Preferential solvation in mixed binary solvents by ultraviolet–visible spectroscopy: N-ethyl-4-cyanopyridinium iodide in alcohol–acetone mixtures

1991 ◽  
Vol 87 (4) ◽  
pp. 587-589 ◽  
Author(s):  
Prasanta Chatterjee ◽  
Sanjib Bagchi
Keyword(s):  
Preferential Solvation ◽  
Binary Solvents ◽  
Visible Spectroscopy

scholarly journals Magnetic field effect on exciplex-forming organic acceptor/donor system: a powerful tool for understanding the preferential solvation

2016 ◽  
Vol 19 (3) ◽  
pp. 65-75
Author(s):  
Hao Minh Hoang ◽  
Van Thi Bich Pham
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Preferential Solvation ◽  
Magnetic Field Effect ◽  
Solvation Shell ◽  
Dielectric Constants ◽  
Binary Solvents ◽  
Charge Transfer Complexes ◽  
Solvent Mixtures ◽  
Magnetic Field Effects

Many acceptor/donor systems can form excited-state charge-transfer complexes (exciplexes) in photo-induced electron transfer reactions. Exciplex can be detected by their luminescence. In addition, the exciplex luminescence is magneto-sensitive. Here, we employ an approach based on the magnetic field effect on the exciplex of 9,10- dimethylanthracene/N,N-dimethylaniline pair in micro-homogeneous and micro-heterogeneous binary solvents to investigate the effects of the preferential solvation processes on solute molecules in solutions. Micro-homogeneous solvent mixtures of propyl acetate (PA)/butyronitrile (BN) allow for a systematic variation of the static dielectric constants, s , in the range from 6.0 to 24.6. The mixtures of toluene (TO)/dimethylsulfoxide (DMSO) with varying the s values in the range from 4.3 to 15.5 are used as micro-heterogeneous binary solvents. In micro-heterogeneous environment, DMSO molecules get preferentially favoured in the solvation shell, forming micro-clusters surrounding the solute molecules. This solvation effect is reflected in the altered magnetic field effects, lifetimes and dissociation rate constants of the exciplexes.

UV–VIS spectroscopic study of preferential solvation in mixed binary solvents at various temperatures

1996 ◽  
Vol 92 (9) ◽  
pp. 1499-1502 ◽  
Author(s):  
Ashis Kumar Laha ◽  
Parimal Kumar Das ◽  
Debashis Banerjee ◽  
Sanjib Bagchi
Keyword(s):  
Spectroscopic Study ◽  
Preferential Solvation ◽  
Binary Solvents

Solvatochromic Study on Binary Solvent Mixtures with Ionic Liquids

2008 ◽  
Vol 63 (7-8) ◽  
pp. 505-512 ◽  
Author(s):  
Mihkel Koel
Keyword(s):  
Ionic Liquids ◽  
Preferential Solvation ◽  
Nile Red ◽  
Binary Solvent ◽  
Solvent Mixtures ◽  
Nonlinear Behaviour ◽  
Visible Spectroscopy ◽  
Solvation Model ◽  
Highly Nonlinear ◽  
Uv Visible

Solvent effects on 2,6-dichloro-4-(2,4,6-triphenyl-pyridinium-1-yl)phenolate [ET (33) dye] and 7- diethylamino-3,4-benzophenoxazine-2-one (Nile Red) in binary mixtures of organic solvents (acetone, acetonitrile, propylene carbonate, methanol and ethane-1,2-diol) with 1,3-dialkyl imidazoliumbased ionic liquids were studied by UV-visible spectroscopy. Highly nonlinear behaviour of mixtures of alcohols and ionic liquids was found. A preferential solvation model was applied to the data obtained on solvatochromic shifts over the entire mixing range. It is fitting the data well for alcohol mixtures and for other solvent mixtures with different ionic liquids.

Sign in / Sign up

Export Citation Format

Share Document