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Duraiyarasu M, Kumaran SS, Mayilmurugan R. Alkyl Chain Appended Fe(III) Catecholate Complex as a Dual-Modal T1 MRI-NIR Fluorescence Imaging Agent via Second Sphere Water Interactions. ACS Biomater Sci Eng 2023. [PMID: 37141045 DOI: 10.1021/acsbiomaterials.3c00203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The C12-alkyl chain-conjugated Fe(III) catecholate complex [Fe(C12CAT)3]3-, Fe(C12CAT)3 [C12CAT = N-(3,4-dihydroxyphenethyl)dodecanamide], was synthesized and characterized, reported as a dual-modal T1-MRI and an optical imaging probe. The DFT-optimized structure of Fe(C12CAT)3 reveals a distorted octahedral coordination geometry around the high spin Fe(III) center. The formation constant (-log K) of Fe(C12CAT)3 was calculated as 45.4. The complex exhibited r1-relaxivity values of 2.31 ± 0.12 and 1.52 ± 0.06 mM-1 s-1 at 25 and 37 °C, respectively, on 1.41 T at pH 7.3 via second-sphere water interactions. The interaction of Fe(C12CAT)3 with human serum albumin showed concomitant enhancement of r1-relaxivity to 6.44 ± 0.15 mM-1 s-1. The MR phantom images are significantly brighter and directly correlate to the concentration of Fe(C12CAT)3. Adding an external fluorescent marker IR780 dye to Fe(C12CAT)3 leads to the formation of self-assembly by C12-alkyl chains. It resulted in the fluorescence quenching of the dye, and its critical aggregation concentration was calculated as 70 μM. The aggregated matrix of Fe(C12CAT)3 and IR780 dye is spherical, with an average hydrodynamic diameter of 189.5 nm. This self-assembled supramolecular system is found to be non-fluorescent and was "turn-on" under acidic pH via dissociation of aggregates. The r1-relaxivity is found to be unchanged during the matrix aggregation and disaggregation. The probe showed MRI ON and fluorescent OFF under physiological conditions and MRI ON and fluorescent ON under acidic pH. The cell viability experiments showed that the cells are 80% viable at 1 mM probe concentration. Fluorescence experiments and MR phantom images showed that Fe(C12CAT)3 is a potential dual model imaging probe to visualize the acidic pH environment of the cells.
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Affiliation(s)
- Maheshwaran Duraiyarasu
- Department of Chemistry, and Department of Bioscience & Biomedical Engineering, Indian Institute of Technology Bhilai, Raipur, Chattisgarh 492015, India
| | - S Senthil Kumaran
- Department of NMR, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029, India
| | - Ramasamy Mayilmurugan
- Department of Chemistry, and Department of Bioscience & Biomedical Engineering, Indian Institute of Technology Bhilai, Raipur, Chattisgarh 492015, India
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Biological Inspirations: Iron Complexes Mimicking the Catechol Dioxygenases. MATERIALS 2021; 14:ma14123250. [PMID: 34204660 PMCID: PMC8231159 DOI: 10.3390/ma14123250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 11/18/2022]
Abstract
Within the broad group of Fe non-heme oxidases, our attention was focused on the catechol 1,2- and 2,3-dioxygenases, which catalyze the oxidative cleavage of aromatic rings. A large group of Fe complexes with N/O ligands, ranging from N3 to N2O2S, was developed to mimic the activity of these enzymes. The Fe complexes discussed in this work can mimic the intradiol/extradiol catechol dioxygenase reaction mechanism. Electronic effects of the substituents in the ligand affect the Lewis acidity of the Fe center, increasing the ability to activate dioxygen and enhancing the catalytic activity of the discussed biomimetic complexes. The ligand architecture, the geometric isomers of the complexes, and the substituent steric effects significantly affect the ability to bind the substrate in a monodentate and bidentate manner. The substrate binding mode determines the preferred mechanism and, consequently, the main conversion products. The preferred mechanism of action can also be affected by the solvents and their ability to form the stable complexes with the Fe center. The electrostatic interactions of micellar media, similar to SDS, also control the intradiol/extradiol mechanisms of the catechol conversion by discussed biomimetics.
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Sundaram GA, Vaithinathan K, Anbalagan K. New monomeric mixed-ligand complex of iron(III)-3-chloropyridine: Synthesis, structure, luminescence, electrochemical and magnetic properties. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Pour YS, Safaei E, Wojtczak A, Jagličić Z. Valence tautomerism in catecholato cobalt Bis(phenolate) diamine complexes as models for Enzyme–substrate adducts of catechol dioxygenases. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Maheshwaran D, Nagendraraj T, Sekar Balaji T, Kumaresan G, Senthil Kumaran S, Mayilmurugan R. Smart dual T1 MRI-optical imaging agent based on a rhodamine appended Fe(iii)-catecholate complex. Dalton Trans 2020; 49:14680-14689. [DOI: 10.1039/d0dt02364g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The high spin Fe(iii) complex Fe(RhoCat)3 is reported as a smart dual-modal T1 MRI-optical imaging probe to visualize the NO molecule and an acidic pH environment.
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Affiliation(s)
- Duraiyarasu Maheshwaran
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625 021
- India
| | - Thavasilingam Nagendraraj
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625 021
- India
| | - T. Sekar Balaji
- School of Biological Sciences
- Madurai Kamaraj University
- Madurai 625 021
- India
| | - Ganesan Kumaresan
- School of Biological Sciences
- Madurai Kamaraj University
- Madurai 625 021
- India
| | - S. Senthil Kumaran
- Department of NMR
- All India Institute of Medical Sciences
- New Delhi 110 029
- India
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625 021
- India
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Kovalska N, Pfaffeneder-Kmen M, Tsyntsaru N, Mann R, Henrikas Cesiulis, Hansal W, Kautek W. The role of glycine in the iron-phosphorous alloy electrodeposition. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.03.203] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ambrose K, Robertson KN, Kozak CM. Cobalt amino-bis(phenolate) complexes for coupling and copolymerization of epoxides with carbon dioxide. Dalton Trans 2019; 48:6248-6260. [DOI: 10.1039/c9dt00996e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Electron-withdrawing groups on phenolate donors enhance polycarbonate production from CO2 and cyclohexene oxide by Co(ii) amino-bis(phenolate) complexes.
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Affiliation(s)
- Kenson Ambrose
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada A1B 3X7
| | | | - Christopher M. Kozak
- Department of Chemistry
- Memorial University of Newfoundland
- St. John's
- Canada A1B 3X7
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Arslan M, Kiskan B, Yagci Y. Benzoxazine-Based Thermoset with Autonomous Self-Healing and Shape Recovery. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02137] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mustafa Arslan
- Faculty of Science and Letters, Department of Chemistry, Kirklareli University, 39000 Kirklareli, Turkey
| | - Baris Kiskan
- Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
| | - Yusuf Yagci
- Faculty of Science and Letters, Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
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Saberikia I, Safaei E, Karimi B, Lee YIII. Oxygenation of sulfides catalysed by SBA-15-immobilized molybdenum(VI) complex of a bis(phenol) diamine ligand using aqueous hydrogen peroxide as a green oxidant. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Iraj Saberikia
- Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Elham Safaei
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Babak Karimi
- Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Yong-III Lee
- Department of Chemistry; Changwon National University; Changwon 641-773 South Korea
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Karimpour T, Safaei E, Karimi B, Lee YI. Iron(III) Amine Bis(phenolate) Complex Immobilized on Silica-Coated Magnetic Nanoparticles: A Highly Efficient Catalyst for the Oxidation of Alcohols and Sulfides. ChemCatChem 2017. [DOI: 10.1002/cctc.201701217] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Touraj Karimpour
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); P.O. Box 45137-66731, Gava Zang Zanjan Iran
| | - Elham Safaei
- Department of Chemistry; College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Babak Karimi
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); P.O. Box 45137-66731, Gava Zang Zanjan Iran
| | - Yong-Ill Lee
- Department of Chemistry; Changwon National University; Changwon 641-773 South Korea
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Saberikia I, Safaei E, Karimi B, Lee YI. A Novel Copper Complex of Proline-Based Mono(phenol) Amine Ligand (Hlpro) Immobilized in SBA-15 as a Model Catalyst of Galactose Oxidase. ChemistrySelect 2017. [DOI: 10.1002/slct.201701535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Iraj Saberikia
- Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Elham Safaei
- Department of Chemistry; College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Babak Karimi
- Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Yong-Ill Lee
- Department of Chemistry; Changwon National University; Changwon 641-773 South Korea
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Yin W, Huang L, Pedersen EB, Frandsen C, Hansen HCB. Glycine buffered synthesis of layered iron(II)-iron(III) hydroxides (green rusts). J Colloid Interface Sci 2017; 497:429-438. [DOI: 10.1016/j.jcis.2016.11.076] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/08/2016] [Accepted: 11/21/2016] [Indexed: 11/26/2022]
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Yin W, Strobel BW, B Hansen HC. Amino Acid-Assisted Dehalogenation of Carbon Tetrachloride by Green Rust: Inhibition of Chloroform Production. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3445-3452. [PMID: 28244752 DOI: 10.1021/acs.est.6b06244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Layered FeII-FeIII hydroxides (green rusts, GRs) are promising reactants for reductive dechlorination of chlorinated solvents due to high reaction rates and the opportunity to inject reactive slurries of the compounds into contaminant plumes. However, it is necessary to develop strategies that reduce the formation of toxic byproducts such as chloroform (CF). In this study, carbon tetrachloride (CT) dehalogenation by the chloride form of GR (GRCl) was tested in the presence of glycine (GLY) and other selected amino acids. GLY, alanine (ALA), and serine (SER) all resulted in remarkable suppression of CF formation with only ∼10% of CF recovery while sarcosine (SAR) showed insignificant effects. For two nonamino acid buffers, TRIS had little effect while HEPES resulted in a 40 times lower rate constant compared to experiments in which no buffer was added. The FeII complexing properties of the amino acids and buffers caused variable extents of GRCl dissolution which was linearly correlated with CF suppression and dehalogenation rate. We hypothesize that the CF suppression seen for amino acids is caused by stabilization of carbene intermediates via the carbonyl group. Different effects on CF suppression and CT dehalogenation rate were expected because of the different structural and chemical properties of the amino acids.
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Affiliation(s)
- Weizhao Yin
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen , Thorvaldsensvej 40, Frederiksberg C, DK-1871, Denmark
| | - Bjarne W Strobel
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen , Thorvaldsensvej 40, Frederiksberg C, DK-1871, Denmark
| | - Hans Christian B Hansen
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen , Thorvaldsensvej 40, Frederiksberg C, DK-1871, Denmark
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Safaei E, Hajikhanmirzaei L, Alavi S, Lee YI, Wojtczak A, Jagličić Z. Tetrabromocatecholato Mn(III) complexes of bis(phenol) diamine ligands as models for enzyme–substrate adducts of catechol dioxygenases. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.07.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kuźnik N, Chmielniak U. Studies on the redox activity of iron N,O-complexes: Potential T 1-contrast agents. Redox Rep 2016; 21:37-44. [PMID: 26023764 DOI: 10.1179/1351000215y.0000000017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
OBJECTIVES The goal of this study was to determine the redox activity of iron (ethylenebis[2-(o-hydroxyphenyl)glycine]) (EHPG) and (ethylenebis[2-(o-hydroxybenzyl)glycine]) (EHBG) (N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid) derivative complexes and of some N,O-salan complexes of iron. The hexadentate chelate (EHPG and EHBG) ligands varied in their substituents (polar OMe, NHAc, or lipophilic Ph), while the latter had different charge and lipophilicity. The low redox activity of these complexes is important in their potential applications as magnetic resonance imaging contrast agents. METHODS Redox activity was assessed in the entire Haber-Weiss cycle and separately in the Fenton reaction. The spin-trapping method with 5,5-dimethyl-1-pyrroline-N-oxide monitored in electron paramagnetic resonance was used. The standard Mn marker was applied as a reference for quantitative analysis. Additionally, ascorbate oxidation was analyzed with UV-Vis spectrophotometry. RESULTS Both the Haber-Weiss cycle and in particular the Fenton reaction showed low redox activity of the studied complexes, which did not exceed 30% of [Fe(EDTA)]- or FeCl3 activity. The N,O-salan complexes expressed even lower activity, i.e. 10-20% activity of [Fe(EDTA)]-. DISCUSSION For the EHPG and EHBG complexes, it is likely that hydrophobicity and the possibility of H-bond formation play a major role in the resulting redox effects. For this reason, chelates equipped with phenyl groups in the majority belong to less redox-active complexes. For N,O-salan complexes, activity is not correlated with the charge of the coordination sphere, but again, the highly hydrophobic character of the groups and the non-pendant substituents capable of H-bonding that are present in these ligands limit the affinity of hydrophilic species.
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Affiliation(s)
- Nikodem Kuźnik
- a Faculty of Chemistry , Silesian University of Technology , M. Strzody 9, 44-100 Gliwice , Poland
| | - Urszula Chmielniak
- a Faculty of Chemistry , Silesian University of Technology , M. Strzody 9, 44-100 Gliwice , Poland
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Safaei E, Heidari S, Wojtczak A, Cotič P, Kozakiewicz A. 4-Nitrocatecholato iron(III) complexes of 2-aminomethyl pyridine-based bis(phenol) amine as structural models for catechol-bound 3,4-PCD. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Poureskandari M, Safaei E, Maryam Sajjadi S, Karimpour T, Jaglicic Z, Lee YI. Iron(III) complex of N-phenylethylenediamine derivative of amine bis(phenol) ligand as model for catechol dioxygenase: Synthesis, characterization and complexation studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Models for enzyme–substrate adduct of non-heme iron-containing enzymes, synthesis and characterization. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.06.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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