Category: 636-73-7

Zhao, Chongjian published the artcileSyntheses, structures and photoluminescence of Cd(II) coordination polymers based on in situ synthesized bifunctional ligands, Name: Pyridine-3-sulfonic acid, the publication is Inorganic Chemistry Communications (2014), 30-35, database is CAplus.

By employing Cd(II) salt, NaN₃, and CN-(CH₂)_n-NC (n = 1, 2) and with the absence or presence of secondary ligands, four new cadmium coordination frameworks, named, {[Cd₄(btm)₄(H₂O)₂]·3H₂O}_n (1); [Cd₂(btm)₂(H₂O)]_n (2); [Cd₂(bte)(PMA)_0.5(H₂O)]_n (3); and [Cd(tzp)(2,2′-bipy)]_n (4) (H₂btm = bis(tetrazole) methane: H₂bte = 1,2-bis(tetrazole-5-yl)ethane; H₂tzp = 1H-tetrazolate-5-propionic acid; bipy = bipyridine; PMA = 1,2,4,5-benzenetetracarboxylic acid) were synthesized via in situ hydrothermal reaction. Single crystal x-ray diffraction reveals that compounds 1–3 are all three-dimensional (3D) frameworks. Compound 1 is constructed by Cd1- and Cd3-btm^2- layers and large bridging metalloligands. Compound 2 exhibits a 3D framework with two-dimensional (2D) Cd-btm^2- (adopting μ₆:κN1, N1′: κN2: κN3: κN4: κN3′: κN4’coordination mode) layers pillared by μ₃:κN1, N1′: κN2: κN4′ btm^2-. Compound 3 is built up by the Cd-bte^2- layers and the linker PMA, with left- and right-handed helical chains arranged alternately. It is notable that btm^2- takes on six different coordination modes in 1 and 2. Compound 4 represents a 2D layered framework, which can be simplified into a Shubnikov plane net (4.82̂) topol. network with 3-connected T shape linker tzp^2- ligands. In addition, the research results show that compounds 1–4 exhibit different fluorescent behaviors and thermal stabilities.

Inorganic Chemistry Communications published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C18H12FN, Name: Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Chesnokova, Alexandra N. published the artcileSynthesis and properties of composite membranes for polymer electrolyte membrane fuel cells, Application In Synthesis of 636-73-7, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2014), 251-256, database is CAplus.

The paper is devoted to the sol-gel synthesis of proton conductive organic-silicon composite membranes based on tetra-Et orthosilicate (TEOS) and copolymers of 2-methyl-5-vinylpyridine and vinyl chloride (MVP-VC), 2-methyl-5-vinylpyridine and vinyl acetate (MVP-VA), copolymers of ethylene glycol vinyl glycidyl ether and styrene (KS-1 and KS-2), and nitrogen-containing heteroaromatic derivatives of sulfonic acids: 2-phenyl-5-benzimidazolsulfonic acid (PBISA) and pyridine-3-sulfonic acid (PSA). Properties of synthesized membranes, such as proton conductivity, activation energy, ion exchange capacity, dimensional stability have been investigated.

Advanced Materials Research (Durnten-Zurich, Switzerland) published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Application In Synthesis of 636-73-7.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Reams, Steve G. published the artcileEffect of chelating agents and respiratory inhibitors on regulation of the cadA gene in Escherichia coli, Related Products of pyridine-derivatives, the publication is Archives of Microbiology (1997), 167(4), 209-216, database is CAplus and MEDLINE.

