different Ionic Strengths. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9910-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Vukosav P, Mlakar M, Tomišić V. Revision of iron(III)–citrate speciation in aqueous solution. Voltammetric and spectrophotometric studies. Anal Chim Acta 2012; 745:85-91. [DOI: 10.1016/j.aca.2012.07.036] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 07/17/2012] [Accepted: 07/26/2012] [Indexed: 10/28/2022]
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15
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Shah AD, Kim JH, Huang CH. Tertiary amines enhance reactions of organic contaminants with aqueous chlorine. WATER RESEARCH 2011; 45:6087-6096. [PMID: 21968217 DOI: 10.1016/j.watres.2011.09.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/30/2011] [Accepted: 09/03/2011] [Indexed: 05/31/2023]
Abstract
Through various anthropogenic inputs, tertiary amines can readily contaminate wastewater and drinking water sources and can form chlorammonium species (R(3)N(+)-Cl) during aqueous chlorine disinfection. This study investigated the less understood concept that these chlorammonium species can potentially enhance organic contaminant loss and increase disinfection byproduct formation to a greater extent than aqueous chlorine. Tertiary amines' effectiveness was highly dependent on amine structure as trimethylamine (TMA) and 4-morpholineethanesulfonic acid (MES) enhanced organic contaminant loss, while others (nitrilotriacetic acid (NTA) and creatinine (CRE)) were ineffective. MES addition up to 25 μM led to increased organic contaminant chlorination by up to three orders of magnitude while observing pseudo-first order kinetic behavior and a linear amine dose response. TMA addition up to 0.5 μM accelerated organic contaminant chlorination by almost two orders of magnitude, but occasionally deviated from pseudo-first order kinetics with incomplete organic contaminant degradation and a non-linear amine dose response - a result linked to TMA's rapid auto-decomposition over time. Byproduct formation was identical with and without amine addition, and thus the chlorination mechanisms are likely similar to aqueous chlorine. Results from this study improve the mechanistic understanding behind tertiary amine-enhanced chlorination.
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Affiliation(s)
- Amisha D Shah
- School of Civil and Environmental Engineering, Georgia Institute of Technology, 200 Bobby Dodd Way, Atlanta, GA 30332, USA
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16
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De Laat J, Dao YH, El Najjar NH, Daou C. Effect of some parameters on the rate of the catalysed decomposition of hydrogen peroxide by iron(III)-nitrilotriacetate in water. WATER RESEARCH 2011; 45:5654-5664. [PMID: 21920579 DOI: 10.1016/j.watres.2011.08.028] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 08/12/2011] [Accepted: 08/15/2011] [Indexed: 05/31/2023]
Abstract
The decomposition rate of H(2)O(2) by iron(III)-nitrilotriacetate complexes (Fe(III)NTA) has been investigated over a large range of experimental conditions: 3 < pH < 11, [Fe(III)](T,0): 0.05-1 mM; [NTA](T,0)/[Fe(III)](T,0) molar ratios : 1-250; [H(2)O(2)](0): 1 mM-4 M) and concentrations of HO· radical scavengers: 0-53 mM. Spectrophotometric analyses revealed that reactions of H(2)O(2) with Fe(III)NTA (1 mM) at neutral pH immediately lead to the formation of intermediates (presumably peroxocomplexes of Fe(III)NTA) which absorb light in the region 350-600 nm where Fe(III)NTA and H(2)O(2) do not absorb. Kinetic experiments showed that the decomposition rates of H(2)O(2) were first-order with respect to H(2)O(2) and that the apparent first-order rate constants were found to be proportional to the total concentration of Fe(III)NTA complexes, were at a maximum at pH 7.95 ± 0.10 and depend on the [NTA](T,0)/[Fe(III)](T,0) and [H(2)O(2)](0)/[Fe(III)](T,0) molar ratios. The addition of increasing concentrations of tert-butanol or sodium bicarbonate significantly decreased the decomposition rate of H(2)O(2), suggesting the involvement of HO· radicals in the decomposition of H(2)O(2). The decomposition of H(2)O(2) by Fe(III)NTA at neutral pH was accompanied by a production of dioxygen and by the oxidation of NTA. The degradation of the organic ligand during the course of the reaction led to a progressive decomplexation of Fe(III)NTA followed by a subsequent precipitation of iron(III) oxyhydroxides and by a significant decrease in the catalytic activity of Fe(III) species for the decomposition of H(2)O(2).
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Affiliation(s)
- Joseph De Laat
- Université de Poitiers, Laboratoire de Chimie et Microbiologie de l'Eau (CNRS UMR 6008), Ecole Nationale Supérieure d'Ingénieurs de Poitiers, Poitiers, France.
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17
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Pyreu DF, Kozlovskii EV, Gruzdev MS. Mixed-ligand complexation of iron(III) ethylenediaminetetraacetate with iminodiacetate and ethylenediamine in aqueous solution. RUSS J COORD CHEM+ 2010. [DOI: 10.1134/s1070328410040093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Van Leeuwen HP, Town RM. Protonation effects on dynamic flux properties of aqueous metal complexes. ACTA ACUST UNITED AC 2009. [DOI: 10.1135/cccc2009091] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The degree of (de)protonation of aqueous metal species has significant consequences for the kinetics of complex formation/dissociation. All protonated forms of both the ligand and the hydrated central metal ion contribute to the rate of complex formation to an extent weighted by the pertaining outer-sphere stabilities. Likewise, the lifetime of the uncomplexed metal is determined by all the various protonated ligand species. Therefore, the interfacial reaction layer thickness, μ, and the ensuing kinetic flux, Jkin, are more involved than in the conventional case. All inner-sphere complexes contribute to the overall rate of dissociation, as weighted by their respective rate constants for dissociation, kd. The presence of inner-sphere deprotonated H2O, or of outer-sphere protonated ligand, generally has a great impact on kd of the inner-sphere complex. Consequently, the overall flux can be dominated by a species that is a minor component of the bulk speciation. The concepts are shown to provide a good description of experimental stripping chronopotentiometric data for several protonated metal–ligand systems.
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Zhang CX, Zhang Y, Cui C. Synthesis, structure, and properties of a 1-D copper(II) complex with nitronyl nitroxide radicals. J COORD CHEM 2009. [DOI: 10.1080/00958970902756457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Chen-Xi Zhang
- a College of Science, Tianjin University of Science and Technology , Tianjin 300457, People's Republic of China
| | - Yuying Zhang
- b Department of Chemistry , NanKai University , Tianjin 300071, People's Republic of China
| | - Chunxian Cui
- a College of Science, Tianjin University of Science and Technology , Tianjin 300457, People's Republic of China
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Adsorption of alpha amino acids at the water/goethite interface. J Colloid Interface Sci 2008; 319:416-28. [DOI: 10.1016/j.jcis.2007.11.046] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2007] [Revised: 11/08/2007] [Accepted: 11/18/2007] [Indexed: 11/23/2022]
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Elhabiri M, Carrër C, Marmolle F, Traboulsi H. Complexation of iron(III) by catecholate-type polyphenols. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.07.110] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Meier R, Molinier M, Anson C, Powell AK, Kallies B, van Eldik R. Structure of sodium bis(N-methyl-iminodiacetato)iron(iii): trans-meridional N-coordination in the solid state and in solution. Dalton Trans 2006:5506-14. [PMID: 17117220 DOI: 10.1039/b605056e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The results of a detailed solid state and solution structural study of the Fe(III) bis-mida complex [Fe(III)(mida)(2)]- (mida = N-methyl-iminodiacetate) are reported. The structure of the sodium salt Na[Fe(mida)2][NaClO4]2.3H2O (1) was determined by single-crystal X-ray analysis. The complex anion in 1 contains a six-coordinate Fe(III) centre bound to two tridentate mida ligands arranged in the meridional configuration, and the mer Fe(III)N2O4 chromophore shows a high degree of distortion from regular octahedral symmetry. Raman- and UV/VIS/NIR spectroscopic measurements showed that no gross changes take place in the Fe(III) coordination sphere upon redissolution in water. Quantum chemical calculations of all three possible configurations of the [Fe(mida)2]- complex ion in the gas phase support the finding that the mer isomer is more stable than the u-fac (cis) and s-fac (trans) isomers. Redox potential measurements of the Fe(III/II)(mida) couple in dependence of pH led to the following values for the equilibrium contants: log beta(III)(101) = 11.98 +/- 0.05, log beta(III)(102) = 20.49 +/- 0.01, pK(III)(a1 OH) = 7.81; log beta(II)(101) = 6.17 +/- 0.01, log beta(II)(102) = 11.39 +/- 0.01.
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Affiliation(s)
- Roland Meier
- Institut für Anorganische Chemie, Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058, Erlangen, Germany
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Cuculić V, Pižeta I, Branica M. Voltammetry of Dissolved Iron(III)-Nitrilotriacetate-Hydroxide System in Water Solution. ELECTROANAL 2005. [DOI: 10.1002/elan.200403342] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hua G, Zhang Q, McManus D, Slawin AMZ, Woollins JD. Novel aqueous chelating agents for catalytic oxidation of hydrogen sulfide to sulfur by air. MAIN GROUP CHEMISTRY 2005. [DOI: 10.1080/10241220500349644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kalita B, Nicholas KM. Synthesis of α-substituted iminodiacetate ligands: α-hexadienyl derivatives for the selection of lipoxygenase mimics. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.08.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gabricević M, Crumbliss AL. Kinetics and mechanism of iron(III)-nitrilotriacetate complex reactions with phosphate and acetohydroxamic acid. Inorg Chem 2003; 42:4098-101. [PMID: 12817967 DOI: 10.1021/ic026281o] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The kinetics and mechanism of the substitution of coordinated water in nitrilotriacetate complexes of iron(III) (Fe(NTA)(OH(2))(2) and Fe(NTA)(OH(2))(OH)(-)) by phosphate (H(2)PO(4)(-) and HPO(4)(2)(-)) and acetohydroxamic acid (CH(3)C(O)N(OH)H) were investigated. The phosphate reactions were found to be pH dependent in the range of 4-8. Phosphate substitution rates are independent of the degree of phosphate protonation, and pH dependence is due to the difference in reactivity of Fe(NTA)(OH(2))(2) (k = 3.6 x 10(5) M(-)(1) s(-)(1)) and Fe(NTA)(OH(2))(OH)(-) (k = 2.4 x 10(4) M(-)(1) s(-)(1)). Substitution by acetohydroxamic acid is insensitive to pH in the range of 4-5.2, and Fe(NTA)(OH(2))(2) and Fe(NTA)(OH(2))(OH)(-) react at equivalent rates (k = 4.2 x 10(4) and 3.8 x 10(4) M(-)(1) s(-)(1), respectively). Evidence for acid-dependent and acid-independent back-reactions was obtained for both the phosphate and acetohydroxamate complexes. Reactivity patterns were analyzed in the context of NTA labilization of coordinated water, and outer-sphere electrostatic and H-bonding influences were analyzed in the precursor complex (K(os)).
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Affiliation(s)
- Mario Gabricević
- Department of Chemistry, Duke University, Box 90346, Durham, North Carolina 27708-0346, USA
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