Category: esters-buliding-blocks

Yuan, Jiajia published the artcileFabricating superhydrophobic surfaces via coating amine-containing fluorinated emulsion and Michael addition reaction, Safety of Trimethylolpropane triacrylate, the publication is Journal of Coatings Technology and Research (2022), 19(4), 1187-1198, database is CAplus.

In this work, highly fluorinated acrylate emulsions with reliable stability emulsified by protonated octadecylamine were successfully synthesized. With appropriate protonation, the obtained emulsion showed high monomer conversions up to 90.2% and ultralow surface energy. The ultralow-surface-energy coatings were fabricated via surface enrichment of abundant fluorine and replacing hydrophilic amino groups with hydrophobic groups through the Michael addition reaction. Superhydrophobic and self-cleaning surfaces were prepared on porous substrates through dip coating. When fabricated on porous glass fiber nonwoven mats, surfaces coated with enriching fluorinated side chains and few hydrophilic groups showed remarkable superhydrophobicity with a water contact angle more than 150° and a low sliding contact angle of 4.7°. The usage of fluorinated emulsions was sharply reduced due to the addition of perfluorinated acrylate. Moreover, the Michael acceptors were alternative such as perfluorinaed acrylates, long aliphatic acrylates and crosslinking acrylates, displaying superior hydrophobicity and waterproof properties. All the results conclusively indicated that this practical modified method was promising for potential applications of hydrophobic modifications. Graphical abstract: [graphic not available: see fulltext].

Journal of Coatings Technology and Research published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C9H21NO3, Safety of Trimethylolpropane triacrylate.

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

Jung, Woo-Ok published the artcileRegio- and Enantioselective Iridium-Catalyzed Amination of Alkyl-Substituted Allylic Acetates with Secondary Amines, COA of Formula: C22H38N4O8, the publication is Organic Letters (2022), 24(1), 441-445, database is CAplus and MEDLINE.

Robust air-stable cyclometalated π-allyliridium C,O-benzoates modified by (S)-tol-BINAP catalyze the reaction of secondary aliphatic amines with racemic alkyl-substituted allylic acetates to furnish products of allylic amination with high levels of enantioselectivity. Complete branched regioselectivities were observed despite the formation of more highly substituted C-N bonds.

Organic Letters published new progress about 1523571-10-9. 1523571-10-9 belongs to esters-buliding-blocks, auxiliary class Azetidine,Salt,Spiro,Amide, name is tert-Butyl 1,6-diazaspiro[3.3]heptane-1-carboxylate oxalate(2:1), and the molecular formula is C22H38N4O8, COA of Formula: C22H38N4O8.

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

Kim, Yun Ho published the artcileFabrication of a Superhydrophobic Surface from a Smectic Liquid-Crystal Defect Array, Category: esters-buliding-blocks, the publication is Advanced Functional Materials (2009), 19(18), 3008-3013, database is CAplus.

A novel fabrication method is developed for the preparation of superhydrophobic surfaces. The procedure uses focal conic structures of semi-fluorinated smectic liquid crystals (LCs) whose periodic toric focal conic domains (TFCDs) are prepared on a surface modified substrate. Reactive ion etching (RIE) on the periodic TFCD surface leads to a superhydrophobic surface with a water contact angle of ∼160° and a sliding angle of ∼2° for a 10 μL water droplet. The results show that this phenomenon is due to the development of a dual-scale surface roughness arising from the nanoscale protuberance caused by applying the RIE process to the top of the microscale TFCD arrays. The unique surface behavior is further verified by demonstrating that RIE on a flat lamellar liquid crystal film, in which the director is aligned parallel with surface, results in a relatively low hydrophobicity as compared to when periodic TFCDs are subjected to REI. The observations made in this publication suggest that a new approach exists for selecting potential candidates of superhydrophic surface formation based on spontaneous self-assembly in smectic liquid-crystalline materials.

Advanced Functional Materials published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Category: esters-buliding-blocks.

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

Kim, Yun Ho published the artcileSelf-assembled periodic liquid crystal defects array for soft lithographic template, Computed Properties of 50670-76-3, the publication is Soft Matter (2010), 6(7), 1426-1431, database is CAplus.

We have developed highly periodic patterns with sub-micrometer features over large-areas using toric focal conic domains (TFCDs) originated from smectic liquid crystal (LC) as a new self-assembling building block. TFCDs are accomplished by precisely controlling the surface and interfacial properties of smectic LC. In order to apply the smectic liquid crystal defect arrays in soft lithog., the hexagonal arrays of domain patterns are used as molds for UV curable polymers, thereby providing LC defect stamps with high spatial resolution over large areas. Our method was further utilized to transfer patterns with sub-micrometer features from the polymer stamp surface to a secondary surface by microcontact printing (μ-CP). Accordingly, we show that such LC materials can be very strong candidates for the periodic templates, compared to other soft-building blocks such as block copolymers, colloids and surfactants. We anticipate our finding be a starting point for more sophisticated lithog. applications based on liquid crystalline materials.

Soft Matter published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, Computed Properties of 50670-76-3.

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

Kim, Yun Ho published the artcileEnergy transfer in a π-conjugated liquid crystalline molecule with two chromophores of rigid biphenyl core and pyrene head moieties, HPLC of Formula: 50670-76-3, the publication is Journal of Nanoscience and Nanotechnology (2009), 9(12), 6968-6973, database is CAplus and MEDLINE.

We investigate the energy transfer of a highly ordered π-conjugated liquid crystalline mol. containing two chromophores of biphenyl and pyrene moiety, in which the mol. was prepared by esterification of fluorinated biphenyl compound and 1-pyrenebutanol. DSC, POM and XRD results show that this mol. forms a highly ordered smectic liquid crystalline mesophase, in which the π-conjugated mol. was strongly packed together over large-areas. We show that the liquid crystalline bi-chromophoric systems with highly ordered structure exhibit the energy hopping and transfer to the chromophore with the energetically lowest S₁ state. From the single-mol. spectroscopy of the biphenyl and pyrene chromophore in solution, we show an intramol. energy transfer from biphenyl to pyrene moieties. In solid thin film, highly ordered structure of the liquid crystal plays a significant role in the formation of the excimer and perfect energy transfer between the chromophores.

Journal of Nanoscience and Nanotechnology published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, HPLC of Formula: 50670-76-3.

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

Yoon, Dong Ki published the artcileLiquid-crystal periodic zigzags from geometrical and surface-anchoring-induced confinement: Origin and internal structure from mesoscopic scale to molecular level, SDS of cas: 50670-76-3, the publication is Physical Review E: Statistical, Nonlinear, and Soft Matter Physics (2010), 82(4-1), 041705/1-041705/6, database is CAplus and MEDLINE.

We figured out periodic undulations of lamellae “zigzags” in liquid crystals under confinement by glass and patterned silicon hybrid cell, but in the absence of applied fields. The optical and internal structures of zigzags have been investigated from mesoscopic scale to mol. level by convoluting real and reciprocal space probes, such as polarized light microscopy, SEM, and microbeam x-ray diffraction. The homeotropic anchoring happens at air/liquid crystal, while planar one appears at glass or patterned silicon surfaces. The wetting and displacement of lamellae near the glass surface give rise to tilting and bending in the stacking of lamellae. This can provide a solution for the origin of periodic zigzags: asym. strain exerted to lamellae at two-dimensional glass surface and one-dimensional-like pattern. This can give a hint for potential photonic applications such as optical gratings and modulators due to its high periodicity.

Physical Review E: Statistical, Nonlinear, and Soft Matter Physics published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H24S, SDS of cas: 50670-76-3.

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

Otsu, Takayuki published the artcileLiving radical polymerizations in homogeneous solution by using organic sulfides as photoiniferters, Related Products of esters-buliding-blocks, the publication is Polymer Bulletin (Berlin, Germany) (1982), 7(1), 45-50, database is CAplus.

Polystyrene was prepared by living radical polymerization in homogeneous solution using 4 organic sulfide initiator-transfer agent-terminators (photoiniferters). styrene  [100-42-5] Photopolymd, with diphenyl disulfide (I) [882-33-7], tetraethylthiuram disulfide  [97-77-8], benzyl diethyldithiocarbamate  [3052-61-7] and 2-phenylethyl diethyldithiocarbamate  [3052-60-6] gave polymers with yields and average-mol. weights increased as a function of the reaction time. These polymerizations proceeded via a living radical mechanism. When these photoiniferters except I were used, the propagating polymer chain end was always the Et₂NCSS group, which can further photodissoc. into a reactive propagating radical and a less reactive small radical Et₂NCSS· in order to result in successive insertion of monomer mols. into the dissociated bond.

Polymer Bulletin (Berlin, Germany) published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Related Products of esters-buliding-blocks.

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

Otsu, Takayuki published the artcileA model for living radical polymerization, Synthetic Route of 3052-61-7, the publication is Makromolekulare Chemie, Rapid Communications (1982), 3(2), 133-40, database is CAplus.

The polymerization of Me methacrylate  [80-62-6] takes place by living radical homogeneous solution polymerization in the presence of PhN:NCPh₃  [981-18-0] (thermal iniferter) or Et₂NCS₂CH₂Ph [3052-61-7] (photoiniferter). The functionally terminated poly(Me methacrylate) obtained with these iniferters was capable of further polymerization with added monomer.

Makromolekulare Chemie, Rapid Communications published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Synthetic Route of 3052-61-7.

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

Nagasawa, Kinzo published the artcileSeparation and detection of carbamates and related compounds on polyamide layers, HPLC of Formula: 3052-61-7, the publication is Journal of Chromatography (1970), 52(3), 453-9, database is CAplus and MEDLINE.

The separation and detection of 22 carbamates and related compounds including insecticidal or herbicidal materials in current use, were investigated on polyamide layers. Suitable solvent systems and the Rf data are reported. A new spray reagent, pinacryptol yellow, was examined for the detection of these compounds and its usability was acertained. A comparison was also made between detection limits by uv absorption on polyamide and silica gel layers, and the superiority of the polyamide layers was confirmed.

Journal of Chromatography published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, HPLC of Formula: 3052-61-7.

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

Hu, Deqing published the artcileBiaryl and atropisomeric biaryl aldehyde synthesis by one-step, metal-free benzannulation of aryl enals and propiolates, Formula: C7H13NO2, the publication is Green Chemistry (2020), 22(20), 6773-6777, database is CAplus.

A new method involving the benzannulation of aromatic enals ArCH=CHCHO (Ar = C₆H₅, 2-furyl, 1-naphthyl, etc.) and two alkyl propiolate mols. CHCC(O)₂R (R = Me, Et, t-Bu) has been developed as a powerful route to biaryl aldehydes I simply via the promotion of di-Me amine. The benzannulation process in the absence of an oxidant additive tolerates successfully the formyl group in the enal component, leading to a straightforward one-step synthesis of biaryl and atropisomeric aldehydes I. An enamine activation based on the aza-Michael addition of di-Me amine to the propiolate and the amine elimination-based generation of cyclohexadiene intermediate constitute the major factors enabling the titled reactions.

Green Chemistry published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Formula: C7H13NO2.

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