Results 31 to 40 of about 1,867 (199)

Reversible thermochromic systems based on a new library of flavylium spirolactone leuco dyes [PDF]

, 2023
Publisher Copyright: © 2023 The Author(s)The aim of this work was the design, synthesis, and characterization of new chromogenic spirolactone dyes based on a 2-phenyl-1-benzopyrylium (flavylium) backbone for further development of thermochromic smart ...
Spirache, Maria Angela, Tonicha Laia, César António, Marrec, Philippe, Dias Parola, António Jorge   +3 more
core   +1 more source

Allosteric Regulation of Photophysics and Binding in Oxazine‐macrocycle Complexes at Single‐molecule Resolution

Angewandte Chemie International Edition, EarlyView.
This work explores the interactions between the oxazine dye ATTO655 and two macrocyclic hosts using optical (single‑molecule) spectroscopy. Although ATTO655 forms a classical inclusion complex with cucurbit[8]uril (CB8), its interaction with p‑sulfonatocalix[4]arene (sCX4) leads to the formation of dim exclusion complexes.
Siyu Lu, Thomas‐Otavio Peulen, Hongbin Wu, Florian Lindemann, Despoina Kapiki, Rasmus Linser, Andreas Hennig, Thorben Cordes   +7 more
wiley   +1 more source

A Reversible 900 nm Near‐Infrared Photoswitch for Invisibly Writable 2D and 3D Displays

Angewandte Chemie International Edition, EarlyView.
The peri‐benzo[a]fluoranthenethioindigo (PBFT) photoswitch enables direct excitation with near‐infrared light up to 900 nm wavelengths. It delivers a high‐performance property profile including high‐contrast color changes between bright green and deep blue.
Elias Ciekalski, Henry Dube
wiley   +1 more source

A Method for Optical Quantification of Local Oxygen Limitations in Multiphase Bioreactors

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Spatial oxygen limitation is a major source of physiological stress and metabolic, scale‐dependent heterogeneity in aerobic bioprocesses. In gas‐liquid stirred tank reactors, oxygen availability is governed by hydrodynamics and mass transfer and is therefore inherently non‐uniform.
Ryan Rautenbach, Katharina Zörner, Jonas Barczyk, Marko Hoffmann, Ralf Takors, Michael Schlüter   +5 more
wiley   +1 more source

Color Development and Tribo-charging Characteristics of Leuco Dyes

Journal of the Japan Society of Colour Material, 2004
The color development and tribo-charging characteristics of the leuco dyes were investigated. Seven types of leuco dyes were dissolved into a styrene-acryl copolymer solution to prepare a dye-solution. When a prescribed amount of the t-butyl salicylate-Zn complex (SZC) was added to the dye-solution the solution developed color. The maximum absorbance A
Keiki SUGANAMI, Manabu TAKEUCHI, Toshihiko OGUCHI   +2 more
openaire   +2 more sources

UV-Activated Luminescence/Colourimetric O2 Indicator

International Journal of Photoenergy, 2008
An oxygen indicator is described, comprising nanoparticles of titania dispersed in hydroxyethyl cellulose (HEC) polymer film containing a sacrificial electron donor, glycerol, and the redox indicator, indigo-tetrasulfonate (ITS).
Andrew Mills, Cheryl Tommons, Raymond T. Bailey, M. Catriona Tedford, Peter J. Crilly   +4 more
doaj   +1 more source

Thermochromic Radiative Cooling Coatings with Robust Superhydrophobicity for Energy‐Efficient Buildings

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A scalable, color‐adaptive radiative cooling coating is developed to enable dynamic spectral regulation via a reversible thermochromic transition at ~45 °C and a high solar reflectance of 91.7%. The coating achieves 4.44 °C outdoor sub‐ambient cooling while providing robust superhydrophobicity and environmental durability through its micro/nano ...
Ziqi Li, Akbar Bashir, Chak‐Yin Tang, Gary Chi‐Pong Tsui, Yan Chen, Jie Cui, Xing Ouyang, Chen Liu, Dazhu Chen   +8 more
wiley   +1 more source

PRODUCTION OF MALACHITE GREEN BY OXIDATION OF ITS LEUCO BASE USING POTASSIUM PERSULPHATE, POTASSIUM PERMANGANATE AND MANGANESE DIOXIDE

, 2004
Malachite green dye was produced by oxidising the Malachite leuco base with some inorganic oxidants. Best product yield was obtained with manganese dioxide, while potassium permanganate gave better results than potassium persulphate.
UB Agunwa, EM Okonkwo, Agunwa, UB, Okonkwo, EM   +3 more
core   +1 more source

Relaxation Processes from the Highly Excited States in the Molecular Systems Based on the Methylene Blue [PDF]

Журнал нано- та електронної фізики, 2012
The theoretical and experimental studies of relaxation of the methylene blue molecules (MB) out of the highly excited states have allowed to show the existence of nonbinding potential surfaces, which correspond to excited σσS* and σσN* states, which ...
P.O. Kondratenko, T.M. Сакун, Yu.M. Lopatkin   +2 more
doaj  

Plasma Membrane‐Promoted Aggregation of BODIPY Dimers Enables Live‐Cell Super‐Resolution Imaging

Aggregate, Volume 7, Issue 5, May 2026.
BODIPY dimers are introduced as membrane probes exhibiting dynamic, environment‐dependent intermolecular interactions within lipid bilayers. Transient aggregation between molecules drives switching between open, H‐aggregated, and J‐aggregated states, enabling efficient blinking. This behavior allows dual‐color imaging, with green emission outlining the
Sonia Pfister, Sophie Walter, Pascal Didier, Mayeul Collot   +3 more
wiley   +1 more source