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 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.
Yamaguchi
Akira
A
Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan. akira@anal.chem.tohoku.ac.jp
Watanabe
Jun
J
Mahmoud
Mekawy M
MM
Fujiwara
Rise
R
Morita
Kotaro
K
Yamashita
Tomohisa
T
Amino
Yosuke
Y
Chen
Yong
Y
Radhakrishnan
Logudurai
L
Teramae
Norio
N