Extraction mechanisms of charged organic dye molecules into silica-surfactant nanochannels in a porous alumina membrane.
Extraction mechanisms of charged organic dye molecules into silica-surfactant nanochannels in a porous alumina membrane.
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DOI：
10.1016/j.aca.2005.06.029
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发表时间：
2006-01
影响因子：
6.2
通讯作者：
A. Yamaguchi;J. Watanabe;M. M. Mahmoud-M.;Rise Fujiwara;Kotaro Morita;Tomohisa Yamashita;Yosuke Amino;Yong Chen;L. Radhakrishnan;N. Teramae
中科院分区：
文献类型：
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作者：
A. Yamaguchi;J. Watanabe;M. M. Mahmoud-M.;Rise Fujiwara;Kotaro Morita;Tomohisa Yamashita;Yosuke Amino;Yong Chen;L. Radhakrishnan;N. Teramae
采用表面活性剂-模板法在氧化铝膜孔内组装了直径为3.4 nm的二氧化硅-表面活性剂纳米孔道，研究了带电有机染料分子的萃取机理。实验结果证实，萃取剂的萃取机理取决于染料分子的电荷符号。阳离子罗丹明6G的萃取主要是通过离子对萃取过程进行的，而阴离子交换过程主要是由阴离子磺胺类若丹明B的萃取引起的。
Extraction mechanisms of charged organic dye molecules are examined for an assembly of silica-surfactant nanochannels with a channel diameter of 3.4nm, 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.