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Furia E, Lettera V, Napoli A, Aiello D. Insights on Stability Constants and Structures of Complexes between Coumarin Derivatives and Pb(II) in Aqueous Media. Molecules 2024; 29:1911. [PMID: 38731402 PMCID: PMC11085526 DOI: 10.3390/molecules29091911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 05/13/2024] Open
Abstract
In the frame of a systematic study on the sequestering ability of natural antioxidants towards metal cations, here the complexation of coumarin-3-carboxilic acid (HCCA) with Pb(II) and the overall stability constants of the resulting complexes, at 37 °C and in 0.16 M NaClO4, are discussed. Reaction of Pb(ClO4)2 with HCCA in an aqueous medium at a pH range from 2 to 6 and various ratios (1:1-1:10) yielded the Pb-CCA complexes, which were characterized spectrometrically by laser desorption ionization mass spectrometry (LD-MS). LD-MS has provided the composition and structure of Pb-CCA species according to the speciation model proposed on the basis of the potentiometric data. The graphic representation of the complex's concentration curves is given by the distribution diagram, which provides a whole depiction of the species present in the solution at the selected pH ranges.
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Affiliation(s)
| | | | | | - Donatella Aiello
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende, Italy; (E.F.); (V.L.); (A.N.)
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Truong DH, Lan Nguyen TH, Dao DQ. Revisiting the HO ●-initiated oxidation of L-proline amino acid in the aqueous phase: influence of transition metal ions. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230114. [PMID: 37293362 PMCID: PMC10245202 DOI: 10.1098/rsos.230114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 05/02/2023] [Indexed: 06/10/2023]
Abstract
The oxidation of L-proline (Pro) by HO● radical in water and the influence of transition metal ions on this process has been revisited by using the density functional theory (DFT) method at the M05-2X/6-311 + + G(3df,3pd)//M05-2X/6-311 + + G(d,p) level of theory at the temperature of 298.15 K. The main reactive sites of the HO●-initiated oxidation of Pro via hydrogen atom transfer (HAT) reactions are at the β- and γ-carbon, with the branching ratios being 44.6% and 39.5%, respectively. The overall rate constant at 298.15 K is 6.04 × 108 M-1 s-1. In addition, Pro tends to form stable complexes with both Fe and Cu ions via the -COO functional group of dipole-salt form. The most stable Cu(II)-Pro complexes have high oxidant risks in enhancing the HO● formation in the presence of reducing agents. Besides this, the high oxidation state metal complexes, i.e. Fe(III)-Pro and Cu(II)-Pro, may be oxidized by HO● radical via HAT reactions but with a lower rate constant than that of free-Pro. By contrast, the low oxidation state metal complexes (i.e. Fe(II)-Pro and Cu(I)-Pro) have higher oxidation risks than the free ligands, and thus, the complexation enhances the oxidation of Pro amino acid.
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
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Truong DH, Ngo TC, Nguyen THL, Dao DQ. Oxidation of l-leucine amino acid initiated by hydroxyl radical: are transition metal ions an enhancement factor? ROYAL SOCIETY OPEN SCIENCE 2022; 9:220316. [PMID: 36117865 PMCID: PMC9470255 DOI: 10.1098/rsos.220316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/22/2022] [Indexed: 06/10/2023]
Abstract
Hydroxyl radical (HO·) formation initiated by the Fenton-type reactions of Fe and Cu complexes of l-leucine (Leu) amino acid as well as its oxidation reaction by HO· was computationally investigated by using the density functional theory method at the M05-2X/6-311++G(3df,2pd)//M05-2X/6-311++G(d,p) level of theory in the aqueous phase. The results showed that dipole-salt is the main form of Leu in the physiological condition. Leu exhibits high chelating potential towards both Fe(III)/Fe(II) and Cu(II)/Cu(I) ions with the most favourable coordinating positions at two oxygen atoms of the -COO functional group. Furthermore, the Leu-ions complexes show a high risk of HO· formation via Fenton-like reactions, especially when ascorbate anion exists in the environment as a reducing agent. Finally, the oxidation reaction of l-leucine by HO· demonstrated a relatively high overall apparent reaction rate, k overall, being 1.18 × 109 M-1 s-1, in which formal hydrogen transfer reactions of the dipole-salt form occur as the primary mechanism. Consequently, the Leu oxidation by HO· radical can be promoted by the Fenton reaction enhancement of its transition metal complexes.
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
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Truong DH, Ngo TC, Nhung NTA, Quang DT, Nguyen TLA, Khiri D, Taamalli S, Louis F, El Bakali A, Dao DQ. New insights into the competition between antioxidant activities and pro-oxidant risks of rosmarinic acid. RSC Adv 2022; 12:1499-1514. [PMID: 35425185 PMCID: PMC8978883 DOI: 10.1039/d1ra07599c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/11/2021] [Indexed: 12/18/2022] Open
Abstract
Direct and indirect antioxidant activities of rosmarinic acid (RA) based on HOO˙/CH3OO˙ radical scavenging and Fe(iii)/Fe(ii) ion chelation were theoretically studied using density functional theory at the M05-2X/6-311++G(2df,2p) level of theory. First, four antioxidant mechanisms including hydrogen atom transfer (HAT), radical adduct formation (RAF), proton loss (PL) and single electron transfer (SET) were investigated in water and pentyl ethanoate (PEA) phases. Regarding the free radical scavenging mechanism, HAT plays a decisive role with overall rate coefficients of 1.84 × 103 M−1 s−1 (HOO˙) and 4.49 × 103 M−1 s−1 (CH3OO˙) in water. In contrast to PL, RAF and especially SET processes, the HAT reaction in PEA is slightly more favorable than that in water. Second, the [Fe(iii)(H2O)6]3+ and [Fe(ii)(H2O)6]2+ ion chelating processes in an aqueous phase are both favorable and spontaneous especially at the O5, site-1, and site-2 positions with large negative ΔrG0 values and great formation constant Kf. Finally, the pro-oxidant risk of RA− was also considered via the Fe(iii)-to-Fe(ii) complex reduction process, which may initiate Fenton-like reactions forming reactive HO˙ radicals. As a result, RA− does not enhance the reduction process when ascorbate anions are present as reducing agents, whereas the pro-oxidant risk becomes remarkable when superoxide anions are found. The results encourage further attempts to verify the speculation using more powerful research implementations of the antioxidant activities of rosmarinic acid in relationship with its possible pro-oxidant risks. Direct and indirect antioxidant activities of rosmarinic acid (RA) based on HOO˙/CH3OO˙ radical scavenging and Fe(iii)/Fe(ii) ion chelation were theoretically studied using density functional theory at the M05-2X/6-311++G(2df,2p) level of theory.![]()
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Duong Tuan Quang
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Dorra Khiri
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Sonia Taamalli
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Florent Louis
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam .,Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
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Malacaria L, Bruno R, Corrente GA, Armentano D, Furia E, Beneduci A. Experimental insights on the coordination modes of coumarin-3-carboxilic acid towards Cr(III)-, Co(II)-, Ni(II)-, Cu(II)- and Zn(II): A detailed potentiometric and spectroscopic investigation in aqueous media. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Modeling the Solubility of Phenolic Acids in Aqueous Media at 37 °C. Molecules 2021; 26:molecules26216500. [PMID: 34770909 PMCID: PMC8587167 DOI: 10.3390/molecules26216500] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 12/26/2022] Open
Abstract
In this work, the solubility of vanillic, gallic, syringic, p-coumaric, ferulic and caffeic acids was determined at 37 °C under different conditions, namely pure water and two different ionic media, NaCl(aq) and NaClO4(aq), at different ionic strengths (i.e., 0.16, 0.50, 1.0, 2.0 and 3.0 M). The solubility in water of all the acids was found to be higher than that in both of the ionic media. Moreover, the solubility of hydroxycinnamic acids was lower than that of hydroxybenzoic acids. The activity coefficients of neutral species were calculated from these data; this knowledge is necessary when modeling the dependence of equilibrium constants on the ionic strength. Results obtained in this work can be useful for further studies regarding complex formation equilibria between these ligands and bioavailable metal cations.
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Roy S, Das S, Ray A, Parui PP. Fluorometric trace methanol detection in ethanol and isopropanol in a water medium for application in alcoholic beverages and hand sanitizers. RSC Adv 2021; 11:30093-30101. [PMID: 35480280 PMCID: PMC9040838 DOI: 10.1039/d1ra05201b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/25/2021] [Indexed: 12/29/2022] Open
Abstract
Detection of methanol (MeOH) in an ethanol (EtOH)/isopropanol (iPrOH) medium containing water is crucial to recognize MeOH poisoning in alcoholic beverages and hand sanitizers. Although chemical sensing methods are very sensitive and easy to perform, the chemical similarities between the alcohols make MeOH detection very challenging particularly in the presence of water. Herein, the fluorometric detection of a trace amount of MeOH in EtOH/iPrOH in the presence of water using alcohol coordinated Al(iii)-complexes of an aldehydic phenol ligand containing a dangling pyrazole unit is described. The presence of MeOH in the EtOH/iPrOH causes a change of the complex geometry from tetrahedral (Td) to octahedral (Oh) due to the replacement of the coordinated EtOH/iPrOH by MeOH molecules. The Td-complex exhibited fluorescence but the Oh-species did not, because of the intramolecular photo-induced electron transfer (PET). By interacting the Oh species with water, its one MeOH coordination is replaced by a water molecule followed by the proton transfer from the water to pyrazole-N which generates strong fluorescence by inhibiting the PET. In contrast, the water interaction dissociates the Td-complex to exhibit fluorescence quenching. The water induced reversal of the fluorescence response from the decrease to increase between the absence and presence of MeOH is utilized to detect MeOH in an EtOH/iPrOH medium containing water with a sensitivity of ∼0.03–0.06% (v/v). The presence of water effected the MeOH detection and allows the estimation of the MeOH contamination in alcoholic beverages and hand sanitizers containing large amounts of water. Detection of MeOH in EtOH/iPrOH and commercial samples based on water induced reversal of fluorescence response from the decrease to increase between the absence and presence of MeOH.![]()
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Affiliation(s)
- Snigdha Roy
- Department of Chemistry, Jadavpur University Kolkata 700032 India +91-33-24146223 +91-9433490492
| | - Sanju Das
- Department of Chemistry, Maulana Azad College Kolkata 700013 India
| | - Ambarish Ray
- Department of Chemistry, Barasat Govt. College Kolkata 700124 India +91-9836650180
| | - Partha Pratim Parui
- Department of Chemistry, Jadavpur University Kolkata 700032 India +91-33-24146223 +91-9433490492
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Gromak NA, Kolokolov FA, Dotsenko VV, Aksenov NA, Aksenova IV. Synthesis and Luminescent Properties of Eu3+ and Tb3+ Complexes with Coumarin-3-carboxylic Acids. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221040174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Thermodynamic Study on the Dissociation and Complexation of Coumarinic Acid with Neodymium(III) and Dioxouranium(VI) in Aqueous Media. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11104475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In the frame of a systematic study on the sequestering ability of natural antioxidants towards metal cations, the complexation of coumarin-3-carboxilic acid (HCCA) with neodymium(III) and dioxouranium(VI) (uranyl, UO22+), and overall stability constants of the resulting complexes, were evaluated from the pH-potentiometric titration data at 37 °C and in an aqueous solution (i.e., 0.16 mol/L NaClO4). The graphic representation of the complex’s concentration curves is given by the distribution diagrams, which provide a depiction of all the species present in the solution in the selected pH ranges. The protonation constant of HCCA was also determined to evaluate the competition of the ligand for the metal cations and H+. The ligand-to-metal concentration ratio was varied between 1 and 10, and the hydrogen ion concentration was decreased stepwise until the incipient precipitation of a basic salt of the metal, which occurred at different values depending on the specific metal cation and the ligand to metal ratio. Speciation profiles obtained by potentiometric titrations and supported by UV-Vis data show that a complexation occurs at a ligand-to-Nd(III) and to –UO22+ ratio of 1:1 and 2:1, with different degrees of deprotonation: Nd(OH)(CCA)+, UO2(OH)(CCA), UO2(OH)2(CCA)−, and Nd(OH)(CCA)2, UO2(CCA)2 and (UO2)2(OH)2(CCA)2.
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Malacaria L, Corrente GA, Beneduci A, Furia E, Marino T, Mazzone G. A Review on Coordination Properties of Al(III) and Fe(III) toward Natural Antioxidant Molecules: Experimental and Theoretical Insights. Molecules 2021; 26:molecules26092603. [PMID: 33946938 PMCID: PMC8124610 DOI: 10.3390/molecules26092603] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/24/2022] Open
Abstract
This review focuses on the ability of some natural antioxidant molecules (i.e., hydroxycinnamic acids, coumarin-3-carboxylic acid, quercetin, luteolin and curcumin) to form Al(III)- and Fe(III)-complexes with the aim of evaluating the coordination properties from a combined experimental and theoretical point of view. Despite the contributions of previous studies on the chemical properties and biological activity of these metal complexes involving such natural antioxidants, further detailed relationships between the structure and properties are still required. In this context, the investigation on the coordination properties of Al(III) and Fe(III) toward these natural antioxidant molecules might deserve high interest to design water soluble molecule-based metal carriers that can improve the metal’s intake and/or its removal in living organisms.
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Corrente GA, Malacaria L, Beneduci A, Furia E, Marino T, Mazzone G. Experimental and theoretical study on the coordination properties of quercetin towards aluminum(III), iron(III) and copper(II) in aqueous solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Wang Q, Zhao L, Zhao H, Liu X, Gao L, Cheng N, Cao W. Complexation of luteolin with lead (II): Spectroscopy characterization and theoretical researches. J Inorg Biochem 2019; 193:25-30. [PMID: 30669063 DOI: 10.1016/j.jinorgbio.2019.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 11/30/2022]
Abstract
The interactions of (CH3COO)2Pb·3H2O (lead acetate trihydrate) with luteolin, 5,7,3',4'-tetrahydroxyflavone, were investigated in methanol solution. The spectroscopy (UV-Vis, FT-IR, HPLC-MS, 1H NMR) and elemental analysis were adopted to assess the interaction of luteolin and Pb(II). The results show that luteolin reacts with Pb(II) through the chelating sites of 4‑carbonyl and 5-hydroxy in two luteolin molecules. The structures, energies, CDA (charge decomposition analysis) and orbitals analysis of the ligand and complex have been analyzed according to quantum-chemical calculation, which is further proofed that luteolin molecule can effectively chelate Pb(II) by 5-hydroxyl-4-oxo chelating site. It is speculated that luteolin has a high potential of becoming a health care product to eliminate lead cation in the future.
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Affiliation(s)
- Qian Wang
- School of Chemical Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China
| | - Lingling Zhao
- School of Chemical Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China
| | - Haoan Zhao
- School of Chemical Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China
| | - Xinyan Liu
- School of Chemical Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China
| | - Liguo Gao
- College of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China
| | - Ni Cheng
- School of Food Science and Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China; Bee Product Research Center of Shaanxi Province, Xi'an 710065, China
| | - Wei Cao
- School of Food Science and Engineering, Northwest University, 229 North TaiBai Road, Xi'an 710069, China; Bee Product Research Center of Shaanxi Province, Xi'an 710065, China.
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