Results 111 to 120 of about 60,247 (222)

From Charge‐Transfer Adducts to (Tri)Halide‐Templated Supramolecular Cages: Covalent vs Ionic Products in the Reactions of Pyridin‐4‐ylthio‐Substituted Tetrathiafulvalene With Dihalogens and Interhalogens

open access: yesChemistry – A European Journal, EarlyView.
The reactions between tetra(pyridin‐4‐ylthio)tetrathiafulvalene and Br2/I2/ICl/IBr led to a variety of products, including a rare example of neutral 1:4 CT adduct and ionic products showing supramolecular cage motifs at (tri)halide templates. The nature of the reaction products was elucidated based on XRD analysis, Raman spectroscopy and QTAIM, NCI ...
Anna Caria   +6 more
wiley   +1 more source

Valorization of oat hulls and spent coffee grounds into pyridinium-modified granular adsorbents for water purification

open access: yesSustainability Science and Technology
Agro- and food-waste biomass such as oat hull (Oh) or spent coffee ground (SCG) biomass can yield sustainable adsorbents for water treatment. However, adsorbents in powdered form often face constraints in practical applications (column applications due ...
Bernd G K Steiger   +2 more
doaj   +1 more source

Electrochemiluminescence of Heteroleptic Iridium(III) Complexes Featuring Substituted 2,4‐diphenylpyridinato Ligands

open access: yesChemistry – A European Journal, EarlyView.
Five heteroleptic iridium(III) complexes bearing cyclometalated 2,4‐diphenylpyridinato ligands were synthesized and their electrochemiluminescence (ECL) investigated. Two different coreactants were evaluated: tri‐n‐propylamine and benzoyl peroxide under anodic and cathodic potentials, respectively.
Ovini Jayawardana   +6 more
wiley   +1 more source

Multivalent RNA‐Cleaving Agents on a Cubic Octameric Silsesquioxane Core

open access: yesChemistry – A European Journal, EarlyView.
RNA‐cleaving agents on a cubic octameric silsesquioxane core were synthesized and characterized. Several catalytic systems of these structures were screened using hexaribonucleotide models. The best systems were then further used to study their catalytic efficiency in cleaving a HER2 mRNA model sequence. The induced cleavage sites were also determined.
Hanni Haapsaari, Iris Tuomi, Pasi Virta
wiley   +1 more source

Redox‐Tuned Oxycarbamates Enable Divergent C─N and C─C Functionalization of Indolizines Under Photoredox Catalysis With Green Light

open access: yesChemistry – A European Journal, EarlyView.
Nonafluoromesitylsulfonyl (Nms)‐substituted oxycarbamates are introduced as redox‐lowered radical precursors for green‐light photoredox synthesis. Selective N─O bond cleavage generates amidyl radicals that directly aminate indolizines in DMF, whereas DMSO promotes 1,2‐hydrogen atom transfer (HAT) to α‐amino carbon‐centered radicals and C─C bond ...
Kevin Klaus Stefanoni, René Wilhelm
wiley   +1 more source

Push-pull systems based on pyridinium betaines.

open access: yes, 2012
Byla provedena literarni rešerše mapujici využiti a synteticke postupy vedouci k push-pull systemům na bazi pyridinium betainů. Využiti těchto latek spočiva předevšim v jejich NLO vlastnostech.
Miklík, David
core   +1 more source

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

open access: yesIUCrData
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   +2 more
doaj   +1 more source

The Radical Chemistry of 2,3‐Diguanidinopyridines: Coordination and Visible‐Light Photochemistry

open access: yesChemistry – A European Journal, EarlyView.
Substitution at the pyridine core of 2,3‐diguanidinopyridines was used to develop novel redox‐active molecules with three interconvertible redox states. They are applied as redox‐active ligands in coordination chemistry. Visible‐light irradiation of the pyridine N‐benzylated molecules leads to photoconversion to a higher‐energetic isomer.
Hanna Koepcke   +3 more
wiley   +1 more source

Pyridinium Compounds

open access: yes, 1994
Methods for using novel quaternary pyridinium compounds in inhibiting acetylcholinesterase in mammals, specifically using the quaternary pyridinium compounds in the prophylaxis and treatment of organophosphate poisoning and mammalian dementia by ...

core  

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

open access: yesChemistry – 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   +5 more
wiley   +1 more source

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