Category: pyridine-derivatives

On June 3, 1992, Karaman, Rafik; Blasko, Andrei; Almarsson, Orn; Arasasingham, Ramesh; Bruice, Thomas C. published an article.Electric Literature of 636-73-7 The title of the article was Symmetrical and unsymmetrical quadruply aza-bridged, closely interspaced, cofacial bis(5,10,15,20-tetraphenylporphyrin)s. 2. Synthesis, characterization, and conformational effects of solvents. And the article contained the following:

Title compounds I [X = NR, R = 3-pyridylsulfonyl (R1), 1-methylpyridinium-3-sulfonyl (R2), CONH2, cyano, tosyl; X = OCO2, R = R1, cyano] have been synthesized and fully characterized by 2-dimensional 1H-1H NMR (COSY), 2-dimensional 13C-1H NMR, fast-atom-bombardment mass spectrometry, UV/vis, IR, and fluorescence spectral techniques. It was established, on the basis of 1H NMR, UV/vis, and emission spectrophotometries, that I (X = NR, R = R1, R2, tosyl) exist in more than one conformational in DMSO and in only one sym. conformation in CHCl3. Their biszinc complexes and tetraprotonated derivatives exist in one conformation regardless of the solvent. These observations have been attributed to an interaction between DMSO and the pyrrolic N-H protons of the porphyrin cores which is inhibited by metalation or protonation. Mol. dynamics calculations reveal that the intracavity interactions of I (X = NR, R = R1) with DMSO are more important than the intercavity interactions which result in discrete, unsym. conformations of the dimer. In contrast, I (X = OCO2, R = R1, cyano; X = NR, R = cyano, CONH2) do not show any conformational changes upon switching from CHCl3 to DMSO. This is attributed to the long interplanar distances calculated for the porphyrin dimers which prevent intracavity coordination of DMSO with both porphyrin moieties. 1H NMR variable-temperature experiments of I (X = NR, R = R1) in DMSO show that the conformation of the dimer is greatly affected by temperature While at room temperature I (X = NR, R = R1) exists in more than one conformation, at higher temperatures (150°) only one conformation is populated. It is proposed that at room temperature, the existence of a H-bonding network between DMSO and the dimer results in more than one conformation, while at higher temperatures the network is destroyed to furnish an average conformation. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Electric Literature of 636-73-7

The Article related to porphyrin dimer preparation conformation, Biomolecules and Their Synthetic Analogs: Corrinoids, Porphyrins, and Bilines and other aspects.Electric Literature of 636-73-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 31, 2008, Ramya, G.; Renugadevi, C.; Rao, Chepuri R. K.; Trivedi, D. C. published an article.Application In Synthesis of Pyridine-3-sulfonic acid The title of the article was Investigations on pyridine-3-sulfonic acid doped polyaniline and polypyrrole: Metal loading through dopant molecules. And the article contained the following:

Polyniline and polypyrrole were chem. and electrochem. synthesized in presence of pyridine-3-sulfonic acid. These conducting polymers were characterized by FT-IR, UV-vis, XRD, TGA and SEM techniques. Polyaniline showed a conductivity of 4 × 10-4 S/cm while polypyrrole exhibited a conductivity of 6.2 × 10-2 S/cm. The presence of pyridine ring in the dopant enabled the polymers to anchor Pd/or PdO through which the composite can work as catalytic material. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Application In Synthesis of Pyridine-3-sulfonic acid

The Article related to pyridine sulfonic acid dopant polyaniline polypyrrole metal conductivity elec, Plastics Manufacture and Processing: Physical Properties and Testing Methods and other aspects.Application In Synthesis of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On August 10, 2004, Winther-Jensen, Bjorn; Chen, Jun; West, Keld; Wallace, Gordon published an article.Application In Synthesis of Pyridine-3-sulfonic acid The title of the article was Vapor Phase Polymerization of Pyrrole and Thiophene Using Iron(III) Sulfonates as Oxidizing Agents. And the article contained the following:

