Photocontrol of ion-sensor performances in neutral-carrier-type ion sensors based on liquid-crystalline membranes

Oosaki, Syusuke; Hayasaki, Hisanobu; Sakurai, Yasuhisa; Yajima, Seishi; Kimura, Kazuhiro

doi:10.1039/b507258a

Cited by 16 publications

(10 citation statements)

References 7 publications

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“…These showed remarkable changes in their ion selectivity on irradiation, induced by the LC phase transition of the membranes. 207 Later examples focused on the control of hydrophobic/ hydrophilic balance brought about by photoisomerization. The swelling degree of a membrane in water made from an amphiphilic copolymer, poly(hydroxyethyl methacrylate) functionalized with azobenzene side groups, was found to decrease with UV irradiation but could be recovered to its original level by irradiating with visible light.…”

Section: Membranes-photo-regulated Permeabilitymentioning

confidence: 99%

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

2010

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There has been considerable interest in the application of photochromism to photo-responsive systems which has led to the development of new tailored smart materials for photonics and biomedical fields. Within a polymeric matrix photochromic isomerizations can be stimulated by light to reversibly alter the physical and chemical properties of a material such as LC phase, shape, surface wettability, permeability, solubility, self-assembly, size and fluorescence. The underlying principles behind photoresponsive behavior, subsequent applications and relevant examples are discussed in this review.

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Section: Membranes-photo-regulated Permeabilitymentioning

confidence: 99%

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

2010

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“…Isomerization under UV light is also observed for other photo-chromic molecules like pyrimidine 231 , diarylethene 232 , viologen 233 and spiropyran 234 . Photo-responsive membranes can be obtained by preparing from monomers or polymers containing photo-chromic groups 235 , functionalizing membrane pores/surfaces with photo-responsive polymers 236 or embedding photo-switchable carriers into membranes 237 . A comprehensive review on photo-responsive polymeric membranes was recently done by Nicoletta et al 238 .…”

Section: Photo-responsementioning

confidence: 99%

1.6 Advanced Polymeric and Organic–Inorganic Membranes for Pressure-Driven Processes

Duong

Nunes

2017

Comprehensive Membrane Science and Engineering

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The state of the art of membranes for reverse-osmosis, nanofiltration and gas separation is shortly reviewed, taking in account the most representative examples currently in application. Emphasis is done also on recent developments of advanced polymeric and organic-inorganic materials for pressure driven processes. Many of the more recent membranes are not only polymeric but contain also an inorganic phase. Tailoring innovative materials with organic and inorganic phases coexisting in a nanoscale with multi-functionalization is an appealing approach to control at the same time diffusivity and gas solubility. Other advanced materials, which are now being considered for membrane development are organic or organic-inorganic self-assemblies, metal-organic frameworks and different forms of carbon fillers.

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“…We have previously reported that the ion selectivity of the ISEs based on low-molecular-weight liquid-crystalline compounds can be controlled by external stimulus: the changes of the ion selectivity were induced by the phase transition of the liquidcrystalline compounds used as the membrane solvents. [5][6][7][8] It was shown that the ion-sensor properties of ISEs depend remarkably on the orientation of neutral carriers in the ion-sensing membrane.…”

Section: Introductionmentioning

confidence: 99%

Selectivity enhancement in neutral-carrier-type ion sensors based on a liquid-crystalline polymer

Osaki

Yajima

Kimura

2009

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A liquid-crystalline polymer was applied to a neutral-carrier-type ion sensor as a membrane material for enhancement of ion selectivity. An ion-sensitive field-effect transistor (ISFET) based on the membranes containing the polymer showed high sensitivity and selectivity for K+ by adding a low-molecular-weight liquid crystal as the plasticizer. The ion-sensor properties of the ISFETs based on the membranes containing a liquid-crystalline polymer were similar to those of the corresponding ion-selective electrodes (ISEs) based on the same polymer. The ion sensor with a liquid-crystalline polymer was more durable than that without any liquid-crystalline polymer. The use of liquid-crystalline polymer as the membrane material improves not only the ion-sensor properties but also the durability.

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Photocontrol of ion-sensor performances in neutral-carrier-type ion sensors based on liquid-crystalline membranes

Cited by 16 publications

References 7 publications

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

1.6 Advanced Polymeric and Organic–Inorganic Membranes for Pressure-Driven Processes

Selectivity enhancement in neutral-carrier-type ion sensors based on a liquid-crystalline polymer

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