کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1403823 1501813 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization, and theoretical studies of Co(II) and Cu(II) complexes of 1-[(5-mercapto-[1,3,4]thiadiazol-2-ylimino)-methyl]-naphthalen-2-ol and its interaction with Cu nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis, characterization, and theoretical studies of Co(II) and Cu(II) complexes of 1-[(5-mercapto-[1,3,4]thiadiazol-2-ylimino)-methyl]-naphthalen-2-ol and its interaction with Cu nanoparticles
چکیده انگلیسی

The electronic absorption spectra of Schiff base namely 1-[(5-mercapto-[1,3,4]thiadiazol-2-ylimino)-methyl]-naphthalen-2-ol (H2L) was studied in organic solvents of different polarity as well as in universal buffer solutions of varying pH values at room temperature; the pKa values were calculated. The effect of Co(II) and Cu(II) ions on the electronic absorption spectra of H2L was also assigned and the stability constants of the complexes were calculated. The stoichiometry of the metal complexes was determined spectrophotometrically. Solid Co(II) and Cu(II) complexes with H2L have been synthesized and characterized on the basis of elemental analyses, molar conductance, magnetic susceptibility measurements, IR, electronic as well as ESR spectral studies. The thermal decomposition of the metal complexes was studied by TGA and DTA techniques. The thermo-kinetic parameters; activation energy, pre-exponential factor and entropy of activation were estimated. The interaction between the Schiff base under investigation and the copper nanoparticles in the ground and excited state was considered. The fluorescence quenching rate constant of Schiff base by Cu nanoparticles has a large value.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1001, Issues 1–3, 24 August 2011, Pages 1–11
نویسندگان
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