Effect of Jahn–Teller ion in zinc sodium sulphate hexahydrate: a case of low hyperfine coupling constant for Cu(II) ion

Naidu, Kershlin; Shiyamala, C.; Mithira, S.; Natarajan, B.; Venkatesan, R.; Rao, P. Sambasiva

doi:10.1080/10420150500297910

Cited by 10 publications

(2 citation statements)

References 25 publications

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“…However, when the Mn(II) ion is incorporated in CSSH, the ion is found to enter the lattice in an interstitial site only [21], contrary to the observation for Cu(II). In addition, doping of Mn(II) and Cu(II) ions in an isomorphous system, i.e., zinc sodium sulphate hexahydrate (ZSSH), has revealed that the former enters in an interstitial manner [22], whereas the latter enters substitutionally [23]. This differential behaviour of d 9 and d 5 ions in CSSH and ZSSH has prompted us to carry out single crystal EPR and optical studies by doping another d 1 ion, i.e., VO(II), in the CSSH crystal lattice.…”

Section: Introductionmentioning

confidence: 99%

Site determination of vanadyl impurity in cadmium sodium sulphate hexahydrate: single crystal EPR and optical studies

et al. 2006

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Electron paramagnetic resonance (EPR) and optical studies of VO(II) doped cadmium sodium sulphate hexahydrate (CSSH) are carried out at room temperature. The EPR spectra, recorded in the three orthogonal planes, indicate that the paramagnetic impurity has entered the lattice site both in substitutional and interstitial positions. The spin Hamiltonian parameters, calculated from the spectra for the two sites, are: site I: gxx=1.984, gyy=1.975, gzz=1.938; Axx=6.56, Ayy=7.50, Azz=18.61 mT; site II: gxx=1.982, gyy=1.978, gzz=1.940; Axx=6.88, Ayy=7.56, Azz=18.57 mT. The EPR spectrum of the powder sample also reveals the presence of two sites in the host lattice, suggesting that the two sites are chemically and magnetically inequivalent. The optical absorption spectrum exhibits three characteristic bands. Crystal field, tetragonal field, admixture coefficients and bonding parameters are evaluated, which suggest that the complex is fairly covalent in nature.

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Section: Introductionmentioning

confidence: 99%

Site determination of vanadyl impurity in cadmium sodium sulphate hexahydrate: single crystal EPR and optical studies

et al. 2006

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“…The present value 0.780 indicates partially covalent nature for the metal ligand bond. Hence, admixture of dx 2 -y 2 and dz 2 orbital and covalency contribute to the low magnitude of the Cu(II) hyperfine constant [26][27][28][29][30][31][32] .…”

Section: Optical Absorption Ftir and Powder Xrd Studies Of Cu(ii) Dop...mentioning

confidence: 99%

Structural Investigation of Cu(II) in Alkaline Salt of Bis(malonato)zincate(II) Anion Using Single Crystal EPR Technique

Geetha¹,

Parthipan²,

Sathya³

et al. 2013

Asian J. Chem.

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Electron paramagnetic resonance and optical absorption spectra of Cu(II) ion doped diaquacesiumaquabismalonatozincate have been carried out at room temperature using X band spectrometer to get information about the location of impurity and assigned structural properties. Single crystal rotated along the three crystal planes (a*c*, bc*, ab) suggesting the presence of single site copper impurity present in the lattice. The observed spectra have been fitted to spin Hamiltonian of rhombic symmetry with gxx = 2.1694, gyy = 2.137, gzz = 2.3304; Axx = 3.75, Ayy = 6.79 and Azz = 12.76 mT, respectively. From the direction cosines of principal g and A values propose that the copper present in the lattice interstitially in the host lattice. The analysis of powder spectrum also confirms the presence of only one site. Angular variation plots and power EPR spectrum have also been simulated. Optical, FTIR and powder XRD techniques have been used to confirm the structure of the host lattice in presence of dopant.

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Multifrequency Transition Ion Data Tabulation

Misra

Moncrieff

Diehl

2014

Multifrequency Electron Paramagnetic Resonance

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Effect of Jahn–Teller ion in zinc sodium sulphate hexahydrate: a case of low hyperfine coupling constant for Cu(II) ion

Cited by 10 publications

References 25 publications

Site determination of vanadyl impurity in cadmium sodium sulphate hexahydrate: single crystal EPR and optical studies

Site determination of vanadyl impurity in cadmium sodium sulphate hexahydrate: single crystal EPR and optical studies

Structural Investigation of Cu(II) in Alkaline Salt of Bis(malonato)zincate(II) Anion Using Single Crystal EPR Technique

Multifrequency Transition Ion Data Tabulation

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