AIE Based Coumarin Chromophore - Evaluation and Correlation Between Solvatochromism and Solvent Polarity Parameters

2015 ◽  
Vol 26 (2) ◽  
pp. 497-511 ◽  
Author(s):  
Sandip K. Lanke ◽  
Nagaiyan Sekar
Keyword(s):  
Solvent Polarity ◽  
Polarity Parameters

Solvent Polarity Studies of the Water+t-Butyl Alcohol and Water+t-Butylamine Binary Systems With the Solvatochromic Dyes Nile Red and Pyridinium-N-phenoxide Betaine, Refractometry and Permittivity Measurements

1994 ◽  
Vol 47 (9) ◽  
pp. 1771 ◽  
Author(s):  
PK Kipkemboi ◽  
AJ Easteal
Keyword(s):  
Binary Systems ◽  
Hydrophobic Interactions ◽  
Nile Red ◽  
Solvent Polarity ◽  
Butyl Alcohol ◽  
Linear Functions ◽  
Non Linear ◽  
Organic Cosolvent ◽  
Two Parameters ◽  
Polarity Parameters

The empirical solvent polarity parameters ENR and ET for the solvatochromic compounds Nile Red (1) and pyridinium-N-phenoxide betaine (2), respectively, have been determined as a function of composition for water+t -butyl alcohol and water+t-butylamine binary mixtures, over the whole composition range at 298 K. For both systems the two parameters vary with composition in a strongly non-linear fashion, and the polarity of the mixture decreases with increasing proportion of the organic cosolvent. The non-linear variation of the polarity parameters is attributed to water-cosolvent hydrophobic interactions at low cosolvent contents, and hydrogen-bonding interactions at higher cosolvent contents. Permittivity and refractive index have also been measured at 298 K for both systems, and both properties are strongly non-linear functions of composition.

scholarly journals Synthesis photophysical studies of some furfurylnitrones: high-ly selective chemosensors for Zn2+ and DFT studies

2018 ◽  
Vol 6 (1) ◽  
pp. 37 ◽  
Author(s):  
Ezhumalai Dhineshkumar ◽  
Mathivanan Iyappan ◽  
Rajendran Ganapathi ◽  
Chinnadurai Anbuselvan
Keyword(s):  
Molecular Structure ◽  
Solvent Polarity ◽  
Zinc Ion ◽  
Dft Studies ◽  
Fluorescence Sensing ◽  
1H And 13C Nmr ◽  
Ft Ir ◽  
Photophysical Studies ◽  
Polarity Parameters ◽  
Electronic Ground

New aldonitrones(1-4) were synthesized and characterized by UV-vis, fluorescence, FT-IR, 1H and 13C NMR spectral analyses. The absorption and fluorescence sensing spectra of the compounds were precise in different polarity of solvent. The solvent polarity parameters have been used to propose a quantitative approach towards the reliable stability of the electronic ground and excited state species. Photochemical behaviors of the compounds were analyzed by applying multi-linear correlation methods. The characterized compounds 1-4 show a chemosensing detection of zinc ion in aqueous solution. Besides, the fluorescence spectroscopic responses were reversible when the Zn2+chelating reagentEDTANa2.The phenomenon proves that these compounds to show a sensitivity “on-off” sensor for Zn2+.Further, to recognize the molecular structure, electronic and optical properties and DFT calculations of the molecules were formed.

Intermolecular interactions in water + acetonitrile mixtures : Evidence from the composition variation of solvent polarity parameters

1981 ◽  
Vol 34 (5) ◽  
pp. 943 ◽  
Author(s):  
S Balakrishnan ◽  
AJ Easteal
Keyword(s):  
Intermolecular Interactions ◽  
Structural Model ◽  
Solvent Polarity ◽  
Electrolyte Mixtures ◽  
Composition Variation ◽  
Polarity Parameter ◽  
Polarity Parameters

The dependence on composition of the polarity of H2O+MeCN mixtures has been determined from measurements of the empirical solvent polarity parameter ET. ET has been found to vary with composition in a similar fashion to that which has been reported previously for most other H2O+non-electrolyte mixtures for which ET data are available. The variation of ET with composition is interpreted in terms of the Naberukhin-Rogov structural model for H2O+nonelectrolyte mixtures.

scholarly journals Prediction of Solvatochromic Polarity Parameters for Aqueous Mixed-Solvent Systems

2020 ◽  
Vol 10 (23) ◽  
pp. 8480
Author(s):  
Alif Duereh ◽  
Amata Anantpinijwatna ◽  
Panon Latcharote
Keyword(s):  
Predictive Model ◽  
Mixed Solvent ◽  
Solvent Polarity ◽  
Aqueous Mixtures ◽  
Hydrogen Bond Donor ◽  
Ideal Model ◽  
Solvent Systems ◽  
Relationship Of ◽  
Electronic Transition Energy ◽  
Polarity Parameters

Solvent polarity is important data being used in solvent selections for preliminary engineering design of chemical processes. In this work, a predictive model is proposed for estimating the solvatochromic polarity of electronic transition energy (ET) of Reichardt indicator for aqueous mixtures. To validate the model, the ET values of eighteen aqueous mixtures collected from the literature were used. The predictive model provided a good estimation of ET values with an overall deviation of 2.1%, compared with an ideal model (5.1%) from the mole fraction average. The linear relationship of the contribution factor of hydrogen bond donor interactions (CFHBD) in the predictive model with Kamlet–Taft acidity was newly proposed in order to extend the model for other aqueous mixtures. The predictive model is applicable to many aqueous mixtures and simply requires three properties of pure components as: (i) ET values, (ii) gas-phase dipole moment and (iii) Kamlet–Taft acidity.

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