Month: November 2022

On February 29, 1984, Kamogawa, Hiroyoshi; Masui, Toshiaki; Amemiya, Suguru published an article.Electric Literature of 52243-87-5 The title of the article was Organic solid photochromism by photoreduction mechanism: viologen embedded in solid polar aprotic polymer matrix. And the article contained the following:

Reversible photocolor development of viologens embedded in poly(N-vinyl-2-pyrrolidone) (I) films, a typical polar aprotic solid matrix, was affected by the kinds of viologen cation as well as the paired anion. The color development in the corresponding low-mol.-weight solvents is connected closely to the solubility of viologens in these solvents; viologens are highly sensitive in the polar aprotic solvents in which they have poor solubilities, such as N-methyl-2-pyrrolidone and hexamethylphosphoric triamide. These facts confirm the color-development mechanism consisting of electron transfer to the photoexcited viologen cation from the paired anion in polar aprotic solid matrixes, such as I. 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 photochromism viologen aprotic polymer matrix, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.Electric Literature of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ortiz-Sanchez, Juan Manuel; Gelabert, Ricard; Moreno, Miquel; Lluch, Jose M.; Anglada, Josep M.; Bofill, Josep M. published an article in 2010, the title of the article was Bipyridyl derivatives as photomemory devices: A comparative electronic-structure study.Related Products of 75449-26-2 And the article contains the following content:

The two isoelectronic bipyridyl derivatives [2,2′-bipyridyl]-3,3′-diamine (BP(NH2)2) and [2,2′-bipyridyl]-3,3′-diol (BP(OH)2) are exptl. known to undergo very different excited-state double proton transfer processes that result in fluorescence quantum yields that differ by four orders of magnitude. Such differences have been theor. explained in terms of topog. features in the potential energy surface and the likely presence of conical intersections. The hypothetical hybrid compound [2,2′-bipyridyl]-3-amin-3′-ol (BP(OH)(NH2)) presents intermediate photochem. features of its “ancestors”. In this report we analyze the photochem. properties of a whole family of “dark” (not fluorescent) states that can be accessed from each bipyridyl derivative upon irradiation of light of a given wavelength and their potential application as photomemory devices. In the light of our d. functional theory (DFT), time-dependent DFT (TDDFT), and complete active space SCF (CASSCF) calculations, BP(NH2)2 is the more likely candidate to become a photomemory device. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Related Products of 75449-26-2

The Article related to bipyridyl derivative photomemory electronic structure scf calculation dft, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.Related Products of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On April 1, 2015, Yu, Jiancan; Cui, Yuanjing; Wu, Chuan-De; Yang, Yu; Chen, Banglin; Qian, Guodong published an article.COA of Formula: C21H13NO8 The title of the article was Two-Photon Responsive Metal-Organic Framework. And the article contained the following:

Two-photon processing presents a facile means to tailor the properties of materials in three-dimensions. A two-photon responsive metal-organic framework (MOF) has been realized through the incorporation of a photoactive linker into a MOF via a multivariate strategy. The resulting MOF exhibits a significant one-photon and two-photon excited fluorescence change in response to UV light and IR femtosecond laser, enabling spatial modulation of the fluorescence property of the MOF. It thus demonstrates the capacity of two-photon patterning and imaging inside the crystal, and the formation of three-dimensional two-photon excited fluorescent structure in a high resolution The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).COA of Formula: C21H13NO8

The Article related to two photon fluorescence zinc pyridinediyldiisophthalato mof crystal structure, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.COA of Formula: C21H13NO8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 4, 2019, Li, Hanning; Yang, Yang; He, Cheng; Zeng, Le; Duan, Chunying published an article.Application of 1431292-15-7 The title of the article was Mixed-Ligand Metal-Organic Framework for Two-Photon Responsive Photocatalytic C-N and C-C Coupling Reactions. And the article contained the following:

A multiple-photon photochem. process breaks the existing energy limitation of visible-light photocatalysis. Through careful incorporation of both bis(3,5-dicarboxyphenyl)pyridine and bis(3,5-dicarboxyphenyl)methylpyridinium ligands into a single metal-organic framework (MOF), we report herein photocatalytic C-N and C-C oxidative coupling reactions that evidenced the direct two-photon response process. Time-dependent luminescence-decay studies demonstrated that the framework reached the same excited state by a two-photon absorption process as that reached via a single-photon absorption process, and the excited state could activate substrates even under NIR-light irradiation Under 660 nm light-emitting diode (LED) irradiation, both the photooxidative C-N coupling reaction of benzylamine to form benzylidene-1-phenylmethanamine and the C-C coupling reaction between nitromethane and N-phenyltetrahydroisoquinoline were accelerated directly in a heterogeneous manner. Control experiments suggested that minimal byproducts were formed under the NIR-light irradiation compared to those of the UV light catalytic reactions. Importantly, photon intensity-dependent studies exhibited a nonlinear correlation between catalytic efficiency of multivariate MOFs (MTV-MOFs) and photon power intensity, verifying the two-photon responsive nature, which indicated that metal-organic framework with high d. and ordered photoactive motifs could enhance the two-photon absorption ability, thereby improving photocatalytic efficiency even under LED irradiation The experimental process involved the reaction of 5,5′-(Pyridine-2,5-diyl)diisophthalic acid(cas: 1431292-15-7).Application of 1431292-15-7

The Article related to ligand metal organic framework photon responsive photocatalysis, coupling reaction, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.Application of 1431292-15-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 3, 2010, Ortiz-Sanchez, Juan M.; Gelabert, Ricard; Moreno, Miquel; Lluch, Jose M. published an article.Quality Control of [2,2′-Bipyridine]-3,3′-diamine The title of the article was Modulating the Photochemistry of Bipyridylic Compounds by Symmetric Substitutions. And the article contained the following:

A quantum electronic study of the effect of substituents on (2,2′-bipyridyl)-3,3′-diol and (2,2′-bipyridyl)-3,3′-diamine is presented. A large difference in the photochem. behavior between the original and the substituted selected systems is expected. For the sake of simplicity, the study is restricted to the sym. bi-substituted compounds: fluorine, the more electroneg. atom and thus a strong σ-acceptor but also a weak π-donor group, and NO2, a strong π-acceptor substituent. Among the large set of compounds studied, two receive special attention: 5,5′-dinitro-(2,2′-bipyridyl)-3,3′-diamine and 6,6′-difluoro-(2,2′-bipyridyl)-3,3′-diol. While in the former case the nitro substitution transforms (2,2′-bipyridyl)-3,3′-diamine, previously suggested to behave as a photomemory material, into a simple fluorescent species, the latter substitution turns (2,2′-bipyridyl)-3,3′-diol into a fresh new candidate for a photomemory device. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Quality Control of [2,2′-Bipyridine]-3,3′-diamine

The Article related to quantum electronic study substituent effect photochem bipyridyldiol bipyridyldiamine, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.Quality Control of [2,2′-Bipyridine]-3,3′-diamine

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 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

Tahara, Hironobu; Yonemura, Hiroaki; Harada, Satoko; Nakashima, Akio; Yamada, Sunao published an article in 2012, the title of the article was Photoinduced electron-transfer reactions and magnetic field effects on the decay rates of a photogenerated biradical from zinc porphyrin-viologen linked compounds in an ionic liquid.COA of Formula: C16H22Br2N2 And the article contains the following content:

Fluorescence and transient absorption spectra of zinc-porphyrin (ZnP)-viologen linked compounds with various methylene groups indicate that intramol. electron-transfer from the singlet or triplet excited state of ZnP to viologen occurred and a biradical was generated in the ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate) at various temperatures (283-343 K). The decay rate constants of the biradical decreased in 0-0.2∼0.5 T and became constant in 0.2∼0.5-1 T. Unique effects of temperature and methylene chain length on electron-transfer and magnetic field effects were observed and are probably due to the properties of the ionic liquid as compared with benzonitrile. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).COA of Formula: C16H22Br2N2

The Article related to photoinduced intramol electron transfer zinc porphyrin viologen dyad kinetics, magnetic field zinc porphyrin viologen dyad photochem ionic liquid, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Radiation Chemistry and Photochemistry and other aspects.COA of Formula: C16H22Br2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 1, 2013, Zhao, Hong-Wu; Yue, Yuan-Yuan; Li, Hai-Long; Song, Xiu-Qing; Sheng, Zhi-Hui; Yang, Zhao; Meng, Wei; Yang, Ze published an article.Synthetic Route of 75449-26-2 The title of the article was Novel axially unfixed biaryl-based water-compatible organocatalysts: design, synthesis and their asymmetric catalysis in direct aldol reactions in water. And the article contained the following:

A family of novel axially unfixed biaryl-based, water-compatible bifunctional organocatalysts I [R = 4-MeC6H4, 4-MeC6H4, 1-naphthyl; X = CH, N] were designed and synthesized for asym. catalytic direct aldol reactions in water. These organocatalysts are comprised of prolinamide, aromatic sulfonamide and biaryl motifs. Under the optimal reaction conditions, one organocatalyst in particular delivered excellent stereocontrol (up to 99% ee and 99:1 dr) in direct aldol reactions of cyclohexanone with a variety of aromatic aldehydes in water. The experimental process involved the reaction of [2,2′-Bipyridine]-3,3′-diamine(cas: 75449-26-2).Synthetic Route of 75449-26-2

The Article related to asym aldol addition biaryl catalyst preparation, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Amides, Amidines, Imidic Esters, Hydrazides, and Hydrazonic Esters and other aspects.Synthetic Route of 75449-26-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On June 9, 2016, Chen, Austin; Bravo, Yalda; Stock, Nicholas; Pedram, Bijan; Jacintho, Jason; Clark, Ryan C.; Truong, Yen published a patent.Safety of Methyl 2-amino-5-chloroisonicotinate The title of the patent was Thio-substituted benzamides as antiviral agents for the treatment of treatment HBV infection and their preparation. And the patent contained the following:

The invention includes a method of inhibiting, suppressing or preventing HBV infection in an individual in need thereof, comprising administering to the individual a therapeutically effective amount of at least one compound of formula I. Compounds of formula I wherein each R1, R2, and R3 are halo; R4 is (un)substituted C3-7 cycloalkyl (un)substituted C1-6 alkyl-C3-7 cycloalkyl; and pharmaceutically acceptable salts thereof, are claimed. Example compound II was prepared by thioetherification of N-(3,4,5-trifluoromethylphenyl)-4-fluoro-3-iodobenzamide with 1-(mercaptomethyl)cyclopropylacetic acid. The invention compounds were evaluated for their antiviral activity (some data given). The experimental process involved the reaction of Methyl 2-amino-5-chloroisonicotinate(cas: 1227002-03-0).Safety of Methyl 2-amino-5-chloroisonicotinate

The Article related to thiobenzamide preparation antiviral treatment hbv infection, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Amides, Amidines, Imidic Esters, Hydrazides, and Hydrazonic Esters and other aspects.Safety of Methyl 2-amino-5-chloroisonicotinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem