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Showing 1 to 13 of 13 for “"solvatochromism"”.
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Solvatochromic pyrogallarenes and pyrogallarene crystals
… in the crystal structure, a hallmark of solvatochromism. Titration of C-propyl pyrogallol[4]arene over the entire pH range showed that the solvatochromism was pH-sensitive. C-propyl pyrogallol[4]arene operates as a pH indicator but is chemically distinct from common pH indicators. Mapping …
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Synthesis and molecular properties of zwitterionic adducts of TCNQ and other related compounds
… of the adducts studied display highly negative solvatochromism as the solvent polarity increases, in which their absorption maxima are linearly related with the normalised ENT values for the Reichardt dye. However the fluorinated quinolinium and pyridinium derivatives exhibit an unusual …
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Biopolymer-mediated analyte detection via photoluminescence modulation of single-walled carbon nanotubes
… DNA complex can detect genotoxic analytes by solvatochromism, and measure this from within live cells and tissues in real-time. We find that such optical signals can be multiplexed, resulting in analyte fingerprinting, and a bioanalyte can be detected at the single-molecule level stochastic …
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The synthesis and characterisation of Langmuir-Blodgett film forming TCNQ adducts.
… respectively) exhibit properties such as solvatochromism, molecular rectification and second harmonic generation. Further synthetic work concentrated on modifying the donor, the acceptor and the substitution position within these zwitterions to create a series of diverse materials for …
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Studying the properties of conjugated donor acceptor complexes with naphthaleneimide acceptors and dialkoxybenzene donors linked by a triple bond
… in solution and in the solid state as well as solvatochromism. These properties are due to aromatic stacking as well as conjugation. In an attempt to alter the stacking structure in the solid state, a nitro substituted naphthaleneimide acceptor linked to a dialkoxybenzene donor by a triple bond …
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The synthesis and investigation of alizan-based functional chromogenic probes for heavy mental sensing in aqueous medium
… little to no effect of modification of alizarin. Solvatochromism effect associated with dithizone, alizarin and phenylfluorone was observed. Varied and sensitive chromic behaviour was observed in dithizone, displaying colour variances in DMF, methanol, acetonitrile, chloroform, acetone and ethanol.
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Ratiometric fluorescent metal ion indicators based on functionalized poly(N -isopropylacrylamide)
… transition is transduced by either fluorescence solvatochromism or fluorescence resonance energy transfer (FRET), which forms the basis of two slightly different designs.</p><p>The first design incorporates the dansyl moiety, a polarity-sensitive fluorophore which emits more strongly at a shorter …
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Responsive polymers for optical sensing applications
… of fluorescence resonance energy transfer and solvatochromism, such fluorescent copolymers enabled monitoring of stimuli such as the solution temperature and ionic strength, but also of association/disassociation mechanisms with other macromolecules or of biochemical binding events through …
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Stereochemical effects on intervalence charge transfer
… theoretical and experimental framework for IVCT. Solvatochromism studies on the meso and rac diastereoisomers of [{Ru(bpy)2}2(μ-bpm)]5+ {bpy = 2,2'-bipyridine; bpm = 2,2'-bipyrimidine} reported in Chapter 2, reveal striking differences between their IVCT characteristics due to …
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Conjugated Polymer Brushes (Poly(3-hexylthiophene) brushes): new electro- and photo-active molecular architectures
… of PDOTT chains. The polymer films produced show solvatochromism and electrochromism, as well as the previous two methods. After polymerization, the next step towards building organic electronic devices is applying the methods obtained in nano- and microscale production. Block copolymers …
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Neue Aspekte zum Design von ionensensitiven und solvatochromen Fluoreszenzsensoren
Neuartige Akzeptor-substituierte Fluoresenzsensoren wurden etabliert, die durch signifikante Rotverschiebung der Emissionsmaxima Analyten nachweisen und deren pH-Sensitivität über das Substitutionsmuster variierbar ist. Es wurde gezeigt, dass 2-Methoxyanthracenderivate eine duale Emission …
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Design, synthesis and fluorescent characterisation of 2,5-dihydro-1,2,3-triazines
… by the solvent or microenvironment as no solvatochromism was observed in both the ground and excited state. The photostability of triazine 3a in toluene was proven to be exceptional when placed under constant irradiation at 310 nm excitation in a spectrometer. When 3a in toluene was …