Tag: 400-500

On August 31, 1993, Kamogawa, Hiroyoshi; Nanasawa, Masato published an article.Related Products of 52243-87-5 The title of the article was Effect of temperature on the color developed by near ultraviolet light for 4,4′-bipyridinium salts (viologens) embedded in poly(1-vinyl-2-pyrrolidone) matrix. And the article contained the following:

Thermal stability of the colors developed by UV light for 4,4′-bipyridinium salts (viologens) embedded in the glass-sandwiched poly(1-vinyl-2-pyrrolidone) is dominated by the kind of counter anion. Temperature increase resulted in either no or slight changes of the colors developed for the major viologens, whereas it resulted in bleaching for some viologen sulfonates. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Related Products of 52243-87-5

The Article related to bipyridinium salt photochromism vinylpyrrolidone polymer, thermal stability color photoproduct viologen polyvinylpyrrolidone, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.Related Products of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kato, Chuzo; Kuroda, Kazuyuki; Sugawara, Yoshiyuki; Miyata, Hirokatsu published an article in 1987, the title of the article was Synthesis of montmorillonite-viologen intercalation compounds and photochromism.HPLC of Formula: 52243-87-5 And the article contains the following content:

Photochromic behavior of viologen I (R = Pr, n-heptyl, benzyl, phenethyl) intercalated into the layers of montmorillonite with poly(vinylpyrrolidone) (PVP) and poly(vinyl alc.) (PVA) was studied. When irradiated with a Hg lamp, the intercalation compounds turned blue to give radical cations, whereupon PVP and PVA served as electron donors for reduction of I. The radical cations generated in montmorillonite were more stable than those in the PVP matrix. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).HPLC of Formula: 52243-87-5

The Article related to photoreduction viologen montmorillonite polymer matrix, intercalation compound viologen montmorillonite photochromism, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.HPLC of Formula: 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 15, 1987, Kamogawa, Hiroyoshi; Suzuki, Tsuyoshi published an article.Category: pyridine-derivatives The title of the article was Photochromism of viologen crystals. And the article contained the following:

Some viologen crystals bearing a p-toluenesulfonate anion as a counter ion exhibit reversible photoreductions (photochromism) either in air or in vacuum. In a poly(N-vinyl-2-pyrrolidone) matrix all investigated viologens indicated reversible photocolor developments. Amphoteric ions such as 1,1′-bis(3-sulfonatoporpyl)-4,4′-bipyridinium also developed colors with high stabilities. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Category: pyridine-derivatives

The Article related to photochromism viologen crystal toluenesulfonate counterion, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Photochromic, Thermochromic, and Electrochromic Imaging Systems and other aspects.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Mortimer, Roger J.; Dillingham, Joanne L. published an article in 1997, the title of the article was Electrochromic 1,1′-dialkyl-4,4′-bipyridinium-incorporated Nafion electrodes.Application of 52243-87-5 And the article contains the following content:

The sym. 1,1′-dialkyl-4,4′-bipyridynium salts (alkyl = Me, Et, Pr, Bu, n-pentyl, n-hexyl) can be electrostatically incorporated into Nafion films to produce electrochromic electrodes. A trend from purple to pink in the color of the radical-cation redox state is observed This has been interpreted by in situ visible absorption spectroelectrochem. measurements as being due to a higher incidence of radical-cation dimers in the Nafion films with increase in alkyl chain length. Response times for coloration are shorter than for bleaching, owing to the slower phys. diffusion of the radical-cation dimers. The 1,1′-di-n-heptyl-4,4′-bipyridinium system was not incorporated into the Nafion structure and impede extensive incorporation into the bulk of the anionic polyelectrolyte. The presence of an inner Prussian blue layer in a Prussian blue/Nafion (1,1′-dialkyl-4,4′-bipyridinium) bilayer configuration permits five-color polyelectrochromicity at a single electrode. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Application of 52243-87-5

The Article related to nafion alkylbipyridinum salt electrochromic electrode, electrochromism nafion incorporated alkylbipyridinum salt, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Photochromic, Thermochromic, and Electrochromic Imaging Systems and other aspects.Application of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 28, 1997, Kim, Sung Hoon; Bae, Jin Seok; Hwang, Seok Hwan; Gwon, Tae Sun; Doh, Myung Ki published an article.Electric Literature of 52243-87-5 The title of the article was Dimer formation of viologen derivatives and their electrochromic properties. And the article contained the following:

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-ethyl-1′-Bu bipyridinium dibromide (EBV) were studied using a propylene-carbonate/methanol solution with Bu4NBF4 as the supporting electrolyte. A monomer-dimer equilibrium is proposed to explain the observation that the EV and EBV cation radical solutions are violet at an applied voltage of 1.7-3.0 V, but become blue in the open-circuit condition. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Electric Literature of 52243-87-5

The Article related to electrochromism viologen derivative monomer dimer equilibrium, viologen derivative cation radical electrochromic cell, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Photochromic, Thermochromic, and Electrochromic Imaging Systems and other aspects.Electric Literature of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Yan-Qin; Tan, Qing-Hua; Liu, Hou-Ting; Wei, -Sun; Liu, Zhi-Liang published an article in 2015, the title of the article was A luminescent europium MOF containing Lewis basic pyridyl site for highly selective sensing of o-, m- and p-nitrophenol.Related Products of 1431292-15-7 And the article contains the following content:

A new luminescent two-dimensional Eu metal-organic framework [Eu6(L)3(HL)2(H2O)10]·10H2O·x(solvent) (1) was successfully prepared by the solvothermal reaction of Eu(NO3)3·6H2O and the multidentate π-conjugated ligand H4L [H4L = (5,5′-(pyridine-2,5-diyl)bis(isophthalic acid))] which has a Lewis basic pyridyl site. The solid sample of 1 emits high bright red light which can be readily observed by the naked eye when excited at 358 nm at ambient temperature The luminescence of finely ground 1 particles dispersed in EtOH can be sensitively and selectively quenched by adding trace amounts of o-, m- and p-nitrophenol (NP), which reveals that 1 can be used as a luminescence sensor for the detection of o-, m- and p-NP. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Related Products of 1431292-15-7

The Article related to europium pyridinediylbisisophthalate mof solvothermal preparation crystal structure luminescence, nitrophenol luminescence sensor europium pyridinediylbisisophthalate mof and other aspects.Related Products of 1431292-15-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On February 21, 1995, Inaba, Minoru; Osa, Yumi; Ogumi, Zempachi published an article.Related Products of 52243-87-5 The title of the article was Raman spectroscopic analysis of electrochemical behavior of propylviologen in Nafion. And the article contained the following:

The electrochem. and Raman spectroscopic characteristics of propylviologen incorporated into Nafion film coated on a silver electrode were studied. The results were compared with those on silver in solutions containing Triton X-100, cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) micelles. Propylviologen incorporated into Nafion showed unusual electrochem. and Raman spectroscopic behavior. The half-wave potential for the 2nd step was shifted in the neg. direction with respect to that in an aqueous solution, and only a small amount of the doubly reduced form was detected by Raman spectroscopy. Similar behavior was observed in the anionic SDS micellar solution From the observed similarity, the residence sites of propylviologen in Nafion are discussed. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Related Products of 52243-87-5

The Article related to raman spectroscopy electrochem behavior propylviologen nafion, silver electrode nafion film incorporated propylviologen, micellar solution propylviologen reduction silver electrode and other aspects.Related Products of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Tan, Qing-Hua; Wang, Yan-Qin; Guo, Xiao-Yu; Liu, Hou-Ting; Liu, Zhi-Liang published an article in 2016, the title of the article was A gadolinium MOF acting as a multi-responsive and highly selective luminescent sensor for detecting o-, m-, and p-nitrophenol and Fe3+ ions in the aqueous phase.Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid And the article contains the following content:

