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

Akira Yamaguchi, Jun Watanabe, Mekawy M. Mahmoud, Rise Fujiwara, Kotaro Morita, Tomohisa Yamashita, Yosuke Amino, Yong Chen, Logudurai Radhakrishnan, Norio Teramae

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)157-163
Number of pages7
JournalAnalytica Chimica Acta
Volume556
Issue number1
DOIs
Publication statusPublished - 2006 Jan 18

Keywords

  • Alumina membrane
  • Extraction
  • Silica-surfactant nanochannel

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

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