Tag: 200-300

Reduced efficiency roll-off in light-emitting diodes enabled by quantum dot-conducting polymer nanohybrids was written by Bae, Wan Ki;Lim, Jaehoon;Zorn, Matthias;Kwak, Jeonghun;Park, Young-Shin;Lee, Donggu;Lee, Seonghoon;Char, Kookheon;Zentel, Rudolf;Lee, Changhee. And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2014.Product Details of 27249-90-7 This article mentions the following:

The authors demonstrate QLEDs implementing wider active layers (50 nm) based on QD-conducting polymer nanohybrids, which exhibit a stable operational device performance across a wide range of current densities and brightness. A comparative study reveals that the significant suppression of efficiency roll-off in the high c.d. regime is primarily attributed to a sufficient charge carrier distribution over the wider active layer and improved charge carrier balance within QDs enabled by the hybridization of QDs with conducting polymers. Use of this finding in future studies should greatly facilitate the development of high performance, stable QLEDs at high c.d. or luminance regime toward displays or solid-state lighting applications. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Product Details of 27249-90-7).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Product Details of 27249-90-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

In situ generation of nitrile oxides from copper carbene and tert-butyl nitrite: synthesis of fully substituted isoxazoles was written by Chen, Rongxiang;Ogunlana, Abosede Adejoke;Fang, Shangwen;Long, Wenhao;Sun, Hongmei;Bao, Xiaoguang;Wan, Xiaobing. And the article was included in Organic & Biomolecular Chemistry in 2018.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate This article mentions the following:

A [3 + 2] cycloaddition reaction of β-keto esters with nitrile oxides, which were generated in situ from copper carbene and tert-Bu nitrite, is reported. This three-component reaction provides methodol. for the direct synthesis of fully substituted isoxazole derivatives, featuring mild reaction conditions, readily accessible starting materials and simple operation. The exptl. studies and DFT calculations suggest that the reaction starts with the generation of the key intermediate nitrile oxides, followed by a [3 + 2] cycloaddition reaction of β-keto esters to give the final isoxazole products. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Name: Ethyl 3-oxo-3-(m-tolyl)propanoate).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Name: Ethyl 3-oxo-3-(m-tolyl)propanoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Discovery of contaminants with antagonistic activity against retinoic acid receptor in house dust was written by Jia, Yingting;Zhang, Hong;Hu, Wenxin;Wang, Lei;Kang, Qiyue;Liu, Jiaying;Nakanishi, Tsuyoshi;Hiromori, Youhei;Kimura, Tomoki;Tao, Shu;Hu, Jianying. And the article was included in Journal of Hazardous Materials in 2022.Application In Synthesis of Dimethyl decanedioate This article mentions the following:

Retinoic acid receptors (RARs) control reproduction and development in vertebrates, but little attention has been paid to anthropogenic chems. exhibiting RAR agoniztic/antagonistic activity. Here we applied a His-RARα pull-down assay combined with high-resolution mass spectrometry to identify chems. with RARα activity in house dust. After screening, a total of 540 peaks were retained as potential RARα ligands. The mass spectra of 14 chems. matched with those in the database, of which tri-Ph phosphate, galaxolidone, di(2-ethylhexyl) phthalate (DEHP), tris(2-ethylhexyl) phosphate (TEHP), and tris(2-butoxyethyl) phosphate were confirmed by their standards While one chem. in the sample matched with monophenyl phosphate in the MS/MS database, its retention time was much higher than that of monophenyl phosphate standard, suggesting that it may be an in-source fragment. Its parent ion was finally identified to be m/z 399.2663 using a similarity anal. among chromatog. peaks of hundreds of ions at the same retention time in MS1 spectrum, and bis(2-ethylhexyl) Ph phosphate (BEHPP) was identified. BEHPP, DEHP, and TEHP were for the first time identified to be RARα antagonists with IC50 values of 6556, 6600, and 2538 nM, resp. This study improved structural annotation and filled the knowledge gap regarding widespread environmental contaminants with RAR antagonistic activity. In the experiment, the researchers used many compounds, for example, Dimethyl decanedioate (cas: 106-79-6Application In Synthesis of Dimethyl decanedioate).

Dimethyl decanedioate (cas: 106-79-6) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Application In Synthesis of Dimethyl decanedioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Tryptophan-Containing Block Copolymers Prepared by RAFT Polymerization: Synthesis, Self-Assembly, and Chiroptical and Sensing Properties was written by Mori, Hideharu;Takahashi, Eri;Ishizuki, Ai;Nakabayashi, Kazuhiro. And the article was included in Macromolecules (Washington, DC, United States) in 2013.Name: Benzyl benzodithioate This article mentions the following:

Novel tryptophan-based block copolymers with unique self-assembled structures, chiroptical properties, and sensing functionality were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization of a tryptophan-containing acrylamide, N-acryloyl-L-tryptophan (A-Trp-OH). Polymerization of A-Trp-OH using a suitable chain transfer agent (CTA) proceeded in a controlled fashion, as confirmed by the relatively narrow polydispersity of the products and a mol. weight that could be controlled by the monomer-to-CTA molar ratio. Hydrophilic polymers obtained by RAFT polymerization of N,N-dimethylacrylamide, poly(ethylene glycol) Me ester methacrylate, and N-acryloyl-4-trans-hydroxy-L-proline were used as macro-CTAs. Chain extension of these hydrophilic macro-CTAs with A-Trp-OH was well controlled under the appropriate conditions to afford block copolymers with “as-designed” chain structures and relatively low polydispersities. The formation of micelles consisting of a hydrophobic core of poly(A-Trp-OH) and a hydrophilic shell was observed in aqueous solution and affected the optoelectronic properties of the polymer. We further investigated the chiroptical and sensing properties of the block copolymers by dynamic light scattering, UV-vis and fluorescence spectroscopy, and CD measurements. We present a new example of amino acid-based polymeric fluoride ion (F^–) probes in which micelles self-assembled from these block copolymers serve as enhanced ratiometric fluorescent and chiroptical F^– sensors, possessing characteristic detection capabilities in aqueous and organic media. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Name: Benzyl benzodithioate).

Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Name: Benzyl benzodithioate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Poly(3,4-propylenedioxypyrrole) Nanofibers with Branched Alkyl Chains by Electropolymerization to Obtain Sticky Surfaces with High Contact Angles was written by Diouf, Djibril;Diouf, Alioune;Mortier, Claudio;Darmanin, Thierry;Dieng, Samba Yande;Guittard, Frederic. And the article was included in ChemistrySelect in 2017.Name: Diethyl isobutylmalonate This article mentions the following:

Inspired by natural species such as rose petals or Echeveria pulvinata leaves with both high water contact angle θ_w and high water adhesion (also called parahydrophobic), we have prepared poly(3,4-propylenedioxypyrrole) with branched alkyl chains on the 3-position by electropolymerization The grafting at the 3-position keeps the NH group free, which is an important condition to obtain nanofibers. Different lengths of branched alkyl chains are studied. Here, using extremely long branched alkyl chains (ProDOP-br-C₁₀), it is possible to obtain extremely long and well defined nanofibers leading to porous surfaces (fiber mats) favoring the trapping of air between the surface and water droplets. Using a deposition charge of 200 mC cm^-2, extremely high θ_w up to ~140° while water droplets placed on this surface remained stuck even for a sliding angle of 90°, revealing extremely strong adhesion. These materials could be used in the future in water harvesting systems. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Name: Diethyl isobutylmalonate).

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Name: Diethyl isobutylmalonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis of 2-methoxydibenzo[b,f](1,4)-thiazepin-11(10H)-one 5,5-dioxide was written by Bennett, O. Francis;Johnson, James;Tramondozzi, John. And the article was included in Organic Preparations and Procedures International in 1974.Related Products of 2327-45-9 This article mentions the following:

The title compound (I, n = 2) was prepared from the nitrobenzoate II (R = Me, R1 = NO2) in 8 steps. Thus II (R = Me, R1 = NO2) was reduced to II (R = Me, R1 = NH2), hydrolyzed to II (R = H, R1 = NH2), deaminated and treated with Na2S to give II (R = H, R1 = SH), which was esterified and treated with 2-O2NC6H4I and hydrolyzed to give II (R = H, R1 = 2.O2NC6H4S). FeSO4-NH4OH reduction gave II (R = H, R1 = 2-H2NC6H4S), which was cyclized to I (n = 0) and oxidized to I (n = 2). In the experiment, the researchers used many compounds, for example, Methyl 5-methoxy-2-nitrobenzoate (cas: 2327-45-9Related Products of 2327-45-9).

Methyl 5-methoxy-2-nitrobenzoate (cas: 2327-45-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Related Products of 2327-45-9

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Catalytic Asymmetric Synthesis of Quaternary Barbituric Acids was written by del Pozo, Sandra;Vera, Silvia;Oiarbide, Mikel;Palomo, Claudio. And the article was included in Journal of the American Chemical Society in 2017.Recommanded Product: Diethyl isobutylmalonate This article mentions the following:

The catalytic asym. α-functionalization of prochiral barbituric acids, a subtype of pseudosym. 1,3-diamides, to yield the corresponding 5,5-disubstituted (quaternary) derivatives remains essentially unsolved. In this study 2-alkylthio-4,6-dioxopirimidines are designed as key 1,3-diamide surrogates that perform exceedingly in amine-squaramide catalyzed C-C bond forming reactions with vinyl ketones or Morita-Baylis-Hillmann-type allyl bromides as electrophiles. Mild acid hydrolysis of adducts affords barbituric acid derivatives with an in ring quaternary carbon in unprecedented enantioselectivity, offering valuable materials for biol. evaluations. In the experiment, the researchers used many compounds, for example, Diethyl isobutylmalonate (cas: 10203-58-4Recommanded Product: Diethyl isobutylmalonate).

Diethyl isobutylmalonate (cas: 10203-58-4) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Recommanded Product: Diethyl isobutylmalonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Transesterification of malonic esters was written by Bondar, L. S.;Rodionov, P. P.;Okunev, R. A.. And the article was included in Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya in 1968.Recommanded Product: malonic acid dibutyl ester This article mentions the following:

Transesterification of malonic esters with various types of alcs. in the presence of alk. and acidic catalysts has been studied. Transesterification of esters catalyzed by alkali proceeds according to an SN2 mechanism and, when catalyzed by acids, proceeds according to a polycentric mechanism. In the former case transesterification of malonic ester (I) is facilitated by enolization of I and in the later case, by the formation of a cyclic intermediate. The corresponding alc. and the catalysts are heated to solution and then a lower ester of malonic acid (dimethyl, diethyl, or dipropyl) is added and the mixture boiled. The alc. formed in the reaction is continuously distilled The reaction is considered complete as soon as the alc. added in the beginning begins to distill. Eleven esters of malonic acid CH2(CO2R)2 (R = n-Pr, n-Bu, sec-Bu, n-C5H11), n-C6H13, cyclohexyl, n-C7H15, PhCH2, n-C9H19, or n-C10H21) were obtained in good yields (69.9 to 96.6%), their physicochem. constants agreed well with those reported in the literature. Transesterification proceeds easily if the difference in the b.ps. of the alc. taken and the alc. formed in the reaction is large. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Recommanded Product: malonic acid dibutyl ester).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: malonic acid dibutyl ester

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Propellanes. Part LXXXII. Preparation and labeling of [20.3.3]propellane-24,27-dione was written by Ashkenazi, Pnina;Kettenring, Juergen;Migdal, Shmuel;Gutman, Arie L.;Ginsburg, David. And the article was included in Helvetica Chimica Acta in 1985.SDS of cas: 3903-40-0 This article mentions the following:

The title compound I was prepared by Kolbe’s electrochem. reaction of MeO₂C(CH₂)₁₀CO₂H to give MeO₂C(CH₂)₂₀CO₂Me which was treated with Na and Me₃SiCl in PhMe, and then aqueous HCl-THF to give 89% the hydroxy ketone II (R = OH, R¹ = H). Treatment of II with Bi₂O₃ in AcOH gave 77% the diketone II (RR¹ = O) which was treated with MeO₂CCH₂COCH₂CO₂Me and KOH in MeOH-C₆H₆ for 10 days, followed by 6N HCl to give 83.3% I. Treatment of I with D₂O and HCl in a sealed tube at 120° achieved more than 90% incorporation of ²H at the positions α to the carbonyls. However, similar treatment of I with tritiated water achieved only 3% ³H-incorporation. In the experiment, the researchers used many compounds, for example, 12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0SDS of cas: 3903-40-0).

12-Methoxy-12-oxododecanoic acid (cas: 3903-40-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. SDS of cas: 3903-40-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Selective cyclization of alkynols and alkynylamines catalyzed by potassium tert-butoxide was written by Li, Deng Yuan;Shi, Ke Ji;Mao, Xiao Feng;Zhao, Zheng Le;Wu, Xin Yan;Liu, Pei Nian. And the article was included in Tetrahedron in 2014.Synthetic Route of C13H15NO2 This article mentions the following:

Potassium tert-butoxide (t-BuOK) was found to be an effective catalyst for the cyclization of aromatic alkynols and alkynylamines. In the presence of 10 mol % t-BuOK, a range of alkynols were converted to the corresponding exo-cyclic enol ethers as pure Z-stereoisomers with 100% selectivity and moderate to excellent yields. Moreover, the cyclization of alkynylamines was also achieved to afford indoles and isoindolin-1-ones in good yields. In the experiment, the researchers used many compounds, for example, tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3Synthetic Route of C13H15NO2).

tert-Butyl (3-ethynylphenyl)carbamate (cas: 185619-66-3) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Synthetic Route of C13H15NO2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics