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| 005 | 20250310102101.0 | ||
| 008 | 250310b |||||||| |||| 00| 0 eng d | ||
| 022 | _a09743626 | ||
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_aMSU _bEnglish _cMSU _erda |
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| 050 | 0 | 0 | _aQD31 JOU |
| 100 | 1 |
_aRasidgazi, Harun Al _eauthor |
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| 245 | 1 | 0 |
_aSolvent sorting in (mixed solvent + electrolyte) systems: Time-resolved fluorescence measurements and theory / _ccreated by Harun Al Rasidgazi, Hemant K Kashyap and Ranjit Biswas |
| 264 | 1 |
_aBangalore : _bSpringer, _c2015. |
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| 336 |
_2rdacontent _atext _btxt |
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| 337 |
_2rdamedia _aunmediated _bn |
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| 338 |
_2rdacarrier _avolume _bnc |
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| 440 |
_aJournal of chemical sciences _vVolume 127, number 1, |
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| 520 | _aIn this manuscript we explore electrolyte-induced modification of preferential solvation of a dipolar solute dissolved in a binary mixture of polar solvents. Composition dependence of solvation characteristics at a fixed electrolyte concentration has been followed. Binary mixtures of two different polarities have been employed to understand the competition between solute-ion and solute-solvent interactions. Time-resolved fluorescence Stokes shift and anisotropy have been measured for coumarin 153 (C153) in moderately polar (ethyl acetate + 1-propanol) and strongly polar (acetonitrile + propylene carbonate) binary mixtures at various mixture compositions, and in the corresponding 1.0 M solutions of LiClO4. Both the mixtures show red shifts in C153 absorption and fluorescence emission upon increase of mole fraction of the less polar solvent component in presence of the electrolyte. In addition, measured average solvation times become slower and rotation times faster for the above change in the mixture composition. A semi-molecular theory based on solution density fluctuations has been developed and found to successfully capture the essential features of the measured Stokes shift dynamics of these complex multi-component mixtures. Dynamic anisotropy results have been analyzed by using both Stokes-Einstein-Debye (SED) and Dote-Kivelson-Schwartz (DKS) theories. The importance of local solvent structure around the dissolved solute has been stressed. | ||
| 650 |
_aMixed solvent systems _vElectrolyte solutions _xDynamic fluorescence measurements |
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| 700 | 1 |
_aKashyap, Hemant K. _eco author |
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| 700 | 1 |
_aBiswas, Ranjit _eco author |
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| 856 | _uhttps://doi.org/10.1007/s12039-014-0750-5 | ||
| 942 |
_2lcc _cJA |
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| 999 |
_c169214 _d169214 |
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