Results 121 to 130 of about 370 (160)
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Design of acidochromic dyes for facile preparation of pH sensor layers
Analytical and Bioanalytical Chemistry, 2008Eight new acidochromic dyes have been synthesised that can be used for optically monitoring pH in the range from 3 to 12. Their corresponding pK(a) values have been both measured and calculated theoretically by means of density functional theory. The synthesis of these new dyes is facile without the need for chromatographic purification.
Gerhard J, Mohr +9 more
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Solvatochromism, acidochromism and aggregation-induced emission of propeller-shaped spiroborates
Dalton Transactions, 2018Propeller-shaped pyridyl-enolato-catecholate/-salicyl spiroborates (Sborepy1–6) were synthesized.
Kang Li +6 more
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Self-healing and acidochromic polyvinyl alcohol hydrogel reinforced by regenerated cellulose
Carbohydrate Polymers, 2021Recently, integration of self-healing, color-tunable, sol-gel converted properties into hydrogel has attracted interest for preparing a reinforced multifunctional hydrogel. Herein, acidochromic regenerated cellulose (ARC) was incorporated into the polyvinyl alcohol/borax (PB) matrix for constructing a tough, self-healing, multicolor and sol-gel ...
Lei Ding +7 more
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Four styryl phenanthroline derivatives as excellent acidochromic probes
Dyes and Pigments, 2019Abstract Four newly-synthetized styryl-phenanthroline derivatives were found to exhibit great acidochromism starting from neutral pH values down to negative H0. The aqueous solution of all of the four molecules features a yellow color at nearly neutral pH, but when the acidity of the solution increases, the color changes and, depending on the ...
Alessio Cesaretti +6 more
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Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Water monitoring in organic solvents is crucial but remains challenging. Karl Fischer titration can reach ∼1 ppm but relies on toxic reagents and bench-top equipment; most fluorescent probes, in contrast, cover 0.99); DHF achieves an LOD of 0.0016 % (v/v) in DMSO with a rapid response. The maximum RSD is 3.4 %, confirming acceptable repeatability. DHB
Yunpeng, Qi +5 more
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Water monitoring in organic solvents is crucial but remains challenging. Karl Fischer titration can reach ∼1 ppm but relies on toxic reagents and bench-top equipment; most fluorescent probes, in contrast, cover 0.99); DHF achieves an LOD of 0.0016 % (v/v) in DMSO with a rapid response. The maximum RSD is 3.4 %, confirming acceptable repeatability. DHB
Yunpeng, Qi +5 more
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Acidochromicity of a low‐molecular‐weight pyrimidine‐based copolymer
Journal of Applied Polymer Science, 2014ABSTRACTA new type of low‐molecular‐weight polypyrimidine in a π‐conjugated main chain was prepared by a Grignard reaction between 2‐amino‐4,6‐dichloropyrimidine and 1,4‐dibromo‐2,5‐didodecyloxybenzene in the presence of [1,2‐Bis(diphenylphosphino) ethane]dichloronickel(II).
Xirali Mamtimin +7 more
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Croconines: new acidochromic dyes for the near infrared region
Tetrahedron Letters, 2002Abstract The synthesis and characterization of new nor-indocrococyanine dyes are described. The acid form of the obtained dyes has an absorbance maxima in the 759–800 nm range. They present spectral changes at pH 6.5–9.7.
Cristina Encinas +4 more
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CrystEngComm, 2018
Highly fluorescent emissive dimethylamine substituted bisbenzocoumarins (DB-Cns) show reversible fluorescence color changes under mechanical force stimuli and acidochromic properties.
Shaojin Chen +5 more
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Highly fluorescent emissive dimethylamine substituted bisbenzocoumarins (DB-Cns) show reversible fluorescence color changes under mechanical force stimuli and acidochromic properties.
Shaojin Chen +5 more
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Acidochromic fibrous polymer composites for rapid gas detection
Journal of Materials Chemistry A, 2017Electrospun spiropyran-embedded nanofibers for fast photocontrollable and reversible optochemosensing of acidic vapors.
Genovese, Maria Erminia +5 more
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Bis(pyridylvinyl)diaminobenzenes: synthesis, acidochromism and solvatochromism of the fluorescence
Journal of Luminescence, 2005Abstract C2-symmetrical 1,4-distyrylbenzenes with 4-dimethylaminobenzene or pyridine as terminal rings, and propyloxy or dipropylamino groups in the central 2,5-positions were prepared. Solvatochromism of the absorption is small, but more pronounced in the fluorescence spectra. Some compounds exhibit huge Stokes shifts.
H. Detert, E. Sugiono
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