Anion responsive molecular valve consisting of poly(4-vinylpyridine) gel

被引：0
|
作者：
Takada, Kazutake [1 ]
Takezaki, Masahiro [1 ]
Hisamatsu, Naoki [1 ]
Yuchi, Akio [1 ]
机构：
[1] Nagoya Inst Technol, Grad Sch Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 185卷
关键词：
Molecular valve; Molecular gate; Poly(4-vinylpyridine) gel; COUNTERION BINDING; FLOW-CONTROL; MEMBRANES; POLYMER;
D O I：
10.1016/j.snb.2013.04.112
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An anion responsive molecular valve comprised of poly(4-vinylpyridine) gel-coated Au mesh was developed. At pH 3 the valve closed when the concentration of anions such as Cl-, ClO4-, SCN-, and HSO4- was low, whereas automatically opened upon an increase in the concentration of anion due to collapse of the gel. The valve re-closed upon a loading of a 1 x 10(-3) M HCl solution. The concentration where the valve opens was found to increase in the order of HSO4- < ClO4- = SCN- < Cl- (5 x 10(-3), 8 x 10(-3), 8 x 10(-3), and 8 x 10(-2) M, respectively). This order was consistent with that of a concentration where the gel shrinks and was rationalized by affinity between an anion and pyridyl group of the gel. The valve exhibited repeated opening and closing 5 cycles upon alternative loading of NaClO4 (pH 3) and 1 x 10(-3) M HCl solutions, and 20 cycles for Na2SO4 (pH 3) and HCl solutions. The effect of cation was also studied. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：140 / 145
页数：6
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