Results 51 to 60 of about 4,021 (220)

Polarity-Dependent Twisted Intramolecular Charge Transfer in Diethylamino Coumarin Revealed by Ultrafast Spectroscopy

open access: yesChemosensors, 2022
Twisting intramolecular charge transfer (TICT) is a common nonradiative relaxation pathway for a molecule with a flexible substituent, effectively reducing the fluorescence quantum yield (FQY) by swift twisting motions.
Jiawei Liu, Cheng Chen, Chong Fang
doaj   +1 more source

Exploring the Synergy of Combining BINAP and tCzBN Motifs Within Multi‐Resonant TADF Emitters to Enhance OLED Performance

open access: yesAdvanced Optical Materials, EarlyView.
This work presents two MR‐TADF emitters, BINAP‐BN1 and BINAP‐BN2, based on a BINAP core and differing numbers of tCzBN units. Both emitters show similar solution photophysics, but distinct behavior in doped films, where BINAP‐BN1 exhibits higher photoluminescence quantum yield and suppressed aggregation‐induced emission broadening compared to BINAP‐BN2.
John Marques dos Santos   +8 more
wiley   +1 more source

Viscosity-Sensitive Solvatochromic Fluorescent Probes for Lipid Droplets Staining

open access: yesBiosensors, 2022
Lipid droplets (LDs) are simple intracellular storage sites for neutral lipids and exhibit important impact on many physiological processes. For example, the changes in the polar microenvironment inside LDs could affect physiological processes, such as ...
Mao-Hua Wang   +3 more
doaj   +1 more source

Ultrastable Self‐Cross‐linkable Electro‐Optic Materials Based on a Bisanthracene Scaffold

open access: yesAdvanced Electronic Materials, EarlyView.
A novel bisanthracene‐based self‐cross‐linkable electro‐optic chromophore (TD2) is developed. TD2 exhibits a high r33 of 141 pm/V and a cross‐linked Tg up to 195 °C, retaining 99.75% of its initial EO response after 500 h at 85 °C, showing record‐high thermal stability for single‐molecule self‐cross‐linking EO materials.
Xingtao Wang   +6 more
wiley   +1 more source

Solvent, substituents and pH effects towards the spectral shifts of some highly colored indicators [PDF]

open access: yesJournal of the Serbian Chemical Society, 2017
The solvatochromic responses of six indicators namely Sudan orange, Alizarin yellow R, Aurin tricarboxylic acid, Alizarin yellow GG, Titan yellow and Eriochrome black-T, dissolved in seven solvents of different polarities, have been measured at room ...
Masoud Mamdouh S.   +2 more
doaj   +1 more source

Reichardt’s Dye-Based Solvent Polarity and Abraham Solvent Parameters: Examining Correlations and Predictive Modeling

open access: yesLiquids, 2023
The concept of “solvent polarity” is widely used to explain the effects of using different solvents in various scientific applications. However, a consensus regarding its definition and quantitative measure is still lacking, hindering progress in solvent-
William E. Acree, Andrew S. I. D. Lang
doaj   +1 more source

What is Solvatochromism?

open access: yes, 2016
Solvatochromism is commonly used in many fields of chemical and biological research to study bulk and local polarity in macrosystems (membranes, etc.), or even the conformation and binding of proteins.
Aurora Muñoz-Losa (1728580)   +3 more
core   +1 more source

Principles and Applications of Solvatochromism [PDF]

open access: yesApplied Spectroscopy, 2001
T he term solvatochromism is used to descr ibe the pronounced change in position and sometimes intensity of a UVvisible absorption band following a change in the polarity of the medium. When absorption spectra are measured in solvents of different polarity it is found that not only the position but also the intensity and shape of the absorption band ...
Shalini Nigam, Sarah Rutan
openaire   +1 more source

Solvatochromism in Solvent Mixtures: A Practical Solution for a Complex Problem

open access: yesLiquids
Many reactions are carried out in solvent mixtures, mainly because of practical reasons. For example, E2 eliminations are favored over SN2 substitutions in aqueous organic solvents because the bases are desolvated.
Omar A. El Seoud   +2 more
doaj   +1 more source

Solvatochromism and Reversible Solvent Exchange Phenomena in Solvatomorphic Organic Chromophore Crystals

open access: yes, 2023
Solvatomorphs or solvates are common in pharmaceutical compounds, and solvatochromism is often reported in solution. The present study reports eight solvates of (Z)-3-(3-hydroxy-4-methoxy phenyl)-2-(4-nitrophenyl) acrylonitrile, a π-conjugated push–pull ...
Anil Kumar (105720)   +2 more
core   +1 more source

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