Results 11 to 20 of about 630 (149)

Crystalline Derivatives of Dipyrazolo-1,5-diazocine and Dipyrazolopyrimidine: A Case of Unexpected Synthesis and Isostructural Polymorphism

open access: yesCrystals, 2022
Pyrazole-phenylmethanimines (Shiff bases), Py–N=CH–Ph, form molecular crystals whose supramolecular and self-assembly properties can be tuned according to the substitution made on the aromatic and pyrazole rings.
Fernando Cuenú-Cabezas   +2 more
doaj   +2 more sources

Tröger’s Base-Derived Thermally Activated Delayed Fluorescence Dopant for Efficient Deep-Blue Organic Light-Emitting Diodes [PDF]

open access: yesMolecules, 2023
The development of efficient deep-blue emitters with thermally activated delayed fluorescence (TADF) properties is a highly significant but challenging task in the field of organic light-emitting diode (OLED) applications.
Ze-Ling Wu   +4 more
doaj   +2 more sources

Solvent-Free Synthesis of Diazocine

open access: yesSynthesis, 2017
A convenient two-step synthesis of diazocine starting from 2-nitrotoluene is described. The first step, the oxidative dimerization of 2-nitrotoluene, is improved to 95% yield. The second step, the reductive azo cyclization, is performed as a solvent-free reaction with lead powder in a ball mill (51% yield).
Widukind Moormann   +2 more
openaire   +2 more sources

Photoswitchable Diazocine Derivative for Adenosine A<sub>3</sub> Receptor Activation in Psoriasis. [PDF]

open access: yesJ Am Chem Soc
Incorporating photoisomerizable moieties within drugs offers the possibility of rapid and reversible light-dependent switching between active and inactive configurations.
López-Cano M   +11 more
europepmc   +2 more sources

Photoswitchable Azo- and Diazocine-Functionalized Derivatives of the VEGFR-2 Inhibitor Axitinib. [PDF]

open access: yesInt J Mol Sci, 2020
In this study, we aimed at the application of the concept of photopharmacology to the approved vascular endothelial growth factor receptor (VEGFR)-2 kinase inhibitor axitinib.
Heintze L   +7 more
europepmc   +2 more sources

Synthesis and Properties of Cyclic Imide Extended Diazocines: Tweezer-Like, Rigid Photoswitches with Large Switching Amplitudes. [PDF]

open access: yesChemistry
Diazocines are bridged azobenzenes with improved photophysical properties. One of the main features is the fact that, unlike the azobenzenes, the Z form is more stable than the E isomer. Another important property is the more rigid structure (tricyclic),
Businski A   +6 more
europepmc   +2 more sources

A Scanning Tunneling Microscopy Study of the Photoisomerization of Diazocine

open access: yesThe Journal of Physical Chemistry Letters
Azobenzenes are fascinating molecular machines that can reversibly transform between two isomeric forms by an external stimulus. Diazocine, a type of bridged azobenzene, has been shown to possess enhanced photoexcitation properties. Due to the distortion caused by the ethyl bridge in the E-isomer, the Z-form becomes the thermodynamically stable ...
Chamathka Dehiwala Liyanage   +5 more
openaire   +3 more sources

Photoswitching of Diazocines in Aqueous Media

open access: yesThe Journal of Organic Chemistry, 2021
We present a systematic investigation of the photophysical properties of diazocines in aqueous media. The Z-E photoconversion yields of CH2CH2- and CH2S-bridged diazocines decrease with increasing water content in acetonitrile. However, there is one exception.
Pascal Lentes   +6 more
openaire   +3 more sources

Active Ester Functionalized Azobenzenes as Versatile Building Blocks

open access: yesMolecules, 2021
Azobenzenes are important molecular switches that can still be difficult to functionalize selectively. A high yielding Pd-catalyzed cross-coupling method under mild conditions for the introduction of NHS esters to azobenzenes and diazocines has been ...
Sven Schultzke   +2 more
doaj   +1 more source

Dibenzo[b,f][1,5]Diazocines/ZnO Organic/Inorganic Hybrid Photoanodes for Efficient Photo Electrochemical Water Splitting

open access: yesInternational Journal of Photoenergy, 2022
In this study, we propose dibenzo[b,f][1,5]diazocine/ZnO organic/inorganic hybrid photoanode for application in the photoelectrochemical water splitting.
Sissembayeva Yana   +2 more
doaj   +1 more source

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