Aqueous polymeric sensors based on temperature-induced polymer phase transitions and solvatochromic dyes

Pietsch, Christian; Schubert, Ulrich S.; Hoogenboom, Richard

doi:10.1039/c1cc11940k

Cited by 163 publications

(132 citation statements)

References 155 publications

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“…26 Early works on scanning microscopy-based thermometry employing diagnostic techniques 24,59,60 and either electrical or scanning probe microscopy (with a particular emphasis on microelectronics and data storage devices) 25 were available between 1999 and 2005. Three other reviews partially covering the subject and dealing with ceramic phosphors that can withstand extreme temperatures, 61 multiple optical chemical sensors 62 and temperature-stimuli polymers 63 have been published in 2011.…”

Section: +mentioning

confidence: 99%

“…63 An example is the use of PS and polyacylonitrile to increase the solubility of C 70 , avoiding simultaneously the luminescence crosstalk with oxygen.…”

Section: Polymer Based Systemsmentioning

confidence: 99%

“…), and in particular for temperature measurements (see the recent review by Pietsch et al 63 ). This is also the case for organic-inorganic hybrids, including LDH materials.…”

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confidence: 99%

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Thermometry at the nanoscale

et al. 2012

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Non-invasive precise thermometers working at the nanoscale with high spatial resolution, where the conventional methods are ineffective, have emerged over the last couple of years as a very active field of research. This has been strongly stimulated by the numerous challenging requests arising from nanotechnology and biomedicine. This critical review offers a general overview of recent examples of luminescent and non-luminescent thermometers working at nanometric scale. Luminescent thermometers encompass organic dyes, QDs and Ln 3+ ions as thermal probes, as well as more complex thermometric systems formed by polymer and organic-inorganic hybrid matrices encapsulating these emitting centres. Non-luminescent thermometers comprise of scanning thermal microscopy, nanolithography thermometry, carbon nanotube thermometry and biomaterials thermometry. Emphasis has been put on ratiometric examples reporting spatial resolution lower than 1 micron, as, for instance, intracellular thermometers based on organic dyes, thermoresponsive polymers, mesoporous silica NPs, QDs, and Ln 3+ -based up-converting NPs and b-diketonate complexes. Finally, we discuss the challenges and opportunities in the development for highly sensitive ratiometric thermometers operating at the physiological temperature range with submicron spatial resolution.

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Section: +mentioning

confidence: 99%

“…63 An example is the use of PS and polyacylonitrile to increase the solubility of C 70 , avoiding simultaneously the luminescence crosstalk with oxygen.…”

Section: Polymer Based Systemsmentioning

confidence: 99%

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Thermometry at the nanoscale

et al. 2012

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“…This is part of a larger research field, namely functionalized polymers. [13][14][15][16] It has been shown that pH…”

Section: Introductionmentioning

confidence: 99%

Substituent effects on absorption spectra of pH indicators: An experimental and computational study of sulfonphthaleine dyes

Meyer

Hemelsoet²,

Speybroeck³

et al. 2014

Dyes and Pigments

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Sulfonphthaleine dyes are an important class of pH indicators, finding applications in novel (textile) sensors. In this paper, we present a combined experimental and theoretical study to elucidate the halochromic behaviour of a large set of sulfonphthaleine compounds. Starting from an experimental analysis consisting of UV/Vis spectroscopy, the pH region and the absorption wavelengths related to the colour shift are obtained and pK a values are derived. The effect of the substituents on the pH region can be traced back to their electron donating/withdrawing properties. Time-Dependent Density Functional Theory (TD-DFT) is able to adequately produce the trend in experimental wavelengths. Proton affinities are used to assess the effect of substituents on the pH region. The combination of theory and experiment is able to give a better understanding of the pH sensitivity; the methodology in this work will be useful in future dye design and is applicable to other dye classes as well.

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“…These stimuli-responsive polymers are prepared by combination of a responsive polymer phase transition (coil-to-globule) with a solvatochromic dye. [38] It is known that poly(N-isopropylacrylamide) (PNIPAM) is one of the most important water-soluble polymers, which exhibits a heat-induced phase transition from coiled to globular state in an aqueous solution in response to temperature changes across a lower critical solution temperature (LCST) at 32°C, [39] by expanded conformation in water below the LCST due to strong hydration, and changes to compact forms above the LCST by dehydration. [40,41] Continuing our works on heterocyclic chemistry, [42][43][44][45] herein, we wish to report a new heterocyclic pH-responsive dye based on diazenylphenyl-1,3,4-oxadiazol moiety and its use in a novel water-soluble polymeric sensor, which responds to both pH and temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 2-{5-[4-((4-nitrophenyl)diazenyl)phenyl]-1,3,4-oxadiazol-2-ylthio}ethyl acrylate monomer and its application in a dual pH and temperature responsive soluble polymeric sensor

Eftekhari‐Sis

Ghahramani

2015

Designed Monomers and Polymers

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The monomer 2-{5-[4-((4-nitrophenyl)diazenyl)phenyl]-1,3,4-oxadiazol-2-ylthio}ethyl acrylate (NDPOE-acrylate) was synthesized in five steps and then copolymerized with N-isopropylacrylamide, leading to a dual pH and temperature responsive polymeric sensor. Obtained copolymer exhibited the lower critical solution temperature only in acidic medium (pH 2) as 32°C. The UV-vis and fluorescence of copolymer was investigated at different pH values in various temperatures. The UV-vis of copolymer are independent to temperature above pH 4. The copolymer exhibited sensitive fluorescence change towards pH between 2 and 10 at different temperatures.

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Aqueous polymeric sensors based on temperature-induced polymer phase transitions and solvatochromic dyes

Cited by 163 publications

References 155 publications

Thermometry at the nanoscale

Thermometry at the nanoscale

Substituent effects on absorption spectra of pH indicators: An experimental and computational study of sulfonphthaleine dyes

Synthesis of 2-{5-[4-((4-nitrophenyl)diazenyl)phenyl]-1,3,4-oxadiazol-2-ylthio}ethyl acrylate monomer and its application in a dual pH and temperature responsive soluble polymeric sensor

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