scholarly journals Solution behavior of new cationic surfactants synthesized by using long-chain Guerbet alcohols in water and their application to hair conditioners.

1990 ◽  
Vol 23 (4) ◽  
pp. 301-309 ◽  
Author(s):  
Kazuyuki Yahagi ◽  
Naoko Hoshino ◽  
Hajime Hirota
Keyword(s):  
Cationic Surfactants ◽  
Solution Behavior ◽  
Guerbet Alcohols ◽  
Long Chain

scholarly journals The kinetics of the reduction of the lipophilic quinone avarone by N-alkyl-1,4-dihydronicotinamides of various lipophilicities

1999 ◽  
Vol 64 (11) ◽  
pp. 647-654 ◽  
Author(s):  
Mario Zlatovic ◽  
Dusan Sladic ◽  
Miroslav Gasic
Keyword(s):  
Cationic Surfactants ◽  
Reaction Rate ◽  
Anionic Surfactants ◽  
Reaction Rates ◽  
Biologically Active ◽  
Ionic Surfactants ◽  
Protic Solvent ◽  
Model Compounds ◽  
Kinetics Of ◽  
Long Chain

Several NADH model compounds, N-alkyl-1,4-dihydronicotinamides, some of them possessing amphiphilic properties, have been synthesized, and the kinetics of their reaction with a biologically active liphophilic quinone, avarone, has been studied in a protic solvent both in the presence and absence of cationic, anionic or non-ionic surfactants. In the absence of micellar agents, the medium- and long-chain N-dodecyl (3) and N-heptadecyl (4) derivatives show a significant increase in the reaction rates compared to other model compounds, due to the stabilization of the semiquinone intermediate. Anionic surfactants retard the reaction, non-ionic surfactants slightly accelerate the reaction with the short-chain derivatives, and retard the reaction with the medium- and long-chain derivatives, and the cationic surfactants increase the reaction rate with all derivatives except the long-chain 4. The results support the e-p-e mechanism of the reduction of lipophilic quinones byNADHmodels in protic medium.

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