72433-69-3

Upstream product

• 553-26-4 4,4'-bipyridine 
• 100-39-0 benzyl bromide 

Downstream Products

• 1227931-67-0 N-phenylmethyl-N'-methyl-4,4'-bipyridinium bromide iodide 
• 1227931-73-8 methyl-3-phenyl-7-(pyridin-4-yl)-indolizine-1-carboxylate 
• 1254831-22-5 C₂₅H₃₂N₂⁽²⁺⁾ 
• 70293-19-5 C₁₈H₁₈N₂⁽²⁺⁾ 
• 78335-15-6 1-benzyl-1'-heptyl-4,4'-bipyridinium bromide 

Relevant academic research and scientific papers

Heterogeneous viologen catalysts for metal-free and selective oxidations

Metal-free oxidation, a green chemistry process, has drawn significant attention from catalysis researchers. However, most oxidation processes are completed by homogeneous metal-free catalysts, whereas heterogeneous metal-free materials have been developed with limited successes. In this study, polymerized ionic networks (PINs) with N,N′-dialkyl-4,4′-bipyridinium units as heterogeneous viologen type of catalysts exhibited high efficiency in the oxidation of aromatic sulfides/alcohols to sulfoxides/aldehydes, respectively (conversion: >90%, selectivity: >95%). The catalytic performance of PINs originates from the electron-accepting ability of the viologen unit, which can reduce H2O2 into an active species. Especially, the synthesis of PIN catalysts is a one-step simple polymerization reaction between benzyl bromide and bipyridine in air. The metal-free heterogeneous feature, high selectivity, mild conditions (60 °C, 1 h), and the facile preparation of the catalyst make the current selective oxidation approach attractive.

Supramolecular Pseudorotaxane Polymers from Biscryptands and Bisparaquats

Five new bis(dibenzo-30-crown-10-based cryptand)s were synthesized, two of which (16 and 17) had long (12-atom), flexible spacers that led to cooperative complexation of dibenzyl paraquat TFSI (Kave = 4.36 × 105 M-1 for 17

Electrochemical saccharide recognition by a phenylboronic acid-terminated redox active self-assembled monolayer on a gold electrode

Phenylboronic acid-terminated viologen-carrying alkyl disulfide (1) and a reference compound 2 were designed and synthesized. Self-assembled monolayers of 1 on gold electrodes were found to function as a highly sensitive saccharide sensor in aqueous solut

BLACK ELECTROCHROMIC COMPOUND, AND ELECTROLYTE-INTEGRATED RADIATION CURABLE ELECTROCHROMIC COMPOSITION AND ELECTROCHROMIC DEVICE WHICH CONTAIN SAME

The present invention relates to an electrochromic compound, and an electrochromic composition and an electrochromic device, including the same. The electrochromic compound according to the present invention may achieve excellent black coloring effects and excellent curing characteristics, and thus may be used advantageously in an electrochromic device.

Microwave-assisted synthesis of symmetric and asymmetric viologens

Viologens are generally synthesized by N-alkylating 4,4′-bipyridine with alkyl halides. Under conventional heating conditions, however, their synthesis suffers from long reaction times and, often, low yields. In this work, symmetric and asymmetric viologe

Pyridinium salts and ylides as partial structures of photoresponsive Merrifield resins

Merrifield resin was treated with 4,4′-bipyridine and 2,4′-bipyridine, respectively, to give photochromic materials. On exposure to light, reversible color changes are observable. These resins also serve as indicators because reversible color changes are

Room-temperature thermotropic ionic liquid crystals: Viologen bis(triflimide) salts

Several dicationic salts with bis(triflimide) as counterions - otherwise known as viologens - were prepared by metathesis reaction of the corresponding viologen dibromides (diiodides) with lithium triflimide in a polar solvent. They were characterized for

N-phenacyl-N′-benzyl-4,4′-bipyridinium bromides and their ylides

N-Phenacyl-N′-benzyl-4,4′-bipyridinium and N-p-nitrophenacyl-N′-benzyl-4,4′-bipyridinium bromides were synthesized by the reaction of N-benzyl-4,4′-bipyridinium bromide with 2-bromoacetophenone and 2-p-nitrobromoacetophenone. Ylides of the above-mentioned diquaternarysalts were obtained by the "salt method". All compounds were characterized by elemental and spectral (IR, 1H-NMR) analysis.

Syntheses of a series of electron donor and electron acceptor derivatives

New electron donor and electron acceptor compounds have been prepared suitable for direct covalent attachment to a photosensitizer or other synthetic subunit. In each case, a saturated three-carbon chain separates a reactive functional group (an alkyl bromide, an amine, or an alcohol) from the electron donor (a phenylenediamine) or electron acceptor (a viologen).

The Synthesis and Electrochemical Study of New Electrochromic Viologen-based Materials

A range of diquaternary salts of 4,4'-bipyridine and 3,8-phenanthroline were prepared and subsequently screened using electrochemical and spectroscopic techniques.It was determined that the stability of the radical film deposited on cathodic reduction of aqueous solutions of these salts may be strongly influenced by symmetry, steric, and electronic factors.From this basis, it was possible to design a viologen, 1,1'-bis-(2-methylbenzyl)-2-methyl-4,4'-bipyridinium dibromide (9), having electrochromic properties for electronic display applications superior to those already in existence.A radical film of mixed composition was found to be less susceptible to ageing effects than films generated from the individual dicationic salts.