205391-45-3Relevant academic research and scientific papers
Synthesis, characterization and catalytic activity toward dye decolorization by manganese (II) mononuclear complexes
Wegermann, Camila A.,Strapasson, Paola,Romanowski, Stela M.M.,Bortoluzzi, Adailton,Ribeiro, Ronny R.,Nunes, Fábio S.,Drechsel, Sueli M.
, p. 11 - 20 (2013)
Manganese(II) perchlorate reacts with L1 = N,N,N′-tris(2- methylpyridyl)-N′-hydroxyethyl-ethylenodiamine and L2 = N-(2-hydroxybenzyl)-N,N′-bis(2-methylpyridyl)-N′-hydroxyethyl- ethylenodiamine in ethanol to form the corresponding complexes [MnL1(H 2O)](ClO4)2 and [MnL2]ClO4. Both complexes crystallize in the monoclinic system and space group P 2 1/n. In [MnL1(H2O)]2+ and [MnL2]+ the manganese(II) ion is heptacoordinated and hexacoordinated, respectively. FTIR, elemental analysis and conductance measurements were all in accordance with the molecular structures of [MnL1(H2O)](ClO4) 2 and [MnL2]ClO4. The ability of [MnL1(H 2O)](ClO4)2 and [MnL2]ClO4 to catalyze the oxidation of the dyes methyl orange and reactive orange 16 was studied in aqueous alkaline solution (carbonate/bicarbonate buffer). Both complexes were active catalysts promoting significant enhancement of dye solution decolorization in comparison to control reactions.
A new unsymmetrical N,O-donor hexadentate ligand. Synthesis, structure and properties of its first vanadyl(IV) complex
Neves, Ademir,Romanowski, Stela Maris de Moraes,Vencato, Ivo,Mangrich, Antonio Salvio
, p. 617 - 622 (2007/10/03)
A new N,O-donor polyfunctional compound N-(2-hydroxybenzyl)-N'-(2-hydroxyethyl)-N,N'-bis(2-pyridylmethyl)ethane-1,2-diamine (H2bbpeten) and its first oxovanadium(IV) complex have been prepared in order to investigate the co-ordination chemistry of the unsymmetrical hexadentate ligand derived from an alkyldiamine containing phenolate-type, hydroxyethyl, and α-pyridyl pendant arms.The complex IVO(Hbbpeten)>PF6 1 was characterized by elemental analyses, molar conductivity, IR, electronic and EPR spectroscopies, electrochemistry and X-ray diffraction methods.Spectroelectrochemistry in the UV/VIS spectral region has also been used to characterize the VVO3+ analogue.The value E1/2=0.427 V vs. ferrocenium-ferrocene obtained from spectropotentiostatic data is consistent with cyclovoltammetric results.The electronic spectrum of the oxidized species shows two intense LMCT transitions in the 350-550 nm range, and solutions of VO(Hbbpeten)>2+ are stable on the time-scale of the experiments.A plot of E1/2 vs. number of co-ordinated phenolates for 1 and structurally related complexes shows a fairly linear trend.
