14284-89-0Relevant articles and documents
Synthesis of a new acetate bridged Cu(ii) building block generated 1D polymer and studies on structural, magnetic, antibacterial and anticancer properties
Pathak, Sayantan,Ghosh, Mithun K.,Mandal, Manab,Mandal, Vivekananda,Bhattacharyya, Arnab,Ghorai, Tanmay K.
, p. 2019 - 2029 (2019)
A new [Cu3(Py)6(μ-CH3COO)4(I3)2]n (1) 1D polymer has been obtained from the mixture of Cu(NO3)2·3H2O, Mn(CH3COO)2·4H2O and solid I2 in CH3COOH/pyridine (py). The asymmetric unit 1 has the formula {[Cu0.75(OAc)1(pyridine)1.5]·(I3)0.5}n with Z = 2 and it has two Cu atoms, Cu1 on a mirror plane and Cu2 at a site with crystallographically imposed 2/m symmetry where the two acetate groups lie on a mirror plane; one pyridine ring in a general position is bonded to Cu1, while the other pyridine ring lies about a twofold axis and is bonded to Cu2. All C5H5N groups are involved in π-π stacking interactions with those on neighboring Cu3 molecules to give a 1D polymeric supramolecular network resembling a metal-organic framework (MOF) with periodic voids resulting from a repeating unit consisting of [Cu3]n. Magnetic susceptibility studies in the 5.0-300 K temperature range in a 0.1 T (333 Hz) direct current (dc) magnetic field revealed the presence of weak antiferromagnetic intra-Cu3 exchange couplings. The ground state spin (S) value calculated for 1 is S = 1/2. Alternating current magnetic susceptibility studies showed that the single-molecule magnet (SMM) behavior characteristic of 1 has been lost. The cluster 1 showed antimicrobial activity on different bacteria viz. Gram positive bacteria (Bacillus cereus MTCC1272, Staphylococcus epidermidis MTCC 3086 and Enterococcus faecalis MCC 2041(T)) and Gram negative bacteria (Salmonella enterica var Typhimurium MTCC 98 and E. coli MTCC 723). The highest significant growth inhibition zone (28.0 ± 1.34 mm) for the organisms was observed in E. faecalis MCC 2041(T) in the presence of 1 which was further confirmed by time kill assay and time kill endpoints activity. Cluster 1 was also found to induce apoptotic cell damage via generation of reactive oxygen species (ROS) when studied in human cervical cancer cells (HeLa) and human breast adenocarcinoma cells (MCF7), showing IC50 values 18.54 ± 0.09 μM and 19.21 ± 0.15 μM, respectively.
A Comparison of Catalytic Effect of Nano-Mn3O4 derived from MnC2O4.2H2O and Mn(acac)3 on Thermal Decomposition of Ammonium Perchlorate
Mahdavi, Mohammad,Farrokhpour, Hossein,Tahriri, Marjan
, p. 241 - 252 (2018)
The formation and catalytic effect of Mn3O4 spinel nanoparticles on thermal decomposition of ammonium perchlorate (AP) were investigated and compared to two manganese precursors of MnC2O4·2H2O and Mn(acac)3. The catalytic effects of two coated precursors on AP thermal decomposition were measured by differential scanning calorimetric (DSC) and thermogravimetric analysis (TG). The MnC2O4·2H2O@AP composite showed a decrease in the decomposition temperature of AP from 428.35 to 310.93 °C in one step, whereas for the Mn(acac)3@AP composite, the thermal decomposition was seen in two steps at 288.04 and 323.875 °C. The kinetic triplet of activation energy (Ea), frequency factor (log A) and model of mechanism function [f(α)] of thermal decomposition for pure ammonium perchlorate,MnC2O4·2H2O@AP and Mn(acac)3@AP were investigated via two model-free (FWO, KAS and Starink) and model-fitting (Starink) methods at different conversions of α (α = 0.05–0.95). Also, the thermodynamic parameters were obtained via activation energy and frequency factor for different concentrations of catalysts.
Structural and magnetic properties of Mn-doped ZnO powders
El-Hilo,Dakhel
, p. 2202 - 2205 (2011)
A mixture of bi(acetylacetonato) zinc(II)hydrate and tris(acetylacetonato) manganese(III) complexes was thermally co-dissociated to synthesize Mn-doped ZnO powders. In order to examine the effect of oxygen vacancies on the ferromagnetic coupling of Mn ions, two preparation routes were used: in route (I) the preparation was done in an open environment, whereas in route (II) the preparation was done in a closed environment. The X-ray diffraction (XRD) and the X-ray fluorescence (XRF) measurements indicate that the Mn content in the three samples are 3.9% (I), 3.3% (II) and 4.2% (II). The XRD results showed that the Mn ions were incorporated in the ZnO crystal and that a Zn 1-xMnxO solid solution has formed. The magnetic characterization indicated that only samples prepared via route (II) exhibited a room temperature ferromagnetic component of magnetization. Furthermore, magnetic analysis showed that the magnetic moment per dopant ion in the samples examined was in the range of 4.26.1 μB/Mn. The percentages of coupled Mn atoms to the total number of Mn atoms were found to be extremely small (less than 0.1%), which by itself cannot explain the observed RT hysteresis loops. Thus, in order to produce long-range ferromagnetic order in these samples, the FM coupling has to be mediated via defects. The observed FM in this study may be attributed to the presence of oxygen vacancies, which mediate the ferromagnetic exchange between the coupled Mn ions. This is consistent with the bound magnetic polarons (BMP) model where defects like oxygen vacancies cause the polarons to overlap and give rise to a long-range ferromagnetic order in dilute magnetic semiconductors (DMS).
PROCESS FOR THE PREPARATION OF METAL ACETYLACETONATES
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Page 13-14, (2008/06/13)
The present invention provides an improved, economical and environmmentally benign process for metal complexes of acetylacetone having the general formula, M(acac)n wherein M is a metal cation selected from the group consisting of Fe, Co, Ni, Cu, Zn, Al, Ca, Mg, Mo, Ru, Re, U, Th, Ce, Na, K, Rb, Cs, V, Cr, and Mn etc., n is an integer which corresponds to the electrovalence of M, are obtained by reacting the corresponding metal hydroxide, metal hydrated oxide or metal oxide with a stoichiometric amount of acetylacetone and separating the product.
