Tag: M.W=150-200

Trivedi, G. V. N. published the artcileCryogenic conditioning of microencapsulated phase change material for thermal energy storage, Recommanded Product: Dimethyl adipate, the publication is Scientific Reports (2020), 10(1), 18353, database is CAplus and MEDLINE.

Microencapsulation is a viable technique to protect and retain the properties of phase change materials (PCMs) that are used in thermal energy storage (TES) applications. In this study, an organic ester as a phase change material was microencapsulated using melamine-formaldehyde as the shell material. This microencapsulated PCM (MPCM) was examined with cyclic cryogenic treatment and combined cyclic cryogenic heat treatment processes. The surface morphol. studies showed that the shell surfaces had no distortions or roughness after cryogenic treatment. The cryogenically conditioned microcapsules exhibited diffraction peak intensity shifts and crystal structure changes. The onset of melting for the nonconditioned and conditioned microcapsules were measured to be 8.56-9.56°C, resp. Furthermore, after undergoing the cryogenic and heat treatment processes, the PCM microcapsules had appreciable latent heat capacities of 39.8 kJ/kg and 60.7 kJ/kg, resp. Addnl., the microcapsules were found to have good chem. stability after the cryogenic treatment. In addition, the cryogenically conditioned microcapsules were found to be thermally stable up to 128.9°C, whereas the nonconditioned microcapsules were stable up to 101.9°C. Based on the test results, it is obvious that the cryogenically conditioned microcapsules exhibited good thermal properties and are very desirable for cool thermal energy storage applications.

Scientific Reports published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C7H8BFO2, Recommanded Product: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Trivedi, G. V. N. published the artcileMicroencapsulated phase change material suspensions for cool thermal energy storage, Synthetic Route of 627-93-0, the publication is Materials Chemistry and Physics (2020), 122519, database is CAplus.

In this study, di-Me adipate, an organic ester, as the phase change material (core) was microencapsulated into melamine-formaldehyde (shell) in different shell-to-core ratios using in-situ polymerization technique. The microencapsulated phase change material suspensions (MPCMS) were prepared through the dispersion of microcapsules in appropriate proportions into the carrier fluid. The surface morphol. of the prepared microcapsules were observed to be almost spherical. The microcapsules with low crystallinity offered greater resistance towards crack, which was attributed to the flexible structure of the shell. Surface structure studies has confirmed the chem. stability between the core and shell. In addition, the microcapsules exhibited good latent heat enthalpy of around 53 kJ/kg and 70 kJ/kg and they were thermally stable up to 160°C. Furthermore, the viscosity of MPCMS was found to be very low, which enabled them to exhibit Newtonian flow behavior. Thus, the test results have signified the MPCMS to be considered as a viable candidate for cool thermal energy storage application.

Materials Chemistry and Physics published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H11BO2, Synthetic Route of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dhalani, Jayesh published the artcileRapid identification of fatty acids from Leptadenia reticulata areal parts by GC-MS, Recommanded Product: Dimethyl adipate, the publication is Journal of Scientific & Industrial Research (2020), 79(8), 709-711, database is CAplus.

The investigation was carried out to identify the various fatty acids present in the areal parts of Leptadenia reticulata, one of the important medicinal plants of India. Non-polar (Petroleum Ether) extract of areal parts was used for this study. Saponification was carried out using dried extract to obtain fatty acids. Further esterification of saponifiable fraction was performed to obtain fatty acid Me ester. Extracted fatty acid Me esters were analyzed by gas chromatog. and mass spectrometry (GC-MS) technique using NIST library. From GC-MS anal., 14 components were identified in areal parts of Leptadenia reticulata. This study reveals that L. reticulata is a good source of fatty acids with medicinal properties. This methodol. has the advantage of excellent identification of Non polar moiety of medicinal plant.

Journal of Scientific & Industrial Research published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Recommanded Product: Dimethyl adipate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Khan, Danish published the artcileDesign, Synthesis and Characterization of Aurone Based α,β-unsaturated Carbonyl-Amino Ligands and their Application in Microwave Assisted Suzuki, Heck and Buchwald Reactions, Synthetic Route of 103-26-4, the publication is Asian Journal of Organic Chemistry (2022), 11(1), e202100638, database is CAplus.

A new series of phosphine-free aurone-based α,β-unsaturated carbonyl-amino bidentate ligands I [R¹ = 2-furanyl, Ph, 3-4-dimethoxyphenyl, etc.; R² = Ph, 3-nitrophenyl, 1-naphthyl, etc.] were synthesized and characterized via different anal. techniques such as IR, ¹H-NMR, ¹³C-NMR and mass spectrometry. Moreover, the structure of ligand I [R¹ = 2-furanyl; R² = 2-nitrophenyl] was also characterized by single-crystal X-ray diffraction. The synthesized ligands I with the PdCl₂ salt showed excellent catalytic activity in the Suzuki-Miyaura, Mizoroki-Heck and Buchwald-Hartwig reactions. A broad range of substrates including heterocycles, chalcones and sterically hindered coupling partners were well tolerated in the developed protocol. Addnl., the metal complex formed in the catalytic cycle was characterized by ¹H-NMR spectroscopy and mass spectrometry.

Asian Journal of Organic Chemistry published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Synthetic Route of 103-26-4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kus, Piotr M. published the artcileDevelopment of supercritical CO₂ extraction of bioactive phytochemicals from black poplar (Populus nigra L.) buds followed by GC-MS and UHPLC-DAD-QqTOF-MS, Related Products of esters-buliding-blocks, the publication is Journal of Pharmaceutical and Biomedical Analysis (2018), 15-27, database is CAplus and MEDLINE.

The supercritical CO₂ (SC-CO₂) extraction process of black poplar (Populus nigra L.) buds was optimized (pressure, temperature) based on the yields of major phytochems. (volatiles and non-volatiles). The optimal settings were 30 MPa/60°C. Major volatiles determined by GC-MS in the optimized SC-CO₂ extract (mg of benzyl salicylate equivalent (BSE) per 100 g of buds) were: pinostrobin chalcone (1574.2), β-eudesmol (640.8), α-eudesmol (581.9), 2-methyl-2-butenyl-p-coumarate (289.9), pentyl-p-coumarate (457.0), γ-eudesmol (294.4), and benzyl salicylate (289.2). Partial qual. similarity was observed between SC-CO₂ extracts and corresponding hydrodistd. essential oil dominated by sesquiterpenes, but with lower yields. Major compounds (mg per 100 g of buds) identified by UHPLC-DAD-QqTOF-MS in the optimized SC-CO₂ extract were: pinostrobin (751.7), pinocembrin (485.6), 3-O-pinobanksin acetate and methyl-butenyl-p-coumarate (290.2; 144.9 of pinobanksin and p-coumaric acid equivalent, resp.). SC-CO₂ extraction was found useful for green, efficient and simultaneous extraction of both volatile/non-volatile, bioactive phytochems. of poplar buds – precursors of poplar-type propolis.

Journal of Pharmaceutical and Biomedical Analysis published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Demarteau, Jeremy published the artcileAminolytic upcycling of poly(ethylene terephthalate) wastes using a thermally-stable organocatalyst, Application In Synthesis of 627-93-0, the publication is Polymer Chemistry (2020), 11(30), 4875-4882, database is CAplus.

Poly(ethylene terephthalate) (PET) is one of the most commonly used plastics for a wide range of applications, but is also one on the main contributors to the accumulation of plastic waste in the environment. Herein, we propose an aminolytic method to depolymerise PET using various amino-alcs. by organocatalysis and their subsequent use for the production of poly(ester-amide)s. This research aims to highlight the potential of thermally stable acid-base mixtures for depolymerization of PET in the presence of amines, specifically TBD : MSA. The chemoselectivity of the process favors the formation of diol terephthalamides in high yields. Different amino alcs. are also explored in order to obtain diols with secondary amine or ether functionalities. Finally, these novel terephthalamide diols are investigated as novel synthons for the synthesis of poly(ester-amide)s, showing potential for the “creative reuse” of plastic wastes.

Polymer Chemistry published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C8H14O4, Application In Synthesis of 627-93-0.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Favarao, J. published the artcileEffect of curing-light attenuation on color stability and physical and chemical properties of resin cements containing different photoinitiators, SDS of cas: 10287-53-3, the publication is Journal of the Mechanical Behavior of Biomedical Materials (2021), 104110, database is CAplus and MEDLINE.

This study aimed to evaluate the effect of light attenuation by ceramic veneers on the degree of conversion (DC), flexural strength (FS) and color change (CC) of resin cements containing different photoinitiators. Thus, samples included resin cements containing different photoinitiators: (a) camphorquinone (CQ)/ethyl 4-(dimethylamino)benzoate (EDMAB); (b) CQ/4-(N,N-dimethylamino) phenethyl alc. (DMPOH); (c) CQ/2(dimethylamino) Et methacrylate (DMAEMA); (d) CQ/ethyl 4-(dimethylamino)benzoate (EDMAB) + diphenyl(2,4,6-trimethylbenzoyl)-phosphine oxide (TPO); (e) TPO; and (f) phenylbis(2.4.6-trimethylbenzoyl)phosphine oxide (BAPO). Ceramic veneers (10 x 10 mm) were 0.4 mm, 0.7 mm, 1.0 mm or 1.5 mm thick. The light irradiance of a multiple-peak LED through ceramic veneers was measured (n = 5) using a spectrometer. DC (micro-Raman spectrometer) and FS (Bar-shaped specimens) were tested in cements with and without the veneers. Color change was evaluated before and after UV artificial aging. Data were submitted to ANOVA and Tukey’s test (α = 0.05). The violet spectrum showed the lowest irradiance values through the veneer, considering all thicknesses. BAPO had the highest DC values for all veneers. CQ/EDMAB + TPO, CQ + EDMAB, and CQ + DMPOH showed similar DC values concerning all thicknesses. TPO (1.0 mm) showed the lowest DC and FS values. CQ + TPO and CQ/amines showed similar FS values. CQ + EDMAB and CQ + DMAEMA showed the highest color change values while TPO showed the lowest. It was concluded that the phys. and chem. properties of the resin cement were improved with BAPO. CQ/EDMAB + TPO showed the greatest color stability, considering all veneer groups and control, without affecting the other properties assessed.

Journal of the Mechanical Behavior of Biomedical Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, SDS of cas: 10287-53-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sessa, Francesco published the artcileExperimental Quantum Chemistry: A Hammett-inspired Fingerprinting of Substituent Effects, Recommanded Product: 3-(Methoxycarbonyl)benzoic acid, the publication is ChemPhysChem (2021), 22(6), 569-576, database is CAplus and MEDLINE.

The quantum mech. calculable Q descriptor is shown to be a potent quantifier of chem. reactivity in complex mols. – it shows a strong correlation to exptl. derived field effects in non-aromatic substrates and Hammett σm and σp parameters. Models for predicting substituent effects from Q are presented and applied, including on the elusive pentazolyl substituent. The presented approach enables fast computational estimation of substituent effects, and, in extension, medium-throughput screening of mols. and compound design. An exptl. dataset is suggested as a candidate benchmark for aiding the general development and comparison of electronic structure analyses. It is here used to evaluate the exptl. quantum chem. (EQC) framework for chem. bonding anal. in larger mols.

ChemPhysChem published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C6H3ClFNO2, Recommanded Product: 3-(Methoxycarbonyl)benzoic acid.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Serrano-Arnaldos, Mar published the artcileSustainable synthesis of branched-chain diesters, Formula: C8H14O4, the publication is Journal of Biotechnology (2021), 91-99, database is CAplus and MEDLINE.

Esters from branched alcs. and dicarboxylic linear acids are widely used as lube bases due to their good performance at low temperatures This work proposes a new process to synthesize bis(2-ethylbutyl) adipate and bis(2-ethylbutyl) sebacate by using the lipase-based catalyst Novozym 435 in a solvent-free system. Different reaction strategies have been tested in order to minimize 2-ethyl-1-butanol losses due to its evaporation and optimum operation conditions have been determined: 2.5% of biocatalyst, 50°C and a molar excess of alc. of 15% for the adipic diester and of 25% for the sebacic one. It has also been proven that the immobilized enzyme can be reused in seven successive reaction cycles, achieving high yields without an appreciable reduction of activity. This biocatalytic pathway is a promising basis for the development of a more sustainable large scale process for obtaining biodegradable lubricants, as it is pointed out by productivity, economic and green metrics calculations

Journal of Biotechnology published new progress about 627-93-0. 627-93-0 belongs to esters-buliding-blocks, auxiliary class Ploymers, name is Dimethyl adipate, and the molecular formula is C21H24O8, Formula: C8H14O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Topa, Monika published the artcileNovel effective photoinitiators for the production of dental fillings, Synthetic Route of 10287-53-3, the publication is Journal of Photopolymer Science and Technology (2021), 34(3), 259-262, database is CAplus.

Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method. Moreover it guarantees low energy consumption. Therefore the photopolymerization is used in many scientific disciplines, including dentistry for production photocurable dental materials. In this work, the new photoinitiating systems based on camphoroquinone (CQ) and iodonium salts with tosyl anion for initiation of photopolymerization of the acrylates monomers bisphenol A – glycidyl methacrylate (BisGMA) and triethyleneglycol dimethacrylate (TEGDMA) was studied. As a reference, camphorquinone (CQ) and Et 4-(dimethylamino)benzoate (EDB) photoinitiating system was used.

Journal of Photopolymer Science and Technology published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C37H30ClIrOP2, Synthetic Route of 10287-53-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics