Results 71 to 80 of about 12,878 (240)

Preparing composite materials from matrices of processable aromatic polyimide thermoplastic blends [PDF]

, 1991
Composite materials with matrices of tough, thermoplastic aromatic polyimides are obtained by blending semi-crystalline polyimide powders with polyamic acid solutions to form slurries, which are used in turn to prepare prepregs, the consolidation of ...
Baucom, Robert M., Gleason, John R., Johnston, Norman J., St.clair, Terry L.   +3 more
core   +1 more source

Xylose Acetals ‐ a New Class of Sustainable Solvents and Their Application in Enzymatic Polycondensation

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Novel organic solvents with an unmodified carbohydrate core were synthesised both from D‐xylose and directly from biomass and were successfully used as reaction media for lipase biocatalysts to synthesise aliphatic and aromatic polyesters. Abstract The use of organic solvents in academic research and industry applications is facing increasing ...
Anastasia O. Komarova, Cicely M. Warne, Hugo Pétremand, Laura König‐Mattern, Johannes Stöckelmaier, Chris Oostenbrink, Georg M. Guebitz, Jeremy Luterbacher, Alessandro Pellis   +8 more
wiley   +1 more source

Aggregation-induced emission effect on turn-off fluorescent switching of a photochromic diarylethene

Beilstein Journal of Organic Chemistry, 2019
Background: Diarylethenes are well-known photochromic compounds, which undergo cyclization and cycloreversion reactions between open- and closed-ring isomers.
Luna Kono, Yuma Nakagawa, Ayako Fujimoto, Ryo Nishimura, Yohei Hattori, Toshiki Mutai, Nobuhiro Yasuda, Kenichi Koizumi, Satoshi Yokojima, Shinichiro Nakamura, Kingo Uchida   +10 more
doaj   +1 more source

Probing hydrogen-bonding in binary liquid mixtures with terahertz time-domain spectroscopy: a comparison of Debye and absorption analysis. [PDF]

, 2015
Terahertz time-domain spectroscopy is used to explore hydrogen bonding structure and dynamics in binary liquid mixtures, spanning a range of protic-protic, protic-aprotic and aprotic-aprotic systems.
Bräuer, Pierre, D'Agostino, Carmine, Gladden, Lynn F, Li, Ruoyu, Tan, Nicholas Y, Zeitler, J Axel   +5 more
core   +2 more sources

Structural Design of MOF‐Based and MOF‐Derived Composites for Oxygen Evolution Electrocatalysis: Materials Innovation for Energy and Environmental Sustainability

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review provides an overview of recent developments in metal organic framework (MOF)‐based and MOF‐derived composites for efficient oxygen evolution reaction. This review also emphasizes the structural design of electrocatalyst, active site optimization, and emerging prospects of their use in practical electrolyzer systems.
Bhagyashri B. Kamble, Aditi De, Seung Joo Jang, Arun Karmkar, Venkatachalam Vinothkumar, Niyaz Mujawar, Subrata Kundu, Tae Hyun Kim   +7 more
wiley   +1 more source

Fluorescence and photostability studies of anthracene-9-carboxylic acid in different media

International Journal of Photoenergy, 2000
Electronic absorption and fluorescence spectra of anthracene-9-carboxylic acid (ANCA) were studied in different homogeneous solvents, binary protic/aprotic solvent mixtures and in heterogeneous solutions of the cationic cetyltrimethyl ammonium bromide ...
M. S. A. Abdel-Mottaleb, H. R. Galal, A. F. M. Dessouky, M. El-Naggar, D. Mekkawi, S. S. Ali, G. M. Attya   +6 more
doaj   +1 more source

Electrochemistry of Dihalogenated Nicotonic Acids in Aqueous and Aprotic Media [PDF]

, 1986
The electrochemical reduction of several 2,5- and 5,6- dihalonicotinic acids have been studied in dimethyl sulfoxide as well as in aqueous buffers of different pH.
Battles, Lourie A., Dixon, Tappi A., Setliff, Frank L., Shaikh, Ali U.   +3 more
core   +2 more sources

Detection of Radical Anions by Electrospray‐Ionization Mass Spectrometry

Helvetica Chimica Acta, EarlyView.
The present study investigates the ability of electrospray‐ionization mass spectrometry to detect radical anions. For neutral analytes with high electron affinities, radical anions are formed by cathodic reduction and can be easily observed. In contrast, analytes with lower electron affinities require the addition of a reducing agent for the generation
Niklas F. Eisele, Daniel Kösters, Konrad Koszinowski   +2 more
wiley   +1 more source

Exploring the emissive properties of new azacrown compounds bearing aryl, furyl or thienyl moieties: a special case of chelation enhancement of fluorescence upon interaction with Ca2+, Cu2+ or Ni2+ [PDF]

, 2010
Three new compounds bearing furyl, aryl or thienyl moieties linked to an imidazo-crown ether system (1, 2 and 3) were synthesized and fully characterized by elemental analysis, infrared, absorption and emission spectroscopy, X-ray crystal diffraction ...
Baptista, Rosa M. F., Costa, Susana P. G., Lodeiro, Carlos, Oliveira, Elisabete, Raposo, M. Manuela M.   +4 more
core   +1 more source

Role of High Fidelity Vs. Low Fidelity Experimental Data in Machine Learning Model Performance for Predicting Polymer Solubility

Macromolecular Rapid Communications, EarlyView.
The performance of machine learning models for classifying polymer solubility improves when a high‐fidelity experimental dataset is used compared to a low‐fidelity experimental dataset. This has important implications for justifying the value of spending additional time and resources preparing detailed experimental datasets.
Mona Amrihesari, Manali Banerjee, Raul Olmedo, Blair Brettmann   +3 more
wiley   +1 more source