1
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Zhang H, Tian X, Zhang J, Ai HW. Engineering and Characterization of 3-Aminotyrosine-Derived Red Fluorescent Variants of Circularly Permutated Green Fluorescent Protein. BIOSENSORS 2024; 14:54. [PMID: 38275307 PMCID: PMC10813706 DOI: 10.3390/bios14010054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/08/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
Introducing 3-aminotyrosine (aY), a noncanonical amino acid (ncAA), into green fluorescent protein (GFP)-like chromophores shows promise for achieving red-shifted fluorescence. However, inconsistent results, including undesired green fluorescent species, hinder the effectiveness of this approach. In this study, we optimized expression conditions for an aY-derived cpGFP (aY-cpGFP). Key factors like rich culture media and oxygen restriction pre- and post-induction enabled high-yield, high-purity production of the red-shifted protein. We also engineered two variants of aY-cpGFP with enhanced brightness by mutating a few amino acid residues surrounding the chromophore. We further investigated the sensitivity of the aY-derived protein to metal ions, reactive oxygen species (ROS), and reactive nitrogen species (RNS). Incorporating aY into cpGFP had minimal impact on metal ion reactivity but increased the response to RNS. Expanding on these findings, we examined aY-cpGFP expression in mammalian cells and found that reductants in the culture media significantly increased the red-emitting product. Our study indicates that optimizing expression conditions to promote a reduced cellular state proved effective in producing the desired red-emitting product in both E. coli and mammalian cells, while targeted mutagenesis-based protein engineering can further enhance brightness and increase method robustness.
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Affiliation(s)
- Hao Zhang
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA; (H.Z.); (X.T.); (J.Z.)
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
| | - Xiaodong Tian
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA; (H.Z.); (X.T.); (J.Z.)
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA
| | - Jing Zhang
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA; (H.Z.); (X.T.); (J.Z.)
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA
| | - Hui-wang Ai
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, VA 22908, USA; (H.Z.); (X.T.); (J.Z.)
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
- Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA
- The UVA Comprehensive Cancer Center, University of Virginia, Charlottesville, VA 22908, USA
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2
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Palaniappan M, Selvaraj D, Kandasamy S, Kahng YH, Narayanan M, Rajendran R, Rangappan R. Architectural MCM 41 was anchored to the Schiff base Co(II) complex to enhance methylene blue dye degradation and mimic activity. ENVIRONMENTAL RESEARCH 2022; 215:114325. [PMID: 36154860 DOI: 10.1016/j.envres.2022.114325] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 08/21/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
A sequence of Schiff base Cobalt (II) Mobile Composite Matter 41 heterojunction (SBCo(II)-MCM 41) was prepared by post-synthetic protocols. Various characterization techniques were used to characterize the above samples and MCM 41: Morphology, functional groups, optical properties, crystalline nature, pore diameter, and binding energy by scanning electron microscope (SEM), High-resolution transition electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FTIR), Ultra Violet-Visible Spectroscopy (UV), X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET) and X-ray Photoelectron Spectroscopy (XPS). After the encapsulation of SBCo(II) on the MCM 41, the intensity in the 100-plane in powder x-ray diffraction (XRD) decreased significantly; moreover, the light absorption behavior in UV analysis was improved. The change in the surface area and the decrease in the pore diameter of the sample were also demonstrated by the BET study. The XPS results confirmed the presence of Si, O, C, N, and Co in the SBCo(II)-MCM 41 complex. The photocatalytic performance of MCM 41 and SBCo(II)-MCM 41 materials tested by the degradation of methylene blue dye (MBD) shows that MCM 41 immobilization with SBCo(II)complex is rapidly degraded under natural sunlight irradiation. The optimized 10 mg SBCo(II)-MCM 41 catalyst concentrations showed effective enhancement with the highest efficiency of 98% achieved within 2 h compared to the other two SBCo(II)-MCM 41 concentrations. Moreover, the catalytic efficiency of SBCo(II)-MCM 41 showed a biomimetic reaction without using an oxidant, which exposed it as an effective catalyst for amine to imine conversion; it was useful in the medical field for enzymes with structural assembly.
