Tag: M.W=200-250

Morisaki, Yasuhiro published the artcileSynthesis and photoluminescence behaviors of anthracene-layered polymers, HPLC of Formula: 18512-55-5, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2014), 52(19), 2815-2821, database is CAplus.

Novel anthracene-layered polymers containing fluorescence quenchers such as ferrocene and nitrobenzene units at the polymer termini were designed and synthesized. Their optical properties were studied in detail. The photoluminescence spectra of the polymers were featureless without vibrational structures, indicating that the anthracenes are effectively interacting each other in a single polymer chain in the excited state. Fluorescence emission from the layered anthracene units was effectively quenched by the aromatic units at the polymer termini owing to energy and electron transfer through a single polymer chain. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014.

Journal of Polymer Science, Part A: Polymer 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, HPLC of Formula: 18512-55-5.

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

Scott, Lawrence T. published the artcileThermal migration of an ethynyl group from one benzene ring to another by reversible vinylidene C-H insertion, Recommanded Product: 9,10-Diethynylanthracene, the publication is Tetrahedron Letters (1997), 38(11), 1877-1880, database is CAplus.

Evidence is presented for the high temperature opening of a 5-membered ring by extrusion of a carbene (the reverse of a C-H bond insertion), which results in the net thermal migration of an ethynyl group from one benzene ring to another.

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 C14H15BF3NO2, Recommanded Product: 9,10-Diethynylanthracene.

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

Shweta published the artcileDesign-specific mechanistic regulation of the sensing phenomena of two Schiff bases towards Al³⁺, HPLC of Formula: 116-63-2, the publication is RSC Advances (2016), 6(60), 55430-55437, database is CAplus.

We report herein two optical probes (R1 and R2) for the fluorogenic detection of Al³⁺ at the level of 10^-8 M. R1 and R2 were synthesized by simple Schiff base condensation of 4-amino-3-hydroxy-1-naphthalene sulfonic acid with 5-bromosalicaldehyde and 2-hydroxy-1-naphthaldehyde, resp. The same were characterized by various spectroscopic techniques. R1 and R2 both underwent fluorescence emission upon their resp. interactions with Al³⁺ in an ethanol : water mixture (4 : 1, volume/volume). The binding modes of the receptors with Al³⁺ were studied through ¹H NMR spectroscopy, Job plots, and HR-MS, as well as through binding constant determination involving fluorescence titration data. The quenching of -C=N isomerization and of photoinduced electron transfer (PET) seem to be responsible for the fluorogenic switch-on situation of R1 and R2 with Al³⁺. At the same time, excited state intramol. proton transfer (ESIPT) also plays an important role in the ratiometric fluorescence response of R2, which is a consequence of a minor structural variation in R1 where the bromophenyl moiety is replaced with a naphthalene moiety. The mechanistic aspects of the sensing phenomenon are discussed in terms of ¹H NMR titration as well as theor. calculations at the d. functional level.

RSC Advances 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 C17H14O5, HPLC of Formula: 116-63-2.

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

Beitollahi, Hadi published the artcileApplication of a modified CuO nanoparticles carbon paste electrode for simultaneous determination of isoperenaline, acetaminophen and N-acetyl-L-cysteine, Computed Properties of 116-63-2, the publication is Electroanalysis (2016), 28(3), 645-653, database is CAplus.

A 1-[2-hydroxynaphthylazo]-6-nitro-2-naphthol-4-sulfonate/ CuO nanoparticles modified carbon paste electrode (HNNSCCPE) was constructed and the electro-oxidation of isoprenaline at the surface of the modified electrode was studied using cyclic voltammetry (CV), chronoamperometry (CHA), and square wave voltammetry (SWV). Under the optimized conditions, the square wave voltammetric peak current of isoprenaline increased linearly with isoprenaline concentrations in the range of 1.0×10^-7 to 7.0×10^-4 M and detection limit of 5.0×10^-8 M was obtained for isoprenaline. The prepared modified electrode exhibits a very good resolution between the voltammetric peaks of isoprenaline, acetaminophen and N-acetyl-L-cysteine which makes it suitable for the detection of isoprenaline in the presence of acetaminophen and N-acetyl-L-cysteine in real samples.

Electroanalysis 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

El-Sayed, Amira A. published the artcileDesign, synthesis, anticancer evaluation and molecular docking study of novel 2,4-dichlorophenoxymethyl-based derivatives linked to nitrogenous heterocyclic ring systems as potential CDK-2 inhibitors, COA of Formula: C10H9NO4S, the publication is Journal of Molecular Structure (2022), 131285, database is CAplus.

A novel series of 2,4-dichlorophenoxymethyl-based derivatives 4-18 bearing various nitrogenous heterocyclic systems have been designed and synthesized through mol. hybridization approach. The anti-proliferative activity of all newly synthesized derivatives was established against human HCT-116 and MCF-7 cancer cell lines. The structure-activity relationship (SAR) studies exhibited that the derivatives incorporated with pyrido[3,2-d]pyrimidine, naphtho[2,3-e][1,3]oxazine-5-sulfonic acid, benzo[d]thiazole and benzo[d]oxazole scaffolds revealed the highest cytotoxic activities comparing with doxorubicin as a reference drug. The promising derivatives 5, 9, 13 and 15 were subjected to enzymic inhibitory assessment against CDK-2/cyclin A2 using roscovitine as a standard Concerning their effects upon the apoptotic process, they upregulated Bax, p-53 and caspase-3 levels and downregulated Bcl-2, causing induction of apoptosis. Moreover, the in silico mol. docking was applied to investigate the possible binding modes and orientations within the active site of CDK-2.

Journal of Molecular Structure 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

Morisue, Mitsuhiko published the artcileFully Conjugated Porphyrin Glass: Collective Light-Harvesting Antenna for Near-Infrared Fluorescence beyond 1 μm, Product Details of C18H10, the publication is ACS Omega (2018), 3(4), 4466-4474, database is CAplus and MEDLINE.

Expanded π-systems with a narrow HOMO-LUMO band gap encounter deactivation of excitons due to the “energy gap law” and undesired aggregation. This dilemma generally thwarts the near-IR (NIR) luminescence of organic π-systems. A sophisticated cofacially stacked π-system is known to involve exponentially tailed disorder, which displays exceptionally red-shifted fluorescence even as only a marginal emission component. Enhancement of the tail-state fluorescence might be advantageous to achieve NIR photoluminescence with an expected collective light-harvesting antenna effect as follows: (i) efficient light-harvesting capacity due to intense electronic absorption, (ii) a long-distance exciton migration into the tail state based on a high spatial d. of the chromophore site, and (iii) substantial transmission of NIR emission to circumvent the inner filter effect. Suppression of aggregation-induced quenching of fluorescence could realize collective light-harvesting antenna for NIR-luminescence materials. This study discloses an enhanced tail-state NIR fluorescence of a self-standing porphyrin film at 1138 nm with a moderate quantum efficiency based on a fully π-conjugated porphyrin that adopts an amorphous form, called “porphyrin glass”.

ACS Omega 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, Product Details of C18H10.

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

Alvey, Paul M. published the artcileConjugated NDI-Donor Polymers: Exploration of Donor Size and Electrostatic Complementarity, Name: 9,10-Diethynylanthracene, the publication is Macromolecules (Washington, DC, United States) (2013), 46(3), 718-726, database is CAplus.

Conjugated donor-acceptor copolymers comprised of electron-deficient 1,4,5,8-naphthalenetetracarboxylic diimide (NDI) linked to a series of relatively electron-rich aromatics via ethynyl spacers were synthesized and characterized. While LUMO levels remained constant at -3.75 eV, HOMO levels were sensitive to the relatively electron-rich aromatic donors and systematically tuned from -5.68 to -5.17 eV. Regardless of the electron-rich comonomer, fluorescence and x-ray diffraction data were consistent with the polymer chains being assembled through the stacking of NDI moieties in an offset face-to-face fashion rather than alternating donor-acceptor stacks.

Macromolecules (Washington, DC, United States) 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, Name: 9,10-Diethynylanthracene.

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

Lee, Haejoo published the artcileDendritic nanospace constructed by only glycerol units enhanced uptake of a fluorescent molecule in aqueous solution, Quality Control of 116-63-2, the publication is Chemical Communications (Cambridge, United Kingdom) (2012), 48(4), 546-548, database is CAplus and MEDLINE.

A polyglycerol dendrimer (PGD) of generation 2, consisting only glycerol units, constructed nanospace capable of uptake of a fluorescent mol. with a 1 : 1 stoichiometry. On the other hand, a PGD of generation 1 trapped the mol. at the outer part.

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 C10H9NO4S, Quality Control of 116-63-2.

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

Slovesnova, Nataliya V. published the artcileSynthesis of new water-soluble polyarene-substituted naphtho[1,2-d]oxazole-based fluorophores as fluorescent dyes and biological photosensitizers, Product Details of C10H9NO4S, the publication is Dyes and Pigments (2022), 110410, database is CAplus.

Two new water-soluble PAH-substituted (PAH – polyaromatic hydrocarbon) naphtho[1,2-d] [1,3]oxazole dyes 1-2 were synthesized and investigated for intramol. charge transfer (ICT) behavior, aggregation, and ability to fluorescent staining and photosensitization on living cancer cells of HeLa and Vero cultures. To make clear this behavior a detailed anal. of the relationship between the structure and photophys. properties 1-2 were carried out based on exptl. and computation data. As a result of the staining experiment, there was a diffuse distribution in the cytoplasm of 2-(9-anthracenyl)-containing naphthoxazole 1 as a hydrophilic fluorophore. Whereas 2-(1-pyrenyl)-derivative 2 showed accumulation in the endoplasmic reticulum, as well as addnl. distribution in lipid bilayers. Photodynamic activity of type II was confirmed for the cationic exogenous photosensitizer 2: the IC₅₀ value in the case of HeLa cell culture was 0.50μM. The radical mechanism of photodynamic activity was determined by the EPR method.

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 C4H4OS, Product Details of C10H9NO4S.

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

Denbela, Getachew published the artcileComputational study on 4-amino-3- hydroxynaphthalene-1-sulfonic acid (AHNSA), Quality Control of 116-63-2, the publication is International Research Journal of Pure and Applied Chemistry (2017), 14(4), IRJPAC.36284/1-IRJPAC.36284/14, database is CAplus.

A computational study on 4-amino-3-hydroxynaphthalene-1-sulfonic acid (AHNSA) has been carried out to investigate formation of poly-(AHNSA), and to obtain binding structures and energies of AHNSA-Ephedrine and AHNSA-Caffeine complexes. For this purpose, the DFT/B3LYP/6-31G(D) and DFT/B3LYP/6-31+G(D) level of theories were utilized. These were investigated from anal. of their at. charge distributions, total spin d., frontier MOs, electrostatic potential maps and calculations of binding energies. Results from anal. suggest that homo-polymerization of AHNSA should involve the MOs arising between radical cations formed from the neutral monomer. The resulting data illustrated that the method was likely to be useful for homopolymerization of AHNSA. Calculated binding energies of AHNSA-Caffeine and AHNSA-Ephedrine complexes were -8.77 kcal mol^-1 and -8.36 kcal mol^-1, resp., which indicated that both complexes could be formed.

International Research Journal of Pure and Applied 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, Quality Control of 116-63-2.

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