Extraction mechanisms of charged organic dye molecules into silica-surfactant nanochannels in a porous alumina membrane

Extraction mechanisms of charged organic dye molecules are examined for an assembly of silica-surfactant nanochannels with a channel diameter of 3.4 nm, which is formed inside the pores of an anodic alumina membrane by a surfactant-template method. Experimental results confirm that the extraction me...

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Bibliographic Details
Published in:Analytica chimica acta 2006-01, Vol.556 (1), p.157-163
Main Authors: Yamaguchi, Akira, Watanabe, Jun, Mahmoud, Mekawy M., Fujiwara, Rise, Morita, Kotaro, Yamashita, Tomohisa, Amino, Yosuke, Chen, Yong, Radhakrishnan, Logudurai, Teramae, Norio
Format: Article
Language:English
Subjects:
Alumina membrane
Extraction
Silica-surfactant nanochannel
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Summary:Extraction mechanisms of charged organic dye molecules are examined for an assembly of silica-surfactant nanochannels with a channel diameter of 3.4 nm, which is formed inside the pores of an anodic alumina membrane by a surfactant-template method. Experimental results confirm that the extraction mechanism depends on the sign of a charge of the dye molecules. The extraction of the cationic rhodamine 6G is predominantly caused by an ion-pair extraction process, whereas an anion-exchange process is mainly responsible for the extraction of the anionic sulforhodamine B. These extraction mechanisms are discussed by considering the microstructures of the silica-surfactant nanochannels.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2005.06.029