A5017509963- Photochemistry and Electron Transfer Studies
- Free Radicals and Antioxidants
- Spectroscopy and Quantum Chemical Studies
- Optical Polarization and Ellipsometry
- Photochromic and Fluorescence Chemistry
- Liquid Crystal Research Advancements
- Synthesis and Reactivity of Heterocycles
- Molecular Junctions and Nanostructures
- Chemical Reactions and Mechanisms
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Chromatography
- Optical and Acousto-Optic Technologies
- Synthesis and Characterization of Heterocyclic Compounds
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Various Chemistry Research Topics
- Synthesis and biological activity
- Nonlinear Optical Materials Research
- Molecular spectroscopy and chirality
- Spectroscopy and Chemometric Analyses
- Click Chemistry and Applications
- Synthesis and Biological Evaluation
- Cyclopropane Reaction Mechanisms
- Advanced Sensor and Energy Harvesting Materials
- Photonic and Optical Devices
Alexandru Ioan Cuza University
2016-2025
Institute of Macromolecular Chemistry
2012
Romanian Academy
2011
Institutul de Chimie Macromoleculară Petru Poni
2011
Polyethylene terephthalate (PET) films are the subject of intensive research because great interest in using them applications, especially medicine. From an optical point view, PET with a low degree stretching can be considered uniaxial materials, for which determination linear birefringence and its dispersion is very important. Two methods were applied here estimation these parameters: ellipsometric method channeled spectra method. The uses monochromatic radiation; therefore, determined...
Binary solvent mixtures of the non-ionic surfactant Triton X-100 with water, methanol, ethanol, and 1-propanol, respectively, were investigated by solvatochromic studies. The absorption spectral bands methyl red dye, used as a probe, recorded in ternary solutions prepared different mole ratios between water/alcohols. Kamlet–Abboud–Taft model was applied to estimate contribution each type intermolecular interaction total shift electronic band solute. composition solute molecule’s first...
Transparent polymers are key materials for producing a broad category of optical components. For specific uses, the material needs additional adaptation its basic properties. In this context, current article is focused on applying two kinds treatments tailoring and morphological features low-density polyethylene to match criteria as retardation plates or band-pass filters. The first kind treatment involves combined mechanical stretching (at various degrees) abrasion. second type resides in...
Fluorescein sodium is a very important compound for wide spectrum of applications, from which medical applications prevail. Despite this, there are few studies in the literature related to structure and fundamental properties fluorescein its solutions, with most dealing fluorescein. The purpose present article determine some parameters molecule approaching quantum-mechanical modeling experimental solvatochromism both binary ternary solutions. For data analysis, several theoretical models...
Sudan derivatives are widely used as dyes for foods, textiles, plastics, paper, and cosmetics. The wavenumbers in the maximum of electronic absorption bands two solvents with varying physicochemical properties were correlated microscopic macroscopic parameters solution components. molecular excited state estimated using solvatochromic quantum-mechanical calculations.
This paper is dealing with the electromechanical properties of a synthesized polyurethane elastomer film-based polyester. On basis electrostatic-field induced strain, dielectric, and stress-strain measurements carried out under ambient conditions, parameters such as thickness apparent electrostrictive coefficient, effective pressure, mechanical energy density, Maxwell-effect contribution, were determined. Thickness strain versus static electric field showed quadratic dependence up to about...
Quercetin was subjected to a quantum-mechanical analysis and energetic electro-optic parameters were evaluated. A solvatochromic study used estimate the dipole moment of quercetin in excited state determine angle between moments this molecule electronic states responsible for visible absorption band. The contribution each type intermolecular interactions total spectral shift experimentally recorded solution also established study.
A simple method for determining the linear birefringence of thin layers based on determination orientation polarization ellipse totally polarized light is proposed and it applied to PVA foils. Theoretical notions experimental procedure are described. The polymer foils with different degrees stretching determined applicability discussed.
Solvent-induced effects on the π–π* electronic absorption band frequencies of some azobenzene derivatives are described in terms dipole–dielectric, solute–solvent, and hydrogen bonding interactions. A multiple linear regression equation for νmax was developed based polarizability–polarity parameters Kamlet–Taft solvatochromic parameters. Although polarizability is a major contributor to interactions solutions, related solvent polarity, bond acidity, basicity also statistically significant...
The results obtained both in quantum chemical computation and solvatochromic study of pyridinium di-carbethoxy methylid (PCCM) are correlated order to estimate the electric dipole moment excited state this molecule. This estimation is made by a variational method hypothesis that molecular polarizability does not change time absorption process. Ternary solutions PCCM protic binary solvents used here, establishing contribution each type interaction spectral shift characterize composition first...