Thermal
stability of some new complexes bearing ligands with polymerizable groups |
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| Authors: | Mihaela Badea Rodica Olar Dana Marinescu E Segal A Rotaru |
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| Institution: | (1) Faculty of Chemistry, Department of Inorganic Chemistry, University of Bucharest, Bucharest, Romania, 050663 Sector 5, 90-92 Panduri St.;(2) Faculty of Chemistry, Department of Physical Chemistry, University of Bucharest, Bucharest, Romania, 4-12 Elisabeta blvd |
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| Abstract: | A series of new complexes with mixed ligands
of the type M(4,4’-dipy)(C3H3O2)2(H2O)y ((1) M=Mn, y=2; (2) M=Ni, y=2; 4,4’-dipy: 4,4’-dipyridyl and C3H3O2 is acrylate anion) and respectively M2(4,4’-dipy)(C3H3O2)4(H2O)y
((3) M=Cu, y=0; (4) M=Zn, y=1). The
modification evidenced in IR spectra was correlated with the presence of acrylate
ion as unidentate in the case of complex (1)
and as bidentate for others complexes. The electronic reflectance spectra
showed the d–d
transition for complex (1) and (2) characteristic for the octahedral surrounding while
the spectrum for complex (3) have the characteristic
pattern for square-pyramidal stereochemistry. The thermal behaviour steps
were investigated. The thermal transformations are complex processes according
to TG and DTG curves including dehydration, acrylate ion oxidative degradation
and thermolysis process of aromatic amine. The final products of decomposition
are the most stable metal oxides. |
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| Keywords: | acrylate complexes 4 4’ -dipyridyl formate thermal stability |
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