TY - JOUR
T1 - Extraction mechanisms of charged organic dye molecules into silica-surfactant nanochannels in a porous alumina membrane
AU - Yamaguchi, Akira
AU - Watanabe, Jun
AU - Mahmoud, Mekawy M.
AU - Fujiwara, Rise
AU - Morita, Kotaro
AU - Yamashita, Tomohisa
AU - Amino, Yosuke
AU - Chen, Yong
AU - Radhakrishnan, Logudurai
AU - Teramae, Norio
PY - 2006/1/18
Y1 - 2006/1/18
N2 - 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.
AB - 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.
KW - Alumina membrane
KW - Extraction
KW - Silica-surfactant nanochannel
UR - http://www.scopus.com/inward/record.url?scp=29944436955&partnerID=8YFLogxK
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U2 - 10.1016/j.aca.2005.06.029
DO - 10.1016/j.aca.2005.06.029
M3 - Article
C2 - 17723343
AN - SCOPUS:29944436955
VL - 556
SP - 157
EP - 163
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
IS - 1
ER -