The cadA gene that encodes Lys decarboxylase in E. coli is induced by low pH and during anaerobic growth by Lys. Operon fusions of cadA to lacZ was used to investigate the effects of aeration on cadA regulation. When an insertion mutation in osmZ (= hns) was introduced, a cadA-lacZ fusion was derepressed in the presence of air to approx. the same level as seen during anaerobic growth. The pH-dependent regulation of cadA was not affected by osmZ. Introduction of mutations in rpoS, fur, or fnr had no effect on cadA expression. Defects in arcB or arcA largely abolished expression of cadA during anaerobic growth. Nonetheless, strains defective in both arcB and osmZ showed the same high cadA-lac expression in air as seen in the single osmZ derivatives Blocking the respiratory chain with mutations or chem. inhibitors also caused derepression of a cadA-lacZ fusion in air, while agents affecting the proton gradient had no effect. Derepression of cadA in air was also mediated by several chelating agents, in particular by methoxyindole carboxylic acid. Addition of Fe²⁺ overcame this effect. Chelating agents also abolished the expression during aerobic growth of several genes known to be under arcAB control and which are normally repressed during anaerobic growth but induced in the presence of air. This implies that the effect of chelating agents on cadA expression is mediated via the arcAB regulatory system.

Archives of Microbiology published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Related Products of pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Tanaka, Shunitz published the artcileMigration behavior of niacin derivatives in capillary electrophoresis, Related Products of pyridine-derivatives, the publication is Journal of Chromatography A (1995), 718(1), 233-7, database is CAplus.

The migration behavior of niacin derivatives was investigated by capillary zone electrophoresis (CZE) and micellar electrokinetic chromatog. (MEKC). When the pH of the buffer solution is lower than the pK_a of the pyridine ring in the niacin derivatives, they are pos. charged by protonation on the pyridine ring and migrate electrophoretically. The mobilities of niacin derivatives in CZE were controlled by the pH of the migrating buffer. Good separation of 13 niacin derivatives was achieved at pH 2.8. Further, to shorten the anal. time and to achieve a more complete separation, an investigation by MEKC using SDS micelles was performed. All 13 niacin derivatives were eluted within 30 min and a satisfactory separation was achieved.

Journal of Chromatography A published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C8H5F3N4, Related Products of pyridine-derivatives.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Oh, In-Chan published the artcileCharacterization of palladium electrodeposition in ammonia-free electrolyte with additives, Product Details of C5H5NO3S, the publication is Surface and Interface Analysis (2021), 53(12), 1035-1042, database is CAplus.

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.

Surface and Interface Analysis published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Product Details of C5H5NO3S.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Yang, Bing published the artcileSelf-Assembled Amphiphilic Water Oxidation Catalysts: Control of O-O Bond Formation Pathways by Different Aggregation Patterns, Name: Pyridine-3-sulfonic acid, the publication is Angewandte Chemie, International Edition (2016), 55(21), 6229-6234, database is CAplus and MEDLINE.

The oxidation of water to mol. oxygen is the key step to realize water splitting from both biol. and chem. perspective. In an effort to understand how water oxidation occurs on a mol. level, a large number of mol. catalysts have been synthesized to find an easy access to higher oxidation states as well as their capacity to make O-O bond. However, most of them function in a mixture of organic solvent and water and the O-O bond formation pathway is still a subject of intense debate. Herein, we design the first amphiphilic Ru-bda (H₂bda=2,2′-bipyridine-6,6′-dicarboxylic acid) water oxidation catalysts (WOCs) of formula [Ru^II(bda)(4-OTEG-pyridine)₂] (1, OTEG=OCH₂CH₂OCH₂CH₂OCH₃) and [Ru^II(bda)(PySO₃Na)₂] (2, PySO₃^–=pyridine-3-sulfonate), which possess good solubility in water. Dynamic light scattering (DLS), scanning electron microscope (SEM), critical aggregation concentration (CAC) experiments and product anal. demonstrate that they enable to self-assemble in water and form the O-O bond through different routes even though they have the same bda^2- backbone. This work illustrates for the first time that the O-O bond formation pathway can be regulated by the interaction of ancillary ligands at supramol. level.

Angewandte Chemie, International Edition published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C8H11NO, Name: Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Naskar, Gouranga published the artcileLigand-Enabled [3+2] Annulation of Aromatic Acids with Maleimides by C(sp³)-H and C(sp²)-H Bond Activation, Safety of Pyridine-3-sulfonic acid, the publication is Chemistry – A European Journal (2022), 28(39), e202200778, database is CAplus and MEDLINE.

Synthesis of tricyclic heterocyclic mols. I [R = 5-F, 5-Me, 5-CF₃, etc.; R¹ = Me, Et, Bn, etc.] with a free carboxylic group in a high atom- and step-economical manner via palladium-catalyzed [3+2] annulation of substituted benzoic acids with maleimides was described. The reaction proceeded via a dual C-H bond activation such as C(sp³)-H at the benzylic position and C(sp²)-H bond activation at the meta position of substituted aromatics An external ligand (MPAA) was crucial for the success of present protocol. Further, the decarboxylation and esterification of the free carboxylic acid group of observed products were carried out.

Chemistry – A European Journal published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Safety of Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Baker, Paul K. published the artcileThe synthesis of the first examples of water-soluble seven-coordinate complexes of tungsten(II), Safety of Pyridine-3-sulfonic acid, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1995), 1525-6, database is CAplus.

Reaction of the seven-coordinate complex [WI₂(CO)₃(NCMe)₂] with two equivalent of 4-HO₂CC₅H₄N in MeOH at room temperature gave the bis(pyridine-4-carboxylic acid) complex [WI₂(CO)₃(4-HO₂CC₅H₄N)₂] (1) in good yield, which, upon treatment with two equivalent of NaOH in EtOH, afforded the completely water soluble complex [WI₂(CO)₃(4-NaO₂CC₅H₄N)₂] (2) in good yield; reaction of the latter with an equimolar amount of 3-NaO₃SC₅H₄N yielded [WI₂(CO)₃(4-NaO₂CC₅H₄N)(3-NaO₃SC₅H₄N)], which represents the 1st room-temperature ligand-substitution reaction in H₂O of a metal carbonyl complex.

Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Safety of Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Chen, Li published the artcileAmide derivatives of Gallic acid: Design, synthesis and evaluation of inhibitory activities against in vitro α-synuclein aggregation, Application of Pyridine-3-sulfonic acid, the publication is Bioorganic & Medicinal Chemistry (2020), 28(15), 115596, database is CAplus and MEDLINE.

Gallic acid (GA), a natural phenolic acid, has received numerous attention because of its anti-oxidative, anti-inflammatory, and anti-cancer activity. More importantly, GA can act as an efficient inhibitor of α-Synuclein (α-Syn) aggregation at early stages. Nevertheless, some evidences suggest that GA is unlikely to cross the blood-brain barrier because of its high hydrophilicity. Hence, GA may not be considered as a promising candidate or entering brain and directly affecting the central nervous system. Accordingly, we have designed and synthesized a series of amide derivatives of GA, some of which possess appropriate lipophilicity and hydrophilicity with LogP (2.09-2.79). Meanwhile, these sheet-like conjugated compounds have good π-electron delocalization and high ability of hydrogen-bond formation. Some compounds have shown better in vitro anti-aggregation activities than GA towards α-Syn, with IC₅₀ down to 0.98μM. The valid modification strategy of GA is considered an efficient way to discover novel inhibitors of α-Syn aggregation.

Bioorganic & Medicinal Chemistry published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Application of Pyridine-3-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Yamada, Masanori published the artcileProton conductivity of zwitterionic-type molecular solids under intermediate temperature and anhydrous conditions, HPLC of Formula: 636-73-7, the publication is Chemical Physics Letters (2005), 402(4-6), 324-328, database is CAplus.

Anhydrous proton conducting material for polymer electrolyte membrane fuel cell (PEFC) was prepared by the mixing of zwitterionic-type mol. solid 3-pyridinesulfonic acid (PS) and organic acid methylenediphosphonic acid (MP). As a result, PS mol., which has a sulfonic acid and a pyridine group in its structure, showed the proton conductivity of 4 × 10^-5 S cm^-1 at 160°C under anhydrous condition. Surprisingly, by the mixing of MP to PS material, the PS-MP composite material exhibited a conductivity of 2 × 10^-3 S cm^-1. Also, the conductivity of PS-MP composite material did not decrease under the heating at 160° for 50 h.

Chemical Physics Letters published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C11H14O4, HPLC of Formula: 636-73-7.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem