Structures and Electrical Properties of Some Biologically Active Nucleic Acid Constituents
Journal Title: Archives of Organic and Inorganic Chemical Sciences - Year 2018, Vol 3, Issue 5
Abstract
Zinc II, cadmium II and mercury II complexes derived from barbituric acid (BA), 5-nitrobarbituric acid (NBA), phenobarbital (PB) and 2-thiouracil (TU) were synthesized. The analytical results assigned the formation of complexes with the stoichiometries 1:1 and 1:2. The infrared spectral measurements assigned, and bands. The tetrahedral geometries are given for these complexes. The capacitance (CP) and the dielectric constant of the complexes are decreased with increasing the applied frequency and increased with increasing temperature. The behavior of the dielectric loss (”) indicated a polar polarization mechanism. The loss tangent (tan ) is decreased with increasing frequency and increased with increasing temperature while the impedance (Z) is mostly decreased with increasing both of frequency and temperature. Cole-Cole diagrams for the complexes at different temperatures reveal non-Debye type of the complexes. The relaxation time (t) for each relaxator becomes smaller as the temperature increases. In most complexes, the conductivity – temperature relationship is characterized by a phase transition temperature. Two pathways for the conduction of electricity may be expected at lower and upper temperature regions: n * and * transitions, respectively. The relative permittivity, dielectric loss and conductivity values for the complexes revealed semiconducting features based mainly on the hopping mechanism. The lower values of the activation energy (E) may be understood assuming that the metal ion forms a bridge with the ligands, thus facilitating the transfer of current carriers with some degree of delocalization in the excited state.
Authors and Affiliations
MS Masoud, MSh Ramadan, AH Elsayed, AM Sweyllam, MH Al Saify
Keywords
Related Articles
- EP ID EP603750
- DOI 10.32474/AOICS.2018.03.000172
- Views 55
- Downloads 0
Palauamine and Olympiadane Nano Molecules Incorporation into the Nano Polymeric Matrix (NPM) by Immersion of the Nano Polymeric Modified Electrode (NPME) as Molecular Enzymes and Drug Targets for Human Cancer Cells, Tissues and Tumors Treatment under Synchrotron and Synchrocyclotron Radiations
In the current editorial, we study Palau’amine and Olympiadane Nano molecules (Figures 1 & 2) incorporation into the Nano Polymeric Matrix (NPM) by immersion of the Nano Polymeric Modified Electrode (NPME) as molecular e...
A Review of Organotin Compounds: Chemistry and Applications
The field of organotin chemistry has a long history that started since 1849, when Frankland isolated a specimen of diethyltin diiodide [1]. In 1852, Lowich reported on the reaction of alkyl halides with a tin-sodium allo...
Thioglycosides and Cancer Prevention
Plant food contains numerous nutritional & anti-nutritional compounds, which prevents various non-communicable diseases such as cancer. This paper gives an overview of the cancer preventive effect of brassica. In recent...
Phytochemical and Antimicrobial Screening of the Leaves of Crotalaria Lachnosema Against Staphylococcus Aureus, Salmonella Typhi, Escherichia Coli and Klebsiella Pneumoniae
For many centuries, man explores and utilizes the natural endowment offered by both the species of flora and fauna to provide the basic necessity of life such as clothing, shelter, food and indeed health care. Medicinal...
Do Doubly Charged Monatomicanions Exist in Aqueous Solutions?
The chalcogenide atoms (X = oxygen, sulfur, selenium, tellurium, polonium) form doubly charged monatomic anions, X2-, which exist in crystalline salts. The question arises whether, once such salts are dissolved in water,...