Vol. 7 & Issue 3 ; Section C : Physical Sciences

Date : May 2017 to July 2017

 

Surface Active Properties of Some Bioactive Azole Series Complexes of Copper in Binary Solvent Mixture

Nisha Jain and Neha Mathur

JCBPS; Section C; May 2017 – July, 2017, Vol. 7, No. 3; 401-411.

[DOI: https:/doi.org/10.24214/jcbps.C.7.3.40111]

 

  • Abstract

    The importance of colloidal surfactants containing nitrogen and sulphur donor ligands in applied areas of research and many industrial processes cannot be under estimated. Colloido chemical behavior of complexes derived from copper (II) palmitate with substituted phenylthiourea and substituted 2-amino Benzothiazole in benzene-propanol mixture of varying composition has been investigated by viscometric measurement. The combination is found to posses fungicidal, insecticidal, pesticidal and nematocidal activities. The azole and azine ring compounds are very good pharmacological agents and can be used as antimalarial, antimotion sickness, antihistaminic and analgesic. The combination of copper soap and ligand makes complexes which are highly biodegradable and play important role in biological activities. The interaction of these N donor ligands with metal ion gives complexes of different geometries and literature survey reveals that these complexes are potentially more biologically active. Complexes of copper (II) palmitate with N-donor ligands were synthesized and characterized by their elemental analysis, metal weight, m.pt, IR and NMR spectral studies. Copper soaps due to their surface active properties play a vital role in various fields. Complexes containing copper palmitate show remarkable applications in industries and are used as emulsifiers, foaming and wetting agents and dispersing agents. In the present work benzene and propanol have been chosen as the cosolvent as mixed solvents have tendency to interact with complex molecules and affect the aggregation of complex molecules.

Synthesis and characterization of CuS nanocomposites by using alumina channel-technique

J.Maji  and K.Maji 

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 412-418,

[DOI: https://doi.org/10.24214/jcbps.C.7.3.41218]

 

  • Abstract

    CuS nanocomposites synthesized using Alumina crystallite as the medium. A core shell nanostructure developed by suitable oxidation of the composite. X ray diffraction (XRD) of synthesized CuS nanocomposites revealed the presence of two crystal structures: one is tetragonal and the other is monoclinic. All salient diffraction peaks can be closely matched to the monoclinic and tetragonal structures. The PL spectrum of the CuS nanopartic;les shows a peak centered at 410nm and 460 nm which is shorter than submicron CuS , indicating a CuS nanocrystals obtain in this work in quantum size. Materials exhibited good electrical and optical properties. Due to high dielectric constant and photo luminescence property this CuS nanocomposites can be used in different electronic and optical devices.

A theoretical study of electron transport through a quantum wire (QW) with a side quantum dots (QD’s) array and quantum point contacts (QPCs) and evaluation of conductance as a function of Fermi energy

MD. Faisal Hussain, Davendra Prasad and L. K. Mishra

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 419-430.

[DOI: https://doi.org/10.24214/jcbps.C.7.3.41930]

 

  • Abstract

    Using the theoretical formalism of P. A. Orellana et al. (Phys. Rev B67, 085321 (2003)), we have theoretically evaluated the conductance in the unit of (2e2/h) as a function of Fermi energy in the unit of Γ for N=1 to N=10 QD”s array. Our theoretically evaluated results indicate that as N increases the system develops an oscillating band. One observes N anti-resonances and N-1 resonance which arises due to hybridization of the quasi bound levels of QD’s and the coupling of the QW. This study also reveals an important fact that electron-electron interaction in this system is more effective. The main effect of this interaction is to shift and split the resonance position. Using the theoretical formalism of P. Havu etal [Phys. Rev. B70, 233308(2004)], we have also studied electron transport through QW and quantum point contacts. We observed that conductance of different length of QW as a function of gate voltage increases. This formalism is based on Density Functional Theory and Green’s function technique. Our theoretically evaluated results are in good agreement with the experimental data and also with other theoretical workers.