Biological approach of zinc oxide nanoparticles formation and its characterization

Singh, Ravindra Pratap; Shukla, Vibha; Yadav, Raghvendra Singh; Sharma, Prashant K.; Singh, Prashant Kumar; Pandey, Avinash C.

doi:10.5185/amlett.indias.204

Cited by 317 publications

(249 citation statements)

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“…The ligand and its metal complexes have dye character due to the high molar extinction constant. SCHEME 2 Preparation of the complexes assignable [27][28][29] to υ(C = N) and υ(N = N), respectively. This shifting indicates that the coordination of azomethine nitrogen to metal ion,, [30][31][32] these bands were shifted to the lower frequencies by 23-19 and 20-6 cm −1 in the spectra of the complexes (Table 2, Supporting Information).…”

Section: Microbiological Investigationsmentioning

confidence: 99%

A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

Zoubi

Al‐Hamdani

Ahmed

et al. 2017

Applied Organom Chemis

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A new Azo-Schiff base ligand L was prepared by reaction of m-hydroxy benzoic acid with (Schiff base B) of 3-[2-(1H-indol-3-yl)-ethylimino]-1.5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol-4-ylamine. This synthesized ligand was used for complexation with different metal ions like Ni(II), Co(II), Pd(II) and Pt(IV) by using a molar ratio of ligand: metal as 1:1. Resulted compounds were characterized by NMR ( 1 H and 13 C), UV-vis spectroscopy, TGA, FT-IR, MS, elemental analysis, magnetic moment and molar conductivity studies. The activation thermodynamic parameters, such as ΔE*, ΔH * , ΔS * , ΔG * and K are calculated from the TGA curves using Coats-Redfern method. Hyper Chem-8 program has been used to predict structural geometries of compounds in gas phase. The biological activities of Schiff base and its complexes had been tested in vitro against, two Gram positive bacteria (Bacillus subtillis and Staphylococcus aureus) and two Gram negative bacteria (Escherichia coli and Pseudomonas aeruguinosa).

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Section: Microbiological Investigationsmentioning

confidence: 99%

A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

Zoubi

Al‐Hamdani

Ahmed

et al. 2017

Applied Organom Chemis

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“…Citrus aurantifolia extract 19 , Aloe vera leaf extract 20 and milky latex of Calotropis procera 21 are used as biomaterials for ZnO NPs synthesis. The secondary metabolites present in the plant extract promote and stabilize the NP formation 22 by acting as capping agent to prevent agglomeration 23 . The present study was designed in a simple, cost-effective, eco-friendly manner to synthesize ZnO NPs at an ambient condition using C. roseus leaf extract as reducing and stabilizing agent.…”

mentioning

confidence: 99%

<i>Catharanthus roseus</i>-Mediated Zinc Oxide Nanoparticles against Photocatalytic Application of Phenol Red under UV@365 nm

Kalaiselvi¹,

Roopan²,

Madhumitha³

et al. 2016

Current Science

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“…Using LSDA exchange correlation functional with U value equal to 2.75 eV, the calculated energy gap for spin-dn channel is found to be ∼50 meV, which is ∼100 times smaller than that of estimated energy gap (∼0.5 eV) of LaCoO 3 compound with same U value. 39 At Γ point in the VB, the bands 2 and 3 are doubly degenerate and this degeneracy get lifted along the Γ-FB and Γ-L directions. The temperature dependent Seebeck coefficient (α) and electrical conductivity per unit relaxation time (σ/τ ) for both spin channels are shown in the Fig.…”

Section: +mentioning

confidence: 99%

“…The temperature dependent Seebeck coefficient (α) measurement was carried out by using home made setup. 34 We have studied the electronic and thermoelectric properties of compound using the full potential linearized augmented plane-wave (FP-LAPW) method implemented in WIEN2k code in combination with the BoltzTraP code. 35,36 We have used the exchange correlation function within local density approximation (LSDA) of Perdew and Wang.…”

Section: Experimental and Computational Detailsmentioning

confidence: 99%

An important role of temperature dependent scattering time in understanding the high temperature thermoelectric behavior of strongly correlated system: La_0.75Ba_0.25CoO₃

Singh

Kumar

Pandey

2017

J. Phys.: Condens. Matter

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In the present work, we have reported the temperature dependent thermopower (α) behavior of La0.75Ba0.25CoO3 compound in the temperature range 300-600 K. Using the Heikes formula, the estimated value of α corresponding to high-spin configuration of Co 3+ and Co 4+ ions is found to be ∼16 µV/K, which is close to the experimental value, ∼13 µV/K, observed at ∼600 K. The temperature dependent TE behavior of the compound is studied by combining the WIEN2K and BoltzTrap code. The self consistency field calculations show that the compound have ferromagnetic ground state structure. The electronic structure calculations give half metallic characteristic with a small gap of ∼50 meV for down spin channel. The large and positive value for down spin channel is obtained due to the unique band structure shown by this spin channel. The temperature dependent relaxation time for both the spin-channel charge carriers is considered to study the thermopower data in temperature range 300-600 K. An almost linear values of τup and a non-linear values of τ dn are taken into account for evaluation of α. By taking the temperature dependent values of relaxation time for both the spin channels, the calculated values of α using two current model are found to be in good agreement with experimental values in the temperature range 300-600 K. At 300 K, the calculated value of electrical conductivity by using the same value of relaxation time, i.e. 0.1 ×10 −14 seconds for spin-up and 0.66 ×10 −14 seconds for spin-dn channel, is found to be equal to the experimentally reported value.

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Biological approach of zinc oxide nanoparticles formation and its characterization

Cited by 317 publications

References 0 publications

A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

<i>Catharanthus roseus</i>-Mediated Zinc Oxide Nanoparticles against Photocatalytic Application of Phenol Red under UV@365 nm

An important role of temperature dependent scattering time in understanding the high temperature thermoelectric behavior of strongly correlated system: La_0.75Ba_0.25CoO₃

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Biological approach of zinc oxide nanoparticles formation and its characterization

Cited by 317 publications

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A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

A new azo‐Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes

<i>Catharanthus roseus</i>-Mediated Zinc Oxide Nanoparticles against Photocatalytic Application of Phenol Red under UV@365 nm

An important role of temperature dependent scattering time in understanding the high temperature thermoelectric behavior of strongly correlated system: La0.75Ba0.25CoO3

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An important role of temperature dependent scattering time in understanding the high temperature thermoelectric behavior of strongly correlated system: La_0.75Ba_0.25CoO₃