Vapor phase polymerization is a versatile technique that can be used to obtain highly conducting coatings of conjugated polymer on both conducting and nonconducting substrates. This is demonstrated here by preparation of polypyrrole, polybithiophene, and polyterthiophene, coatings that otherwise must be prepared electrochem. in order to achieve the desired high conjugation. The method is based on the use of organic ferric sulfonates as oxidant as these salts easily form smooth, noncrystalline films. By proper choice of the sulfonate anion, the oxidizing power of the ferric salt can be varied over a wide range. The described technique can easily be adapted to different patterning techniques. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Application In Synthesis of Pyridine-3-sulfonic acid

The Article related to pyrrole thiophene vapor phase polymerization iron sulfonate oxidant, Chemistry of Synthetic High Polymers: Ring-Opening and Other Polymerizations and other aspects.Application In Synthesis of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 20, 2018, Fahrni, Christoph J.; McCallum, Adam M.; Morgan, Michael Thomas published a patent.Quality Control of Ethyl 6-cyanopicolinate The title of the patent was Preparation of substituted phenylthiazole compounds as zinc-selective fluorescent probes for emission-ratiometric imaging. And the patent contained the following:

The title compounds I [Z = II; X1-X4 = (independently) N and CH; Y1 = NR4, S, and O; Y2 = NR5, S, and O; R = Ar, OR4, N((CH2)qAr)2; R1-R4 = (independently) H, halo, alkyl, etc.; R5 = Cn-alkyl optionally substituted with OR4 or Ar; Ar = (independently) aryl and heteroaryl; n = 1-3; q = 1-3; and wherein any one of the aforementioned can be substituted or unsubstituted], useful for detecting zinc in a biol. sample (two-photo excitation microscopy (TPEM) or conventional fluorescence microscopy), were prepared E.g., a multi-step synthesis of III, starting from Et 6-bromopicolinate, was described. The latter was tested for Zn(II)-binding affinity and its analyte selectivity (data given). To evaluate the Zn(II)-dependent ratiometric response of III within the chem. complexity of a live cell, the authors performed a perfusion experiment with NIH 3T3 mouse fibroblasts as model system (data given). The experimental process involved the reaction of Ethyl 6-cyanopicolinate(cas: 97483-79-9).Quality Control of Ethyl 6-cyanopicolinate

The Article related to phenylthiazole preparation zinc selective fluorescent probe emission ratiometric imaging, two photo excitation microscopy tpem phenylthiazole preparation zinc probe, Heterocyclic Compounds (More Than One Hetero Atom): Thiazoles, Isothiazoles and other aspects.Quality Control of Ethyl 6-cyanopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 10, 2015, Tsakova, V.; Ilieva, G.; Filjova, D. published an article.Electric Literature of 132-20-7 The title of the article was Role of the anionic dopant of poly(3,4-ethylenedioxythiophene) for the electroanalytical performance: electrooxidation of acetaminophen. And the article contained the following:

Poly(3,4-ethylenedioxythiophene) (PEDOT) films were synthesized in the presence of various anions and surfactants (perchlorate, dodecylsulfate (DDS), polysterenesulfonate (PSS) and poly(2-acrylamido-2-methyl-1-propanesulfonate (PAMPS), and polyoxyethylene-10-laurylether (PLE))) on glassy C electrodes. The electrocatalytical activity for acetaminophen electrooxidation was studied depending on the type of dopant and the polymerization charge of the PEDOT films. All PEDOT-coated electrodes show a marked electrocatalytical effect for this reaction. After exposure to acetaminophen, a new redox pair is observed to appear in the voltammetric curves measured in supporting electrolyte for all PEDOT-coated electrodes. The dopant used in the PEDOT synthesis is found to play an important role for these redox currents with PEDOT/PSS-coated electrodes showing the smallest ones. The study of the role of the polymerization charge (i.e. the thickness of the polymer films) reveals that electrodes coated with thin PEDOT films perform better than those coated with thicker polymer films. Electroanal. detection of acetaminophen is effective by thin film PEDOT/PSS-coated electrodes. The concentration range of linear response is 50 μM dm-3 to 1 mM dm-3 in linear sweep voltammetry experiments and 5 μM dm-3 to 65 μM dm-3 in DPV experiments The corresponding LODs are 10 μM dm-3 and 0.3 μM dm-3, resp. PEDOT/PSS-coated electrodes were used to determine acetaminophen in four medications containing various addnl. components. The experimental process involved the reaction of N,N-Dimethyl-3-phenyl-3-(pyridin-2-yl)propan-1-amine maleate(cas: 132-20-7).Electric Literature of 132-20-7

The Article related to anionic dopant polyethylenedioxythiophene electroanalytical determination electrooxidation acetaminophen, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Electric Literature of 132-20-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On March 10, 1994, Feng, Minhui; Li, Wen; Liang, Zhaoxi published an article.Related Products of 52243-87-5 The title of the article was Electroredox behavior of alkyl viologen compounds. And the article contained the following:

Electroredox behavior of alkyl viologens and polyviologens has been investigated by using differential pulse polarog. The alkyl groups of viologen compounds influence the reduction potentials and the film forming property of reduced products on the electrode. Compared with the low mol. alkyl viologen compounds, the first reduction potentials (E1) of alkyl polyviologens are rather pos., the potential differences (ΔE) of two-step reduction potentials are larger. The halogen anions of supporting electrolytes influence the reduction potentials of viologen compounds, the order is I- > Br- > Cl- > F-. 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 alkyl viologen derivative electrochem redox reaction, reduction potential viologen halide electrolyte, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Related Products of 52243-87-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On December 31, 2021, Oh, In-Chan; Kim, Ho-Young; Hyun, Soong-Keun; Byoun, Young-Min published an article.Quality Control of Pyridine-3-sulfonic acid The title of the article was Characterization of palladium electrodeposition in ammonia-free electrolyte with additives. And the article contained the following:

Electrodeposition of Pd provides excellent chem. and low-contact resistance with good elec. properties, such as different types of elec. contacts in the electronics industry. The conventional Pd plating process utilizes ammonia-based electrolytes. Ammonia was added continuously to maintain the optimum pH range in Pd electrolyte. In addition, the harmful and strong odor of the evaporating ammonia necessitates the use of a ventilator. A further disadvantage is that the brass substrate is corroded by ammonia vapor, and the corrosion products can contaminate the electrolytes, thereby changing the technol. properties of the deposited plating for the worse. Ethylenediamine has been proposed as an alternative to ammonia; however, Pd electrodeposition occurs as microcracks via hydrogen evolution. In this study, the effects of Pd electrolyte on ethylenediamine as a complexing agent and the properties of various additives are investigated to improve c.d. and internal stress in Pd electrodeposition that occurs on a brass substrate. Therefore, complexing agents such as 3-pyridine sulfonic acid, sodium nicotinate, butyne 1-4 diol, and sodium allylsulfonate are selected as additives, to serve as an alternative to ammonia in Pd electrolyte. In this study, the properties of electrodeposited Pd with various additives were examined The effect of additives on Pd electrolytes can be classified as dense surfaces without defects such as microcracks and pinholes, which improved surface roughness and corrosion resistance. Particularly, Pd electrolyte using sodium nicotinate has relatively improved surface roughness and properties. Pd electrolyte was optimized under ammonia-free conditions by the addition of sodium nicotinate. The experimental process involved the reaction of Pyridine-3-sulfonic acid(cas: 636-73-7).Quality Control of Pyridine-3-sulfonic acid

The Article related to palladium electrodeposition ethylenediamine electrolyte additive surface roughness elec property, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Quality Control of Pyridine-3-sulfonic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On January 31, 1996, Yi, He; Xiaoyun, Wang; Zhaoxi, Liang published an article.Formula: C16H22Br2N2 The title of the article was The association behavior of alkyl viologens in electroredox studied by in-situ spectroscopy. And the article contained the following:

The association behavior of first reduced state of alkyl viologens and corresponding polyviologens(V+) were studied by in-situ spectroscopy. In electroreduction process, V.+ of alkyl viologens exist predominantly in the association form on the electrode surface, this phenomenon is attributed to the absorption of V.+ on the electrode. V.+ of polyviologens with shorter alkyl groups also exist mainly in the association form. However, V.+ of polyviologens with longer alkyl groups exist mainly in the monomeric form because the flexible segments may weaken the V.+ association The association behavior of electroreduction were compared with that of photoreduction as well as chem. reduction In addition, the effect of β-cyclodextrin inclusion on the association behavior of V.+ in electroreduction was studied. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Formula: C16H22Br2N2

The Article related to alkyl viologen polyviologen electroredox association, visible spectra viologen polyviologen, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Formula: C16H22Br2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On July 15, 2022, Zhen, Guangjin; Wang, Furong; Yin, Biaolin published a patent.Electric Literature of 2229858-27-7 The title of the patent was Preparation of cyclobutane fused spiro indoline compounds as antitumor agents. And the patent contained the following:

The invention discloses the preparation of cyclobutane fused spiro indoline compounds with general formula I or II as antitumor agents [where X=O, S, CH = CH; R1=H, halogen group, ether group, aryl, siloxane or alkyl; R2=alkyl, siloxane, alkynyl or heterocyclic; R3=acetyl, p-methoxybenzyl, methylthiomethyl, tervaleryl, benzyloxycarbonyl, tert butoxycarbonyl, benzyl or p-methoxyphenyl], which has the advantages of simple preparation method, mild conditions, environmental protection and suitable for large-scale preparation For example, compound I (X=S, R1=H, R2=CH2CH2OCH3, R3=Ac) was prepared by photocatalytic cyclization of 1-acetyl-N-(2-methoxyethyl)-N-(thiophen-2-ylsulfonyl)-1H-indole-2-carboxamide. The title compounds have good inhibitory activity on hcc1806 cells and can be used to prepare anticancer agents. The experimental process involved the reaction of 4,4′-Bis(trifluoromethyl)-2,2′-bipyridinebis[3,5-difluoro-2-[5-methyl-2-pyridinyl)phenyl] iridium(III) hexafluorophosphate(cas: 2229858-27-7).Electric Literature of 2229858-27-7

The Article related to photocatalysis cyclization fused indoline isothiazole preparation treatment human cancer, Heterocyclic Compounds (More Than One Hetero Atom): Thiazoles, Isothiazoles and other aspects.Electric Literature of 2229858-27-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

On October 31, 1994, Satoh, Hideharu; Ohno, Hiroyuki; Tokuda, Koichi; Ohsaka, Takeo published an article.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide The title of the article was A study on diffusional behavior of propyl viologen in poly(ethylene oxide) polymer solvents based on a combined use of steady-state cyclic voltammetry and potential-step chronoamperometry. And the article contained the following:

The diffusion coefficient (DPV2+) and the concentration (CaPV2+) of the actually electroactive PV2+ in the poly(ethylene oxide) (PEO, average mol. weight: 400) media containing 0.1M LiClO4 and various concentrations of propylviologen dibromide (PVBr2) could be sep. estimated without previous knowledge of either, based on a combined use of steady-state cyclic voltammetry at carbon fiber electrodes (diameter: 9 μm) and potential-step chronoamperometry at glassy carbon electrodes (diameter: 1 mm) as a function of PVBr2 concentration (CPV2+ = 2-20mM) and temperature (10-60°). Both CaPV2+ and DPV2+ significantly varied with CPV2+. CPV2+ values were smaller than CPV2+, indicating that all of the dissolved PVBr2 are not actually electroactive. DPV2+ decreased with increasing CPV2+ (and CaPV2+), and the charge transport in the PEO matrix thus occurs not via the electron-hopping process between PV2+ and PV+ (the monocation state of PV2+), but via the phys. diffusion of PV2+. Further, it became apparent that at CPV2+ > 5mM the temperature dependence of DPV2+ is not the Arrhenius type and follows the VTF equation, i.e., PV2+ ions are transported along with the segmental motion of the PEO chains. Based on the DSC measurements of the PEO-LiClO4 (0.1M)-PVBr2 complexes, their glass transition temperatures decrease with increasing CPV2+, suggesting that PVBr2 function as a plasticizer. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

The Article related to propylviologen diffusion peo, redox electrochem propylviologen peo lithium perchlorate, Electrochemistry: Electrodes, Electrode Reactions, and Electrode Potentials and other aspects.Quality Control of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem