Interaction of a proton with the fluorescein molecule in some binary solvents

1971 ◽  
Vol 14 (5) ◽  
pp. 681-683
Author(s):  
V. V. Kozlov ◽  
A. M. Sarzhevskii
Keyword(s):  
Binary Solvents ◽  
Fluorescein Molecule

Variational Method for Estimating the Dipole Moment in the Second Excited State of Fluorescein Molecule from its Electronic UV Absorption Spectra

2019 ◽  
Vol 70 (10) ◽  
pp. 3538-3544
Author(s):  
Alina Costina Luca ◽  
Ana Cezarina Morosanu ◽  
Irina Macovei ◽  
Dan Gheorghe Dimitriu ◽  
Dana Ortansa Dorohoi ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Excited State ◽  
Variational Method ◽  
Electronic State ◽  
Excited Electronic State ◽  
Spectral Band ◽  
Uv Absorption ◽  
Optical Parameters ◽  
Electrical Permittivity ◽  
Fluorescein Molecule

Electro-optical parameters of fluorescein molecule in the second excited electronic state and information on the interactions with solvents were obtained from a solvatochromic study. Parameters of the solvents such as the refractive index, electrical permittivity and Kamlet-Taft parameters (hydrogen bond acidity and basicity) were related with the experimentally recorded shifts of UV absorption spectral band of fluorescein dissolved in several solvents. Through a variational method, the electric dipole moment and polarizability in excited state of fluorescein molecule were estimated. The calculus requires some parameters of the fluorescein molecule in the ground electronic state, which were determined through a quantum-mechanical study.

A description of effect of composition of mixed binary solvents on processes in solutions

1988 ◽  
Vol 53 (4) ◽  
pp. 671-685 ◽  
Author(s):  
Oldřich Pytela ◽  
Miroslav Ludwig
Keyword(s):  
Gibbs Energy ◽  
Mixed Solvents ◽  
Theoretical Description ◽  
Energy Change ◽  
Binary Solvents ◽  
Gibbs Energy Change ◽  
Order Model ◽  
Significant Difference

A theoretical description of the effect of changed composition of mixed solvents on processes in solutions has been suggested on the basis of the proportionality between the Gibbs energy change of the process and that of the solvent due to the transition from pure components to the mixture. The additional Gibbs energy has been expressed by means of the so-called classical functions by Margules, van Laar-Wohl, and van Laar-Null. The application to 115 various processes (pK, IR, UV-VIS, NMR, log k, and others) has confirmed that the theoretical presumptions are justified, the most suitable being Margules' 4th order model which shows a statistically significant difference from the models of lower orders.

Study on the solid-liquid equilibrium of l-malic acid in binary solvents

2021 ◽  
Vol 325 ◽  
pp. 115113
Author(s):  
Zhicheng Gao ◽  
Ying Li ◽  
Xunqiu Wang
Keyword(s):  
Malic Acid ◽  
Binary Solvents ◽  
Liquid Equilibrium ◽  
Solid Liquid

Solubility and thermodynamic analysis of musk ketone in four binary solvents from T= (273.15 to 313.15) K

2021 ◽  
Vol 329 ◽  
pp. 115415
Author(s):  
Yuwei Hua ◽  
Genlei Wei ◽  
Shishuai Shi ◽  
Chunmei Cao ◽  
Xuening Zhang ◽  
...  
Keyword(s):  
Thermodynamic Analysis ◽  
Binary Solvents

Determination and correlation solubility of m-phenylenediamine in (methanol, ethanol, acetonitrile and water) and their binary solvents from 278.15 K to 313.15 K

2019 ◽  
Vol 27 (5) ◽  
pp. 1149-1158 ◽  
Author(s):  
Pengbao Lian ◽  
Huipeng Zhao ◽  
Jianlong Wang ◽  
Lizhen Chen ◽  
Yong Xiang ◽  
...  
Keyword(s):  
Binary Solvents
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