scholarly journals Microwave Synthesis, Reactivity, Spectral and Thermal Analysis of Some Binary/Mixed Ligand Oxovanadium(IV) Complexes

2012 ◽  
Vol 1 (1) ◽  
pp. 121-133 ◽  
Author(s):  
A. P. MISHRA ◽  
L.R. PANDEY ◽  
RAJENDRA K JAIN
Keyword(s):  
Thermal Analysis ◽  
Microwave Synthesis ◽  
Mixed Ligand

Interaction of ditertiary phosphines with phenyl- and 1-naphthyldithiocarbamatonickel(II)

1985 ◽  
Vol 50 (6) ◽  
pp. 1383-1390
Author(s):  
Aref A. M. Aly ◽  
Ahmed A. Mohamed ◽  
Mahmoud A. Mousa ◽  
Mohamed El-Shabasy
Keyword(s):  
Thermal Analysis ◽  
Powder Diffraction ◽  
Spin Structure ◽  
Magnetic Measurements ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
X Ray ◽  
Square Planar

The synthesis of the following mixed ligand complexes is reported: [Ni(phdtc)2(dpm)2], [Ni(phdtc)2(dpe)2], [Ni(phdtc)2(dpp)3], [Ni(1-naphdtc)2(dpm)2], [Ni(1-naphdtc)2], and [Ni(1-naphdtc)2(dpp)2], where phdtc = PhNHCSS-, 1-naphdtc = 1-NaPhNHCSS-, dpm = Ph2PCH2PPh2, dpe = Ph2P(CH2)2PPh2, and dpp = Ph2P(CH2)3PPh2. The complexes are characterised by microanalysis, IR and UV-Vis spectra, magnetic measurements, conductivity, X-ray powder diffraction, and thermal analysis. All the mixed ligand complexes are diamagnetic, and thus a square-planar or square-pyramidal (low-spin) structure was proposed for the present complexes.

Microwave synthesis, spectroscopy, thermal analysis and crystal structure of an one-dimensional polymeric {[Cu(4,4′-bipy)(H2O)3(SO4)]·2H2O}n complex

2009 ◽  
Vol 362 (7) ◽  
pp. 2435-2439 ◽  
Author(s):  
Hirihattaya Phetmung ◽  
Sukanya Wongsawat ◽  
Chaveng Pakawatchai ◽  
David J. Harding
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Microwave Synthesis ◽  
One Dimensional

scholarly journals Люминесцентные свойства разнолигандных beta-дикетонатов неодима, полученных в среде сверхкритического диоксида углерода в полимерных матрицах различной природы

2020 ◽  
Vol 129 (7) ◽  
pp. 869
Author(s):  
В.С. Каплин ◽  
А.С. Копылов ◽  
Т.С. Зархина ◽  
П.С. Тимашев ◽  
А.Б. Соловьева
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Polymer Matrix ◽  
Supercritical Co2 ◽  
Binary Systems ◽  
Ternary Systems ◽  
Mixed Ligand ◽  
Luminescence Spectra

Multi-ligand phosphor complexes of neodymium acetylacetonate with phenanthroline are synthesized in polymer matrices (oligourethane methacrylate, fluoroplast, polycarbonate) in supercritical carbon dioxide medium. At the same time the role of one of the ligands in such complexes is played by fragments of the polymer matrix. The luminescence spectra of the obtained ternary systems are described. It was shown that the position of the luminescence maxima is bathochromically shifted relative to the binary systems Nd(Acac)3/polymer obtained in a similar way and the magnitude of the shift depends on the nature of the polymer matrix. It was shown that upon the introduction of these components into polymers from a solution, similar phosphor mixed-ligand neodymium complexes do not form. The formation of new structures Nd(Acac)3/Phen/polymer upon impregnation of oligourethane methacrylate with neodymium β-diketonate and phenanthroline in a supercritical CO2 medium was confirmed by the method of differential thermal analysis. The same method confirmed that with the introduction of these components from the solution of the above systems do not form.

scholarly journals Microwave synthesis of mixed ligand diimine–thiosemicarbazone complexes of ruthenium(ii): biophysical reactivity and cytotoxicity

2009 ◽  
pp. 10757 ◽  
Author(s):  
Floyd A. Beckford ◽  
Michael Shaloski, Jr. ◽  
Gabriel Leblanc ◽  
Jeffrey Thessing ◽  
Lesley C. Lewis-Alleyne ◽  
...  
Keyword(s):  
Microwave Synthesis ◽  
Mixed Ligand ◽  
Thiosemicarbazone Complexes

scholarly journals MIXED-LIGAND ACETYLACETONATE COMPLEXES OF LANTANUM (III) AND GADOLINIUM (III) WITH CARBOXYLIC ACIDS AND ACETONITRILE OR DIMETHYLFORMAMIDE

2019 ◽  
Vol 85 (1) ◽  
pp. 3-12
Author(s):  
Lyudmila Sliusarchuk ◽  
Lidia Zheleznova ◽  
Artem Mishchenko
Keyword(s):  
Thermal Analysis ◽  
Empirical Method ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Ionic Radii ◽  
Chemical Modeling ◽  
Computational Data ◽  
The Stability ◽  
Semi Empirical ◽  
Volatile Precursors

This paper presents the study of mixed-ligand complexes of Ln(III), which are used as volatile precursors in CVD processes for the preparation of lanthanide-containing films and coatings. New mixed-ligand acetylacetonate complexes of lanthanides (III) with acetic (propionic) acid and acetonitrile or dimethylformamide were synthesized and investigated by physic-chemical methods of analysis (elemental analysis, differential thermal analysis, IR spectroscopy, powder X-ray diffraction). Using mixed-ligand complexation, the properties of the initial lanthanide β-diketonates (in particular, chemical and thermal stability) can be changed significantly. To assess the stability of the synthesized mixed-ligand complexes, their quantum-chemical modeling was performed using the semi-empirical method Sparkle/PM7. Standard changes of the Gibbs energy ∆G0298 were calculated for the solution reaction of (1) synthesis of mixed-ligand complexes and (2) substitution of one of the β-diketonate ligands in the Ln(III) tris-acetylacetonates dihydrates by an acetate ion or propionate ion. The ∆G0298 values for the syntesis reaction mainly increases with increasing donor basicity and decreasing ionic radii Ln(III) in the La>Gd>Lu series. For all mixed ligand complexes of Ln(III), the heats of formation are negative, which indicates their thermodynamic stability in solution. It was established that the obtained complexes have the same composition of the general formula [Ln(AA)2·L·2D], where Ln (III) = La, Gd; НАА- acetylacetonе; L - anion of acetic (HAc) or propionic (HРrop) acids, D- acetonitrile (AN), dimethylformamide (DMFA). The results of the thermal analysis confirm the computational data: in the case of the lanthanum mixed-ligand complexes, the carboxylic acid is coordinated to the central ion through bridging carboxylate-ions, which contributes to the formation of oligomers. The lanthanum mixed-ligand complexes are not volatile due to their oligomeric structure. On the other hand, similar gadolinium complexes are monomeric and sublimate at 180 - 350 °C.

scholarly journals Microwave-Assisted Synthesis of Some New Mixed Ligand Ni(II) Complexes Its Characterization and Its Antimicrobial Study

2021 ◽  
pp. 143-152
Author(s):  
Jitendra M. Pawara ◽  
Sunil S. Patil
Keyword(s):  
Thermal Analysis ◽  
Conventional Method ◽  
Mixed Ligand ◽  
High Yield ◽  
Microwave Assisted Synthesis ◽  
Microwave Method ◽  
Preparation Time ◽  
Microwave Assisted ◽  
Microwave Assisted Method ◽  
Very High

Nickel(II) complexes of the type [Ni(P)(L).2H2O] has been synthesized by using 2-amino-6-methyl pyrimidine-4-ol (HP) and amino acids (HL). Complexes synthesized by conventional as well as microwave methods. Results indicate that complexes synthesized by the microwave method are more efficient than the conventional method. In the microwave method preparation time is short (4-7 min.) compared to the conventional method (45 min.). Moreover, the microwave Assisted method gives a very high yield (90%) of the complexes. The microwave method used for the synthesis of the complexes has been found easier, convenient and eco-friendly. Complexes have been characterized by FTIR, Elemental analysis, Gouy experiment, Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA). Complexes have shown significant antimicrobial activity.

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