Synthesis, characterization and catalytic activity toward dye decolorization by manganese (II) mononuclear complexes
摘要:
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(H2O)](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(H2O)](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. (C) 2013 Elsevier B.V. All rights reserved.
oxygen in solution and rapidly convert into vanadium(V) dioxido species. Vanadium(V) dioxido species crystalizes as the dimeric form in the solid‐state. Single‐crystal XRD analysis suggests octahedral geometry around each vanadium center in the solid‐state. To access the benefits of heterogeneous catalysis, vanadium(V) dioxido complexes were anchored into the polymeric chain of chloromethylated polystyrene
通过使[VO(acac))反应制备两种钒(IV)络合物[V IV O(Haeae-sal)(MeOH)] +(1)和[V IV O(Haeae-hyap)(MeOH)] +(2)2 ]分别带有配体[H 2 aeae-sal](I)和[H 2 aeae-hyap](II)。2-(2-氨基乙基氨基)乙醇与水杨醛和2-羟基苯乙酮的缩合分别生成配体(I)和(II)。钒配合物1和2对溶液中的空气中的氧气敏感,并迅速转化为钒(V)二氧化物。钒(V)二氧化物物种以固态形式二聚体形式结晶。单晶XRD分析表明固态中每个钒中心周围的八面体几何形状。为了获得多相催化的益处,将钒(V)二氧化物配合物固定在氯甲基化聚苯乙烯的聚合物链中。已通过多种技术对所有合成的纯净和负载型钒配合物进行了研究,以确认其结构和功能特性。合成的钒(V)二氧化物配合物3和4的溴过氧化物酶活性通过水杨醛的氧化溴化反应和硫代苯甲醚的氧化反应进
An easy and accessible water-soluble sensor for the distinctive fluorescence detection of Zn<sup>2+</sup> and Al<sup>3+</sup> ions
作者:Tianqi Liu、Yunsheng Dong、Xuejuan Wan、Weibin Li、Youwei Yao
DOI:10.1039/c5ra15126k
日期:——
A water-soluble fluorescence sensor was facilely synthesized and it can be used for the distinctive fluorescence detection of Zn2+ and Al3+ ions.
一种水溶性荧光传感器被简便地合成,可用于区分性地检测Zn2+和Al3+离子的荧光。
Nickel(II) complexes of new asymmetrical, tetradentate (N2O2) schiff bases derived from N-(2-hydroxyethyl)ethylenediamine
作者:Gerard Cros、Jean-Pierre Laurent
DOI:10.1016/s0020-1693(00)85246-9
日期:1985.11
Abstract Five new nickel(II) complexes are described. They are obtained fromSchiffbases resulting from the condensation of N-(2-hydroxyethyl)ethylenediamine with 2,4-pentanedione, 3-(ethoxymethylene-2,4-pentanedione, 1-benzoylacetone, salicyclaldehyde, and 2-hydroxyacetophenone, respectively. Chemical analyses, conductivity measurements, and infrared data support a dimeric structure involving a single
the cleavage efficiency varies in the order 5 > 3 > 2 > 4 > 1 with 5 displaying the highest Kcat value (5.47 +/- 0.10 h(-1)). The same order of cleavage is observed for the oxidative cleavage of DNA in the presence of ascorbic acid as a reducing agent. Interestingly, of all the complexes, only 5 displays efficient photonuclease activity through double-strand DNA breaks upon irradiation with 365 nm
Dinuclear copper(II) complexes of “end-off” bicompartmental ligands: Alteration of the chelating arms on ligands to regulate the reactivity of the complexes towards DNA
evaluated as potential nuclease models. The basicity behavior and coordination property of each ligand towards Cu(II) ion in aqueous solution were investigated by pH potentiometric titrations accompanied by ESI-MS and spectrometry. Both ligands show a strong tendency to chelate Cu(II) generating dinuclear copper(II) complexes in Cu(II)/L molar ratio of 2:1 in the pH range of 3-11, and when pH is 7.40 the