Results 81 to 90 of about 415,539 (315)

Complex Mixture Analysis of Organic Compounds in Yogurt by NMR Spectroscopy

Metabolites, 2016
NMR measurements do not require separation and chemical modification of samples and therefore rapidly and directly provide non-targeted information on chemical components in complex mixtures.
Yi Lu, Fangyu Hu, Takuya Miyakawa, Masaru Tanokura   +3 more
doaj   +1 more source

Palladium-Catalyzed Cascade Approach to 12-(Aryl)indolo[1,2- c ]quin­azolin-6(5 H )-ones [PDF]

, 2018
A straightforward one-pot approach to the synthesis of challenging 12-arylindolo[1,2-c]quinazolin-6(5H)-ones is described. Starting from readily available o-(o-aminophenylethynyl)trifluoroacetanilides, palladium-catalyzed aminoarylation of the triple ...
Arcadi, Antonio, Cacchi, Sandro, Fabrizi, Giancarlo, Ghirga, Francesca, Goggiamani, Antonella, Iazzetti, Antonia, Marinelli, Fabio   +6 more
core   +1 more source

Zwitterionic Self‐Assembled Monolayer for Simultaneous Noise Suppression and Hole Extraction in High‐Performance Near‐Infrared Organic Photodetectors

Advanced Functional Materials, EarlyView.
This study presents a new hole transporting material (HTM) mechanism for self‐assembled monolayers in near‐infrared organic photodetectors. The formation of zwitterions induces a strong electric field that significantly increases the work function of HTM‐coated indium tin oxide substrates. The devices exhibit low dark current and noise, along with high
Jiyoung Shin, Gyeong Min Lee, Juyeon Shin, Jaewoong Kim, Tae Hyuk Kim, Do Yeon Kim, Myeong In Kim, Kyeounghak Kim, Jae Won Shim, In Hwan Jung   +9 more
wiley   +1 more source

Development of identification test methods for triptorelin acetate and goserelin acetate substances using NMR spectroscopy

Регуляторные исследования и экспертиза лекарственных средств, 2019
The work is a continuation of the research on the use of NMR spectroscopy in the quality control of natural peptide hormone-based active substances and their synthetic analogues.
S. V Moiseev, N. E. Kuz’mina, A. I. Luttseva   +2 more
doaj   +1 more source

Deciphering Small Molecule Diffusion Parameters Across Light Responsive Polymersome Membranes

Advanced Functional Materials, EarlyView.
Light‐responsive polymersomes bearing donor–acceptor Stenhouse adducts (DASAs) enable programmable control over small‐molecule transport across synthetic membranes. By systematically varying DASA density, an optimal functionalization regime is identified that maximizes light‐gated permeability.
Farzina Matubbar, Beyzanur Kaya, Buse Ipek, Tenzin Dorjee, Shoghik Hakobyan, Mohamed Chami, Julien E. Gautrot, Omar Rifaie‐Graham   +7 more
wiley   +1 more source

A Gallium-based Chiral Solvating Agent Enables the Use of 1H NMR Spectroscopy to Differentiate Chiral Alcohols

iScience, 2019
Summary: In situ, direct 1H NMR chiral analysis by using chiral solvating agents is a convenient and efficient analytical technique. Here we developed a Ga-based chiral anionic metal complex for 1H NMR chiral analysis of alcohols.
Sumin Jang, Hyunwoo Kim
doaj   +1 more source

Iridium complexes bearing a PNP ligand, favoring facile C(sp^3)–H bond cleavage [PDF]

, 2011
Hydrogen iodide is lost upon reaction of PNP with IrI_3, where PNP = 2,6-bis-(di-t-butylphosphinomethyl)pyridine to give crystallographically characterized Ir(PNP)*(I)_2, which reacts with H_2 to give Ir(PNP)(H)(I)_2.
Goddard, William A., III, Lokare, Kapil S., Nielsen, Robert J., Periana, Roy A., Yousufuddin, Muhammed   +4 more
core   +1 more source

Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance

Advanced Functional Materials, EarlyView.
A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer, Emilia Fulajtar, Seema Agarwal   +2 more
wiley   +1 more source

Research on 1H NMR spectrum optimization of 2,3-benzodiazepines based on conformational isomerism

Results in Chemistry
To address the issue of multiple sets of signal peaks and irregular peak shapes in the 1H NMR spectra of some 2,3-benzodiazepines due to conformational isomerism, 1H NMR experiments were conducted using 2,3-benzodiazepines 1 as examples, with variations ...
Fei Zhang, Ya-Li Ding
doaj   +1 more source

5-Dimethylamino-1-phenylchromeno[2,3-c]pyrazol-4(1H)-one

Molbank, 2010
The title compound was prepared by treatment of 5-fluoro-1-phenylchromeno [2,3-c]pyrazol-4(1H)-one with aqueous dimethylamine. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, IR, MS) are presented.
Wolfgang Holzer, Angelika Ebner
doaj   +1 more source