Tag: M.W=200-250

Turcas, Crina Valentina published the artcileAzo dye complexes. Synthesis and tinctorial properties, COA of Formula: C10H9NO4S, the publication is Scientific Bulletin – University “Politehnica” of Bucharest, Series B: Chemistry and Materials Science (2012), 74(1), 109-118, database is CAplus.

Exptl. results concerning synthesis of copper, cobalt, and chromium complex combinations with azo dyes starting from 1-diazo-2-naphthol-4-sulfonic acid and 6-nitro-1-diazo-2-naphthol-4-sulfonic acid by coupling with β-naphthol or 4-(diethylamino)-2-naphthol are presented. These complex combinations were characterized by elemental chem. anal. and electronic and IR spectra. Their dyeing properties on wool and polyamide were determined

Scientific Bulletin – University “Politehnica” of Bucharest, Series B: Chemistry and Materials Science published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C11H12O4, COA of Formula: C10H9NO4S.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Teli, M. D. published the artcileAntibacterial textiles using antibacterial dyes, Synthetic Route of 116-63-2, the publication is Asian Dyer (2011), 8(4), 37-40, database is CAplus.

The application of zinc complex dyes on silk and nylon for obtaining a more permanent way of microbial protection to textiles was explored. In order to do so, the preparation and characterization of 2:1 zinc complexes were performed. The 2:1 zinc metal complex dyes were successfully synthesized. These premetallized zinc complex dyes were found to exhibit excellent antibacterial properties. As long as these dyes are on the fabric, its antibacterial property continues to last, offering a new route of obtaining durable antibacterial properties on silk and nylon fabrics.

Asian Dyer published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C16H21N3O3S, Synthetic Route of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Tathe, Abhinav B. published the artcileNovel Fluorescent Phenazines : Synthesis, Characterization, Photophysical Properties and DFT Calculations, Quality Control of 116-63-2, the publication is Journal of Fluorescence (2015), 25(5), 1403-1415, database is CAplus and MEDLINE.

The organic compounds with donor-π-bridge-acceptor type of architecture are of great interest for application as semiconductors. The synthesized compounds are obtained from 4-morpholino naphthalene-1,2-dione and 4-(4-(diethylamino) phenyl)naphthalene-1,2-dione and mono substituted ortho-phenylene diamines by condensation reaction. The donor groups are morpholinyl and N,N-diethylamino Ph moieties, whereas acceptors are substituted phenazines. The synthesized mols. were characterized by spectral anal.. The effect of the substitution has been studied on the basis of photophys. properties of the mols. The halochromism behavior of the mol. shows that at low to moderate acidity they respond differently with two types of donors. DFT computations were used in conjunction with NMR anal. to determine the ratio of the positional isomers.

Journal of Fluorescence published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C6H8O6, Quality Control of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

W-Radhi, Sami published the artcilePreparation and use of a new organic reagent of 4-(furan-2-yldiazenyl)-3-hydroxy naphthalene-1-sulfonic acid (FDHNSA) in an analytical study of some metal ions and drugs, such as salbutamol (SAL) and methyldopa (MDP), Category: naphthyridine, the publication is Research Journal of Pharmaceutical, Biological and Chemical Sciences (2022), 13(3), 170-180, database is CAplus.

This study includes the synthesis of organic reagent 4-(Furan-2-yldiazenyl)-3-hydroxy naphthalene-1-sulfonic acid (FDHNSA) by reacting a diazonium Salt (4-amino-3-hydroxy naphthalene-1-sulfonic aciel) with Furan in alk. ethanol solution The prepared reagent was identified by using (UV-Vis), (FT.IR), (H1NMR) techniques, it was λmax = 412 nm for the reagent (FD HNSA) in ethanol. The m.p. of reagent (FDANSA) is found to be (129-130)°C. This study tried to find a quick, easy and inexpensive spectral way to detection two kind of drugs, Methyldopa (MDP) and Salbutamol (SAL) through the reaction the drugs with anew regent 4-(furan-2-yldiazenyl)-3-hydroxynaphthalene-1-sulfonic acid (FDHNSA) in alk. medium. The results a highest absorption for (SAL) with FDHNSA at λmax = 485 nm, while the λmax = 348 nm for SAL in water, the highest absorption for the Free reagent (FDH NSA) λmax = 412 nm in ethanol. This study was conducted to find the optimized Conditions to estimate, the drug (SAL) with the new Reagent (FDHNSA), It was show the Optimized Concentration reagent was equal to (0.023M) and (2.5ml), The volume of drug (SAL) was equal to (1.5ml). The value of pH was equal (11). Added to that the effect of temperature and time were Conducted, a higher absorbance was obtained when temperature At (35°C), while at that best time it was obtained at (15min) for (SAL). The Calibration curve for the durg (SAL) was Constructed after establish the optime conditions. The Calibration Curve was constructed and subsequently the Beer′s Low was obeyed within the Concentration range of SAL (0.75 – 12 μg.ml-1). The Molar absorptivity (ε) Value was equal 1.5802 x 10+4L.mole-1.cm-1. The Sandell′s sensitivity value was equal 0.0365 μg.ml-1. The R.SD% value was equal. 1.230% with a correlation coefficient 0.9995. The stoichiometry of the reaction between the drug (SAL) and reagent (FDHNSA) was proposed with continuous variation and mode ratio methode was (1:1), (SAL:FDHNSA). Finally, interference was studied. The results reveal no effect on the determination of the drug. This methods was success fully applied for the determination of the drugs and in pharmaceutical compounds

Research Journal of Pharmaceutical, Biological and Chemical Sciences published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H12F6N4O6PdS2, Category: naphthyridine.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Parasuraman, Pavadai published the artcileSynthesis, characterization and antimicrobial evaluation of some substituted 4-aminocinnoline-3-carboxamide derivatives, Quality Control of 116-63-2, the publication is International Journal of Pharmacy and Life Sciences (2012), 3(2), 1430-1436, database is CAplus.

A series of 7-substituted-4-aminocinnoline-3-carboxamide were synthesized from 7-chloro-4-aminocinnoline-3-carboxamide treated with substituted aryl amines under phase transfer catalysis condition. The structure of the compounds were characterized by UV, IR, NMR and mass spectral data, and evaluated for their in vitro antimalarial, antibacterial, and antifungal activity. All analogs showed in vitro antimalarial activity against Plasmodium falciparum, and all the analogs showed antibacterial and antifungal activity in various microbes.

International Journal of Pharmacy and Life Sciences published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Quality Control of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Pavadai, Parasuraman published the artcileSynthesis, characterization and antimalarial evaluation of some substituted 4-aminocinnoline-3-carboxamide derivatives, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is International Journal of Pharmaceutical Chemistry (2011), 1(2), 39-44, database is CAplus.

A series of 7-substituted-4-aminocinnoline-3-carboxamide were synthesized from 7-chloro-4-aminocinnoline-3-carboxamide treated with substituted aryl amine under phase transfer catalysis condition. The structure of the compounds were characterized by UV, IR, NMR and mass spectral data, and evaluated for their in vitro antimalarial. All analogs showed in vitro antimalarial activity against Plasmodium falciparum.

International Journal of Pharmaceutical Chemistry published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Gole, Bappaditya published the artcileSupramolecular polymer for explosives sensing: role of H-bonding in enhancement of sensitivity in the solid state, HPLC of Formula: 18512-55-5, the publication is Chemical Communications (Cambridge, United Kingdom) (2011), 47(36), 10046-10048, database is CAplus and MEDLINE.

A π-electron rich supramol. polymer as an efficient fluorescent sensor for electron deficient nitroarom. explosives was synthesized, and the role of H-bonding in dramatic amplification of sensitivity/fluorescence quenching efficiency in the solid state is established.

Chemical Communications (Cambridge, United Kingdom) published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C18H10, HPLC of Formula: 18512-55-5.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Cao, Ye published the artcileThe oxidative degradation of Calmagite using added and in situ generated hydrogen peroxide catalysed by manganese(II) ions: Efficacy evaluation, kinetics study and degradation pathways, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Chemosphere (2022), 286(Part_2), 131792, database is CAplus and MEDLINE.

Manganese (II) ions (Mn(II)) catalyze the oxidative degradation of Calmagite (CAL, 2-hydroxy-1-(2-hydroxy-5methylphenylazo)-4-naphthalenesulfonic acid) at room temperature using added and in situ generated hydrogen peroxide (H₂O₂), using 1,2-dihydroxybenzene-3,5-disulfonate, disodium salt and monohydrate (Tiron) as the co-catalyst for the in situ generation of H₂O₂. The percentage of CAL degradation with the in situ generated H2O2 was 91.1% after 30 min which is lower than that in the added H₂O₂/Mn(II) system (96.0%). A one-eighth-lives method was applied to investigate the kinetic parameters in the added H₂O₂ system, with and without Mn(II), involving phosphate, carbonate, and two biol. buffers at different pHs. Percarbonate (HCO^–₄) was found to be the main reactive species for CAL degradation in the added H₂O₂ system buffered by carbonate in the absence of Mn(II). Manganese (IV) = O (Mn(IV) = O) and manganese(V) = O (Mn(V) = O) are the main reactive species in the added H2O2/Mn(II) system buffered by carbonate and non-carbonate buffers resp. pH 8.5 was the optimum pH for CAL degradation when buffered by carbonate, while pH 10.0 is the best pH for the systems not using carbonate buffer. Using a high performance liquid chromatog./electrospray ionisation mass spectrometer (HPLC/ESI-MS), the degradation intermediates of CAL were identified as 1-amino-2-naphthol-4-sulfonate ion, 1-amino-2-naphthol-4-sulfinic ion, 1-amino-2-naphthol, and 1-nitroso-2-naphthol.

Chemosphere published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Wu, Wei published the artcileSpectrophotometric determination of trace nitrite with a novel self-coupling diazotizing reagent: J-acid, Quality Control of 116-63-2, the publication is Khimiya i Tekhnologiya Vody (2015), 37(6), 545-554, database is CAplus.

A simple and sensitive method for the spectrophotometric determination of nitrite was described and optimum reaction conditions along with other important anal. parameters were established. In the presence of potassium bromide at 25°C, nitrite reacted with J-acid in hydrochloric acid producing diazonium salt and then coupled with excess J-acid in the sodium carbonate solution yielding red colored azo compounds At wavelength of 500 nm, Beer’s law was obeyed over the concentration range of 0,02-0,60 mg·L^-1. The molar absorptivity was 3,92·10⁴ L·mol^-1·cm^-1. This method was easily applied to the determination of trace nitrite in environmental water with recoveries of 98,7-101,2%.

Khimiya i Tekhnologiya Vody published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C17H18N3NaO3S, Quality Control of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

El-Dossoki, Farid I. published the artcileProtonation and solvation thermodynamics of some naphthol derivatives in KCl aqueous solution of different ionic strengths, Computed Properties of 116-63-2, the publication is Journal of Chemistry (2016), 7234320/1-7234320/8, database is CAplus.

The acid-base properties of naphthalen-1-ol (L1), naphthalene-1,5-diol (L2), and 4-amino-3-hydroxynaphthalene-1-sulfonic acid (L3) were characterized from pH-metric measurements in pure water and in different concentrations (0-4 mol kg^-1) of aqueous KCl solutions at the temperature range of T = (293.15 to 213.15)K at 5K intervals. The results reveal that naphthalen-1-ol and naphthalene-1,5-diol mols. have two ionizable protons (of the hydroxyl groups) while 4-amino-3-hydroxynaphthalene-1-sulfonic acid has three ionizable protons (hydrogen ion of the hydroxyl group, SO³H, and NH₃⁺). Modeling of the data was done by applying Debye-Hoeckel model.The protonation and the solvation processes of all studied ligands are spontaneous and endothermic processes. Also the solubilities of naphthalen-1-ol, naphthalene-1,5-diol, and 4-amino-3-hydroxynaphthalene-1-sulfonic acid were determined The data were analyzed using Setschenow equation and the values of Setschenow coefficients (K_m) were determined From the solubility data, the activity coefficients were obtained. The values of the total solubilities (ST) for naphthalen-1-ol and naphthalene-1,5-diol were found equal to the values of their neutral species (S⁰). On the other hand, the total solubility for 4-amino-3-hydroxynaphthalene-1-sulfonic acid is different from that of its neutral species.The results also indicate solubility decrease in pure water from L1-L2-L3.

Journal of Chemistry published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C10H9NO4S, Computed Properties of 116-63-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem