Tag: M.W=200-250

Karaman, Yeliz published the artcileInvestigation of electrochemical behavior of Calmagite at a glassy carbon electrode, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Dyes and Pigments (2014), 39-44, database is CAplus.

The voltammetric behavior of 1-(1-hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid (Calmagite) was studied by square-wave voltammetry (SWV), differential pulse voltammetry (DPV), cyclic voltammetry (CV) and d.c. voltammetry (DCV) in different electrolyte media. The voltammograms recorded at a glassy C electrode (GCE) exhibit one cathodic peak, corresponding to the two-step four-electron reduction process of azo compound The observed shift of the compound reduction peaks to more neg. potentials with increasing pH indicates that H ions are involved in the electrode reaction. The effect of scan rate and pH on the reduction peaks was studied. From the voltammetric data, the electrochem. reaction mechanism of the azo compound was suggested.

Dyes and Pigments 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

Zheng, Yajuan published the artcileAn improvement of the method for measurements of silicon content in water for laboratory use, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Guangdong Huagong (2012), 39(1), 105, 86, database is CAplus.

Platinum crucible intended for determination silicon content in water suffers from several disadvantages that it is very costly, difficult to preserve and not widely accessible. In the paper, the method adopted Teflon pot to replace Platinum crucible in the process of evaporation and condensation can satisfy the requirements of accuracy and precision, meanwhile, the approach utilization Teflon pot is cost-effective and time-saving.

Guangdong Huagong 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 C7H16ClNO2, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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

Yang, Wenbo published the artcileDirect Observation of Long-Lived Upper Excited Triplet States and Intersystem Crossing in Anthracene-Containing Pt^II Complexes, SDS of cas: 18512-55-5, the publication is Journal of Physical Chemistry Letters (2019), 10(24), 7767-7773, database is CAplus and MEDLINE.

Exceptionally long-lived T₂ states (7 ns) were observed with the N^N Pt^II bisacetylide complex (Pt-1) and trans-bis(phosphine) Pt^II bisacetylide complexes (Pt-2, Pt-3) containing anthryl acetylide ligands. For Pt-1, fluorescence of the anthryl moiety (An) was quenched and phosphorescence was observed Under 350 nm excitation, the upper long-lived triplet state T₂ (³An) was populated via ultrafast intersystem crossing (ISC) of S₁ (¹An) → T₂ (³An) (within 0.2 ps). Interestingly, Pt-3, after population of the S₁ state, emits strong fluorescence (Φ_F = 89%); the poor ISC is due to the high-lying T₂ (³An, 3.36 eV) vs. S₁ (¹An, 2.55 eV) state and the large energy gap between S₁ (¹An, 2.55 eV) and T₁ (³An, 1.32 eV) states. The population of the upper excited state S₂ (¹LLCT, 3.49 eV) turns to an efficient S₂ → T₂ → T₁, and ISC yield increases by 55% compared with S₀ → S₁ excitation. These results present new in-depth insights into fundamental photochem. of upper excited states.

Journal of Physical Chemistry Letters 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 C42H63O3P, SDS of cas: 18512-55-5.

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

Gai, Hengjun published the artcileExtraction of 1-amino-2-Naphthol-4-Sulfonic acid from wastewater using trioctylamine (N, N-dioctyloctan-1-amine) in methyl isobutyl ketone, COA of Formula: C10H9NO4S, the publication is Journal of Cleaner Production (2018), 774-782, database is CAplus.

Wastewater containing 1-amino-2-naphthol-4-sulfonic acid (ANS) is mainly derived from the dye production process, causing serious environmental problems. In this work, extraction of ANS from wastewater was carried out using trioctylamine (TOA) under condition of Me iso-Bu ketone (MIBK) as a diluent. The effects of diluent type, concentration of TOA, temperature and pH on the distribution coefficient (D) were discussed in detail. The results showed that the value of D = 76 was obtained with TOA (1.41 mol kg^-1) + MIBK at 25°C and pH = 1.1. After that, the extraction mechanism was determined by analyzing the chem. bonds of the complex compound using UV-vis, FT-IR and ¹H NMR. The exptl. results showed that the extractant could be regenerated by back extraction Specially the distillation process was simulated using Aspen Plus and the results verified its feasibility in the process of extractant regeneration. The proposed extraction system is conductive to both environment and technol.

Journal of Cleaner Production 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, COA of Formula: C10H9NO4S.

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

Zhu, Jikai published the artcileSynthesis and self-assembly of oligomers containing cruciform 9,10-bis(arylethynyl)anthracene unit: formation of supramolecular nanostructures based on rod-length-dependent organization, HPLC of Formula: 18512-55-5, the publication is Tetrahedron (2014), 70(6), 1230-1235, database is CAplus.

Conjugated rod-coil mols., incorporating flexible and rigid blocks, have a strong affinity to self-organize into various supramol. nanostructures in the bulk state.In this study, we report synthesized oligomers containing cruciform 9,10-bis(arylethynyl)anthracene units and characterized their self-assembly behavior. The mol. structures were characterized with ¹H, ¹³C NMR, and matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectroscopy. An investigation of the supramol. nanostructures of these mols. using differential scanning calorimetry, thermal polarized optical microscopy, and small-angle X-ray scattering revealed that the rod length of coil-rod-coil mols. with identical rod to coil volume ratios dramatically influences self-assembly behavior in the bulk state.

Tetrahedron 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 C15H14O3, HPLC of Formula: 18512-55-5.

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

Jin, Guangri published the artcileSynthesis, self-assembly and spectroscopic analysis of 9,10-bis((4-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)phenyl)ethynyl)anthracene, Formula: C18H10, the publication is Yingyong Huaxue (2015), 32(2), 177-182, database is CAplus.

Compound I [R = O(CH₂CH₂O)₃OMe] was synthesized by Sonogashira coupling. Its structure was characterized by ¹H NMR and MALDI-TOF mass spectroscopy. The self-assembling behavior of compound I [R = O(CH₂CH₂O)₃OMe] was investigated by means of differential scanning calorimetry (DSC), thermal polarized optical microscopy (POM), and small-angle X-ray scattering (SAXS) at the bulk state. Compound I [R = O(CH₂CH₂O)₃OMe] self-assembled into smectic A phase (SmA) in the solid state. Spectroscopic anal. suggested that compound 1 inherited the characteristic of high fluorescence quantum yield (Φ_f) of disubstituted anthracenes. The title compound I [R = O(CH₂CH₂O)₃OMe] is a kind of photoluminescence materials with good performance.

Yingyong Huaxue 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

Liu, Yang published the artcileSynthesis and self-assembly of triblock oligomers containing anthracene unit, SDS of cas: 18512-55-5, the publication is Gaodeng Xuexiao Huaxue Xuebao (2014), 35(5), 989-994, database is CAplus.

Rod-coil mols., consisting of a flexible and a rigid block, have a strong tendency to self-organize into a various supramol. nanostructures in the bulk state. Two coil-rod-coil triblock cruciform compds incorporating anthracene unit were synthesized through Sonogashira coupling reaction. Mol. structures of these compounds were characterized by ¹H NMR and MALDI-TOF mass spectroscopy. The self-assembling behaviors of these mols. were investigated by means of differential scanning calorimetry (DSC), thermal polarized optical microscopy (POM), small-angle and wide-angle X-ray scattering (SAXS and WAXS) at the bulk state. In liquid crystalline mesophase, the compounds connecting with tetra(ethylene oxide) as flexible chains self-assembles into oblique columnar phase and nematic phase, while the compound containing alkyl flexible chain self-assembles into lamellar structure (L) in the solid state, and has not shown liquid crystalline phase.

Gaodeng Xuexiao Huaxue Xuebao 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, SDS of cas: 18512-55-5.

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

Zhang, Chun-Hui published the artcileAn easily and environmentally friendly accessible small-molecule acetylenic donor for organic solar cells, Product Details of C18H10, the publication is Dyes and Pigments (2019), 983-988, database is CAplus.

Photovoltaic aryl acetylenes may provide a green access to high performance electron donors for organic solar cells. Here we describe a solution-processable acetylenic mol. An(DTDPPA)₂, which consists of a central anthracen-9,10-diyl unit and two dithienyldiketopyrrolopyrrole end-groups via acetylenic linkages. It’s worth noting that the acetylenic linkages in An(DTDPPA)₂ enable facile and green accessibility through Sonogashira reactions with atypically high yield and atom efficiency. In solid film An(DTDPPA)₂ features an absorption peak at 630 nm with an emerging shoulder at 686 nm. The HOMO/LUMO level of An(DTDPPA)₂ is estimated as -5.18/-3.62 eV according to cyclic voltammetry and the optical absorption onset. Due to the highly coplanar configuration and close packing, the hole mobility of the thermally annealed film of An(DTDPPA)₂ was improved to as high as 9.30 × 10^-4 cm² V^-1 s^-1. In combination with PC₆₁BM, the bulk heterojunction solar cells provide a power conversion efficiency of 5.26% utilizing no processing additive or solvent vapor annealing. The results are carefully discussed in comparison to the related compounds without the acetylenic linkage and based on the DFT mol. modeling. The demonstrated dramatic effects of acetylenic linkages in this work may encourage and motivate more efforts to design easily accessible and eco-friendly organic semiconductors.

Dyes and Pigments 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 C19H14N2, Product Details of C18H10.

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

Zhao, Zujin published the artcileNovel, yellow-emitting anthracene/fluorene oligomers: synthesis and characterization, Quality Control of 18512-55-5, the publication is Tetrahedron (2007), 63(33), 7809-7815, database is CAplus.

Five highly soluble and strongly yellow fluorescent oligoalkyne dyes with well-controlled, alternating anthracene and fluorene units were successfully synthesized by a Pd/Cu-catalyzed Sonogashira coupling reaction and characterized. Their thermal stabilities, electrochem. behaviors, and photophys. properties were investigated. These oligomers might be used as models to study structure-property relationship for their corresponding polymers and applied in optoelectronics devices as materials themselves.

Tetrahedron 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 C21H37BO, Quality Control of 18512-55-5.

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

Wu, Fang-Ying published the artcileA dual colorimetric and fluorescent sensor for lead ion based on naphthalene hydrazone derivative, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (2013), 221-225, database is CAplus and MEDLINE.

A new compound, 2-boronobenzaldehyde-(2′-hydroxyl-4′-sulfonic acid) naphthalene hydrazone (1), was synthesized and its structure was characterized by ¹H NMR, mass and element analyses. The presence of Pb²⁺ led 1 to undergo colorimetric and fluorescent changes, which were detectable with the naked eye. Thus, a dual spectral response for Pb²⁺ detection was introduced. In KH₂PO₄-NaOH buffer aqueous solution (pH 6.0), 1 exhibited fluorescence enhancement at 568 nm and hyperchromicity at 595 nm upon the addition of Pb²⁺. The fluorescent intensity change was proportionate to the concentration of Pb²⁺ with a dynamic working range of 5.0 × 10^-7 mol L^-1 to 1.0 × 10^-4 mol L^-1 and a detection limit of 3.7 × 10^-8 mol L^-1. The fluorometric method was successfully applied for the detection of Pb²⁺ water of Qianhu Lake and soil in Nanchang university campus. The recoveries were 111-116% for water and 97.6% for soil, resp., determined via the standard addition method.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy 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 C10H10O2, Recommanded Product: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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