Tag: M.W=200-250

Jiang, Jian published the artcileNovel conjugated polymer containing anthracene backbone: the microstructure of polymer composed of 1,4-benzenedithiol with 9,10-diethynylanthracene and isomerization of the polymer and model compounds, COA of Formula: C18H10, the publication is Polymer Journal (Tokyo, Japan) (1990), 22(3), 274-82, database is CAplus.

In order to determine the microstructure of the polymer composed of 1,4-benzenedithiol with 9,10-diethynylanthracene, the model compounds cis– and trans-9,10-bis(phenylthiovinylene)anthracenes were prepared In comparison with the characteristic absorption peaks of vinylene in the model compounds, the microstructure of the polymer was evaluated. Regardless of the initiation mode, UV irradiation, AIBN and none, the cis contents of the polymers were 80-85%. The cis configuration of the polymer isomerized gradually to the trans one with increase of UV irradiation time. The characteristic features of the isomerization were also studied using model compounds The cis isomer of the model compound underwent irreversible isomerization to the trans one by UV irradiation In the presence of a radical source in the reaction system, both the cis and trans isomers can isomerize and reach an equilibrium state after reaction for a sufficient time. The isomerization mechanism was also discussed based on the potential energy diagram.

Polymer Journal (Tokyo, Japan) 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, COA of Formula: C18H10.

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

Belyaev, Andrey published the artcileSolution versus solid-state dual emission of the Au(I)-alkynyl diphosphine complexes via modification of polyaromatic spacers, Safety of 9,10-Diethynylanthracene, the publication is New Journal of Chemistry (2019), 43(35), 13741-13750, database is CAplus.

Single mol. luminophores capable of multiple emissions are essential for the development of new materials with unconventional photophys. behavior. In this work, a family of diphosphine ligands PPh₂-PAH-PPh₂ with variable polyaromatic hydrocarbon (PAH) spacers (PAH = 9,10-anthracene L1, 1,4-naphthalene L2, 2,6-naphthalene L3, and their diethynyl congeners L4–L6) were employed to prepare gold(I) complexes (RC₂Au)PPh₂-PAH-PPh₂(AuC₂R) (1–22), containing a selection of alkynyl groups. Investigation of their optical properties indicates that compounds with anthracene-based diphosphines (1–4 and 13–16) display only ¹IL (蟺蟺*) fluorescence with 桅_em up to 93%. The naphthalene and diethynyl-naphthalene diphosphine complexes (5–12 and 17–22), however, demonstrate panchromatic emission in the solid state and in solution featuring well-separated low and high energy signals, which originate from ¹IL (蟺蟺*) and ³IL (蟺蟺*) transitions along with certain contribution from metal to ligand and ligand to ligand charge transfers.

New Journal of Chemistry 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, Safety of 9,10-Diethynylanthracene.

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

Li, Yongjun published the artcileIntramolecular triplet energy transfer in anthracene-based platinum acetylide oligomers, Category: naphthyridine, the publication is Journal of Physical Chemistry B (2013), 117(30), 9025-9033, database is CAplus and MEDLINE.

Platinum acetylide oligomers that contain an anthracene moiety have been synthesized and subjected to photophys. characterization. Spectroscopic measurement and DFT calculations reveal that both the singlet and triplet energy levels of the anthracene segment are lower than those of the platinum acetylide segment. Thus, the platinum acetylide segment acts as a sensitizer to populate the triplet state of the anthracene segment via intramol. triplet-triplet energy transfer. The objective of this work is to understand the mechanisms of energy-transfer dynamics in these systems. Fluorescence quenching and the dominant triplet absorption that arises from the anthracene segment in the transient absorption spectrum of Pt4An give clear evidence that energy transfer adopts an indirect mechanism, which begins with singlet-triplet energy transfer from the anthracene segment to the platinum acetylide segment followed by triplet-triplet energy transfer to the anthracene segment.

Journal of Physical Chemistry B 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

Mathew, Manna Rachel published the artcilePoly(amino hydroxy naphthalene sulphonic acid) modified glassy carbon electrode; an effective sensing platform for the simultaneous determination of xanthine and hypoxanthine, Application of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Journal of the Electrochemical Society (2020), 167(4), 047519, database is CAplus.

A rapid, simple and reliable electrochem. sensor for the simultaneous determination of xanthine (XA) and hypoxanthine (HX) based on poly(4-amino-3-hydroxy naphthalene-1-sulfonic acid) [p(AHNSA)] modified glassy carbon electrode (GCE) is reported here. The proposed sensor permit well resolved and well separated peaks for XA and HX in 0.1 M NaOH at comparably lowest potential by square wave voltammetric (SWV) technique. The exptl. parameters required for the electroxidn. of both XA and HX are optimized. For simultaneous determination, the oxidation peak current showed a linear variation in the concentration range 4.0 x 10-4-3.0 x 10-6 M and 2.0 x 10-4-6.0 x 10-6 M with detection limits 7.1 x 10-7 M and 1.5 x 10-6 M for XA for HX, resp. The mechanistic aspects were studied by linear sweep voltammetry (LSV) and the electrode processes were found to be diffusion controlled. The developed sensor was found to have promising application in some real samples like tea and coffee and in physiol. samples with good selectivity and sensitivity.

Journal of the Electrochemical Society 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

Thomas, Ambily published the artcileCommunication-Electrooxidation of Dopamine at CoNP-pAHNSA Modified Electrode: A Sensitive Approach to Its Determination, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Journal of the Electrochemical Society (2018), 165(10), B466-B468, database is CAplus.

A voltammetric sensor for the simple and rapid determination of dopamine (DA) has been developed using a glassy carbon electrode modified with cobalt nano/poly (4-amino-3-hyroxy-1-naphthalenesulfonic acid) composite. On square wave voltammetric mode, the modified electrode was found to efficiently catalyze the electrochem. oxidation of DA in 0.1 M PBS (pH 7). Response of DA increased linearly with its concentration in the range 5 脳 10^-5 M to 5 脳 10^-7 M with a limit of detection (LOD) 1.75 脳 10^-8 M. Reliability of the developed sensor in real sample anal. was ascertained successfully by determining DA in artificial blood serum, urine and cerebrospinal fluid (CSF).

Journal of the Electrochemical Society 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 C2H4ClNO, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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

Kumar, Rajesh published the artcileSynthesis, anti-microbial evaluation, and QSAR studies of 4-amino-3-hydroxy-naphthalene-1-sulfonic acid derivatives, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Medicinal Chemistry Research (2012), 21(12), 4301-4310, database is CAplus.

A series of 4-amino-3-hydroxy-naphthalene-1-sulfonic acid derivatives was synthesized and tested in vitro for its anti-microbial potential. The results of anti-microbial studies indicated that derivatives I [R¹ = H, R² = R³ = R⁴ = OMe; R¹ = R³ = Cl, R² = R⁴ =H] were found to be most effective ones. The mt-QSAR model for anti-microbial activity revealed the importance of topol. parameter, valence zero-order mol. connectivity index (⁰蠂^v) in describing the anti-microbial activity of synthesized 4-amino-3-hydroxy-naphthalene-1-sulfonic acid derivatives

Medicinal Chemistry Research 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, Name: 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.

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

Dibble, David J. published the artcileAza-Diels-Alder Approach to Diquinolineanthracene and Polydiquinolineanthracene Derivatives, Application of 9,10-Diethynylanthracene, the publication is Organic Letters (2018), 20(3), 502-505, database is CAplus and MEDLINE.

This study describes the synthesis of modular diquinolineanthracene and polydiquinolineanthracene derivatives The reported facile and scalable aza-Diels-Alder-based approach requires mild conditions, proceeds in two steps, uses com. available starting materials, and accommodates varying functionalities. Given the known utility of the acene and quinoline motifs, the synthesized mols. and polymers hold promise for organic electronics applications.

Organic 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 C18H10, Application of 9,10-Diethynylanthracene.

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

Kempe, Hideto published the artcileEnormously extended 蟺-electronic conjugation system of dimeric octaethylporphyrin transmitted with anthracene, Application In Synthesis of 18512-55-5, the publication is Tetrahedron Letters (2014), 55(37), 5164-5169, database is CAplus.

Based on the fact that anthracene (Anth) possesses much higher similarity in electron-releasing ability to porphyrin nucleus than the other polyacenes, the dimeric octaethylporphyrin (OEP) derivatives 4 and 5 (OEP-Anth-OEP) were synthesized and their structure-property relations were examined, as compared with related OEP dimers 1-3. Among them, the derivative 4 showed enormously high electronic communication between two terminal OEP rings, potentially providing a suitable unit of the electronic structure for mol. design of the OEP devices operating with less energy and with higher sensitivity to outside stimuli.

Tetrahedron 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 C18H10, Application In Synthesis of 18512-55-5.

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

Thirugnanaselvi, S. published the artcileEffect of Schiff base as corrosion inhibitor on AZ31 magnesium alloy in hydrochloric acid solution, Application In Synthesis of 116-63-2, the publication is Transactions of Nonferrous Metals Society of China (2014), 24(6), 1969-1977, database is CAplus.

Schiff base derived from the condensation reaction of analar grade 1-amino-2-naphthol 4-sulfonic acid with cinnamaldehyde was prepared under microwave condition. The Schiff base was analyzed by IR spectroscopy. This Schiff base as a corrosion inhibitor of AZ31 magnesium alloy in 0.05 mol/L HCl solution was studied. The inhibition effect of the Schiff base compound (4Z)-4-(3-Ph allylidene amino)-3-hydroxy naphthalene-1-sulfonic acid (AC) on AZ31 magnesium alloy corrosion was studied using mass loss, potentiodynamic polarization technique, electrochem. impedance spectroscopy methods. The potentiodynamic polarization curve shows that Schiff base AC inhibits both anodic and cathodic reactions at all concentration, which indicates it is a mixed type inhibitor. EIS results indicate that as the additive concentration is increased, the polarization resistance increases whereas double-layer capacitance decreases. The adsorption of AC on the AZ31 magnesium alloy surface in 0.05 mol/L HCl obeys the Langmuir adsorption isotherm.

Transactions of Nonferrous Metals Society of China 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 C19H34ClN, Application In Synthesis of 116-63-2.

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

Sagara, Yoshimitsu published the artcileBrightly Tricolored Mechanochromic Luminescence from a Single-Luminophore Liquid Crystal: Reversible Writing and Erasing of Images, Application In Synthesis of 18512-55-5, the publication is Angewandte Chemie, International Edition (2011), 50(39), 9128-9132, S9128/1-S9128/20, database is CAplus and MEDLINE.

The authors report a new type of stimuli-responsive luminescent liquid crystal that exhibits three luminescent colors, which can be switched by mech. and thermal stimuli. The liquid crystal is composed of equimolar amounts of the dumbbell-shaped compound I and compound II. The three luminescent colors observed are reddish-orange, yellow, and green, which are easily distinguished by the naked eye. Moreover, the liquid crystal mixture of I and II contains only one type of luminophor, 9,10-bis(phenylethynyl)anthracene and no additives are required to induce the luminescent color changes. The present results reveal that materials containing only a single luminophor component can switch between three different luminescent colors in the condensed state depending upon the molecularly assembled structures. Moreover, these luminescent images are capable of being written and erased. If a single luminophor component is sufficient to achieve a multiluminescent color device, it can lead to cost reduction in the production of multicolor luminescent displays and sophisticated stimuli-responsive luminescent materials. The authors results also imply that the switching of assembled structures of luminescent groups is one of the most promising ways to obtain external-stimuli-responsive luminescent materials, which adds to the conventional approaches of inducing change to the mol. structures itself by light, pH, redox, and mech. stimuli.

Angewandte Chemie, International Edition 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