Application of the hard and soft acids and bases concept to explain ligand coordination in double salt structures

Balarew, Chr.; Duhlev, Rumen

doi:10.1016/0022-4596(84)90240-8

Cited by 430 publications

(122 citation statements)

References 25 publications

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“…It is suggested that LSMH crystal shows low frequency dispersion (LFD) or the quasi-DC process (QDC) behavior because of absence of any loss peak in the dielectric dispersion [53]. The lower values of dielectric loss with higher frequencies for this crystal suggest that the material possesses enhanced optical quality with lesser defects and this parameter is of vital importance for nonlinear optical materials and their application [54].…”

Section: Variation Of Dielectric Constant and Dielectric Loss With Frmentioning

confidence: 96%

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Najar

Vakil

Want

2017

Materials Science-Poland

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Optical, dielectric, and thermal properties of lithium sulphate monohydrate crystals grown by slow evaporation method have been studied. The crystal structure was resolved by direct methods using single crystal X-ray diffraction data collected at room temperature and refined by full-matrix least-squares procedures to a final R-value of 0.0174. Plasma energy, Penn gap, Fermi energy and electronic polarizability of the grown crystal were calculated from single crystal XRD data. The electronic polarizability of lithium sulfate monohydrate was also calculated and compared with the theoretical data using Clausius-Mossotti equation. Optical band gap calculated from optical data for the grown crystal is 4.49 eV. Fourier Transform Infrared Spectroscopy study confirmed the presence of water in the crystal structure. The AC conductivity, dielectric constant and dielectric loss of the grown crystal were systemically investigated, showing a peak at about 130°C which could be attributed to the water molecules in the crystal structure. The anomalous dielectric properties shown by the crystal have been correlated with its thermal behavior. The title crystal obeys Jonscher's power law relation; σ(ω) = σ o + Aω s , with temperature dependent exponent s < 1. The activation energy calculated for the material is 0.24 eV and suggests protonic conduction by hopping mechanism in addition to cationic conduction by lithium ions. The micro-indentation study was also carried out which revealed that the crystal belongs to a category of soft materials.

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Section: Variation Of Dielectric Constant and Dielectric Loss With Frmentioning

confidence: 96%

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Najar

Vakil

Want

2017

Materials Science-Poland

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“…In accordance with Miller rule, the lower value of dielectric constant at higher frequencies is a suitable parameter for the enhancement of SHG coefficient [19]. The low value of dielectric loss at high frequency reveals the high optical quality of the crystal with lesser defects, which is the desirable property for NLO applications [20]. The dielectric constant of dispersive medium decreases because the term contributing todielectric constant from iondipole interactions is compensated by the thermal energy leading to the relaxation of polarization [21].…”

Section: Dielectric Response Of Lppc Crystalmentioning

confidence: 75%

Nucleation kinetics and dielectric characterization of L-Proline Potassium Chloride (LPPC) single crystals

Kumari¹,

Selvarajan²

2017

IOSR JAP

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“…The low dielectric loss at high frequency reveals the high optical quality of the crystal with lesser defects, which is a desirable property of NLO applications [19,20] dielectric constant and dielectric loss decrease with the increasing frequency. This may be due to the contributions of all the four polarizations such as electronic, ionic, orientation, and space charge, which are predominant in the lower frequency region [21].…”

Section: Dielectric Studymentioning

confidence: 99%

Growth and Charactersation of L-Serine Doped Pottassium Dihydrogen Phosphate Crystal

Manimekalai¹,

Rajasekaran²

2017

IJERT

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Abstract-Potassium dihydrogen phosphate is a material rich in NLO property with wide range of industrial applications. Certain Amino acids are also rich in NLO properties so they are used as dopants.In the present work LSerine a non essential amino acid is added in the ratio 1:1 molar percentage to KDP. Single crystals were grown by slow evaporation method. The grown crystals were characterized by powder X-ray diffraction, Single crystal X-Ray diffraction, UVvis-spectroscopy, Fourier transform infrared spectroscopy (FTIR), SHG efficiency and dielectric studies, The single crystal X-ray diffraction studies reveal the structure and space group of the crystal. The powder X-ray diffraction study shows that the crystalline perfection of grown crystal is good. Fourier transform infrared studies confirm the functional groups of the crystals. It is seen from UV-vis studies that the optical transparency is found to increase much by adding chlorides. SHG efficiency of KDP is found to be slightly increasing with doping of L-Serine.The electrical properties of the crystal have been studied using dielectric constant studies. All the results are compared with the results of pure KDP.

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Application of the hard and soft acids and bases concept to explain ligand coordination in double salt structures

Cited by 430 publications

References 25 publications

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Nucleation kinetics and dielectric characterization of L-Proline Potassium Chloride (LPPC) single crystals

Growth and Charactersation of L-Serine Doped Pottassium Dihydrogen Phosphate Crystal

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