کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10557406 | 968891 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic, electronic and electrochemical studies of mono and binuclear Cu(II) complexes using novel macrocyclic ligands
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A series of new mono and binuclear copper (II) complexes [Cul]X2and [Cu2lX2] where 1 = L1, L2 and L3 are the macrocyclic ligands. In mononuclear complexes the geometry of Cu(II) ion is distorted squareplanar and in binuclear complexes the geometry of Cu(II) is tetragonal. The synthesized complexes were characterized by spectroscopic (IR,UV-vis and ESR) techniques. Electrochemical studies of the complexes reveals that all the mononuclear Cu(II) complexes show a single quasireversible one-electron transfer reduction wave (Epc = â0.76 to â0.84 V) and the binuclear complexes show two quasireversible one electron transfer reduction waves (Epc1 = â0.86 to â1.01 V, Epc2 = â1.11 to â1.43 V) in cathodic region. The ESR spectra of mononuclear complexes show four lines with nuclear hyperfine splittings with the observed g11 values in the ranges 2.20-2.28, g⥠= 2.01-2.06 and A11 = 125-273. The binuclear complexes show a broad ESR spectra with g = 2.10-2.11. The room temperature magnetic moment values for the mononuclear complexes are in the range [μeff = 1.70-1.72 BM] and for the binuclear complexes the range is [μeff = 1.46-1.59 BM].
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 61, Issue 6, April 2005, Pages 1175-1180
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 61, Issue 6, April 2005, Pages 1175-1180
نویسندگان
Nidhi Gupta, Rachna Gupta, Sulekh Chandra, S.S. Bawa,