Results 131 to 140 of about 370 (160)

Aggregation, Acidochromicity, and Metallochromicity of a Pyridine-Based Poly(aryleneethynylene)

Macromolecules, 2014
A pyridine-containing poly(aryleneethynylene) (PAE) is investigated, showing surprisingly versatile changes of its photophysical properties in response to external stimuli. Because of agglomeration-induced planarization of the backbone, this PAE exhibits a significant red-shift in absorption and emission, when moving from good to poor solvents.
Kai Seehafer, Markus Bender, Uwe H. F. Bunz   +2 more
openaire   +1 more source

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
openaire   +1 more source

A photochromic–acidochromic HCl fluorescent probe. An unexpected chloride-directed recognition

The Analyst, 2016
A fluorescent-chromogenic Schiff base probe displays multiresponsive properties and specific interactions with HCl giving an acidofluorochromic response to light (photochromism) and the nature of the solvent (solvatochromism).
Arturo, Jiménez-Sánchez, Rosa, Santillan   +1 more
openaire   +2 more sources

Synthesis and Optical Properties of Acidochromic Amine-Substituted Benzo[a]phenazines

The Journal of Organic Chemistry, 2011
A new series of alkylamine- or arylamine-substituted benzo[a]phenazines have been synthesized from 1,2-naphthoquinones by employing simple sequential Michael-type addition with a variety of primary and secondary amines and the condensation reaction of the resulting amine-substituted 1,2-naphthoquinones with o-phenylenediamine. They exhibited absorption
Prachi, Singh, Abhishek, Baheti, K R Justin, Thomas   +2 more
openaire   +2 more sources

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
openaire   +1 more source

Acidochromism of stilbenoid chromophores with a p‐aminoaniline centre

Journal of Physical Organic Chemistry, 2006
AbstractOligo(phenylenevinylene)s (OPV) with a 2,5‐diaminobenzene centre were prepared via twofold Horner olefinations of substituted terephthalaldehydes. Whereas variations of the environment only slightly alter the electronic excitation spectra, the fluorescence spectra appear to be highly responsive.
Heiner Detert, Volker Schmitt
openaire   +1 more source

Preparation and Properties of Polyurethane@TPECNPy‐2 Acidochromic Micro/Nanofibrous Membranes

Luminescence
ABSTRACT Acidochromic fluorescent membranes have garnered significant research interest owing to their potential in real‐time environmental monitoring and smart sensing applications. However, the rational design of membranes to optimize their structure–property interplay for enhanced acidochromic performance remains further explored ...
Baoyu Huang, Fengyuan Lin, Jialing Chen, Wenyang Xie, Anqi Xu, Zixin Huang, Xintong Zu, Peihui Fang, Xi Liu, Gaoyi Xie, Chunping Ma   +10 more
openaire   +2 more sources

The acidochromism of an N-methyl pyrrole-based enone dye toward trifluoroacetic acid in different solvents and solid state

Journal of Photochemistry and Photobiology A: Chemistry, 2022
Tanlong Xue
exaly  

Synthesis and photophysical properties of metal complexes of curcumin dyes: Solvatochromism, acidochromism, and photoactivity

Dyes and Pigments, 2022
Bruna M de França, Thaïs P Mello, André L S Santos   +2 more
exaly  

Reversible acidochromism of a benzoxazole based scaffold and construction of reconfigurable dual output molecular logic gates

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2022
Manas Mahato, Najmin Tohora, Susanta Ghanta   +2 more
exaly