Results 131 to 140 of about 346 (146)

Imidazole-Based Solid-State Fluorescence Switch: Stimuli-Responsive Emission, Mechanochromism and Acidochromism

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2023
Stimuli modulated fluorescence properties of imidazole-based molecular probe (E)-2-(5,5-dimethyl-3-(4-(1,4,5-triphenyl-1H-imidazole-2-yl)styryl)cyclohex-2-en-1- ylidene)malononitrile (Ph-ISO) in the solid state is presented. Not only did the probe display aggregation induced emission (AIE) activity with intense solid-state fluorescence emission, but ...
, Megha, Paramjit, Kaur, Kamaljit, Singh
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Bis(pyridylvinyl)diaminobenzenes: synthesis, acidochromism and solvatochromism of the fluorescence

Journal of Luminescence, 2005
Abstract 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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Acidochromicity of a low‐molecular‐weight pyrimidine‐based copolymer

Journal of Applied Polymer Science, 2014
ABSTRACTA 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, Abduwasit Tursun, Rukiya Matsidik, Sayyare Sidik, Kamarnisa Abdulla, Hayrulla Mamut, Ablikim Obulda, Ismayil Nurulla   +7 more
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Acidochromism of the luminescence of bis(4-pyridylethenyl)arenes

Synthetic Metals, 2004
Abstract A series of C 2 -symmetrical bis[( E )-2-(4-pyridyl)ethenyl]arenes has been synthesised via two-fold PO-activated olefinations. 1,4-Benzene, 1,4-naphthalene, 9,10-anthracene and 2,2′-diphenyl were used as central units. These fluorescent compounds were freely soluble in common solvents.
Heiner Detert, Ulf Stalmach, Erli Sugiono   +2 more
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Solvatochromism and acidochromism of azobenzene-functionalized poly(vinyl amines)

New Journal of Chemistry, 2012
Nucleophilic substitution of fluoroaromatics with poly(vinyl amine) (PVAm) is a suitable method for producing various azobenzene-functionalized PVAms. The solubility of the fluoroaromatic reagents in water was mediated by complexation with 2,6-O-dimethyl-β-cyclodextrin (DMCD). The degree of functionalization has been determined using model compounds as
Katja Hofmann, Susann Brumm, Carola Mende, Kevin Nagel, Andreas Seifert, Isabelle Roth, Dieter Schaarschmidt, Heinrich Lang, Stefan Spange   +8 more
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Synthesis and structure-property relationships of amphiphilic acidochromic hydroxystilbazolium dyes

Sensors and Actuators B: Chemical, 1997
Abstract A wide range of amphiphilic acidochromic dyes which are capable of forming Langmuir-Blodgett layers has been obtained by simple condensation of 2- and 4-methyl substituted N-octadecylpyridinium- and quinoliniumbromides with aromatic hydroxysubstituted aldehydes. The absorption maxima of the deprotonated forms of the dyes are in the range 500
Frank Lehmann, Gerhard J. Mohr, Ulrich -W. Grummt   +2 more
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Photoactivated acidochromic elastomeric films for on demand acidic vapor sensing

Journal of Materials Chemistry A, 2015
Photoresponsive, self-indicating and portable composite SP/PDMS films for on demand reversible broad acid vapor detection.
Maria Erminia Genovese, Athanassia Athanassiou, Despina Fragouli   +2 more
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9-(4-Dialkylaminostyryl)-acridines - a new class of acidochromic dyes

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1994
A series of new acidochromic 9-(4-dialkylaminostyryl)-acridines (1) were synthesized and characterized by means of elemental analysis, m.p., mass and 1H-NMR-spectra. The colour change in the presence of perchloric acid and the pKa was investigated. Their photosensitizing ability was tested by oxygen consumption measurements.
Heike Lindauer, Peter Czerney, Ulrich-W. Grummt   +2 more
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Photoactuation, photochromism and acidochromism of styrylindazole-based crystalline materials

Dyes and Pigments, 2023
Huan Xiao, Kaiqi Ye, Cheng Liu, Xiqiao Yang, Jingbo Sun, Ran Lu   +5 more
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Synthesis and acidochromic condensation of benzyl-?-anilinoethylamide

Chemistry of Heterocyclic Compounds, 1966
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