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Affiliation(s)
- Manikandan Palaniappan
- Department of Chemistry, Bioinorganic Lab, Science Block-1, Periyar University, Salem 636 011, Tamil Nadu, India
| | - David Selvaraj
- Department of Chemistry, Bioinorganic Lab, Science Block-1, Periyar University, Salem 636 011, Tamil Nadu, India; Department of Physics Education, Chonnam National University, Gwangju 500-757, Republic of Korea.
| | - Sabariswaran Kandasamy
- Water-Energy Nexus Laboratory, Department of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea
| | - Yung Ho Kahng
- Department of Physics Education, Chonnam National University, Gwangju 500-757, Republic of Korea.
| | - Mathiyazhagan Narayanan
- Division of Research and Innovations, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Science, Chennai, 602 105, Tamil Nadu, India
| | | | - Rajavel Rangappan
- Department of Chemistry, Bioinorganic Lab, Science Block-1, Periyar University, Salem 636 011, Tamil Nadu, India.
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3
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Advances of Cobalt Phthalocyanine in Electrocatalytic CO2 Reduction to CO: a Mini Review. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00766-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
The first remarkable property associated to metallophthalocyanines (MPcs) was their chemical “inertness”, which made and make them very attractive as stable and durable industrial dyes. Nevertheless, their rich redox chemistry was also explored in the last decades, making available a solid and detailed knowledge background for further studies on the suitability of MPcs as redox catalysts. An overlook of MPcs and their catalytic activity with dioxygen as oxidants will be discussed here with a special emphasis on the last decade. The mini-review begins with a short introduction to phthalocyanines, from their structure to their main features, going then through the redox chemistry of metallophthalocyanines and their catalytic activity in aerobic oxidation reactions. The most significant systems described in the literature comprise the oxidation of organosulfur compounds such as thiols and thiophenes, the functionalization of alkyl arenes, alcohols, olefins, among other substrates.
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5
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Sohtun WP, Muthuramalingam S, Sankaralingam M, Velusamy M, Mayilmurugan R. Copper(II) complexes of tripodal ligand scaffold (N 3O) as functional models for phenoxazinone synthase. J Inorg Biochem 2020; 216:111313. [PMID: 33277049 DOI: 10.1016/j.jinorgbio.2020.111313] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/12/2020] [Accepted: 11/12/2020] [Indexed: 11/30/2022]
Abstract
The copper(II) complexes [Cu(L)NO3] (1-9) of newer N3O ligands (L1-L9) have been synthesized and characterized. The molecular structure of 1, 4, and 7 exhibited nearly a perfect square pyramidal geometry (τ, 0.04-0.11). The Cu-OPhenolate bonds (~ 1.91 Å) are shorter than the Cu-N bonds (~ 2.06 Å) due to the stronger coordination of anionic phenolate oxygen. The Cu(II)/Cu(I) redox potentials of 1-9 appeared around -0.102 to -0.428 V versus Ag/Ag+ in water. The electronic spectra of the complexes showed the d-d transitions around 643-735 nm and axial EPR parameter (g||, 2.243-2.270; A||, 164-179 × 10-4 cm-1) that corresponds to square pyramidal geometry. The bonding parameters α2, 0.760-0.825; β2, 0.761-0.994; γ2, 0.504-0.856 and K||, 0.698-0.954 and K⊥, 0.383-0.820 calculated from EPR spectra and energies of d-d transitions. The complexes catalyzed the conversion of substrate 2-aminophenol into 2-aminophenoxazine-3-one using molecular oxygen in the water and exhibited the yields of 41-61%. The formation of the product is accomplished by the appearance of a new absorption band at 430 nm and the rates of formation were calculated as 6.98-15.65 × 10-3 s-1 in water. The reaction follows Michaelis-Menten enzymatic reaction kinetics with turnover numbers (kcat) 9.11 × 105 h-1 for 1 and 4.66 × 105 h-1 for 9 in water. The spectral, redox and kinetic studies were performed in water to mimic the enzymatic oxidation reaction conditions.
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Affiliation(s)
- Winaki P Sohtun
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India
| | - Sethuraman Muthuramalingam
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Muniyandi Sankaralingam
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India.
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Schandry N, Becker C. Allelopathic Plants: Models for Studying Plant-Interkingdom Interactions. TRENDS IN PLANT SCIENCE 2020; 25:176-185. [PMID: 31837955 DOI: 10.1016/j.tplants.2019.11.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/29/2019] [Accepted: 11/18/2019] [Indexed: 05/24/2023]
Abstract
Allelopathy is a biochemical interaction between plants in which a donor plant releases secondary metabolites, allelochemicals, that are detrimental to the growth of its neighbours. Traditionally considered as bilateral interactions between two plants, allelopathy has recently emerged as a cross-kingdom process that can influence and be modulated by the other organisms in the plant's environment. Here, we review the current knowledge on plant-interkingdom interactions, with a particular focus on benzoxazinoids. We highlight how allelochemical-producing plants influence not only their plant neighbours but also insects, fungi, and bacteria that live on or around them. We discuss challenges that need to be overcome to study chemical plant-interkingdom interactions, and we propose experimental approaches to address how biotic and chemical processes impact plant health.
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Affiliation(s)
- Niklas Schandry
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria.
| | - Claude Becker
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna BioCenter (VBC), Dr. Bohr-Gasse 3, 1030 Vienna, Austria; Institute of Genetics, Faculty of Biology, Biocenter Martinsried, LMU Munich, 82152 Martinsried-Planegg, Germany.
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7
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Dutta S, Mayans J, Ghosh A. Facile synthesis of a new Cu(ii) complex with an unsymmetrical ligand and its use as an O 3 donor metalloligand in the synthesis of Cu(ii)-Mn(ii) complexes: structures, magnetic properties, and catalytic oxidase activities. Dalton Trans 2020; 49:1276-1291. [PMID: 31909778 DOI: 10.1039/c9dt04315b] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new, facile Cu(ii) template method has been employed for the unsymmetrical dicondensation of 1,2-ethylenediamine with salicylaldehyde and o-vanillin. The mononuclear complex, [CuL] (1), thus obtained, has been used as an O3 donor metalloligand for the synthesis of four new Cu(ii)-Mn(ii) complexes, [(CuL)MnCl2] (2), [(CuL)Mn(NO3)2(CH3OH)]n (3), {[(CuL)Mn(benz)(H2O)]2·(CuL)2(ClO4)2} (4) and [(CuL)Mn(benz)Cl]2 (5) (where benz = benzoate). Single-crystal structural analyses reveal that 2 is a dinuclear complex while complex 3 is polymeric with a repeating dinuclear [(CuL)Mn(NO3)2(CH3OH)] unit, linked via the nitrate ion. Both 4 and 5 are discrete tetranuclear complexes, where the dinuclear units [(CuL)Mn(benz)(H2O)] and [(CuL)Mn(benz)Cl] are connected by double benzoate and double chloride bridges, respectively. In complex 4, two monomeric [CuL] units are cocrystallized with the tetranuclear complex. An important difference in the structure of 4 from the other three complexes is that one solvent water molecule is coordinated to each Mn(ii) ion, which makes complex 4 catalytically very active towards mimicking catecholase and phenoxazinone synthase-like oxidation reactions. The turnover numbers (kcat) for the aerial oxidation of 3,5-di-tert-butylcatechol and o-aminophenol are 399 h-1 and 230 h-1, respectively. The evidence of the intermediate species in the mass spectra indicates possible heterometallic cooperation where the Mn(ii) center helps in substrate binding and Cu(ii) participates in the oxidation reactions with molecular oxygen. Cyclic voltammetry measurements suggest the reduction of Cu(ii) to Cu(i) during the catalytic process. Temperature-dependent dc molar magnetic susceptibility measurements reveal that complexes 2-5 are antiferromagnetically coupled with the exchange coupling constants (J) of J = -13.5 cm-1 and J = -13.5 cm-1 for 2 and 3, respectively, J1 = -12.6 cm-1 and J2 = -1.20 cm-1 for complex 4 and J1 = -13.24 cm-1 and J2 = 0.36 cm-1 for complex 5 as is expected from the Cu-O-Mn bridging angles.
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Affiliation(s)
- Sabarni Dutta
- Department of Chemistry, University College of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, India.
| | - Júlia Mayans
- Departament de Química Inorgànica I Orgànica, Secció Inorgànica and Institut de Nanosciència I Nanotecnologia (IN2UB), Martíi Franqués 1-11, 08028, Barcelona, Spain
| | - Ashutosh Ghosh
- Department of Chemistry, University College of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, India.
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Mandal A, Dasgupta S, Adhikary A, Samanta D, Zangrando E, Das D. Synthesis of Mn3O4 nanozymes from structurally characterized phenoxazinone synthase models based on manganese(iii) Schiff base complexes. Dalton Trans 2020; 49:5999-6011. [DOI: 10.1039/d0dt00355g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mn3O4 nanozymes of phenoxazinone synthase have been prepared from the manganese(iii) based mimicking models of the enzyme.
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Affiliation(s)
- Arnab Mandal
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | | | - Amit Adhikary
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Debabrata Samanta
- Department of Chemistry
- Indian Institute of Technology
- Kanpur-208016
- India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
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9
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Jana NC, Brandão P, Panja A. The first report of a tetra-azide bound mononuclear cobalt(iii) complex and its comparative biomimetic catalytic activity with tri-azide bound cobalt(iii) compounds. NEW J CHEM 2020. [DOI: 10.1039/d0nj02339f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Three new azide-bound cobalt(iii) complexes derived from three different triamines with extensive hydrogen bonded supramolecular chain structures and the role of their structural factors in oxidative coupling of o-aminophenols have been reported.
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Affiliation(s)
- Narayan Ch. Jana
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
| | - Paula Brandão
- Department of Chemistry
- CICECO-Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Anangamohan Panja
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
- Department of Chemistry
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Li D, Ge S, Xiang Y, Gong J, Liu C, Sun G, Xu J, Fa W, Ma J. A simple and facile bioinspired catalytic strategy to decolorize dye wastewater by using metal octacarboxyphthalocyanine particles. JOURNAL OF HAZARDOUS MATERIALS 2019; 380:120842. [PMID: 31326831 DOI: 10.1016/j.jhazmat.2019.120842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 06/25/2019] [Accepted: 06/27/2019] [Indexed: 06/10/2023]
Abstract
To explore the simple, facile, environmental friendly and low cost catalytic technique to decolorize harmful dye contaminants in solution and understand the mechanism is an interesting and practical research. In this paper, we provide a highly efficient and convenient method for fast decolorization of dyes (methylene blue and rhodamine B) in aqueous solution catalyzed by iron octacarboxyphthalocyanine (FeOCPc) or cobalt octacarboxyphthalocyanine (CoOCPc). Compared to the traditional methods, our method is very simple. The 30 mg/L methylene blue could be decolorized almost absolutely less than 30 min just by dispersing FeOCPc powders into the dye solution. The decolorization of rhodamine B at high concentration (30 mg/L) could be achieved to 100% decolorization degree less than 20 min in the presence of FeOCPc and tert-butyl hydroperoxide (BuOOH). Moreover, the ESR and HPLC-MS measurement were performed to determine the active radicals and various intermediates in decolorization processes and the possible catalytic mechanism was proposed. It is noted that both FeOCPc and CoOCPc catalysts show the different catalytic oxidation behaviors depending on the oxidant (O2 or BuOOH). Our investigation provides a novel, low cost and convenient strategy to purify the environmental pollutions.
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Affiliation(s)
- Dapeng Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China
| | - Suxiang Ge
- Institute of Surface Micro and Nano Materials, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Henan Joint International Research Laboratory of Nanomaterials for Energy and Catalysis, Xuchang University, Henan, 461000, PR China.
| | - Yingcheng Xiang
- School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China; School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Henan, 450011, PR China
| | - Jingjing Gong
- School of Chemistry, The University of Edinburgh, Scotland, eh9 3fj, The United Kingdom of Great Britain and Northern Ireland, United Kingdom
| | - Chunhui Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China.
| | - Guofu Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China
| | - Jingli Xu
- School of Chemistry and Chemical Engineering, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Xuchang University, Henan, 461000, PR China
| | - Wenjun Fa
- Institute of Surface Micro and Nano Materials, Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Henan Joint International Research Laboratory of Nanomaterials for Energy and Catalysis, Xuchang University, Henan, 461000, PR China
| | - Juntao Ma
- School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Henan, 450011, PR China
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Sohtun WP, Muthuramalingam S, Velusamy M, Mayilmurugan R. New class of tridentate 3N ligands and copper(II) complexes: A model for type-2 copper site of phenoxazinone synthase. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.107608] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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A highly selective and sensitive sensor with imine and phenyl-ethynyl-phenyl units for the visual and fluorescent detection of copper in water. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111893] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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New Artificial Biomimetic Enzyme Analogues based on Iron(II/III) Schiff Base Complexes: An Effect of (Benz)imidazole Organic Moieties on Phenoxazinone Synthase and DNA Recognition. Molecules 2019; 24:molecules24173173. [PMID: 31480486 PMCID: PMC6749401 DOI: 10.3390/molecules24173173] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 02/03/2023] Open
Abstract
Elucidation of the structure and function of biomolecules provides us knowledge that can be transferred into the generation of new materials and eventually applications in e.g., catalysis or bioassays. The main problems, however, concern the complexity of the natural systems and their limited availability, which necessitates utilization of simple biomimetic analogues that are, to a certain degree, similar in terms of structure and thus behaviour. We have, therefore, devised a small library of six tridentate N-heterocyclic coordinating agents (L1-L6), which, upon complexation, form two groups of artificial, monometallic non-heme iron species. Utilization of iron(III) chloride leads to the formation of the 1:1 (Fe:Ln) 'open' complexes, whereas iron(II) trifluoromethanosulfonate allows for the synthesis of 1:2 (M:Ln) 'closed' systems. The structural differences between the individual complexes are a result of the information encoded within the metallic centre and the chosen counterion, whereas the organic scaffold influences the observed properties. Indeed, the number and nature of the external hydrogen bond donors coming from the presence of (benz)imidazole moieties in the ligand framework are responsible for the observed biological behaviour in terms of mimicking phenoxazinone synthase activity and interaction with DNA.
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Ternary complexes containing Copper(II), -Valinate and α, ά-bipyridyl or 1,10-phenanthroline: Synthesis, characterization, ligand substitution and oxidase biomimetic catalytic activity studies. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Jana NC, Patra M, Brandão P, Panja A. Synthesis, structure and diverse coordination chemistry of cobalt(III) complexes derived from a Schiff base ligand and their biomimetic catalytic oxidation of o-aminophenols. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Synthesis and structural characterization of a cobalt(III) complex with an (N,S,O) donor Schiff base ligand: Catechol oxidase and phenoxazinone synthase activities. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Sengupta S, Naath Mongal B, Das S, Panda TK, Mandal TK, Fleck M, Chattopadhyay SK, Naskar S. Mn(III) and Cu(II) complexes of 1-((3-(dimethylamino)propylimino)methyl) naphthalen-2-ol): Synthesis, characterization, catecholase and phenoxazinone synthase activity and DFT-TDDFT study. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1453065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Swaraj Sengupta
- Department of Chemistry, Birla Institute of Technology, Ranchi, India
- Department of Chemistry, Indian Institute of Engineering Science and Technology-Shibpur, Howrah, India
| | | | - Suman Das
- Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy, India
| | - Tarun K. Panda
- Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy, India
| | - Tarun K. Mandal
- Department of Biotechnology, Haldia Institute of Technology, Haldia, India
| | - Michel Fleck
- Institute for Mineralogy and Crystallography, University of Vienna, Vienna, Austria
| | - Shyamal K. Chattopadhyay
- Department of Chemistry, Indian Institute of Engineering Science and Technology-Shibpur, Howrah, India
| | - Subhendu Naskar
- Department of Chemistry, Birla Institute of Technology, Ranchi, India
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18
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Panja A, Jana NC, Brandão P. Influence of anions and solvents on distinct coordination chemistry of cobalt and effect of coordination spheres on the biomimetic oxidation of o-aminophenols. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.02.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Oxidative coupling of 2-aminophenol to 2-amino-phenoxazine-3-one catalyzed by organotin (IV)–copper (I) cyanide coordination polymers as heterogeneous catalysts. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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20
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Mahapatra P, Ghosh S, Giri S, Rane V, Kadam R, Drew MGB, Ghosh A. Subtle Structural Changes in (CuIIL)2MnII Complexes To Induce Heterometallic Cooperative Catalytic Oxidase Activities on Phenolic Substrates (H2L = Salen Type Unsymmetrical Schiff Base). Inorg Chem 2017; 56:5105-5121. [DOI: 10.1021/acs.inorgchem.7b00253] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Prithwish Mahapatra
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Soumavo Ghosh
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Sanjib Giri
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Vinayak Rane
- Radiochemistry division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
| | - Ramakant Kadam
- Radiochemistry division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
| | - Michael G. B. Drew
- School of Chemistry, The University of Reading, P.O. Box 224, Whiteknights, Reading RG6 6AD, U.K
| | - Ashutosh Ghosh
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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21
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Banerjee S, Brandão P, Bauzá A, Frontera A, Barceló-Oliver M, Panja A, Saha A. Nuclearity versus oxidation state in the catalytic efficiency of MnII/III azo Schiff base complexes: computational study on supramolecular interactions and phenoxazinone synthase-like activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj02280h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Supramolecular interactions of a mononuclear Mn(iii) and a tetranuclear Zn(ii)–Mn(ii) complexes and their comparative bio mimetic catalytic activity have been reported.
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Affiliation(s)
- Saikat Banerjee
- Department of Chemistry
- Jadavpur University
- Kolkata – 700032
- India
| | - Paula Brandão
- Departamento de Química
- CICECO
- Universidade de Aveiro
- 3810-193 Aveiro
- Portugal
| | - Antonio Bauzá
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma (Baleares)
- Spain
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma (Baleares)
- Spain
| | | | - Anangamohan Panja
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
| | - Amrita Saha
- Department of Chemistry
- Jadavpur University
- Kolkata – 700032
- India
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22
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Panja A, Jana NC, Brandão P. Influence of the first and second coordination spheres on the diverse phenoxazinone synthase activity of cobalt complexes derived from a tetradentate Schiff base ligand. NEW J CHEM 2017. [DOI: 10.1039/c7nj02015e] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cobalt complexes as functional models for phenoxazinone synthase showing the influence of both first and second order coordination spheres on the catalytic activity and important intermediates in the ESI mass spectrum providing better information on the mechanistic pathway.
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Affiliation(s)
- Anangamohan Panja
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
| | - Narayan Ch. Jana
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
| | - Paula Brandão
- Department of Chemistry
- CICECO-Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
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23
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Mahato M, Mondal D, Nayek HP. Syntheses, Structures and Phenoxazinone Synthase Activities of Two Cobalt(III) Complexes. ChemistrySelect 2016. [DOI: 10.1002/slct.201601597] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mamata Mahato
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad, 826004; Jharkhand India
| | - Dipanjan Mondal
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad, 826004; Jharkhand India
| | - Hari Pada Nayek
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad, 826004; Jharkhand India
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24
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Vashurin AS, Kuz’min IA, Kuz’micheva LA, Pukhovskaya SG, Titova YV, Titov VA, Golubchikov OA. Surfactant-modified polypropylene as a catalyst for oxidation of mercaptans. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216090358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Catechol oxidase and phenoxazinone synthase: Biomimetic functional models and mechanistic studies. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.11.002] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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26
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Abou Mehrez O, Dossier-Berne F, Legube B. Oxidation of 2-aminophenol to 2-amino-3H-phenoxazin-3-one with monochloramine in aqueous environment: A new method for APO synthesis? CHEMOSPHERE 2016; 145:464-469. [PMID: 26694797 DOI: 10.1016/j.chemosphere.2015.11.073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/08/2015] [Accepted: 11/15/2015] [Indexed: 06/05/2023]
Abstract
Reaction of 2-aminophenol (2AP) with monochloramine in aqueous solution was investigated at pH 8.5 and 25 °C, with an excess of monochloramine. 2-Amino-3H-phenoxazin-3-one (APO) was the major product formed in about 70% yield. Despite low formation yields, adsorbable organic halides (AOX) were also formed over reaction time.
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Affiliation(s)
- Odissa Abou Mehrez
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, Equipe Eaux-Géochimie Organique-Santé, Ecole Nationale Supérieure d'Ingénieurs de Poitiers, 1 Rue Marcel Doré, TSA 41105, 86073 Poitiers Cedex 9, France.
| | - Florence Dossier-Berne
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, Equipe Eaux-Géochimie Organique-Santé, Ecole Nationale Supérieure d'Ingénieurs de Poitiers, 1 Rue Marcel Doré, TSA 41105, 86073 Poitiers Cedex 9, France
| | - Bernard Legube
- Université de Poitiers, Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS UMR 7285, Equipe Eaux-Géochimie Organique-Santé, Ecole Nationale Supérieure d'Ingénieurs de Poitiers, 1 Rue Marcel Doré, TSA 41105, 86073 Poitiers Cedex 9, France
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27
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Olivares CI, Wang J, Luna CDS, Field JA, Abrell L, Sierra-Alvarez R. Continuous treatment of the insensitive munitions compound N-methyl-p-nitro aniline (MNA) in an upflow anaerobic sludge blanket (UASB) bioreactor. CHEMOSPHERE 2016; 144:1116-22. [PMID: 26454121 PMCID: PMC5605778 DOI: 10.1016/j.chemosphere.2015.09.092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 08/29/2015] [Accepted: 09/24/2015] [Indexed: 05/17/2023]
Abstract
N-methyl-p-nitroaniline (MNA) is an ingredient of insensitive munitions (IM) compounds that serves as a plasticizer and helps reduce unwanted detonations. As its use becomes widespread, MNA waste streams will be generated, necessitating viable treatment options. We studied MNA biodegradation and its inhibition potential to a representative anaerobic microbial population in wastewater treatment, methanogens. Anaerobic biodegradation and toxicity assays were performed and an up-flow anaerobic sludge blanket reactor (UASB) was operated to test continuous degradation of MNA. MNA was transformed almost stoichiometrically to N-methyl-p-phenylenediamine (MPD). MPD was not mineralized; however, it was readily autoxidized and polymerized extensively upon aeration at pH = 9. In the UASB reactor, MNA was fully degraded up to a loading rate of 297.5 μM MNA d(-1). Regarding toxicity, MNA was very inhibitory to acetoclastic methanogens (IC50 = 103 μM) whereas MPD was much less toxic, causing only 13.9% inhibition at the highest concentration tested (1025 μM). The results taken as a whole indicate that anaerobic sludge can transform MNA to MPD continuously, and that the transformation decreases the cytotoxicity of the parent pollutant. MPD can be removed through extensive polymerization. These insights could help define efficient treatment options for waste streams polluted with MNA.
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Affiliation(s)
- Christopher I Olivares
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA
| | - Junqin Wang
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA
| | - Carlos D Silva Luna
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA; Departamento de Procesos y Tecnología, División de Ciencias Naturales e Ingeniería, Universidad Autónoma Metropolitana - Unidad Cuajimalpa (UAM-C), Vasco de Quiroga 4871, Col. Santa Fe Cuajimalpa, Cuajimalpa de Morelos, C.P. 05300 México, D.F., Mexico
| | - Jim A Field
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA
| | - Leif Abrell
- Department of Chemistry & Biochemistry, University of Arizona, P.O. Box 210041, Tucson, AZ 85721-0041, USA; Department of Soil, Water & Environmental Science, University of Arizona, P.O. Box 210038, Tucson, AZ 85721-0038, USA
| | - Reyes Sierra-Alvarez
- Department of Chemical and Environmental Engineering, University of Arizona, P.O. Box 210011, Tucson, AZ 85721-0011, USA.
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28
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Dey SK, Mukherjee A. Investigation of 3d-transition metal acetates in the oxidation of substituted dioxolene and phenols. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Vashurin A, Maizlish V, Pukhovskaya S, Voronina A, Kuzmin I, Futerman N, Golubchikov O, Koifman O. Novel aqueous soluble cobalt(II) phthalocyanines of tetracarboxyl-substituted: Synthesis and catalytic activity on oxidation of sodium diethyldithiocarbamate. J PORPHYR PHTHALOCYA 2015. [DOI: 10.1142/s1088424614501028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Enhancement of the catalytic activity of phthalocyanine catalysts by immobilizing them on polymer matrix has been studied. It has been found that the immobilization of cobalt(II) phthalocyanines on polymers enhances their catalytic activity in the oxidation of sodium diethyldithiocarbamate by air oxygen under mild conditions.
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Affiliation(s)
- Artur Vashurin
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Vladimir Maizlish
- Department of Technology of Fine Organic Synthesis, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Svetlana Pukhovskaya
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Alena Voronina
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Ilya Kuzmin
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Natalya Futerman
- Department of Inorganic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Oleg Golubchikov
- Department of Organic Chemistry, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
| | - Oskar Koifman
- Department of Chemistry and Technology of Macromolecular Compounds, Ivanovo State University of Chemistry and Technology, Ivanovo 153000, Russia
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30
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Székely G, Bagi N, Kaizer J, Speier G. Oxidation of 3,5-di-tert-butylcatechol and 2-aminophenol by molecular oxygen catalyzed by an organocatalyst. NEW J CHEM 2015. [DOI: 10.1039/c5nj01405k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,3,2-Oxazaphosphole is an excellent biomimetic organocatalyst for the oxidation of 3,5-di-tert-butylcatechol and o-aminophenol to the corresponding quinone and 2-amino phenoxazine-3-one.
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Affiliation(s)
- Gábor Székely
- Department of Chemistry
- University of Pannonia
- H-8200 Veszprém
- Hungary
| | - Nárcisz Bagi
- Department of Chemistry
- University of Pannonia
- H-8200 Veszprém
- Hungary
| | - József Kaizer
- Department of Chemistry
- University of Pannonia
- H-8200 Veszprém
- Hungary
| | - Gábor Speier
- Department of Chemistry
- University of Pannonia
- H-8200 Veszprém
- Hungary
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31
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Dey SK, Mukherjee A. Manganese(III) acetate mediated catalytic oxidation of substituted dioxolene and phenols. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.08.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Yadav A, Mathur P. p-Quinoneimine as an intermediate in the oxidative coupling of 2-amino-5-methylphenol to 4a,7-dimethyldihydro-2-aminophenoxazinone catalyzed by a monomeric copper(II) complex. CATAL COMMUN 2014. [DOI: 10.1016/j.catcom.2014.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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33
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Panja A. Selective coordination of multidentate ligands in manganese(II) complexes: Syntheses, structures and phenoxazinone synthase mimicking activity. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.05.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Panja A. Syntheses and structural characterizations of cobalt(II) complexes with N4-donor Schiff base ligands: Influence of methyl substitution on structural parameters and on phenoxazinone synthase activity. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.02.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Panja A, Shyamal M, Saha A, Mandal TK. Methylene bridge regulated geometrical preferences of ligands in cobalt(iii) coordination chemistry and phenoxazinone synthase mimicking activity. Dalton Trans 2014; 43:5443-52. [DOI: 10.1039/c3dt52597j] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Panja A. Metal ionic size directed complexation in manganese(ii) coordination chemistry: efficient candidates showing phenoxazinone synthase mimicking activity. RSC Adv 2014. [DOI: 10.1039/c4ra03427a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Influence of the ionic size of metal on the diverse coordination chemistry of manganese(ii) has been examined by X-ray diffraction and IR spectral studies, and their relative phenoxazinone synthase activity has also been explored.
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Affiliation(s)
- Anangamohan Panja
- Postgraduate Department of Chemistry
- Panskura Banamali College
- Panskura RS, India
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37
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Panja A. Exclusive selectivity of multidentate ligands independent on the oxidation state of cobalt: influence of steric hindrance on dioxygen binding and phenoxazinone synthase activity. Dalton Trans 2014; 43:7760-70. [DOI: 10.1039/c3dt53546k] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Hassanein M, El-Khalafy S, Shendy S. 5,10,15,20-Tetrakis-(4-sulfonatophenyl)porphyrinatocobalt(II) supported on ion exchange resin as reusable and effective catalyst for the oxidative coupling of 2-aminophenol to 2-aminophenoxazine-3-one. CATAL COMMUN 2013. [DOI: 10.1016/j.catcom.2013.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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39
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Oxidative Dimerization of o-Aminophenol by Heterogeneous Mesoporous Material Modified with Biomimetic Salen-Type Copper(II) Complex. Catal Letters 2013. [DOI: 10.1007/s10562-012-0959-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Panja A, Guionneau P. The first example of a centro-symmetrical bis(imido)-bridged dinuclear cobalt(iii) complex: synthesis via oxidative dehydrogenation and phenoxazinone synthase activity. Dalton Trans 2013; 42:5068-75. [DOI: 10.1039/c3dt32788d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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El-Khalafy SH, Hassanein M. Oxidation of 2-aminophenol with molecular oxygen and hydrogen peroxide catalyzed by water soluble metalloporphyrins. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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42
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Hosseinnia A, Keyanpour-Rad M. New approaches to photocatalytic reaction of low concentrations of arylamines in alcohols. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-011-0472-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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43
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Li D, Tong Y, Huang J, Ding L, Zhong Y, Zeng D, Yan P. First observation of tetranitro iron (II) phthalocyanine catalyzed oxidation of phenolic pollutant assisted with 4-aminoantipyrine using dioxygen as oxidant. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.06.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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44
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A Waste-Free and Highly Effective Catalytic System for the Oxidation of Cysteine to Cystine. Catal Letters 2010. [DOI: 10.1007/s10562-010-0289-0] [Citation(s) in RCA: 4] [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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45
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An innovative method for oxidative degradation of chitosan with molecular oxygen catalyzed by metal phthalocyanine in neutral ionic liquid. Carbohydr Res 2009; 344:2010-3. [DOI: 10.1016/j.carres.2009.06.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 06/18/2009] [Accepted: 06/19/2009] [Indexed: 11/20/2022]
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