The electronic (absorption and reflectance) as well as the infrared and Raman spectra of Na6[(VO)3(P2O7)3]·7H2O were recorded and discussed. Its thermal behavior was investigated by means of TG and DTA measurements. After a two-step dehydration, the compound melts at 464°C and, apparently, depolymerization takes place during this process. The characteristics of the pyrolysis residues, collected at different temperatures, were spectroscopically investigated.
Authors:Viorel Sasca, Elena Mosoarca, Livia Avram, Ramona Tudose, and Otilia Costisor
The thermal decomposition of Mannich base N,N′-tetra(4-antipyrylmethyl)-1,2-diaminoethane (TAMEN), and its Ni(II), binuclear
complex, Ni2(TAMEN)Cl4, in air and in nitrogen atmosphere, were investigated. X-ray powder diffractometry, infrared spectroscopy and simultaneous
thermogravimetry-differential thermal analysis (TG-DTA), have been used to characterize and to study the thermal behavior
of these compounds. The results provided information concerning the stoichiometry, crystallinity, thermal stability and decomposition
mechanism of the compound.
Authors:Marcelo Kobelnik, Douglas Lopes Cassimiro, Adélia Emilia de Almeida, Clóvis Augusto Ribeiro, and Marisa Spirandeli Crespi
The present article is an extension of previous studies [ 1 – 3 ], and it is a part of our research on the thermalbehavior interaction among the diclofenac and metal ions. The diclofenac (2
Authors:Cristina Bucur, Mihaela Badea, Calu Larisa, Dana Marinescu, Maria Nicoleta Grecu, Nicolae Stanica, Mariana Carmen Chifiriuc, and Rodica Olar
and many of these studies were dedicated to bis(macrocycles) based on cyclam moieties [ 1 ]. Some complexes with a polyaza bismacrocyclic ligand have recently studied concerning thermalbehaviour [ 20 ].
In order to gain further insight into
Authors:Vikram Singh, Lalit Kumar, Vinay Kumar, A. K. Narula, and Gagan Deep
. It has been widely used as a chelate ligand in coordination chemistry [ 9 ].
In this study, the curing and thermalbehaviour of DGEBA has been investigated using the very cheaper amines i.e., biuret.
Authors:Rodrigo A. de Souza, Antonio E. Mauro, Adelino V. G. Netto, Gislaine A. da Cunha, and Eduardo T. de Almeida
As a part of our ongoing studies on the biological properties [ 4 – 6 ], structure determinations [ 7 – 9 ], and thermalbehavior [ 10 – 13 ] of Pd(II) compounds bearing N -based ligands, we report herein the synthesis, spectroscopic characterization
This paper reports the investigation of the thermal
stability of a series of new complexes with azo and azomethinic chromophores
of the type [Er(HL)2(H2O)2](HO);
((B) H2L: o,o’-dihydroxy-azobenzene (A);
(D) H2L: N-(2-hydroxy-1-naphthalidene)aminophenol
H2L: N-(2-hydroxy-1-naphthalidene)anthranilic acid
(E)). The complexes thermal behaviour steps
were investigated and comparatively presented with those of corresponding
ligand. The thermal transformations are complex processes according to TG
and DTG curves including phenol elimination, oxidative condensation and thermolysis
processes. The final product of complexes decomposition is Er2O3.
The effect of 4 mass% Ag addition on the thermal behavior of the Cu-9 mass% Al alloy was studied using differential scanning
calorimetry (DSC), optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and
X-ray diffractometry (XRD). The results showed that the presence of silver causes (Cu)-α+(α+g1)→ (Cu)-α+β transformation to
occur in two stages. In the first one, part of the produced b phase combines with the precipitated Ag to give a silver-rich
phase and in the second one the transformation is completed. The formation of this silver-rich phase seems to be enhanced
at very low cooling rates.
Authors:A. Magdalena, A. Adorno, R. Silva, and T. Carvalho
In this work the effect of Ag concentration on the thermal behavior of the Cu-10 mass% Al and Cu-11 mass% Al alloys with additions
of 4, 6, 8 and 10 mass% Ag was studied using differential scanning calorimetry (DSC), in situ X-ray diffractometry (XRD) and
scanning electron microscopy (SEM). The results showed that for the Cu-10 mass% Al alloy Ag addition induce the β′1 phase formation and for the Cu-11 mass% Al alloy these additions increase the amount of martensite formed on quenching and
decrease the stability range of this phase on heating.