Showing papers by "G. Vinitha published in 2022"
TL;DR: In this article , the authors used density functional theory (DFT/B3LYP) method with 6-31G (d,p) basis set to calculate geometries and vibrational frequencies of N-2(methoxy phenyl)acetamide(N2MPA) in the ground state.
10 citations
TL;DR: In this article , single crystals of Piperazinedi-ium tetrakis (μ2-chloro)-diaqua-dichloro-di-cadmium(ii), a three-dimensional framework of chained chlorocadmate with the organic piperazine as a template, are synthesized by slow evaporation and confirmed by single-crystal X-ray diffraction.
6 citations
TL;DR: In this article , the synthesis and activity of magnetic BiFe1-xCoxO3 (x = 0, 0.025, 0., 0.075 and 0.10) photocatalysts under visible light irradiation is reported.
6 citations
TL;DR: In this article , the third order nonlinear optical properties of Ni doped ZnMoO4 nanostructures with various concentration of Ni were investigated and it was suggested that the optical properties could be controlled by Ni doping making them a potential candidate for optical device applications.
6 citations
TL;DR: In this paper , Ni-doped copper oxide nanostructures have been synthesized using the modified auto-combustion method and the structural, morphological, vibrational, linear, and nonlinear optical properties were examined.
5 citations
TL;DR: In this article , the influence of defects on the optical and nonlinear optical properties of nanoparticles is revealed from investigations on pristine and nickel doped zinc oxide nanoparticles (Zn(1 − x)NixO).
5 citations
TL;DR: A single crystal of Pyridine-1-ium-2-carboxylatehydrogenbromide (PHBr) was grown using the Slow Evaporation Solution Technique as discussed by the authors .
5 citations
TL;DR: The synthesis and crystal growth of the new cocrystal, Pyridinium-4-carbohydrazide 2,4,6- trinitrophenolate (PCTNP), has been carried out by solution growth technique as mentioned in this paper .
5 citations
TL;DR: A supramolecular assembly of Morpholin-4-ium hydroxy(diphenyl)acetate (MHA) was synthesized by acquiring morpholine and benzilic acid in equimolar ratio via solvent vaporization technique using methanol as a solvent.
4 citations
TL;DR: A new cocrystal, Pyridine-4-carbohydrazide bis(4-hydroxynitrobenzene) (PCBHNB) has been synthesized and single crystals grown via one-pot slow evaporation method as mentioned in this paper.
4 citations
TL;DR: Pristine NiO and 2% Cr doped NiO nanostructures are successfully synthesized by the modified auto-combustion method for the determination and improvement of linear and nonlinear optical behaviours, and for identifying them as suitable materials for optical limiting applications as mentioned in this paper .
TL;DR: In this article , structural and morphological properties, vibrational spectra and optical properties (linear and nonlinear) of pristine and Co-doped V2O5 nanoparticles are investigated.
TL;DR: In this paper , the third order nonlinear optical properties of barium (Ba) doped cobalt molybdate (CoMoO4) nanostructures, synthesized through chemical precipitation method, have been studied.
01 Apr 2022
TL;DR: In this article , BaZrO3 was chemically synthesized using liquid NH3 as precipitating agent and green synthesised using Moringa oleifera leaf extract without the addition of liquid NH 3. X-ray diffractograms confirmed the cubic nature of the samples with preferential growth.
Abstract: In this paper, BaZrO3 was chemically synthesized using liquid NH3 as precipitating agent and green synthesized using Moringa oleifera (M. oleifera) leaf extract without the addition of liquid NH3. X-ray diffractograms confirmed the cubic nature of the samples with. (1 1 0) preferential growth. XPS studies ascertain the existence of Ba, Zr and O in the green synthesized sample. Decreased band gap was observed for the green synthesized sample. Ba-O stretching vibrations were observed respectively at 480 and 487 cm−1 for the chemically synthesized and green synthesized samples. The green synthesized BaZrO3 exhibits better degradation efficiency of 84.1% after 90 min against CR dye. The green synthesized BaZrO3 nanoparticles exhibited excellent antimicrobial activity against E. coli and A. terreus. The third order nonlinear absorption coefficient and susceptibility values of the green synthesized BaZrO3 were found to be equal to 3.05 × 10−6 cm/W and 4.67 × 10−8 esu, respectively.
TL;DR: In this article , the synthesis of Cr3+ doped PbWO4 nanoparticles with different concentration of Cr 3+ through chemical method was reported, and the structural, morphological and optical characterization was studied through X-ray diffraction (XRD), Raman, UV-Visible spectra, Photoluminescence, Xray photo electron spectroscopy (XPS) and Transmission electron Microscopy (HR-TEM).
TL;DR: In this article , a single crystal hexamethylenetetramine 4-nitrophenol monohydrate (HMTNP) was grown using solvent evaporation and the single crystal X-ray diffraction was used to confirm the crystal lattice parameters and space group.
TL;DR: In this paper , a triclinic system with space group Pnma was discovered by single crystal X-ray analysis and obtained optical band gap energy 3.71 eV from UV-Vis-NIR.
TL;DR: In this paper , single crystals of hexamethylenetetetraminium hydrogen dl -malate (HMTM) have been successfully synthesized by slow evaporation method and structurally analyzed by single crystal X-ray diffraction, powder X ray diffraction and FTIR, FT-Raman, 1 H and 13 C NMR spectroscopic techniques.
TL;DR: In this paper , single crystals of the newly concocted 2-amino-6-methyl pyridine-1-ium 2-carboxy-6nitro benzoate (MPNP) were grown by slow evaporation approach using an equimolar ethanol-water mixed solvent.
TL;DR: In this article , a single crystal of l-phenylalanine l-phylalaninininum malonate (LPPMA) was synthesized by slow evaporation and was subjected to nonlinear optical examination and physio-chemical characterization.
Abstract: A single crystal of l-phenylalanine l-phenylalanininum malonate (LPPMA) was synthesized by slow evaporation and was subjected to nonlinear optical examination and physio-chemical characterization. Studies on single X-ray diffraction confirm the arrangement of monoclinic space group P21 which is a vital criterion for the NLO phenomenon. The assessment of functional groups and diverse vibration modes responsible for the characteristics of the material was performed with an FTIR analysis. The UV-visible spectral examination found the wavelength of UV-cutoff at 233 nm and various optical parameters were evaluated. The mechanical strength and different criteria associated with it were assessed. The electric field response of the material was examined in terms of the dielectric constant, dielectric loss, ac conductivity and activation energy. The spectra of emission were detailed. The efficacy of second harmonic generation was studied. The parameters of nonlinearity were investigated to analyse the third-order acentric optical response in the LPPMA by Z-scan procedure.
TL;DR: Two host-guest supramolecular complexes such as (18crown-6)-2(5-nitroisophthalic acid monomethyl ester).2(H2O) (I) and (15-crown 6)-2 (trimesic acid) (II) were synthesized from ethanol-water (2:3, v/v) mixed solvent system as discussed by the authors .
TL;DR: In this paper , the host-guest supramolecular complexes [2(6-HPCH) 2+ .3(18C6)].4[ClO 4 ¯].2(H 2 O) (I) and [(PDA) 2 + .2(18c6)].2[Cl¯].10(H2 O)(II) were derived by single-crystal X-ray diffraction analysis.
TL;DR: In this article , a novel crystal melaminium cyanoacetate (MLCA) has been synthesized and described in virtue of single crystal x-ray diffraction and UV-Vis, FT-IR and FT-Raman techniques.
TL;DR: In this paper, Butyl para-hydroxybenzoate (BHB) crystal is grown by solvent evaporative method and the structure and unit cell parameters of BHB crystal are analyzed by the single-crystal XRD.
TL;DR: In this article , the experimental results on structural, mechanical, thermal, linear, and third order nonlinear optical properties of an organic material 4-methyl-N-((1-(4-methylbenzoyl)piperidin-4-yl)methyl)-benzamide (1) for an efficient optical limiting application with easy preparation and decent performance are presented.
Abstract: The computation and experimental results on structural, mechanical, thermal, linear, and third order nonlinear optical properties of an organic material 4-methyl-N-((1-(4-methylbenzoyl)piperidin-4-yl)methyl)-benzamide (1) for an efficient optical limiting application with easy preparation and decent performance are presented. Its response to single-crystal x-ray diffraction allowed to investigate the molecular structure of 1, which is optimized using computational density functional theory at the B3LYP/6-311G** level. Calculated frontier molecular orbitals and Mulliken charge are served to realize the intramolecular charge transfer in 1 and its electronegative nature responsible for optical nonlinearity. Hirshfeld analysis investigated the structural property and the magnitude of interatomic and molecular interactions to help understand structure-property relation. The FTIR and NMR spectroscopic study further confirmed the formation of 1 and the vibrational states of its functional group. The title crystal showed acceptable thermal (stable up to 130 °C) and mechanical (stable up to 50 grams of applied load) stability, which is optimal for laser device applications. With an optical bandgap of 4.32 eV, the title material possesses much less linear optical absorption across the visible region of the electromagnetic spectrum. The nonlinear optical absorption (β), nonlinear refractive index (n 2) and third-order nonlinear optical susceptibility (χ (3)) values are measured as (0.0139 ± 0.001) × 10−4 cmW−1, (1.49 ± 0.05) × 10−10 cm2W−1 and (4.2 ± 0.3) × 10−8 esu respectively shows that the title molecule is third-order nonlinear optical active. The onset optical limiting threshold value is determined as (7.092 ± 0.01)×103 Wcm−2 for 532 nm, continuous-wave laser irradiation indicating that the title material is a good candidate for the optical limiting application.