Results 41 to 50 of about 16,085 (237)

Beyond the Fixed Charge: A New On‐Tissue Derivatisation Strategy Employing Photoionisable Chromophores for Mass Spectrometry Imaging of Amino‐Containing Metabolites

Angewandte Chemie, EarlyView.
We introduce a novel chemical derivatisation strategy for the UV‐activated detection of elusive metabolites. Incorporation of a tocopherol‐active chromophore allows for the detection of tagged analytes as photoionised radical cations, selectively induced by a 266 nm laser.
Sofia R. McGowan, Andrew J. Tague, Ashna A. Kumar, Marie Ranson, Christopher J. T. Hyland, Shane R. Ellis   +5 more
wiley   +2 more sources

Development of a novel, multifunctional, membrane-interactive pyridinium salt with potent anticancer activity [PDF]

The synthesis and biological evaluation of a novel pyridinium salt is reported. Initial membrane interaction with isolated phospholipid monolayers was obtained with the pyridinium salt, and two neutral analogues for comparison, and the anticancer effects
Patil-Sen, Yogita, Warr, Tracy, Rowther, Farjana, Snape, Timothy James, Fahs, Sara, Dennison, Sarah Rachel   +5 more
core   +1 more source

Tandem dinucleophilic cyclization of cyclohexane-1,3-diones with pyridinium salts

Beilstein Journal of Organic Chemistry, 2013
The cyclization of cyclohexane-1,3-diones with various substituted pyridinium salts afforded functionalized 8-oxa-10-aza-tricyclo[7.3.1.02,7]trideca-2(7),11-dienes.
Mostafa Kiamehr, Firouz Matloubi Moghaddam, Satenik Mkrtchyan, Volodymyr Semeniuchenko, Linda Supe, Alexander Villinger, Peter Langer, Viktor O. Iaroshenko   +7 more
doaj   +1 more source

Tetrapyridinium μ-oxido-di-μ-sulfato-bis[chloridodioxidomolybdate(VI)]

Acta Crystallographica Section E, 2010
The title salt, (C5H6N)4[Mo2Cl2O5(SO4)2], comprises four pyridinium cations for each [(MoClO2)2(μ-O)(μ-SO4)2]4− anionic unit. The asymmetric unit consists of three aggregates of the empirical formula.
José A. Fernandes, Ana C. Gomes, Sónia Figueiredo, Sandra Gago, André D. Lopes, Martyn Pillinger, Paulo J. A. Ribeiro-Claro, Isabel S. Gonçalves, Filipe A. Almeida Paz   +8 more
doaj   +1 more source

Photochemical Reaction Discovery Enabled by the Dynamic Speciation of Copper Complexes

Angewandte Chemie, EarlyView.
A strategy for accelerated photochemical reaction discovery is reported that harnesses the dynamic speciation of copper complexes, driven by their labile metal–ligand bonds. This platform simplifies reaction screening by combining an earth‐abundant copper(II) salt with commercially available ligands, which reversibly generate multiple catalytic species
Alessio Regni, Siyu Liang, Supreeta Sen, Hailey Hendricks, Xijue Wu, Matthew V. Pecoraro, Jose B. Roque   +6 more
wiley   +2 more sources

Ionic Liquid Electrolytes for Extreme Temperature Conditions: Challenges and Perspective

Angewandte Chemie, EarlyView.
Ionic liquids (ILs) have gained great attention as safe electrolyte components in recent years. This review elucidates the temperature effects on IL‐based electrolytes from molecular configurations, physicochemical properties, and interfacial chemistry, raises the challenges and design strategies operating at low‐ and HT, providing valuable guidance ...
En Xie, Chengdong Liu, Xinghao Wang, Jian Wang, Zhen Chen, Huihua Li, Wenlong Cai, Hao Li, Yang Peng, Fanglin Wu, Stefano Passerini, Haolin Tang   +11 more
wiley   +2 more sources

Bis(4,4′-bipyridin-1-ium) cis-bis(1,2-dicyano-2-sulfidoethene-1-sulfinato-κ2S,S′)platinate(2−)

IUCrData
Crystals of the sulfinate-containing platinate salt, (C10H9N2)2[Pt(C4N2O2S2)2], were obtained from a solution of [Pt(4,4′-bpy)2(mnt)] after a long period with minimal light (4,4′-bpy is 4,4′-bipyridine and mnt is maleonitriledithiolate). In the crystals,
Claire E. Welton, Eric W. Reinheimer, Bradley W. Smucker   +2 more
doaj   +1 more source

Asymmetric Hydrogenation of 3‐Substituted Pyridinium Salts

Chemistry – A European Journal, 2016
AbstractThe use of an equivalent amount of an organic base leads to high enantiomeric excess in the asymmetric hydrogenation of N‐benzylated 3‐substituted pyridinium salts into the corresponding piperidines. Indeed, in the presence of Et3N, a Rh‐JosiPhos catalyst reduced a range of pyridinium salts with ee values up to 90 %.
M. Renom-Carrasco, GAJEWSKI, PIOTR, PIGNATARO, LUCA LUIGI, J. De Vries, U. Piarulli, C. Gennari, L. Lefort   +6 more
openaire   +4 more sources

Sulfur‐Free Ultrahigh‐Refractive‐Index Polymers Enabled by Densely Packed Oxygen‐Bridged Dibenzofuran‐Cardo Architectures

Advanced Functional Materials, EarlyView.
A new class of sulfur‐free, oxygen‐bridged dibenzofuran‐based polymers is developed for ultrahigh‐refractive‐index applications. The rigid π‐extended architecture and enhanced molecular polarizability enable exceptional optical performance, combining refractive indices up to 1.848 with high Abbe numbers and full visible transparency. This work offers a
Hend A. Hegazy, Gyeongsoo Kim, Sooyoung Lee, Mohamed R. Elmasry, Youn‐Chul Kim, Changsik Song   +5 more
wiley   +1 more source

2-Amino-3-(hydroxymethyl)pyridinium 2-benzoylbenzoate monohydrate

Acta Crystallographica Section E, 2012
In the title hydrated salt, C6H9N2O+·C14H9O3−·H2O, the dihedral angle between the benzene rings of the 2-benzoylbenzoate anion is 82.04 (14)°, while the angles between the aromatic ring of the pyridinium ...
Mustafa Odabaşoğlu, Osman Ozan Avinç, Hakkı Yasin Odabaşoğlu, Orhan Büyükgüngör   +3 more
doaj   +1 more source