115-39-9Relevant articles and documents
Dinuclear vanadium complexes with rigid phenylpolycarboxylate ligands: Synthesis, structure, and catalytic bromination reaction with potential detection of hydrogen peroxide
Zhang, Rui,Zhang, Xiao-Xi,Bai, Feng-Ying,Chen, Chen,Guan, Qing-Lin,Hou, Ya-Nan,Wang, Xuan,Xing, Yong-Heng
, p. 1613 - 1628 (2014)
Vanadium complexes (VO)2(2,2′-bipy)2(bta) (H2O)2 (1) and (VO)2(1,10-phen) 2(bta)(H2O)2 (2) (H4bta = 1,2,4,5-benzenetetracarboxylic acid, 2,2′-bipy = 2,2-bipyridine and 1,10-phen = 1,10-phenanthroline) have been synthesized by the reaction of V 2(SO4)3, H4bta, 2,2′-bipy (for 1) and 1,10-phen (for 2) by hydrothermal methods. The complexes were characterized by elemental analysis, IR, UV-vis, thermogravimetric analyses, and single-crystal X-ray diffraction. Structural analyses indicate that 1 and 2 are both VO-bta-N-heterocycle system complexes. The central vanadium is coordinated by N2O4 donors to form a distorted octahedral geometry. The complexes exhibit catalytic bromination activity in a single-pot reaction with conversion of phenol red to bromophenol blue in a mixed solution of H 2O-DMF at 30 ± 0.5°C with pH 5.8, indicating that they can be considered as a functional model of vanadium-dependent haloperoxidases. The practical application of H2O2 detection has also been studied. 2014
Development of a multifunctional biomimicking l-cysteine based oxovanadium(IV) complex: Synthesis, DFT calculations, bromo-peroxidation and nuclease actIVity
Saha, Urmila,Mukherjea, Kalyan K.
, p. 94462 - 94473 (2015)
An oxovanadium complex [VO(sal-l-cys)(phen)] (sal-l-cys = Schiff base derived from salicylaldehyde and l-cysteine; phen = 1,10-phenanthroline) has been synthesized and characterized by spectroscopic studies (IR, UV-vis, ESI-MS and EPR studies). The structure of the complex has been optimized by density functional theory (DFT) calculations. Time-dependent DFT (B3LYP) calculations were used to establish and understand the nature of the electronic transitions observed in UV-vis spectra of the ligand and the complex. The multifunctionality of this oxovanadium complex has been exhibited by the application of it as a catalyst in peroxidative bromination of phenol red to demonstrate vanadium dependent bromoperoxidase activity, whereas nuclease activity has been established by DNA cleavage. The interaction of DNA with this structurally characterized oxovanadium complex has been studied by various physicochemical tools like UV-vis, fluorescence, and viscosity measurement studies. The intrinsic binding constant of the complex with DNA has been determined by electronic absorption studies and calculated to be (3.51 ± 0.02) × 104 M-1. The spectroscopic studies and the viscosity measurements indicate that the complex binds CT DNA by an intercalative mode. The ability of the complex to induce DNA cleavage was studied by gel electrophoresis techniques. The complex has been found to promote cleavage of pUC19 plasmid DNA from the super coiled (SC) form I to nicked coiled (NC) relaxed form II.
Bromoperoxidase mimic as catalysts for oxidative bromination - Synthesis, structures and properties of the diversified oxidation state of vanadium(iii, iv and v) complexes with pincer N-heterocycle ligands
Chen, Chen,Sun, Qiao,Ren, Dong-Xue,Zhang, Rui,Bai, Feng-Ying,Xing, Yong-Heng,Shi, Zhan
, p. 5561 - 5573 (2013)
Novel oxovanadium complexes (VO)2(bpz*T-O) (1), VO(bpz*eaT)(SCN)2 (2), V2(bpz*eaT) 2(μ2-C2O4)(C2O 4)2 (3), [VO(SO4)(bpz*P)(H 2O)]·H2O (4) and VO(SO4)(bpz*P-Me) (H2O) (5) (bpz*T-O: 4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5- triazin-2-olate, bpz*eaT: 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6- diethylamino-1,3,5-triazine, bpz*P: 2,6-bis(5-methyl-pyrazol-3-yl) pyridine, bpz*P-Me: 2,6-bis(1,5-dimethyl-pyrazol-3-yl)pyridine), were synthesized by the reaction of V2(SO4)3- VOSO4-VO(acac)2 and various pincer N-heterocyclic ligands with solution or hydrothermal methods. The structures of all the complexes were characterized by elemental analysis, IR and UV-vis spectroscopy and single-crystal diffraction analysis. Furthermore, thermogravimetric analyses (TG) and quantum chemistry calculations were also performed. Structural analyses reveal that the vanadium atom has a distorted trigonal bipyramidal geometry with a N3O2 donor set in 1; distorted octahedral geometry in 2, 4 and 5 with donor sets of N5O, N3O3 and N3O3, respectively; a distorted pentagonal bipyramidal geometry with a N3O4 donor set in 3. In addition, the five new complexes with abundant intro- and inter-hydrogen bonding interactions exhibited bromination catalytic activity in a single-pot reaction of the conversion of phenol red to bromophenol blue in a mixed solution of H 2O-DMF at a constant temperature of 30 ± 0.5°C with a buffer solution of NaH2PO4-Na2HPO4 (pH = 5.8), indicating that they can be considered as a potential functional model of bromoperoxidase. The Royal Society of Chemistry 2013.
Experimental and theoretical studies on vanadium bromoperoxidase activity of alkyne arm dioxidovanadium(V) complex: Crystal structure, spectral studies, and DFT calculations
Neelakantan,Balakrishnan, Chithiraivel,Kowsalya,Selvarani
, p. 191 - 199 (2018)
The alkyne arm bearing dioxidovanadium(V) complex was synthesized by the reaction of vanadium sulphate, 1-[2-hydroxy-4-(prop-2-yn-1-yloxy)phenyl]ethanone and propane-1,2-diamine. The synthesized complex was characterized by various spectral techniques and its structure was determined using single-crystal X-ray diffraction analysis. Vanadium centre has square-pyramidal based geometry with an axial oxido ligand and the equatorial positions are occupied by another oxido ligand and phenolato oxygen, imine nitrogen and free amine nitrogen atoms. DFT and TD-DFT calculations were examined to identify the electronic structure, and electronic transitions of the complex observed in the absorption spectra. The percentage of intermolecular interactions in the crystal structure has been evaluated by 3D Hirshfeld surfaces and 2D fingerprint plots. The C–H?π and intermolecular interactions of the complex were examined using Bader's theory of QTAIM by ADF 2017. The dioxidovanadium(V) complex mimics as an efficient vanadium-dependent bromoperoxidase towards the bromination of phenol red in acetonitrile medium at room temperature.
Mimicking vanadium haloperoxidases: Vanadium(iii)-carboxylic acid complexes and their application in H2O2 detection
Feng, Xiao Dong,Zhang, Xiao Xi,Wang, Zhi Nan,Song, Jian,Xing, Yong Heng,Bai, Feng Ying
, p. 1222 - 1229 (2016)
Vanadium(iii) complexes [V(2,6-pdc)2(H2O)2]·2H2O (1) and V(2,6-pdc)(htba)(H2O)2 (2), (2,6-pdc = 2,6-pyridinedicarboxylic acid, htba = 2-acetoxy-4-trifluoromethylbenzoic acid) have been synthesized by the reaction of V2(SO4)3 with 2,6-pdc (for 1) or 2,6-pdc and htba (for 2) under hydrothermal conditions at 120 °C for 36 hours. Because the vanadium(iii) was easily oxidized into higher oxidation states, we included the reducing agent vitamin C to protect the vanadium(iii) center. The complexes were characterized by elemental analysis, IR and UV-vis spectroscopy, and single-crystal X-ray diffraction. Structural analysis revealed that the central metal V atoms in the complexes 1 and 2 were seven-coordinate, forming pentagonal bipyramid geometries. The complexes catalyzed the bromination of the organic substrate phenol red in the presence of H2O2, bromide and buffer. Compared with vanadium complexes having other oxidation states, the vanadium(iii) complexes had better catalytic activity (the maximum reaction rate constant was 2.424 × 102k(mol L-1)-2 s-1). The mimicking vanadium haloperoxidases also overcame some serious disadvantages of natural enzymes. Therefore, the reaction system described herein can be considered as an effective model for hydrogen peroxide determination.
Crystal structure and bio-catalytic potential of oxovanadium(IV) Schiff base complexes derived from 2-hydroxy-4-(prop-2-yn-1-yloxy)benzaldehyde and alicyclic/aromatic diamines
Balakrishnan, Chithiraivel,Neelakantan
, p. 503 - 514 (2018)
Syntheses, structures, electronic properties and bio-catalytic activities of oxovanadium(IV) complexes [VOL1,VOL2] containing N,O-donor Schiff base ligands (L1 = 2,2′-{cyclohexane-1,2-diylbis[nitrilo(E)methylylidene]}bis[5-(prop-2-yn-1-yloxy)phenol] and L2 = 2,2′-{1,2-phenylenebis[nitrilo(E)methylylidene]}bis[5-(prop-2-yn-1-yloxy)phenol]) are presented. The single crystal XRD analyses show distorted square pyramidal based geometry for VOL1 and VOL2. The structure and electronic properties of the complexes were analyzed using DFT and TD-DFT calculations. The topological analysis of the electron density was carried out to analyze the bonding nature in the complexes. The bio-relevant catalytic activities (catecholase, phenoxazinone synthase and haloperoxidases) of the complexes have been investigated. The X-band EPR studies show that the oxidation of 3,5-DTBC and 2-aminophenol catalyzed by VOL1 and VOL2 are due to the formation of ligand-centered radical pathway. DFT studies support the ligand-centered radical formation in the reduced metal complexes with significant elongation of the imine bond length.
Mononuclear oxidodiperoxido vanadium(V) complex: synthesis, structure, VHPO mimicking oxidative bromination, and potential detection of hydrogen peroxide
Adhikari, Haimanti,Mukherjea, Kalyan K.
, p. 542 - 555 (2018)
An oxidodiperoxidovanadium(V) complex, (NH4)[VO(O2)2(phen)](H2O)2, has been synthesized and structurally characterized. The complex crystallizes in the P21/c space group. The vanadium center is seven-coordinate with pentagonal bipyramidal geometry. The compound was designed in order to develop a VHPO mimic, so it was tested for VHPO activity through the single pot bromination of phenol red to bromophenol blue whereby, it afforded positive response to establish that the complex is indeed a VHPO mimic. In addition, the compound is capable of detection of H2O2.
Mimicing bromoperoxidase for copper complexes: Synthesis, structures and properties of Cu(II)-triazine pyrazolyl complex
Feng, Xiao Dong,Zhang, Rui,Wang, Xin Yu,Zhang, Xiao Xi,Wang, Ji Xiao,Xing, Yong Heng,Sun, Li Xian
, p. 69 - 76 (2015)
Copper complexes [Cu2(μ2-C2O4)(HC2O4)(L1)]·(H2C2O4) (1), [Cu2(Bpz?T-OEt)2Cl2CuCl4] (Bpz?T-EtOH = L2) (2) and [Cu2(Bpz?T-O)4]·4pz?·4H2O (3) (Bpz?T-O = L3) (L1 = 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-diethylamino-1,3,5-triazine, Bpz?T = 2,4,6-tri(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine) have been synthesized in the reaction of Cu(Ac)2·2H2O, oxalic acid, L1 (for 1) or Bpz?T (for 2 and 3) and CuCl2·2H2O with solution methods. They were characterized by elemental analysis, IR, UV-Vis and thermogravimetric analyses (TG), and the single-crystal X-ray diffraction analysis. Structural analysis reveals that center metal Cu atoms in the complexes 1 and 3 are six-coordination modes, forming distorted octahedron geometries with N2, O2 and N6 donors, respectively. While Cu atom in the complex 2 is four-coordination and five-coordination modes, forming tetragonal pyramid and tetrahedron geometry with N3 Cl2 and N6, respectively. The complexes exhibit catalytic bromination activity in a single-pot reaction of the conversion of phenol red to bromophenol blue in a mixed system of H2O-DMF-KBr at the constant temperature of 30 ± 0.5 °C with a buffer solution of NaH2PO4-Na2HPO4 (pH 5.8), indicating that they can be considered as a potential functional model of bromoperoxidase.
Aminoacid-derivatized oxidovanadium complexes: Synthesis, structure and bromination reaction activity
Cao, Yun-Zhu,Zhao, Hai-Yan,Bai, Feng-Ying,Xing, Yong-Heng,Wei, Dong-Ming,Niu, Shu-Yun,Shi, Zhan
, p. 223 - 230 (2011)
A new family of aminoacid-derivatized oxidovanadium complexes as potential functional model of vanadium haloperoxidases: [VVO(sal-phe)(OMe) (MeOH)] (1), [VIVO(sal-ala)(2,2′-bipy)]·H2O (2), [VIVO(sal-ala)(1,10-phen)]·0.5H2O (3) and [VIVO(sal-his)(1,10-phen)]·2MeOH (4) (H2sal-phe = Schiff base derived from salicylaldehyde and dl-β-phenylalanine, H 2sal-ala = Schiff base derived from salicylaldehyde and dl-α-alanine, H2sal-his = Schiff base derived from salicylaldehyde and l-histidine) have been synthesized. All the complexes were characterized by elemental analysis, IR spectra and UV-Vis spectroscopy. In particular, molecular structures of three representative complexes (1, 2 and 3) were determined by X-ray crystallography. In addition, bromination reaction activity of the starting material and the complexes has been tested by a method with phenol red as organic substrate in the presence of H2O 2, Br- and phosphate buffer, the studying results indicate that the vanadium complexes can catalyze the visible conversion of phenol red to bromophenol blue under weak-acid conditions and the different structural characterizations of the complexes exhibit different catalytic activity, therefore, the complexes can be considered as a potential functional model of VHPO.
Bioinspired catalysis and bromoperoxidase like activity of a multistimuli-responsive supramolecular metallogel: Supramolecular assembly triggered by pi-pi stacking and hydrogen bonding interactions
Kurbah, Sunshine Dominic,Lal, Ram A.
supporting information, p. 5410 - 5418 (2020/04/17)
We report the synthesis and characterization of a new self-assembled VO2-L metallogel. Gel formation was investigated by dissolving VO2-L in various solvents and it was found that water/methanol (1?:?9 (v/v) ratio) induces gel formation. The single crystal X-ray structure of the VO2-L metallogel exhibits C-H?O and N-H?O hydrogen bonding interactions and pi-pi stacking. The VO2-L xerogel obtained after removing the solvents was found to exhibit outstanding performance in catalysis. Bromoperoxidase-like activity of the VO2-L metallogel was also reported. The present catalytic studies are simple and proceed under mild conditions.
