Tag: 400-500

On October 31, 1994, Inaba, Minoru; Ogumi, Zempachi; Takehara, Zen-ichiro published an article.Synthetic Route of 52243-87-5 The title of the article was Application of the solid polymer electrolyte method to organic electrochemistry XVII. Indirect electrochemical debromination using viologens as microscopic phase-transfer mediators. And the article contained the following:

Solid polymer electrolyte (SPE) composite electrodes using a perfluorinated ion-exchange membrane (Nafion), which is known to be microscopically separated into hydrophilic and hydrophobic domains, were prepared Various N,N’-dialkyl-4-4′-bipyridinium salts (viologens) were incorporated in the SPE composite electrodes as phase transfer mediators. Electrochem. debromination of meso-1,2-dibromo-1,2-diphenylethane was carried out on the SPE composite electrodes. The results were compared with those obtained in an emulsion system consisting of water and dichloromethane. Of the viologen compounds tested, Pr viologen was the most effective mediator for the SPE composite electrode, while octyl viologen dibromide was the most effective mediator in the emulsion system. The active species for the debromination in the emulsion system is a doubly reduced neutral form of viologen that was generated by the disproportionation of cation radicals. The disproportionation constant, Kd, of octyl viologen cation radical in a two-phase system consisting of water and dichloromethane is 809. The reaction mechanism on the SPE composite electrode was discussed, and probably the active species was generated by disproportionation at the microscopically heterogeneous interface between the hydrophilic and hydrophobic domains of the Nafion. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Synthetic Route of 52243-87-5

The Article related to indirect electrochem debromination phase transfer mediator, dibromodiphenylethane electrochem debromination composite electrode, viologen dibromodiphenylethane electrodebromination, catalyst viologen dibromodiphenylethane electrodebromination, disproportionation octylviologen radical cation and other aspects.Synthetic Route of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On November 30, 1996, Kim, Sung Hoon; Bae, Jin Seok; Hwang, Seok Hwan; Gwon, Tae Sun; Doh, Myung Ki; Park, Chul published an article.Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide The title of the article was Electrochromic properties of symmetric and asymmetric viologens. And the article contained the following:

Electrochromic properties of several viologen derivatives were examined by the cyclovoltametric and chronoamperometric methods. The electrochromic properties of 1,1′-diethyl-4,4′-bipyridinium dibromide(EV), 1,1′-dipropyl-4,4′-bipyridinium dibromide(PV), 1,1′-dibutyl-4,4′-bipyridinium dibromide(BV) and 1-butyl-1′-ethyl-4,4′-bipyridinium dibromide(EBV) were studied using an propylenecarbonate/methanol solution with Bu4NBF4 as supporting electrolyte. A monomer-dimer equilibrium might explain the observation that EV and EBV cation radical solutions shows violet under an applied voltage of 1.73̃.0 V but blue under open-circuit condition. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

The Article related to viologen electrochromism cyclic voltammetry chronoamperometry, diethylbipyridinium dibromide electrochromism cyclic voltammetry chronoamperometry, dipropylbipyridinium dibromide electrochromism cyclic voltammetry chronoamperometry, dibutylbipyridinium dibromide electrochromism cyclic voltammetry chronoamperometry and other aspects.Name: 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ding, Tao; Wang, Xiao-Xian; Zhang, Meng; Ou, Si-Meng; Hu, Tian-Ju published an article in 2017, the title of the article was Four new coordination polymers based on a pyridinetetracarboxylate ligand: syntheses, structures and high CO2/CH4 separation.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid And the article contains the following content:

Four new coordination polymers, [Zn(TPTA)0.5(BIBP)] (1), [Mn(TPTA)0.5(BIBP)0.5(DMF)] (2), [Zn1.5(TPTA)]·DMF·H2O (3), and [Cd1.5(TPTA)]·DMF·2H2O (4) (H4TPTA = 5,5′-(pyridine-2,5-diyl)diisophthalic acid, BIBP = 4,4′-bis(imidazol-1-yl)biphenyl), have been synthesized under solvothermal conditions and fully characterized. Single-crystal X-ray diffraction anal. revealed that complex 1 is a three-dimensional (3D) 3-fold interpenetrating architecture with (4·64·8)2(42·62·82) topol. Complex 2 possesses a 3D 2-fold interpenetrating framework based on binuclear Mn2 units with (412·63) topol. Both complexes 3 and 4 exhibit trinuclear 3D non-interpenetrating (4,8)-connected networks with (46)2(412·612·84) topol. The fluorescence properties of 1, 3 and 4 have been also measured. Importantly, gas adsorption studies for 1-4 show highly selective adsorption of CO2 over CH4. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

The Article related to zinc manganese cadmium pyridineisophthalate imidazolebiphenyl complex preparation thermal stability, crystal structure zinc manganese cadmium pyridineisophthalate imidazolebiphenyl complex, photoluminescence zinc manganese cadmium pyridineisophthalate imidazolebiphenyl complex, gas adsorption zinc manganese cadmium pyridineisophthalate imidazolebiphenyl complex and other aspects.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem