Tag: M.W=300-350

Zhu, Xin Yi published the artcileConstruction of Supramolecular Fluorescent Probe by a Water-Soluble Pillar[5]arene and Its Recognition of Carbonate Ion, Category: catalysis-chemistry, the publication is Bulletin of the Chemical Society of Japan (2022), 95(1), 116-120, database is CAplus.

The interaction between pyridine pillar[5]arene (PyP5) and 2-naphthol with the former as the host mol. and the latter as the guest mol. is studied by fluorescence spectroscopy and NMR techniques, and the results show that PyP5 forms a 1:1 host-guest inclusion complex with 2-naphthol. Although free 2-naphthol has strong fluorescence, it is quenched in 2-naphthol@PyP5. Experiments were conducted with 2-naphthol@PyP5 as a fluorescent probe to detect different anions with results showing that only CO₃^2- causes a significant enhancement of the fluorescence of the fluorescent probe. Due to this high selectivity and high sensitivity, the fluorescent probe 2-naphthol@PyP5 may open up an effective way for the detection of CO₃^2-.

Bulletin of the Chemical Society of Japan published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C20H17ClN4O3, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Dan, Shigeki published the artcileCapability of Artemia to digest Chlorella vulgaris and Nannochloropsis oculata under stagnant culture conditions, Application In Synthesis of 6217-54-5, the publication is Aquaculture Research (2022), 53(12), 4316-4326, database is CAplus.

The microalgae genera Chlorella and Nannochloropsis are commonly used as foods for rotifer culture and its nutritional enrichment materials. However, Artemia nauplii and early metanauplii cannot easily digest these genera because of their thick cell walls, and the conditions under which Artemia can digest them remain unclear. We investigated the size at which Artemia is capable of digesting these microalgae and the effects of Chlorella supply on Artemia fatty acid composition Decreased microalgae cell densities in culture water were observed after Artemia reached 1.6 mm in total length for Chlorella and 1.1 mm for Nannochloropsis, but the rate of decrease was slow and excrement from Artemia was filled with intact microalgae cells, suggesting that Artemia can ingest microalgae but cannot digest them. The d. of residual microalgae decreased linearly after Artemia reached 3.2 mm for Chlorella and 2.0 mm for Nannochloropsis, and the excrement contained broken cells, indicating true digestive performance. The absorption of fatty acids of Chlorella by the Artemia was detected after Artemia reached 3.5 mm in total length. These results suggest that Artemia acquires the ability to consume microalgae in a stepwise manner depending on the growth and species of microalgae.

Aquaculture Research published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Application In Synthesis of 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Vo-Dinh, Tuan published the artcileSurface-enhanced Raman scattering for medical diagnostics and biological imaging, Application In Synthesis of 10510-54-0, the publication is Journal of Raman Spectroscopy (2005), 36(6/7), 640-647, database is CAplus.

The authors present recent development and applications of a surface-enhanced Raman scattering (SERS) technol. for use in medical diagnostics and biol. imaging. For medical diagnostics, they use Raman-active dye-labeled DNA gene probes and nanostructured metallic substrates as SERS-active platforms. The surface-enhanced Raman gene probes can be used to detect DNA biotargets (e.g. gene sequences, bacteria and viral DNA) via hybridization to DNA sequences complementary to these probes. The SERS gene probes eliminate the need for radioactive labels and have great potential to provide both sensitivity, selectivity and label multiplexing for DNA sequencing and clin. assays. The authors also describe a hyperspectral surface-enhanced Raman imaging (HSERI) system that combines imaging capabilities with SERS detection to identify cellular components with high spatial and temporal resolution The HSERI system’s application to biol. imaging is demonstrated using Raman dye-labeled silver nanoparticles in cellular systems.

Journal of Raman Spectroscopy published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C4Br2N2O4S, Application In Synthesis of 10510-54-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wabuyele, Musundi B. published the artcileHyperspectral surface-enhanced Raman imaging of labeled silver nanoparticles in single cells, COA of Formula: C18H15N3O3, the publication is Review of Scientific Instruments (2005), 76(6), 063710/1-063710/7, database is CAplus.

We describe the development of an acousto-optic tunable filter (AOTF)-based hyperspectral surface-enhanced Raman imaging (HSERI) system equipped with an intensified charged coupled device and an avalanche photodiode. The AOTF device is a miniature rapid-scanning solid-state device that has no moving parts and can be rapidly tuned (microseconds) either sequentially or randomly, over a wide spectral range between 600 and 900 nm [corresponding to a large relative wave number range (?0-4500 cm^-1)], with respect to a 632.8 nm excitation and can also acquire images at a fairly narrow band of ?7 cm^-1. In this article we describe a confocal surface-enhanced Raman imaging (SERI) system developed in our laboratory that combines hyperspectral imaging capabilities with surface-enhanced Raman scattering (SERS) to identify cellular components with high spatial and temporal resolution The HSERI system’s application to cellular imaging is demonstrated using SERS-labeled nanoparticles in cellular systems.

Review of Scientific Instruments published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C14H23N, COA of Formula: C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wabuyele, Musundi B. published the artcileSurface-enhanced Raman scattering molecular nanoprobes, Formula: C18H15N3O3, the publication is Proceedings of SPIE-The International Society for Optical Engineering (2005), 209-215, database is CAplus.

Nanoparticles are increasingly finding a wide application in the biol. studies due to their unique phys. and chem. properties. Colloidal nanoparticles are efficient substrate that exhibit surface-enhanced Raman scattering (SERS) phenomenon by enhancing the scattering cross-sections of conjugated Raman active mols. thus enabling highly sensitive biol. probes. However, biol. and medical applications would require nanoparticles to be conjugated to biomols. A universal approach for conjugation of mercarptoacetic acid-capped silver nanoparticles to biomols. is described. The surface functionalized silver colloids were labeled with a Raman active dye and used for cellular imaging. We also described the use of silver nanoparticle to develop a new class of SERS nanoprobes for mol. recognition and detection of specific nucleic acid sequences.

Proceedings of SPIE-The International Society for Optical Engineering published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C8H15NO, Formula: C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Niu, Junjian published the artcileElectrically switched ion exchange film with molecular coupling synergistically-driven ability for recovery of Ag⁺ ions from wastewater, Application In Synthesis of 119-80-2, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2020), 124498, database is CAplus.

An elec. switched ion exchange film with mol. coupling synergistically-driven ability for the selective recovery of Ag⁺ ions is developed by coupling a conducting polypyrrole (PPy) with a 2, 2′-dithiosalicylic acid (DTSA) at mol. scale. The rapid and selective uptake/release of Ag⁺ ions by this hybrid film was found to be realized by the electrochem. circulation of the PPy ? PPyⁿ⁺ as well as the disulfide ? dithiolate and the recognition ability of the carboxyl groups and disulfide bonds of DTSA. As a result, the recovery of Ag⁺ ions can be handily achieved by adjusting the operating potential applied on the hybrid film coated electrode. The electrochem. quartz crystal microbalance measurements combined with the cyclic voltammetric technique, XPS and d. functional theory computations were performed to identify the uptake/release mechanism of the hybrid film. Furthermore, the uptake capacity of the hybrid film maintained almost invariable after 10 consecutive uptake/release cycles, and the regeneration rate of Ag⁺ ions remained over 80% in each cycle. It is expected that such an electroactive hybrid film can be applied for the recovery of Ag⁺ ions from various industrial discharges.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Application In Synthesis of 119-80-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Liu, Yushan published the artcileFluorescent thermochromic wood-based composite phase change materials based on aggregation-induced emission carbon dots for visual solar-thermal energy conversion and storage, Computed Properties of 119-80-2, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2021), 130426, database is CAplus.

Efficient solar-thermal energy conversion and storage is significant to overcome current energy shortage problems. Monitoring solar-thermal energy storage process by an evident and convenient display is conducive to improving energy utilization. Herein, fluorescent thermochromic wood-based composite phase change materials (WPCMs) were constructed for visual solar-thermal energy conversion and storage. It was fabricated by encapsulating polyethylene glycol (PEG) and aggregation-induced emission carbon dots (AIE-CDs) showing blue dispersed emission and red aggregation-induced emission into delignified wood (DW). The DW well-preserved the distinctive anisotropic porous structure and prevented the leakage problem of PEG. The WPCMs possessed great solar-thermal conversion capacity benefitting from strong and broad solar light absorption behaviors of AIE-CDs. Addnl., WPCMs showed real-time and visual fluorescent thermochromic property, it exhibited red AIE, and the fluorescence (FL) decreased and shifted into the blue emission band under solar radiation. The solar-thermal energy conversion and storage led to solid-liquid transformation of WPCMs, which promoted AIE-CDs’ dispersion, thereby changing the FL. It also exhibited a high latent heat of fusion (160.8 J¡¤g^-1), favorable stability over 150 heating-cooling cycles, thermal stability below 210¡ãC and good shape stability. The WPCMs can be extended to applications in energy-saving buildings and optical lighting materials with visual thermal regulation capability.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Computed Properties of 119-80-2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kitani, Akira published the artcileElectrochemical reduction of carbon dioxide reduction in aqueous solution, Formula: C17H37NO3, the publication is Denki Kagaku oyobi Kogyo Butsuri Kagaku (1978), 46(10), 570-2, database is CAplus.

The current efficiency of carboxylic acids, especially that of nonvolatile ones, was examined on the electrolytic reduction of CO₂ on a Pb-Hg electrode at a controlled potential of -1.9 V vs. SCE in an aqueous solution containing Bu₄NHCO₃ as a supporting electrolyte. Although the formation of ?10 carboxylic acids with 2-5 C atoms was confirmed beside HCO₂H, the current efficiencies for them were low. The increase in a hydrophobic region on an electrode surface, either by the addition of a cationic surfactant to an electrolytic solution in a concentration above the critical micelle concentration or by the utilization of a Cu electrode with adsorbed octylmercaptan instead of a Pb-Hg electrode, resulted in the inhibition of the formation of carboxylic acids with 2-3 C atoms and in the acceleration of the formation of nonvolatile ones, although the current efficiency for the total non-volatile acids was somewhat lowered.

Denki Kagaku oyobi Kogyo Butsuri Kagaku published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Formula: C17H37NO3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hattori, Tomohiro published the artcileSynthesis of silacyclic dipeptides: Peptide elongation at both N- and C-termini of dipeptide, Name: Fmoc-Pro-OH, the publication is Journal of the American Chemical Society (2022), 144(4), 1758-1765, database is CAplus and MEDLINE.

A new type of peptide bond formation utilizing silacyclic amino acids or peptides is described. This work has the following advantages: (1) imidazolylsilane is a highly fascinating coupling reagent for dipeptide synthesis from N-,C-terminal unprotected amino acids with amino acid tert-Bu esters; (2) deprotection of the tert-Bu ester at the C-terminus and cyclization sequentially proceed depending on reaction conditions to afford novel silacyclic dipeptides; (3) the cyclized products show a remarkable capacity as substrates of peptide elongation because the silacyclic compounds can act as both nucleophiles and electrophiles, and this capacity lead to one-pot site-selective tetra- and oligopeptide syntheses. These innovative advantages will help to simplify classical peptide synthesis significantly.

Journal of the American Chemical Society published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, Name: Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Jin, Wen Bin published the artcileBioisosteric investigation of ebselen: Synthesis and in vitro characterization of 1,2-benzisothiazol-3(2H)-one derivatives as potent New Delhi metallo-¦Â-lactamase inhibitors, Name: 2,2′-Dithiodibenzoic acid, the publication is Bioorganic Chemistry (2020), 103873, database is CAplus and MEDLINE.

In the present study, by employing the concept of bioisosteric replacement of the selenium moiety of ebselen, a small compound library of 2-substituted 1,2-benzisothiazol-3(2H)-ones, compounds I [R = 4-lCC₆H₄, 4-HOCH₂C₆H₄, cyclohexyl, etc.] were designed, synthesized and evaluated their cytotoxicity and synergistic activity in combination with meropenem against the E. coli Tg1 (NDM-1) strain. The most promising compound I [R = 4-lCC₆H₄] demonstrated potent synergistic activity against a panel of clin. isolated NDM-1 pos. CRE strains with FICI as low as 0.09. Moreover, its IC₅₀ value and inhibition mechanism were also confirmed by using the enzyme inhibition assay and the ESI-MS anal. resp. Importantly, compound I [R = 4-lCC₆H₄] has acceptable toxicity and is not a PAINS. Because of its structural simplicity and potent synergistic activity in combination with meropenem, we propose that compound 3a may be a promising meropenem adjuvant and a new series of such compounds may worth further investigations.

Bioorganic Chemistry published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Name: 2,2′-Dithiodibenzoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia