Study of thermal stability of β-cyclodextrin/metal complexes in the aspect of their future applications

2010 ◽  
Vol 69 (3-4) ◽  
pp. 461-467 ◽  
Author(s):  
Wojciech Ciesielski ◽  
Tomasz Girek
Keyword(s):  
Thermal Stability ◽  
Metal Complexes ◽  
Thermal Stability Of

scholarly journals Synthesis of Self-colored Thermal Stabilized Acrylonitrile/Itaconic Copolymers

2019 ◽  
Vol 35 (2) ◽  
pp. 785-791
Author(s):  
AZZA ABDULLAH Al-GHAMDI
Keyword(s):  
Thermal Stability ◽  
Metal Complexes ◽  
Itaconic Acid ◽  
Ammonium Hydroxide ◽  
High Thermal Stability ◽  
Potassium Persulfate ◽  
Ammonium Hydroxide Solution ◽  
Thermal Stability Of ◽  
Thermal Stable ◽  
Oligomerization Reaction

Acrylonitrile (AN) was copolymerized with itaconic acid metal complexes [Co(II),Ni(II),Cu(II)] aiming to synthetize self-colored acrylonitrile fiber. The copolymerization occurred in water at 60°C using sodium bisulfite and potassium persulfate as redox initiators. The resulting copolymers are colored and exhibited high thermal stability as shown from their TGA curves. The investigated copolymers exhibited comparable thermal stability as that of PAN. The AN/ itaconic acid Co(NO3)2copolymer was considerably the most thermal stable copolymer while that of Ni(II) copolymer was the less stable one. Cu(II) copolymer showed an intermediate stability. The data also revealed that the maximum degradation occurred after 300°C (the cyclization temperature). Thus, neither the copolymerization nor the complexation affected the nitrile oligomerization reaction. The effect of adding ammonium hydroxide solution to acrylonitrile – itaconic acid copper(II) complex copolymer on the thermal stability of copolymer was also studied.

scholarly journals Preparation and Characterization of 1,2,3,4- Butane four Carboxylate Transition Metal Complexes

2019 ◽  
Vol 25 ◽  
pp. 03005
Author(s):  
Kanglong Zhang ◽  
Xiaojin Qi
Keyword(s):  
Thermal Stability ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Polymer Materials ◽  
Tetracarboxylic Acid ◽  
Composition And Structure ◽  
Finishing Agent ◽  
Medical Polymer ◽  
Thermal Stability Of

1,2,3,4- butane four carboxylic acidis (Na4C8H6O8) is mainly used to prepare photosensitive materials, medical polymer materials and functional polymer membrane materials.As a permanent finishing agent, 1,2,3,4- butane four carboxylic acid plays an irreplaceable role.In this paper, the preparation of metal complexes by the reaction of 1,2,3,4-butane tetracarboxylic acid tetrasodium salt (Na4C8H6O8) with transition metals is described. The composition and structure of the prepared metal complexes were characterized by infrared spectroscopy, thermogravimetric analysis and elemental analysis. At the same time, through the analysis of thermogravimetric curves, the order of thermal stability of metal complexes is (from large to small): Co2C8H6O8·2H2O > Cd2C8H6O8 ·2H2O > Mn2C8H6O8·2H2O > Ni2C8H6O8·2H2O > Zn2C8H6O8·2H2O > Zn2C8H6O8·2H2O > Cu2C8H6O8 ·2H2O.

Thermally stable oligomer—Metal complexes based on oligo-ortho-aminophenol and oligophenylazomethinephenol

2006 ◽  
Vol 60 (4) ◽  
Author(s):  
H. Mart ◽  
M. Koç ◽  
V. Muradoğlu ◽  
H. Yürük
Keyword(s):  
Thermal Stability ◽  
Thermogravimetric Analysis ◽  
Metal Ions ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Thermally Stable ◽  
Oxidative Polycondensation ◽  
Thermooxidative Decomposition ◽  
Polymer Metal ◽  
Thermal Stability Of

AbstractThe oligo-ortho-aminophenol was synthesized by the oxidative polycondensation of ortho-aminophenol with air oxygen. The oligophenylazomethinephenol was synthesized by the condensation of aniline with oligosalicylaldehyde. Metal complexes of these oligomers with Cu(II), Co(II), Zn(II), and Ni(II) were synthesized and characterized. Based on the results of thermogravimetric analysis, synthesized oligomer—metal complexes were more stable against heat and thermooxidative decomposition than some polymeric Schiff bases and polymer—metal complexes. Additionally, the presence of metal ions increased the thermal stability of oligo-ortho-aminophenol, while the thermal stability of oligophenylazomethinephenol was lowered.

Study of thermal stability of tetraarenoporphyrazine metal complexes

2009 ◽  
Vol 79 (6) ◽  
pp. 1210-1213 ◽  
Author(s):  
S. V. Efimova ◽  
A. B. Korzhenevskii ◽  
L. V. Markova ◽  
O. I. Koifman
Keyword(s):  
Thermal Stability ◽  
Metal Complexes ◽  
Thermal Stability Of

Synthesis, Characterization and Thermal Study of Some Transition Metal Complexes Derived from Quinoxaline-2,3-Dione

2018 ◽  
pp. 209
Author(s):  
Taghreed M. Musa ◽  
Mahmoud Najim A.Al-jibouri ◽  
Bayader Fadhil Abbas
Keyword(s):  
Thermal Stability ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Dsc Analysis ◽  
Visible Spectra ◽  
Elemental Analyses ◽  
Ft Ir ◽  
Uv Visible ◽  
Thermal Stability Of

   The present paper describes the synthesis and structural studies of new transition metal complexes of cobalt(II), nickel(II), copper(II) and cadmium(II) with two bi dentate ligands derived from quinoxaline-2,3-dione. The two ligands were fully identified by elemental analyses, FT-IR, NMR and UV-Visible spectra. The metal complexes of  Co(II), Ni(II), Cu(II) and Cd(II) were isolated in the solid state after reactions of their metal chlorides with the ligands in 2:1 mole ratio. The isolated solid metal complexes were characterized with the help of elemental analyses, NMR, FT-IR and UV-Visible spectra. As well as the thermal stability of the coordinated quinoxaline polymers were tested by TG-DSC analysis and it is found that cleavage of terminal moiety was investigated, the strong coordinated bonds between oxygen donor atoms in L1 while nitrogen donor atoms of quinoxaline ring in the L2 with the metal ions. Furthermore, the thermal stability of cobalt(II), nickel(II), copper(II) and Cd(II) complexes were screened by TG-DSC analysis and the results helped us in the investigation of the proposed structure of the prepared complexes in the formula [M(L)2Cl2].XH2O and [Cd(L)2]Cl2 where L= L1 and L2  ligands derived from quinoxaline-2,3-dione.  

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