Month: December 2022

Kim, Sunghwan published the artcileFabrication and Characterization of 3D Printed Polyvinyl Toluene Based Plastic Scintillator, COA of Formula: C17H28O8S4, the main research area is polyvinyl toluene diphenyloxazole plastic scintillator fabrication.

In this study, we report the fabrication and characterization of a 3D printed polyvinyl toluene based plastic scintillator by DLP (digital layer print) 3D printer. The homemade resin has been used for 3D printing. The organic solvents such as vinyl-toluene monomer, PPO (2,5-Diphenyloxazole), POPOP [1,4-bis(5-phenyloxazol-2-yl) benzene], pentaerythritol tetrakis (3-mercaptopropionate) and DHPA (dipentaerythritol hexa-acrylate) have been used as co-polymers. Irgacure 184 (BASF Co.) is used as photo-initiator. Using DLP 3D printer (http://attosystem.co.kr) and the prepared resin, a plastic scintillator is printed. The emission spectrum of the printed plastic scintillator is located between 400 and 600 nm, peaking at 424 nm. The relative light yield of the scintillator is about 80% of EJ-200, relatively and the decay time is about 3.9 ns.

Journal of the Korean Physical Society published new progress about Scintillators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, COA of Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Meng, Genyi published the artcileModular click chemistry libraries for functional screens using a diazotizing reagent, Application of 2,2-Dimethoxyethanamine, the main research area is alkyl aryl azide triazole chemoselective preparation; fluorosulfonyl azide generation chemoselective diazotization primary amine; combinatorial generation library alkyl aryl azide cycloaddition alkyne; functional screen click chem azide generated in situ.

Alkyl and aryl azides were prepared from the corresponding primary alkyl and aryl amines by reaction with fluorosulfonyl azide generated in situ from a fluorosulfonylimidazolium triflate and sodium azide, expanding access to azides and both to the 1,2,3-triazoles derived from them and to functional screens employing them. The method allowed the preparation of a library of >1000 azides from the corresponding amines; the azide library underwent copper-catalyzed azide-alkyne cycloaddition reactions to yield a library of >1000 1,2,3-triazoles.

Nature (London, United Kingdom) published new progress about Aromatic amines Role: CMB (Combinatorial Study), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (primary). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Application of 2,2-Dimethoxyethanamine.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Park, Hea Jung published the artcileNew blue phosphorescent heteroleptic Ir(III) complexes with imidazole- and N-methylimidazole carboxylates as ancillary ligands, Computed Properties of 22483-09-6, the main research area is spirocyclic phenylpyridinyl iridacycle imidazolecarboxylate preparation electrochem OLED phosphorescence; crystal structure spirocyclic phenylpyridinyl iridacycle imidazolecarboxylate; mol structure spirocyclic phenylpyridinyl iridacycle imidazolecarboxylate.

Imidazole- and N-methylimidazole carboxylate were introduced to serve as ancillary ligands in heteroleptic Ir(III) complexes containing 2-phenylpyridine-based main ligands, with consideration of the frontier orbital energy levels. Complexes Ir1-Ir4 were synthesized and found to have LUMO levels higher than that of the corresponding Ir(III) complex containing pyridyl carboxylate. All the synthesized Ir(III) complexes exhibited blue phosphorescence emission maxima at 465-467 nm at room temperature Phosphorescent quantum efficiencies were increased by a factor of 1.8-6.7 by blocking the intermol. H bonding between the imidazole carboxylate ligands of neighboring Ir(III) complexes, which was achieved by N-methylation of the imidazole carboxylate ancillary ligand. The organic light-emitting diodes fabricated using Ir3 and Ir4 as dopant materials in the emissive layers emit blue emission with peaks at 469 and 471 nm and maximum external quantum efficiencies of 20.0 and 22.4%, resp. Also, all the fabricated devices with Ir3 and Ir4 exhibited low efficiency roll-off, indicating excellent stability of the materials.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about Carboxylic esters Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), SPN (Synthetic Preparation), PROC (Process), PREP (Preparation) (spirocyclic iridacycle imidazolecarboxylates). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Computed Properties of 22483-09-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Paupiere, Marine J. published the artcileThe effect of isolation methods of tomato pollen on the results of metabolic profiling, HPLC of Formula: 97-67-6, the main research area is Solanum pollen grain metabolomics homogenization reproducibility lyophilization flavonoid phenylpropanoid; Anther; Metabolite; Metabolome; Metabolomics; Pollen; Tomato.

Untargeted metabolomics is a powerful tool to detect hundreds of metabolites within a given tissue and to compare the metabolite composition of samples in a comprehensive manner. However, with regard to pollen research such comprehensive metabolomics approaches are yet not well developed. To enable isolation of pollen that is tightly enclosed within the anthers of the flower, such as immature pollen, the current pollen isolation protocols require the use of a watery solution These protocols raise a number of concerns for their suitability in metabolomics analyses, in view of possible metabolic activities in the pollen and contamination with anther metabolites. We assessed the effect of different sample preparation procedures currently used for pollen isolation for their suitability to perform metabolomics of tomato pollen. Pollen were isolated using different methods and the metabolic profiles were analyzed by liquid chromatog.-mass spectrometry (LC-MS). Our results demonstrated that pollen isolation in a watery solution led to (i) rehydration of the pollen grains, inducing marked metabolic changes in flavonoids, phenylpropanoids and amino acids and thus resulting in a metabolite profile that did not reflect the one of mature dry pollen, (ii) hydrolysis of sucrose into glucose and fructose during subsequent metabolite extraction, unless the isolated and rehydrated pollen were lyophilized prior to extraction, and (iii) contamination with anther-specific metabolites, such as alkaloids, thus compromising the metabolic purity of the pollen fraction. We conclude that the current practices used to isolate pollen are suboptimal for metabolomics analyses and provide recommendations on how to improve the pollen isolation protocol, in order to obtain the most reliable metabolic profile from pollen tissue.

Metabolomics published new progress about Alkaloids Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, HPLC of Formula: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ohzono, Takuya published the artcileDynamic Manipulation of Friction in Smart Textile Composites of Liquid-Crystal Elastomers, Category: alcohols-buliding-blocks, the main research area is interfacial friction nematic liquid crystal elastomer polyester smart textile.

Smart surfaces that reversibly change the interfacial friction coefficients in response to external stimuli enable a wide range of applications, such as grips, seals, brake pads, packaging films, and fabrics. Here, a new concept of such a smart frictional system is reported: a composite film of a plain-weave polyester textile sheet and a thermoresponsive nematic liquid crystalline elastomer (LCE). The composite is deployed with retractable microundulations of the elastomer inside each weave mesh, enabling dramatic changes of the contact interface with the opposing surface on LCE actuation, which is induced, e.g., by a change in temperature (T). At room T, the protruding viscoelastic parts of LCE in the nematic phase make contact with the opposing flat surface, resulting in a very high friction. At an elevated T (≈50°C, isotropic phase), the undulations of LCE surface are retracted within the thickness of the textile, and the contacts are limited to small regions around overlapping textile fibers, lowering the friction dramatically. This effect is fully reversible on heating/cooling cycles. The surface undulations are spontaneous, i.e., fabricated without any lithog. or alignment techniques. The present composite opens a new way for the application of sheets/films with switchable friction enabled by stimuli-responsive LCEs.

Advanced Materials Interfaces published new progress about Breaking strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Chenzhe published the artcileAmplified photo-responses in sequentially polymerized azobenzene-containing polymer networks: the role of isomer interconnection, Quality Control of 7575-23-7, the main research area is azobenzene interconnected photoresponsive polymer network photoactuation thermal mech property.

Authors report a one-pot synthesis method based on two-step sequential thiol-ene reactions for the facile preparation of azobenzene-interconnected photoresponsive polymers (azo-ICPRPs). In the first step, block-length-controlled azobenzene prepolymers (azo-prepolymers) are prepared in situ in a molten reaction mixture by using the nucleophile-catalyzed chemoselective thiol-Michael reaction. In the second step, the formed azo-prepolymers are further crosslinked with UV-transparent monomers by a free radical-initiated thiol-ene “”click”” reaction, yielding a crosslinked polymer system with rubbery storage moduli (Er) ranging from 3.6 to 6.7 MPa and glass transition temperatures (Tg) ranging from 21 to 28°C. The interconnection of azobenzene moieties in azo-ICPRPs is found to greatly amplify the photo-actuation performance. Compared to single-step polymerized polymers with the same monomer composition, azo-ICPRPs with long-block-length showed up to 7 times higher photostrains, with 50 times faster kinetics. Consequently, the specific actuation work and power output during each stroke were also greatly amplified by the interconnection of azobenzene. The maximum measured specific stroke work and power output under 15 mW cm-2 UV activation were 121.3 kJ m-3 and 34 W kg-1, resp., which are comparable to those for skeletal muscles.

Polymer Chemistry published new progress about Actuators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gbenou, Joachin D. published the artcilePhytochemical composition of Cymbopogon citratus and Eucalyptus citriodora essential oils and their anti-inflammatory and analgesic properties on Wistar rats, Safety of 2-(2-Hydroxypropan-2-yl)-5-methylcyclohexanol, the main research area is Cymbopogon Eucalyptus essential oil antiinflammatory analgesic.

Cymbopogon citratus and Eucalyptus citriodora are widely used herbs/plants as a source of ethnomedicines in tropical regions of the world. In this work, the authors studied the anti-inflammatory and gastroprotective effects of C. citratus and E. citriodora essential oils on formol-induced edema, and acetic acid induced abdominal cramps in Wistar rats. To fully understand the chem. induced anti-inflammatory properties of these plants, the authors first analyzed the chem. composition of the essential oils. A total of 16 chem. constituents accounting for 93.69 % of the oil, were identified in C. citratus among which, Geranial (27.04 %), neral (19.93 %) and myrcene (27.04 %) were the major constituents. For E. citriodora, 19 compounds representing 97.2 % of the extracted oil were identified. The dominant compound of E. citriodora essential oil was citronellal (83.50 %). In vivo anal. and histol. assay showed that the 2 essential oils displayed significant dose dependent edema inhibition effect over time. They displayed strong analgesic and antipyretic properties similar to that induced by 50 mg/kg of acetylsalicylate of lysine. However, the E. citriodora essential oil was more effective than that of C. citratus. The authors identified significant numbers of aldehyde mols. in both essential oils mediating antioxidant activity that may contribute to the anti-inflammatory effects observed on the rats. Altogether, this work demonstrates the anti-inflammatory property of C. citratus and E. citriodora suggesting their potential role as adjuvant therapeutic alternatives in dealing with inflammatory-related diseases.

Molecular Biology Reports published new progress about Aldehydes Role: BSU (Biological Study, Unclassified), PAC (Pharmacological Activity), THU (Therapeutic Use), BIOL (Biological Study), USES (Uses). 42822-86-6 belongs to class alcohols-buliding-blocks, name is 2-(2-Hydroxypropan-2-yl)-5-methylcyclohexanol, and the molecular formula is C10H20O2, Safety of 2-(2-Hydroxypropan-2-yl)-5-methylcyclohexanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Nagalakshmi, Veerasamy published the artcileSynthesis and characterization of new ruthenium(III) complexes derived from fluoreneamine-based Schiff base ligands and their catalytic activity in transfer hydrogenation of ketones, Category: alcohols-buliding-blocks, the main research area is ruthenium fluoreneamine Schiff base complex preparation transfer hydrogenation catalyst.

An easy and convenient synthesis of a new series of octahedral ruthenium(III) complexes bearing Schiff base ligands of general formula [RuCl2(EPh3)2(L)] (E = P, As and L = O,N-donor Schiff bases) is reported. The composition of all complexes was unequivocally characterized by spectral (IR, UV-visible, EPR) and ESI-MS techniques. The substituted Schiff base ligands behave as bidentate O,N-donors and coordinate to ruthenium via the phenolic oxygen, the azomethine nitrogen. Complexes were proven to catalyze the transfer hydrogenation of linear, cyclic and aromatic ketones to their corresponding secondary alcs. in the presence of i-PrOH/KOH at 80° with conversion up to 99%. The effect of other variables on the transfer hydrogenation reaction such as solvent, base, and catalyst loading is also reported.

Journal of Coordination Chemistry published new progress about Ketones Role: RCT (Reactant), RACT (Reactant or Reagent). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Song, Young-Kyu published the artcileRepeatable Self-Healing of a Protective Coating Based on Vegetable-Oil-Loaded Microcapsules, SDS of cas: 111-87-5, the main research area is vegetable oil loaded microcapsule self healing protective coating; microcapsule; olive oil; protective coating; repeatable self-healing; soybean oil; viscoelasticity.

Generally, microcapsule-based self-healing materials have the limitation of single local self-healing. A few studies have reported repeatable self-healing in these microcapsular materials, but there is a challenge to develop multi-cycle self-healing materials that have the advantages of easier preparation and a more efficient operation. In this work, a mixture of two vegetable oils, soybean and olive oil, was used as a healing agent. The atm. oxygen-induced reaction behavior (in the presence of a catalyst) was investigated for various compositions of the vegetable oil mixtures; IR spectroscopy, recovery testing, and viscoelasticity measurement were performed to find an optimum composition of the healing agent. Microcapsules loaded with soybean oil and catalyst-containing olive oil were sep. prepared and used to prepare a dual-capsule self-healing coating. It was demonstrated through optical and SEM that, upon scribing the self-healing coating, the vegetable oils flowed out from microcapsules to self-heal the damaged area. When the healed area of the self-healing coating was re-scribed, self-healing was repeated, which was confirmed by SEM (SEM) and anticorrosion and electrochem. testing. Our new repeatable self-healing coating provides the merits of easy preparation, no need for external intervention such as light irradiation, and an environmentally-friendly nature.

Polymers (Basel, Switzerland) published new progress about Anticorrosive coating materials. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yu, Zhihui published the artcileComparative analysis of lipid profiles and flavor composition of marinated eggs from different species, Synthetic Route of 124-76-5, the main research area is chicken quail pigeon marinated egg flavor lipid.

This study compared lipid profiles and volatile composition in marinated eggs from different species (chicken, quail, and pigeon) using LC-ESI-MS/MS, and GC-MS, resp. The three marinated eggs showed significant differences in phosphatidylcholine, phosphatidylethanolamine (PE), and neutral lipid profiles of the three marinated eggs. Pigeon-eggs contained the highest content of PE but the lowest content of triglycerides. Seventy-six potential lipid metabolites such as Cer(d18:1/21:0), DG(15:0/18:2), and PE-O(16:1/18:2) were selected for the discrimination of all three groups. Pigeon-eggs contained the highest contents of C18:2 and C22:6, as well as n-3 and n-6 PUFA than quail-eggs and chicken-eggs. Major compounds including 2-Nonanone, 1-Octen-3-ol, and cyclic octaat. sulfur have greatly contributed to the distinction of eggs from different species. The highest levels of aldehydes, acids, and ketones were found in chicken-eggs. This study reported that lipidomic and volatile composition anal. are promising approaches for discriminating of marinated eggs from different species. Novelty impact statement : This is the first study that aiming at comparing the lipid profiles and volatile composition in marinated eggs from different species (chicken, quail, and pigeon) using LC-ESI-MS/MS and GC-MS. Pigeon-eggs contained the highest contents of glycerol phospholipid, n-3, and n-6 PUFA. The predominating volatile compositions of marinated eggs were alcs. aldehydes acids and ketones. Therefore, this study provides a better understanding of the quality of marinated eggs, and help customers to better choose higher nutritional values of marinated eggs.

Journal of Food Processing and Preservation published new progress about Alcohols Role: ANT (Analyte), BSU (Biological Study, Unclassified), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, Synthetic Route of 124-76-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts