Addition of triphenylphosphine to electron-deficient alkenes in mixed binary solvents: Overcoming the problem of preferential solvation to determine the reaction order with respect to protic solvent

2020 ◽  
Vol 318 ◽  
pp. 113911
Author(s):  
Alexey V. Salin ◽  
Dinara R. Khisamova
Keyword(s):  
Reaction Order ◽  
Preferential Solvation ◽  
Binary Solvents ◽  
Protic Solvent

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
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