Results 21 to 30 of about 370 (160)

Fluorescent Carbazole-Derived Aza[5]Helicenes: Synthesis, Functionalization, and Characterization. [PDF]

open access: yesChemistry
Variously substituted indolophenanthridines, indolocarbazoles, and cinnolinocarbazoles synthesized by ortho fusion from teraryl precursors show significant Stokes shifts, especially for the protonated states of indolophenanthridines and cinnolinocarbazole.
Marten I, Dilanas MEA, Podlech J.
europepmc   +2 more sources

Spiropyran-based chromic hydrogels for CO2 absorption and detection

open access: yesFrontiers in Chemistry, 2023
By enabling rapid, cost-effective, user-friendly and in situ detection of carbon dioxide, colorimetric CO2 sensors are of relevance for a variety of fields.
Arnau Marco   +3 more
doaj   +1 more source

2,5-Bis((E)-2-ferrocenylvinyl)-N,N,N′,N′-tetrapropylbenzene-1,4-diamine

open access: yesMolbank, 2022
The synthesis and spectroscopic investigation of an acidochromic phenylenevinylene dye with two ferrocene groups is presented.
Matthias Jochem   +3 more
doaj   +1 more source

Redox and pH-Induced Switching in Solution and on Surfaces:from spiropyrans to manganese oxidation catalysts [PDF]

open access: yes, 2022
The study of fundamental properties of single layers of molecules on gold under various conditions, mainly the influence of pH and electrode potential, is the focus of this thesis. We have demonstrated the first instance of redox switching of spiropyrans,
Steen, Jorn D.
core   +1 more source

Novel Indoline Spiropyrans Based on Human Hormones β-Estradiol and Estrone: Synthesis, Structure, Chromogenic and Cytotoxic Properties

open access: yesMolecules, 2023
The introduction of a switchable function into the structure of a bioactive compound can endow it with unique capabilities for regulating biological activity under the influence of various types of external stimuli, which makes such hybrid compounds ...
Ilya V. Ozhogin   +11 more
doaj   +1 more source

Acidochromic spiropyran–merocyanine stabilisation in the solid state [PDF]

open access: yesActa Crystallographica Section A Foundations and Advances, 2018
Stabilizing the open-ring merocyanine form of a spiropyran compound based on co-crystallisation with inorganic acids.
Vanessa Kristina Seiler   +6 more
openaire   +2 more sources

Acidochromism of donor–acceptor Stenhouse adducts in organic solvent

open access: yesChemical Communications, 2022
First generation DASA derivatives can be reversibly isomerized upon protonation, thus behaving as acidochromic compounds in halogenated organic solvent.
Antonio Fiorentino   +6 more
openaire   +3 more sources

Acidochromic Behavior of Dibenzylidene Cyclohexanone-Based Bischalcone: Experimental and Theoretical Study. [PDF]

open access: yesACS Omega, 2020
Synthesis and characterization of substituted 2,6-dibenzylidene cyclohexanone-based bischalcone derivatives and their optimized geometries were investigated by density functional theory. The synthesized compounds were identified through ultraviolet-visible, Fourier transform infrared, and 1H nuclear magnetic resonance spectroscopies and elemental ...
Badal MMR   +3 more
europepmc   +5 more sources

Photomechanical effects of acidochromic diarylethene derivatives [PDF]

open access: yesSCIENTIA SINICA Chimica, 2019
Naphthalenylvinylbenzoxazol BO1N4F and naphthalenylvinylbenzothiazole BT1N4F have been synthesized, and led to topo-photochemical reactions. Compared with BT1N4F , the dimerization efficiency of BO1N4F is so high that more stress is yielded in the crystals during [2+2] cycloaddition reaction.
Jiang Peng   +5 more
openaire   +1 more source

Contrasting Photochromic and Acidochromic Behaviors of Pyridyl- and Pyrimidylethynylated Mono- and Bis-Benzopyrans. [PDF]

open access: yesACS Omega, 2021
Investigation of photochromic and acidochromic behaviors of a set of pyridyl- and pyrimidylethynylated mono- and bis-benzopyrans reveals an intriguing influence of the N-heteroaryl ring on spectrokinetic properties of the photogenerated o-quinonoid colored reactive intermediates.
Mukhopadhyay A   +3 more
europepmc   +5 more sources

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