A microporous Gd-MOF, [Gd6(L)3(HL)2(H2O)10]·18H2O·x(solvent) (1), was successfully synthesized by a solvothermal reaction between Gd(NO3)3·6H2O and the multidentate π-conjugated ligand, H4L, which has a Lewis basic pyridyl site (H4L = 5,5′-(pyridine-2,5-diyl)isophthalic acid). The crystal structure shows that compound 1 consists of Gd3 units, which are further interlinked by multicarboxylate ligands to form a 2-dimensional network. A solid sample of 1 emits bright blue light, which can be assigned to H4L ligand-centered emission. The luminescence of finely ground particles of 1 dispersed in H2O shows high sensitivity and selectivity towards trace amounts of o-, m-, and p-nitrophenol (NP) and Fe3+ ions with good linearity, which indicates that 1 can be used as a multi-responsive luminescence sensor for the detection of o-, m-, and p-NP and Fe3+ ions in an aqueous system. The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

The Article related to gadolinium mof preparation structure luminescence indicator nitrophenol iron ion, crystal structure gadolinium pyridinediylisophthalate mof preparation luminescent indicator nitrophenol and other aspects.Application In Synthesis of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 30, 1979, Brown, Norman M. D.; Cowley, David J.; Hashmi, Mahoud published an article.Synthetic Route of 52243-87-5 The title of the article was Kinetic studies of the photoreduction of 4,4′-di-n-alkylbipyridylium salts by alkanols in aqueous solution. And the article contained the following:

The photoreduction of ≤10-3 M solutions of I (R = Me, Et, Pr, Bu, pentyl, hexyl, heptyl; X = halide) by RCH(OH)R1 (II; R = H, R1 = Me, Et, Pr, Bu; R = R1 = Me) on irradiation at 254 nm was studied. Triplet excited I react initially with the alc. to give an exciplex which by H atom transfer gives a cation radical. Halide ions exerted a strong quenching effect, and the quantum yield of photoreduction was greatly influenced by the R groups in I and the R and R1 groups in II. 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 alkylbipyridylium photoreduction alc kinetics, bipyridylium alkyl photoreduction alc kinetics, reduction photochem alkylbipyridylium kinetics, substituent effect alkylbipyridylium photoreduction and other aspects.Synthetic Route of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 31, 2021, Si, Xue-Jian; Jia, Jing; Bao, Yu-Liang; Wu, Ya-Pan; Liu, Yunling; Dong, Wen-Wen; Zhao, Jun; Li, Dong-Sheng published an article.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid The title of the article was Superprotonic conductivity of a 3D anionic metal-organic framework by synergistic effect of guest [Me2NH2]+ cations, water molecules and host carboxylates. And the article contained the following:

A new 3D anionic metal-organic framework material, namely, [Me2NH2]2[Cd3(L)]·2H2O (1, H4L = 2,5′-di(3′,5′-dicarboxylphenyl)pyridine) has been synthesized under solvothermal conditions and characterized by single crystal x-ray diffraction, PXRD, thermogravimetric anal. and proton conduction investigation. In 1, the adjacent Cd(II) ions are joined to form a trinuclear [Cd3(COO)8] secondary building unit (SBU) by eight bridging carboxylate groups of L4- ligands. The trinuclear [Cd3(COO)8] SBUs are connected by L4- ligands into a 3D (4,8)-connected framework with 1D channels. Most interestingly, due to the guest [Me2NH2]+ cations, water mols. and carboxylates sites are lined the pore channels, 1 possesses a remarkable proton conductivity of 1.12 x 10-1 S cm-1 at 60° and 98% RH, which is comparable to com. available Nafion. The mechanism of proton conduction was also well discussed. 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 dicarboxylphenylpyridine cadmium metal organic framework preparation crystal mol structure, superprotonic conductivity three dimensional anionic metal organic framework, synergistic guest cation water mol host carboxylate and other aspects.Safety of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem