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Electrochemical and Photophysical Behavior of 1-naphthol in Benzyl-N-Hexadecyldimethylammonium 1,4-bis(2-ethylhexyl)sulfosuccinate Large Unilamellar Vesicles

Electrochemical and Photophysical Behavior of 1-naphthol in Benzyl-N-Hexadecyldimethylammonium 1,4-bis(2-ethylhexyl)sulfosuccinate Large Unilamellar Vesicles

Airam K Cobo Solis, N Mariano Correa, Patricia G Molina

Phys Chem Chem Phys. 2016 Jun 21;18(23):15645-53.

PMID: 27221948

Abstract:

In the present contribution, 1-naphthol is investigated in large unilamellar vesicles formed from a new catanionic surfactant, benzyl-n-hexadecyldimethylammonium 1,4-bis(2-ethylhexyl)sulfosuccinate, by electrochemical and spectroscopic techniques. The electrochemical results show that 1-naphthol experiences a partition process between the water phase and the large unilamellar vesicle bilayer phase, which is corroborated by absorption spectroscopic studies at pH = 6.40 and pH = 10.75. Interestingly, studies of 1-naphthol emission in benzyl-n-hexadecyldimethylammonium 1,4-bis(2-ethylhexyl)sulfosuccinate large unilamellar vesicles at pH = 10.75 and in sodium 1,4-bis(2-ethylhexyl)sulfosuccinate water solution show that when the 1,4-bis(2-ethylhexyl)sulfosuccinate moiety is part of the bilayer, the 1,4-bis(2-ethylhexyl)sulfosuccinate polar head interacts strongly with 1-naphthol, by favoring emission from the excited neutral species resulting in the appearance of a new band close to λ = 355 nm. It seems that the large unilamellar vesicle bilayer of the catanionic vesicle slows down the proton transfer process observed in water, where only emission from 1-naphtholate is detected.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP211809675	1,4-Bis(2-ethylhexyl)-2,5-di-1-propynylbenzene		211809-67-5	Price

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