Tag: M.W=200-250

Shi, Bing Bing published the artcileHighly selective fluorescent sensing for CN^– in water: utilization of the supramolecular self-assembly, Application In Synthesis of 116-63-2, the publication is Chemical Communications (Cambridge, United Kingdom) (2013), 49(71), 7812-7814, database is CAplus and MEDLINE.

A simple 4-amino-3-hydroxynaphthalene-1-sulfonic acid is demonstrated to fluorescently sense CN^– in water based on the mechanism of supramol. self-assembly. This work provides a novel approach for the selective recognition of CN^–. The detection limit of the sensor towards CN^– is 3.2 × 10^-7 M, and other anions, including F^–, Cl^–, Br^–, I^–, AcO^–, H₂PO₄^–, HSO₄^–, and ClO₄^–, had nearly no influence on the probing behavior. Notably, the test strips based on S₄ were fabricated, which could act as convenient and efficient CN^– test kits.

Chemical Communications (Cambridge, United Kingdom) 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 C14H10O4S2, Application In Synthesis of 116-63-2.

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

Han, Pei published the artcileThienoisoindigo-based polymers bearing diethynylbenzene and diethynylanthracene units for thin film transistors and solar cells, Formula: C18H10, the publication is Journal of Nanoscience and Nanotechnology (2018), 18(8), 5534-5541, database is CAplus and MEDLINE.

Two thienoisoindigo-based donor-acceptor conjugated polymers were synthesized via Sonogashira coupling reaction with 1,4-diethynylbenzene (P(TII-BEN)) and 9,10-diethynylanthracene (P(TII-ANT)) as donor units, resp. The optical and electrochem. properties of the polymers were also investigated. The highest hole mobility were 4.38 × 10^-3 cm² V^-1 s^-1 for P(TII-BEN) and 9.40 × 10^-3 cm² V^-1 s^-1 for P(TII-ANT) in bottom-gated/top-contact field-effect transistors. The bulk heterojunction organic solar cells consisting of the polymers and PC71BM yielded power conversion efficiencies of 1.59% for P(TII-BEN) and 1.90% for P(TII-ANT). Moreover, the microstructures were investigated by X-ray diffraction and at. force microscopy.

Journal of Nanoscience and Nanotechnology 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, Formula: C18H10.

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

Yuan, Jin-hai published the artcileTreatment of 1,2,4-acid wastewater by ferric-carbon microelectrolysis combined with Fenton oxidation process, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Chongqing Daxue Xuebao, Ziran Kexueban (2011), 34(9), 121-127, database is CAplus.

Experiments on the treatment process of 1,2,4-acid wastewater combined ferric-carbon microelectrolysis with Fenton oxidation process are carried out. The 1,2,4-acid wastewater is produced in the production process of 6-nitry (6-nitro-1-diazo oxygen naphthalene-4-acid). The exptl. conditions of Ferric-Carbon microelectrolysis, including pH value, reaction time, reaction temperature, Fe/C ratio and dosage of active carbon are studied. Fenton oxidation conditions of pH value, dosage of H₂O₂ and the economy data of the process are analyzed. Through single-factor experiments, the conditions for treating acid wastewater are found out. PH value is 1, Fe and C mass ratio is 3:1, and iron-carbon microelectrolysis reaction time is 3 h. The iron-carbon micro-electrolysis water is filtered to adjust its pH value into 3, then 2.5% wastewater of H₂O₂ with mass fraction of 30% is added, a reaction is performed at room temperature for 1 h, the pH value is adjusted into 7∼8, and then the iron-carbon micro-electrolysis water is filtered. The removal efficiency of COD of raw water can be improved to more than 95%. The cost of wastewater treating is 5.4 yuan/m³.

Chongqing Daxue Xuebao, Ziran Kexueban 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 C6H8O4, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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

Liu, Guochao published the artcileAdsorptive separation of binary naphthalene compounds by D201 resin, Formula: C10H9NO4S, the publication is Huanjing Huaxue (2012), 31(3), 372-378, database is CAplus.

D201 strong-base anion exchange resins were used to selectively adsorb and sep. 1-amino-2-naphthol-4-sulfonic acid (1,2,4-acid) and 2-naphthol in binary aqueous solution The effect of pH, concentration, temperature, resin bed height, and flow rate was investigated. The results show that D201 resin had very high adsorption selectivity and adsorption capacity for 1,2,4-acid in pH 3-6. Temperature had very little influence on D201 resin adsorption of 1,2,4-acid and 2-naphthol. The adsorption isotherms of 1,2,4-acid and 2-naphthol on the resin obey Freundlich model. Dynamic adsorption of the mixed aqueous 1,2,4-acid and 2-naphthol solution by D201 resin shows that, to the leak point of 1,2,4-acid, the adsorption effluent contained essentially 2-naphthol only, and 1,2,4-acid was completely adsorbed by the resin. With the increase of the resin bed and the decreases of the initial concentration and flow rate, the leak point was prolonged and the separation coefficient of 1,2,4-acid for 2-naphthol was improved. 1,2,4-Acid adsorbed on the column was eluted quant. by 15% (weight) NH₄Cl and 20% (volume) ethanol solution

Huanjing Huaxue 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, Formula: C10H9NO4S.

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

Tabanligil Calam, Tugba published the artcileElectrochemical determination of 8-hydroxyquinoline in a cosmetic product on a glassy carbon electrode modified with 1-amino-2-naphthol-4-sulphonic acid, Computed Properties of 116-63-2, the publication is Instrumentation Science & Technology (2021), 49(1), 1-20, database is CAplus.

A new voltammetric method was developed for the simple, rapid and inexpensive determination of 8-hydroxyquinoline (8HQ) on a modified electrode obtained by the electrodeposition of 1-amino-2-naphthol-4-sulfonic acid (ANSA) on the surface of a glassy carbon (GC) electrode. The electrode interfacial properties were investigated by electrochem. impedance spectroscopy (EIS). The electrochem. response of the ANSA-GC electrode toward 8-hydroxyquinoline was investigated by the use of square wave voltammetry. The ANSA-GC modified electrode showed two linear plots with 8-hydroxyquinoline concentrations from 5 x 10^-7 to 1.4 x 10^-5 mol dm^-3 (R² of 0.9984) and from 1.4 x 10^-5 to 4.25 x 10^-4 mol dm^-3 with a correlation coefficient R² equal to 0.9967. The limit of detection was 1.6 x 10^-7 mol dm^-3. The ANSA-GC modified electrode also showed excellent stability and reproducibility for up to two weeks. The anal. application of the ANSA-GC modified electrode was investigated for the determination of 8-hydroxyquinoline in a blush cosmetic product. The results in good agreement to those obtained by spectrophotometry as a standard method.

Instrumentation Science & Technology 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 C24H20Ge, Computed Properties of 116-63-2.

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

Ried, Walter published the artcileEthynylation reactions. XV. Light reactions of 1,4-diethynyl aromatic compounds, Application In Synthesis of 18512-55-5, the publication is Journal fuer Praktische Chemie (Leipzig) (1961), 306-9, database is CAplus.

cf. CA 55, 13392d, 21068c. Light sensitivity of diethynyl aromatic compounds (I) (CA 53, 5210f) was used in preparation of offset printing plates. I, coated from solution onto Al plates, was exposed to light through a negative, unreacted I was removed with solvents, and exposed Al etched with 1% H₃PO₄. Light sensitivity of I increased in the order: 1,4-diethynyl benzene, 9,10-diethynyl anthracene, 1,4-diethynyl naphthalene, and 1,4-diethynyl-2,3-dichloronaphthalene. Light caused ethynyl groups to trimerize to polymeric benzene derivatives

Journal fuer Praktische Chemie (Leipzig) 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, Application In Synthesis of 18512-55-5.

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

Xiao, Min published the artcileSynthesis of 2-borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone and recognition of Pb²⁺, Formula: C10H9NO4S, the publication is Fenxi Kexue Xuebao (2015), 31(6), 792-796, database is CAplus.

2-Borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone derivative 2-BBHSNH (the host 1) was designed and synthesized. Due to its good water solubility, the recognition system didn’t need any organic medium. Research results showed that 2-borono-benzaldehyde-(2′-hydroxyl-4′-sulfonate) naphthalene hydrazone possessed highly selective binding and recognition to Pb²⁺in KH₂PO₄-NaOH buffer solution (pH=6.0). The host 1 and Pb²⁺could form a 1:1 complex with strong fluorescence. The maximum emission wavelength of complex 1-Pb²⁺ was 568 nm and the binding constant was 4.3×10⁴ L·mol^-1. The presence of the other metal ions led fluorescence spectra of host 1 little change, such as Cu²⁺, Mn²⁺, Mg²⁺, Fe²⁺, Ca²⁺, Co²⁺, Ni²⁺, Hg²⁺, Cd²⁺, Ag⁺ and so on. Fluorescence intensity and the concentration of Pb²⁺ presented good linear relationship from 5.0×10^-7-1.0×10^-4 mol·L^-1 with a correlation coefficient of 0.9983, and the detection limit of method was 9.7×10^-8 mol·L^-1. The method was used to detect Pb²⁺in water sample from environment with the recovery of 111%-116%.

Fenxi Kexue Xuebao 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 C4H12ClNO, Formula: C10H9NO4S.

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

Achilli, Simona published the artcileSteric hindrance in the on-surface synthesis of diethynyl-linked anthracene polymers, Category: naphthyridine, the publication is Physical Chemistry Chemical Physics (2022), 24(22), 13616-13624, database is CAplus and MEDLINE.

Hybrid sp-sp² structures can be efficiently obtained on metal substrates via on-surface synthesis. The choice of both the precursor and the substrate impacts on the effectiveness of the process and the stability of the formed structures. Here we demonstrate that using anthracene-based precursor mols. on Au(111) the formation of polymers hosting sp carbon chains is affected by the steric hindrance between aromatic groups. In particular, by scanning tunneling microscopy experiments and d. functional theory simulations we show that the de-metalation of organometallic structures induces a lateral separation of adjacent polymers that prevents the formation of ordered domains. This study contributes to the understanding of the mechanisms driving the on-surface synthesis processes, a fundamental step toward the realization of novel carbon-based nanostructures with perspective applications in nanocatalysis, photoconversion, and nano-electronics.

Physical Chemistry Chemical Physics 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, Category: naphthyridine.

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

Vintu, M. published the artcileIndolo[3,2-b]carbazole-based poly(arylene ethynylene)s through Sonogashira coupling for optoelectronic and sensing applications, Formula: C18H10, the publication is Journal of Applied Polymer Science (2019), 136(2), n/a, database is CAplus.

Two indolo[3,2-b]carbazole (ICZ)-based polymers were designed and synthesized using Sonogashira cross-coupling based on dibromoindolo[3,2-b]carbazoles and 2,7-diethynylfluorene or 9,10-diethynylanthracene. The 2, 8 positions of the ICZ moiety was used for the bridging of arylene ethynylene structure to form the polymer backbone. The characterization was done by FTIR, ¹H NMR, UV-visible and (UV-visible) fluorescence spectroscopic methods. The polymers, moderately soluble in aprotic and chlorinated solvents, possess thermal stability >300°. The band gap examinations, executed through cyclic voltammetry and complemented by UV-visible studies, indicated their semiconducting nature and the possibility for their use for the fabrication of polymer solar cells and for optical switching applications. The new diethynylindolocarbazole systems act as Broensted acid sensors as well as a Hg²⁺ receptors. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46940.

Journal of Applied Polymer Science 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 C8H13BN2O4, Formula: C18H10.

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

Dahal, Gopal P. published the artcileA Fragment Library Screening Approach to Identify Selective Inhibitors against an Essential Fungal Enzyme, Product Details of C10H9NO4S, the publication is SLAS Discovery (2018), 23(6), 520-531, database is CAplus and MEDLINE.

Pathogenic fungi represent a growing threat to human health, with an increase in the frequency of drug-resistant fungal infections. Identifying targets from among the selected metabolic pathways that are unique to microbial species presents an opportunity to develop new antifungal agents against new and untested targets to combat this growth threat. Aspartate semialdehyde dehydrogenase (ASADH) catalyzes a key step in a uniquely microbial amino acid biosynthetic pathway and is essential for microbial viability. This enzyme, purified from four pathogenic fungal organisms (Candida albicans, Aspergillus fumigatus, Cryptococcus neoformans, and Blastomyces dermatitidis), has been screened against fragment libraries to identify initial enzyme inhibitors. The binding of structural analogs of the most promising lead compounds was measured against these fungal ASADHs to establish important structure-activity relationships among these different inhibitor classes. The most potent of these inhibitors have been docked into structures of this fungal enzyme target to identify important structural elements that serve as critical binding determinants. Several inhibitors with low micromolar inhibition constants have been identified that showed selectivity against these related enzymes from different fungal species. Subsequent screening against a library of drugs and drug candidates identified some addnl. inhibitors containing a consistent set of functional groups required for fungal ASADH inhibition. Addnl. elaboration of these core structures will likely lead to more potent and selective inhibitors.

SLAS Discovery 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, Product Details of C10H9NO4S.

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