Calculation of spectral shifts in UV–visible region and photoresponsive behaviour of fluorinated liquid crystals: Effect of solvent and substituent

Praveen, P. Lakshmi; Ojha, Durga P.

doi:10.1016/j.matchemphys.2012.05.036

Cited by 21 publications

(3 citation statements)

References 40 publications

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“…So, they are limited to low frequency applications due to lower dielectric constant and capacitance losses at higher frequencies. The results show that the grown crystal having a good dielectric constant, resistance, and capacitance due to the L-proline doped with NaNO3 and KNO3 [21][22][23][24].…”

Section: Dielectric Studiesmentioning

confidence: 96%

Characterization of Pure and L-Proline Doped Potassium Nitrate and Sodium Nitrate Crystals

Velumani¹,

Paul

Haris

et al. 2022

Trends Sci

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The crystals of pure and L-Proline doped Potassium nitrate and Sodium nitrate were grown in solution by slow evaporation technique using supersaturated solution of the salts. Characterization studies of the crystals have been done to find the impact of the L-Proline on the regular lattice arrangement of the pure crystal. The Powder XRD spectrum reveals that the pure and doped KNO3 crystals belong to orthorhombic structure; and pure and doped NaNO3 are rhombohedral in nature. This is a unit cell with parameters a = b = c; α = β = γ ≠ 90°. There are small changes in the unit cell dimensions but the structure of the pure and doped crystals remain to be orthorhombic in nature. The FTIR spectrum shows the functional group analysis of the samples. The various decomposition process of the crystals with respect to temperature have been carried out in thermal analysis. The dielectric properties exhibit the variation of dielectric constant, and capacitance with frequency at various temperatures for pure and doped crystals. The doped crystals found to have considerable effect on the optical, thermal and dielectric properties. HIGHLIGHTS Effect of dopant L-Proline on the growth of Potassium nitrate and Sodium nitrate crystals by solution growth was carried out for the first time The studies based on dielectric properties and thermal analysis gives a broad understanding about the influence of the dopant on the pure crystals Variation of dielectric constant, resistance, and capacitance with respect to frequency at various temperatures reveals that the dopant L-Proline has a significant effect GRAPHICAL ABSTRACT

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Section: Dielectric Studiesmentioning

confidence: 96%

Characterization of Pure and L-Proline Doped Potassium Nitrate and Sodium Nitrate Crystals

Velumani¹,

Paul

Haris

et al. 2022

Trends Sci

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“…More speci cally, the absorption peak at 371 nm in ZnO nanoparticles is displaced to 375 nm in Glu-coated ZnO. The red shift is usually explained by functional groups that attract electrons [41], which ts with the fact that Glu was added to the surface of ZnO NPs.…”

Section: Cell Viability (\%) = ×100\%mentioning

confidence: 98%

Glutamic Acid-Coated Zinc Oxide Nanoparticles: Synthesis, Characterization, and Anticancer Activity

Huong,

Son,

Thanh

et al. 2024

Preprint

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This paper presents a method to enhance the compatibility of zinc oxide nanoparticles (ZnO NPs) produced from guava leaf extract by modifying the nanoparticle surface with L-glutamic acid. The Glu-coated ZnO material was subjected to characterization using Fourier transform infrared spectroscopy (FTIR), X-ray scattering spectroscopy (XRD), UV-Vis spectroscopy, and electron energy scattering spectroscopy (EDS). The results corroborated the attachment of glutamic acid to the surface of the nanoparticle. The thermal density analysis (TGA) results indicate that the Glu-coated ZnO material contains around 8.998% organic content. The morphology and size of nanoparticles were assessed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and dynamic light scattering spectroscopy (DLS) both before and after modification. The findings demonstrate that the bare ZnO nanoparticles had an average size of around 25.32 nm, but the Glu-coated ZnO nanoparticles measure 41.88 nm. Their zeta values are − 9.05 mVs and − 18.6 mV, respectively. The anti-cancer effect of ZnO nanoparticles coated with glutamic acid was evaluated on various cell lines including HeLa (cervical cancer), A549 (lung cancer), and MCF7 (breast cancer). The findings demonstrated a significant enhancement in the anti-cancer efficacy of ZnO NPs with the application of Glu coating on their surface. The IC50 values of Glu-coated ZnO for the Hela, A549, and MCF7 cancer cell lines are 40.43 µg/mL, 37.20 µg/L, and 44.23 µg/mL, respectively. The findings indicate that the utilization of Glu-coated ZnO material holds significant promise in the field of cancer treatment.

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“…In fact, many processes such as ET, spectral shift, and vibrational spectrum are intimately related to the so‐called nonequilibrium solvation phenomena in solution and the spectral shifts is a key quantity that has attracted most attention. Moreover, nonequilibrium solvation problem also exists in some other processes such as proton transfer …”

Section: Introductionmentioning

confidence: 96%

An overview of continuum models for nonequilibrium solvation: Popular theories and new challenge

2015

Int J of Quantum Chemistry

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The effect of solvent on the electron transfer (ET) and spectral shifts has been the focus of experimental and theoretical studies and a key quantity in these studies is the solvent reorganization energy. There are a number of theoretical models toward the evaluation of nonequilibrium solvation free energy that were proposed decades ago and have been applied widely. In the past decade, however, we revisited the original theoretical derivations and identified a serious defect in the popular nonequilibrium solvation models which causes the significant overestimation of solvent reorganization energy and hence predicts a much lowed rate constant for ET in some cases. A rigorous derivation by means of contrained equilibrium principle of thermodynamics was subsequently conducted for the study of nonequilibrium solvation. In this review, the author outlined the intimate interplays among the representative models and analyzed what the possible problem could be. The key idea presented in our recent papers was highlighted. The constrained equilibrium principle in classical thermodynamics and its application to the nonequilibrium solvation were detailed, and a few argumentative examples in literature were taken for the validation of our theory.

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Calculation of spectral shifts in UV–visible region and photoresponsive behaviour of fluorinated liquid crystals: Effect of solvent and substituent

Cited by 21 publications

References 40 publications

Characterization of Pure and L-Proline Doped Potassium Nitrate and Sodium Nitrate Crystals

Characterization of Pure and L-Proline Doped Potassium Nitrate and Sodium Nitrate Crystals

Glutamic Acid-Coated Zinc Oxide Nanoparticles: Synthesis, Characterization, and Anticancer Activity

An overview of continuum models for nonequilibrium solvation: Popular theories and new challenge

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