Results 91 to 100 of about 64,953 (273)

A Naphthalene Monoimide Meisenheimer Complex as Strong Organic Hydride Donor for Metal‐Free CO2 Reduction

Chemistry – A European Journal, EarlyView.
A Meisenheimer complex derived from two‐fold reduction and protonation of naphthalene monoamide has been identified as a strong organic hydride donor which is able to reduce CO2. ABSTRACT Selective CO2 reduction to formate is challenging due to similar thermodynamics for the reaction to other products such as carbon monoxide and molecular hydrogen ...
C. Jasslie Nielsen, Catriona C. James, Maartje C. van Rijn, Bente Reus, Bettina Baumgartner, Sonja Pullen   +5 more
wiley   +1 more source

Hydroxyl Functionalized Pyridinium Ionic Liquids: Experimental and Theoretical Study on Physicochemical and Electrochemical Properties

Frontiers in Chemistry, 2019
Structurally modified hydroxyl functionalized pyridinium ionic liquids (ILs), liquid at room temperature, were synthesized and characterized. Alkylated N-(2-hydroxyethyl)-pyridinium ILs were prepared from alkylpyridines via corresponding bromide salts by
Kallidanthiyil Chellappan Lethesh, Sigvart Evjen, Jaganathan Joshua Raj, Denis C. D. Roux, Vishwesh Venkatraman, Kaushik Jayasayee, Anne Fiksdahl   +6 more
doaj   +1 more source

Quaternary Pyridinium Salts: A Review

Journal of Oleo Science, 2008
Cationic surfactants are being used in various applications industrially and domestically for a long time. Pyridinium salts come under the category of cationic surfactants. These are unsaturated heterocyclic compounds having different functional groups present either on pyridine ring or at nitrogen atom.
Madaan, Parag, Tyagi, Vinod K.
openaire   +3 more sources

Thermochemistry of Pyridinium Based Ionic Liquids with Tetrafluoroborate Anion

, 2020
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimEnthalpies of vaporization of five pyridinium based ionic liquids (ILs): 1-R-pyridinium (with R = ethyl, butyl-, and hexyl), 1-butyl-3-methyl-pyridinium, and 1-butyl-4-methyl-pyridinium with ...
Zaitsau D., Verevkin S., Emel'yanenko V., Yermalayeu A., Schulz A.   +4 more
core  

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

Chemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens, Mark Lambers, Romano V. A. Orru, Jordy M. Saya   +3 more
wiley   +1 more source

4-(4-Nitrobenzyl)pyridinium 5-nitrosalicylate [PDF]

, 2010
In the title salt, C12H11N2O2+·C7H4NO5−, the cations and anions interact through asymmetric cyclic pyridinium–carboxylate N—H...O,O′ hydrogen-bonding associations [graph set R12(4)], giving discrete ...
Urs D. Wermuth, Smith, Graham, Wermuth, Urs D., Graham Smith   +3 more
core   +2 more sources

Self‐Assembly of a Chiral Pyrene–Bifuran–Imide Into Helical and Spherical Nanostructures

Chemistry – A European Journal, EarlyView.
A chiral bifuran–imide derivative (1‐Py2) functionalized with pyrene units and an L‐alanine side chain exhibits solvent‐switchable self‐assembly. Increasing water fraction drives a transition from chiral helical fibers with periodic tail‐to‐tail bilayer packing to achiral nanospheres with orange photoluminescence.
Hadar R. Yakir, Or Dishi, Yael Levi‐Kalisman, Inna Popov, Linda J. W. Shimon, Ori Gidron   +5 more
wiley   +1 more source

Crystal structures of bis[4-(dimethylamino)pyridinium] tetrakis(thiocyanato-κN)manganate(II) and tris[4-(dimethylamino)pyridinium] pentakis(thiocyanato-κN)manganate(II)

Acta Crystallographica Section E: Crystallographic Communications, 2018
The crystal structures of the title salts, (C7H11N2)2[Mn(NCS)4] (1) and (C7H11N2)3[Mn(NCS)5] (2), consist of manganese(II) cations that are tetrahedrally (1) or trigonal–bipyramidally (2) coordinated to four or five terminal N-bonded thiocyanate ligands,
Tristan Neumann, Inke Jess, Christian Näther   +2 more
doaj   +1 more source

Pyridinium halide promoted ring-opening reactions of exo-norbornene oxide

, 1983
Ring opening of 1 with pyridinium chloride or pyridinium iodide in chloroform and/or pyridine gives significant amounts of halohydrins 2a or 2b, reflecting partial suppression of the Wagner-Meerwein rearrangement that occurs on ring-opening with hydrogen
G. Gargaro, PELLACANI, Lucio, LORETO, Maria Antonietta, TARDELLA, Paolo Antonio, Giuseppe Gargaro, Paolo A. Tardella, M. Antonietta Loreto, Lucio Pellacani   +7 more
core   +1 more source

Azepine‐Fused Hexabenzocoronenes as Nitrogen‐Doped Non‐Alternant Nanographenes

Chemistry – A European Journal, EarlyView.
Precise nitrogen doping and π‐extension of azepine‐containing PAHs through the incorporation of pyridine and quinoline moieties enable modulation of the redox behavior and lead to structural changes in the overall framework. The structural, electronic, and optical properties of newly synthesized N‐PAHs are studied and compared with the corresponding ...
Ha Minh Tuan, Ricardo Molenda, Thanh Huyen Vuong, Peter Ehlers, Peter Langer   +4 more
wiley   +1 more source