ESR of Cu2+ doped cadmium (II) formate dihydrate

Kripal, Ram; Misra, Sanjay

doi:10.1016/j.jpcs.2003.10.065

Cited by 31 publications

(5 citation statements)

References 23 publications

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“…The 3d 9 configuration of Cu(II) is of particular interest because it represents a simple one magnetic hole system. [7] In view of the rich photophysical and catalytic properties of organometallic copper(II) complexes, the introduction of Schiff bases with an O-N-O donor set to Cu(II) complexes containing triphenylphosphine has been carried out. As on extension of our preliminary communication [8] and to provide further insight into the catalytic and electronic behaviours, an extensive series containing Schiff bases has been synthesized and characterized.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization, electrochemistry and catalytic activities of Cu(II) complexes of bifunctional tridentate Schiff bases containing ONO donors

Manimaran

Prabhakaran

Deepa

et al. 2008

Applied Organom Chemis

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Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization, electrochemistry and catalytic activities of Cu(II) complexes of bifunctional tridentate Schiff bases containing ONO donors

Manimaran

Prabhakaran

Deepa

et al. 2008

Applied Organom Chemis

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“…The angular variations associated in these planes as shown in Figure 4. These derived parameters obtained from the experimental and analytical H values (a straight line representing analytical points and the solid circle representing experimental points) both revealed the local symmetry of the crystal as orthorhombicin accordance with Jorgensen crystal field theory [15,16] i.e., according to Jorgensen crystal field theory, from the observed gxx, gyy and gzz values, the site location symmetry surrounding the Cu 2+ ion in the host crystal lattice can be determined. When gxx, gyy and gzz are equal (gxx = gyy = gzz) then it corresponds to cubic symmetry, if gxx is not equal to gyy and gzz (gxx ≠ gyy = gzz) then it corresponds to axial symmetry and if all gxx, gyy and gzz (gxx ≠ gyy ≠ gzz) are not equal then it corresponds to orthorhombic Trends Sci.…”

Section: Angular Variation Calculations Using Epr Spectramentioning

confidence: 55%

EPR Analysis of Cu2+ ion Doped Potassium borodicitrate Single Crystal

Nagarajan

Palanisamy²

2022

Trends Sci

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In our present investigation single crystals of Potassium borodicitrate (KBDC) (for a fixed content- host lattice) with Cu2+, a guest species, as a dopant (at four 0.2, 0.5, 1 and 2 g) in weight ratio have been synthesized at room temperature by using slow evaporation method. These as-synthesized 4 crystals have been subjected to Electron Paramagnetic Resonance (EPR) studies. The EPR spectrum shows that 0.5 g dopant KBDC give a 4 equidistant hyperfine lines with the perfect symmetry confirms that the localization of Cu2+, a paramagnetic impurity, within it reveals that the maximum absorption of EPR signals happens at 0.5 g Cu2+ than any other concentrations with reference to 20° in horizontal plane than the normal and vertical recording in the same angular projection. The Spin Hamiltonian calculations are used to obtain spectroscopic field splitting factor g-tensor values, gxx = 2.0421, gyy = 2.1962, gzz = 2.2827 and hyperfine splitting factor A-tensor values Axx = 150, Ayy = 112 and Azz = 134. The K–O bond length associated with directional cosines of gzz tensor reveal that the Cu2+ is located interstitially. This optimized single crystal has furtherance been subjected to Single cystal X-ray diffraction (SXRD), Fourier transform infrared Spectrascopy (FTIR). Scanning electron microscope (SEM) Energy dispersive X-ray analysis (EDAX) and compared with pure KBDC single crystal. The XRD unit cell crystalline parameter variations reveal that there is doping effect of Cu2+ into the host lattice brings forth structural coordination of Cu2+ with KBDC. The FTIR confirms that complexation of host and guest through molecular interactions in the finger print region. The EDAX mapping shows Cu2+ presence in the crystal. HIGHLIGHTS SXRD are taken to confirm that structure of pure KBDC and Cu2+ doped KBDC are same The spin Hamiltonian parameters of KBDC-Cu2+ single crystal are calculated through EPR spectra On analyzing the spectra, it is found that the doped ion site location symmetry is identified as interstitial and experience orthorhombic local field symmetry In addition to the above studies FTIR and EDX confirms the presence of Cu2+ ion GRAPHICAL ABSTRACT

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“…If their values are in the order ,812 < ? ,2, the in-plane n bonding is more covalent than the in-plane bonding, otherwise cr bonding is more covatent and the n bonding becomes significantly ionic [1,14,24,29,30]. Table 3 shows that the molecular orbital coefficients obtained by correlating EPR and optical data indicate that the in-plane cr bonding is more covalent, whereas the in-plane n bonding is more ionic.…”

Section: )mentioning

confidence: 99%

“…The EPR spectra of the Cu 2 § ion have been studied extensively and found to be informative about the environmental effects [1][2][3][4][5][6][7]. In the Cu2+-doped compounds, the Cu 2 § ion replaces the divalent cation present in the lattice, whereas there are some studies reporting that Cu 2 § ions replace the monovalent cation in the host lattice substitutionally.…”

Section: Introductionmentioning

confidence: 99%

EPR and optical-absorption studies of Cu2+-doped Zn(NH2(CH2)3NHOH)2Ni(CN)4 single crystals

et al. 2006

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Electron paramagnetic resonance of Cu2--doped catena-trans-bis(N-(2-hydroxyethyl)-ethylenediamine) zinc(II)-tetra-p.-cyanonicelate(II) [Zn(NH2(CH2)3NHOH)2Ni(CN)4 ] single crystals and powder are examined at room temperature. The spectra show the substitution of the Zn 2 § ion with the Cu :+ ion. The crystal field around the Cu 2+ ion is nearly axial. There is a single paramagnetic site with g.~, = 2.073, gyr = 2.060, gz.-= 2.248, A~, = 40.5 G, A. = 50.8 G, A= = 172.0 G. The groundstate wave function is an admixture of dx~_y-, and di-, states. The optical-absorption studies show two bands at 320 nm (31250 cm -~) and 614 nm (16286 cm-t), which confirm the axial symmetry. The crystal field parameters and the wave function are determined.

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ESR of Cu2+ doped cadmium (II) formate dihydrate

Cited by 31 publications

References 23 publications

Synthesis, spectral characterization, electrochemistry and catalytic activities of Cu(II) complexes of bifunctional tridentate Schiff bases containing ONO donors

Synthesis, spectral characterization, electrochemistry and catalytic activities of Cu(II) complexes of bifunctional tridentate Schiff bases containing ONO donors

EPR Analysis of Cu2+ ion Doped Potassium borodicitrate Single Crystal

EPR and optical-absorption studies of Cu2+-doped Zn(NH2(CH2)3NHOH)2Ni(CN)4 single crystals

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