Potassium-ion-selective sensing based on selective reflection of cholesteric liquid crystal membranes

被引：0

作者：

Shinpei Kado

Yuuhei Takeshima

Yoshio Nakahara

Keiichi Kimura

机构：

[1] Wakayama University,Department of Applied Chemistry, Faculty of Systems Engineering

来源：

Journal of Inclusion Phenomena and Macrocyclic Chemistry | 2012年 / 72卷

关键词：

Cholesteric liquid crystal; Selective reflection; Structural color; Crown ether;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

It is well-known that cholesteric liquid crystals have an optical property, selective reflection, due to changes in the pitch of their helical structure. This unique property of cholesteric liquid crystals can be used to attain a visual sensing system showing color changes as the detection signal. In this paper, we report a visual sensing membrane comprising cholesteric liquid crystals, in which a 15-crown-5 derivative was incorporated as ion recognizing sites, for K+ in aqueous solution. The resulting CLC membrane showed a shift of the reflection peak sensitive to K+ in water. We have also designed polymer-dispersed liquid crystal membranes that showed ion-selective reflection peak shifts with improved response time.

引用

页码：227 / 232

页数：5

共 39 条

[1]

Tamaoki N(2001)Cholesteric liquid crystals for color information technology Adv. Mater. 13 1135-1147

[2]

Shibaev PV(2002)Responsive chiral hydrogen-bonded polymer composites Chem. Mater. 14 959-961

[3]

Schaumburg K(2004)Lasing and narrowing of spontaneous emission from responsive cholesteric films Chem. Mater. 16 1397-1399

[4]

Plaksin V(2006)Color changing cholesteric polymer films sensitive to amino acids Macromolecules 39 3986-3992

[5]

Shibaev PV(2001)Color indicators of molecular chirality based on doped liquid crystals Angew. Chem. Int. Ed. 40 3198-3200

[6]

Madsen J(1990)Syntheses and thermal properties of new liquid crystals bearing a crown ether ring: cation binding in the nematic phase J. Org. Chem. 55 541-548

[7]

Genack AZ(1996)Fluorophobic effect induces the self-assembly of semifluorinated tapered monodendrons containing crown ethers into supramolecular columnar dendrimers which exhibit a homeotropic hexagonal columnar liquid crystalline phase J. Am. Chem. Soc. 118 9855-9866

[8]

Shibaev PV(2005)Ionic liquid crystals Chem. Rev. 105 4148-4204

[9]

Chiappetta D(2008)Luminescence and mesogenic properties in crown-ether-isocyanide or carbene gold(I) complexes: luminescence in solution, in the solid, in the mesophase, and in the isotropic liquid state Inorg. Chem. 47 3559-3567

[10]

Sanford RL(1995)Ion-conducting behaviour and photoinduced ionic conductivity switching of composite films containing crowned cholesteric liquid crystals Chem. Soc. Faraday Trans 91 1237-1240

← 1 2 3 4 →