Author: tianli

Xu, Can published the artcileA class of azocarbazole-based carboxylates: high-efficiency ionic unimolecular photobase generators for thiol-epoxy click polymerization under blue light, Related Products of alcohols-buliding-blocks, the main research area is azocarbazole carboxylate ionic unimol photobase generator; thiol epoxy click polymerization blue light.

Two new unimol. azocarbazole-based visible photobase generators (Ac-C-Base) with different strong bases such as 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and 1,1,3,3-tetramethylguanidine (TMG) as the potential active species were prepared Their structures were confirmed by 1H NMR, 13C NMR, and HR-MS. According to the photolysis and EPR results, Ac-C-Base could generate free radicals and strong bases simultaneously through the photodecarboxylation mechanism under 455 nm LED irradiation Thus they can effectively catalyze the thiol-epoxy polymerization without post exposure baking under light exposure. In addition, the Ac-C-TBD containing a stronger base shows a faster polymerization rate and higher epoxy conversion.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Newell, Grace E. published the artcilePreparation of a clickable monomer compatible with automated PNA synthesis, Category: alcohols-buliding-blocks, the main research area is peptide nucleic acid thymine monomer synthesis; reductive amination PNA monomer incorporation PNA Click chem.

A propargyl-containing Fmoc-protected (Fmoc = 9-fluorenylmethoxycarbonyl) thymine monomer was synthesized for possible use in the pre- or post-functionalization of PNA oligomers via Click chem. The monomer should be suitable for incorporation in normal automated solid phase PNA synthesis. The synthesis is suitable for the preparation of gram-quantities of monomers and uses reductive amination as the key step.

Tetrahedron Letters published new progress about Click chemistry. 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Shin, Jaeman J. published the artcileEffect of site-specific functionalization on the shape of nonspherical block copolymer particles, Synthetic Route of 7575-23-7, the main research area is nonspherical butadiene styrene diblock copolymer particle functionalization shape; block copolymer; particle shape; site-specific functionalization; thiol-ene.

Shape-anisotropic polymeric colloids having chem. distinct compartments are promising materials, however, introducing site-sp. surface functionality to block copolymer particles has not yet been actively investigated. The current contribution demonstrates the selective surface functionalization of nanostructured, ellipsoidal polystyrene-b-polybutadiene (PS-b-PB) particle and investigate their effects on the particle shape. Photo-induced thiol-ene click reaction was used as a selective functionalization chem. for modifying the PB block, which was achieved by controlling the feed ratio of functional thiols to the double bonds in PB. Importantly, the controlled particle elongation was observed as a function of the degree of PB functionalization. Such an increase in the aspect ratio is attributed to the (i) increased incompatibility of the PS and modified PB block and (ii) the reduced surface tension between the particles and surrounding aqueous medium, both of which contributes to the further elongation of ellipsoids. Further tunability of the elongation behavior of ellipsoids was further demonstrated by controlling the particle size and chem. structure of functional thiols, showing the versatility of this approach for controlling the particle shape. Finally, the utility of surface functionality was demonstrated by the facile complexation of fluorescent dye on the modified surface of the particle via favorable interaction, which showed stable fluorescence and colloidal dispersity.

Polymers (Basel, Switzerland) published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wu, Chia-Hui published the artcileSimple and Practical Real-Time Analysis of Solid-Phase Reactions by Thin-Layer Chromatography, Application In Synthesis of 87905-98-4, the main research area is glycoside solid phase preparation TLC reaction analysis; triazole solid phase preparation TLC reaction analysis; amino acid solid phase preparation TLC reaction analysis.

Solid-phase synthesis is a practical approach for simplifying the time-consuming and routine purification steps in the preparation of numerous naturally occurring mols.; however, studying such reactions is difficult due to the lack of a convenient monitoring method. By using thin-layer chromatog. in conjunction with a photolabile linker on a resin, we developed a convenient and simple method for monitoring solid-phase reactions in real time by thin-layer chromatog. This method provides a user-friendly protocol for examining reaction conditions for solid-state syntheses.

Synlett published new progress about Click chemistry. 87905-98-4 belongs to class alcohols-buliding-blocks, name is Benzyl (5-hydroxypentyl)carbamate, and the molecular formula is C13H19NO3, Application In Synthesis of 87905-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yan, Bo published the artcilePluronic F127 gels fabricated by thiol-ene click chemistry: preparation, gelation dynamics, swelling behaviors and mechanical properties, Application In Synthesis of 7575-23-7, the main research area is Pluronic F127 fabricated thiol ene click chem gelation swelling.

Click chem. is an effective tool to fabricate three-dimensional gel network in an accurate way. In this work, Pluronic F127 gels are prepared by thiol-ene click chem., utilizing double-bond end-capped Pluronic F127 (F127DA) and pentaerythritol tetras-mercaptopropionate (PETMP) as the starting materials and triethylamine as the catalyst. Both the mass fraction of F127DA and the initial concentration of PETMP have effects on the properties of the resulting F127 gels. The optimized F127 gel prepared under a F127DA mass fraction of 15 wt% and a PETMP concentration of 17.62 mmol/L exhibits the highest swelling ratio (10) and has the largest elongation at break (194%). When the F127DA mass fraction and PETMP concentration are fixed at 15 wt% and 48.26 mmol/L, resp., the resulting F127 gel has a high stress of 0.25 MPa. The present example has presented a method to fabricate three-dimensional gel network in a controlled way.

Polymer Bulletin (Heidelberg, Germany) published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application In Synthesis of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tian, Guangming published the artcilePhotodirected 2D-to-3D morphing structures of shape memory polycaprolactone/W18O49 nanowires composite film, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is tungsten oxide polycaprolactone composite film photodirected shape memory effect.

Shape memory materials possess programmable complex and large deformations toward external stimuli, which are particularly essential for their potential applications. For the transformation of planar two-dimensional (2D) structures into complex 3D structures, the design of asym. or bilayer thin sheets is usually required. In this paper, we propose a facile strategy to achieve these complex 3D structures that can be transformed to various pre-determined shapes sequentially by laser-triggered site-specific deformations. The response of shape memory polycaprolactone (PCL) to laser is realized by phys. doping W18O49 nanowires into the cross-linked PCL diacrylate matrix. When irradiated by 98 mW cm-2 laser, the pre-stretched PCL/W18O49 film shows an out-of-plane bending deformation due to the temperature gradient and single-domain orientation on the thickness between the upper layer and lower layer. The bending rates and amplitudes of the film can be tailored by adjusting the parameters of irradiation time, the film thickness as well as the pre-stretch strain. Remarkably, the pre-stretched film can automatically bend in more intricate complex deformations by integration with kirigami cuts in planar. Finally, we demonstrate that by activating the dynamic transesterification reaction within the same film, it can also achieve the 2D-to-3D transformations. With these decent features, this kind of novel PCL//W18O49 film shows great potential in the field of biomedical devices or soft robotics.

Science China Materials published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gablier, Alexandra published the artcileTransesterification in Epoxy-Thiol Exchangeable Liquid Crystalline Elastomers, Safety of Pentaerythritol tetra(3-mercaptopropionate), the main research area is transesterification epoxy thiol exchangeable liquid crystalline elastomer.

The incorporation of vitrimer bond-exchange chem. into liquid crystalline elastomer networks produces “”exchangeable liquid crystal elastomers”” (xLCE). These materials offer a facile method of material reshaping and alignment post-polymerization via the application of a mech. stress above the temperature of activation of bond exchange. We use diepoxy mesogenic monomers with thiol-terminated spacers and crosslinker to investigate a range of resulting xLCE. The “”click”” chem. of thiols results in good control over the network topol. and low glass transition in this family of materials. By combining different spacers, we were able to obtain smectic and nematic phases and adjust the liquid crystal to the isotropic phase transition between 42 and 140°C, while the elastic-plastic transition temperature was maintained close to 200°C. The broad gap between these temperatures ensures that thermally actuating uniformly aligned elastomers are stable and show no residual plastic creep, making epoxy-thiol xLCE promising for a range of engineering applications.

Macromolecules (Washington, DC, United States) published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Safety of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sharma, Sadhana published the artcileThe effects of processing variables on electrospun poly(ethylene glycol) fibrous hydrogels formed from the thiol-norbornene click reaction, Synthetic Route of 7575-23-7, the main research area is PEG norbornene PEO I2959click reaction tissue engineering shear modulus.

Electrospinning has been used to create scaffolds with tunable micro/nano architecture, stiffness, and porosity to mimic native extracellular matrix. This study investigated the effects of electrospinning parameters and hydrogel formulation (solvent and crosslinker type) on the architecture and properties of fibrous poly(ethylene glycol) (PEG) hydrogels formed from a photoclick thiol-norbornene reaction. Fibrous hydrogels were prepared using hydrogel precursors (four-arm PEG norbornene and multi-thiol crosslinker), sacrificial poly(ethylene oxide) (PEO, 400 kDa), and photoinitiator (I2959) in either 2,2-triflouroethanol (TFE) or water. Three thiol crosslinkers- 2,2′-(ethylenedioxy)diethanethiol (EDT), pentaerythritol tetrakis(3mercaptopropionate) (PTMP), and PEG dithiol (PEGDT)- were investigated. Fibrous PEG networks with uniform fibers were produced at applied voltages of 10 or 12 kV for TFE and 16 kV for water. Fiber diameters of electrospun hydrogels were largely affected by the solvent when combined with PEO concentration and ranged from 0.5 to 3.5 mm in dry state. While the effect of crosslinker type on fiber diameter, morphol., and porosity of the fibrous hydrogel was minimal, it did modulate its shear modulus. To this end, this study provides the groundwork for selecting processing parameters to achieve desired properties of fibrous PEG thiol-norbornene hydrogels for intended tissue engineering applications ranging from neural, cardiovascular to musculoskeletal.

Journal of Applied Polymer Science published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Luo, Guanzhou published the artcileFacile fabrication of an F-POSS polymer-based liquid-repellent Cu mesh with excellent durability and self-cleaning performance, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is octavinyl polyhedral oligomeric silsesquioxane copper polymer durability.

A facile method that combines alkali-assisted oxidation and -SH chelation with a click chem. reaction was employed to create an F-POSS polymer surface (fluorinated octavinyl polyhedral oligomeric silsesquioxane polymer)-based Cu mesh (F-POSS-OM). The as-prepared F-POSS-OM surface displayed a cohering hierarchical nano-F-POSS polymer granule/micro-Cu(OH)2 wire structure, which provided a re-entrant geometry needed for liquid-repellency and low liquid sliding angles (<15°). Moreover, the easy-prepared structure endows the F-POSS-OM with remarkable durability for mech. and chem. damages, including wear abrasion, tape-peeling, 100 cm-height hammer impact, severe hand twisting, strong acid/base/salt solutions, and high temperatures Importantly, F-POSS-OM still retained excellent self-cleaning performance even after being subjected to these damages. Soft Matter published new progress about Click chemistry. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Arslan, Mustafa published the artcileFunctionalization of Poly(oxindole biphenylylene) membranes by photoinduced thiol-yne click chemistry, Quality Control of 7575-23-7, the main research area is polyoxindole biphenylylene membrane functionalization photoinduced click chem property.

The modification of poly(oxindole biphenylylene) (POXI) membranes by photoinduced thiol-yne click approach is presented. Initially, a propargyl-functionalized porous poly(oxindole biphenylylene) (POXI-PG) membrane was prepared by condensation reaction of isatin and aromatic hydrocarbons with a superacid-catalyst. Subsequently, the solution and surface functionalization of POXI-PG by one-step photoinitiated thiol-yne click reaction with various thiol functional mols., namely pentaerythritol tetrakis(3-mercaptopropionate) (PETMP), 1,2-ethanedithiol (EDT) and thiol modified poly(ethylene glycol) Me ether (PEG-SH) was demonstrated. The spectral and thermal investigations via FT-IR, 1H NMR, XPS and DSC analyses confirmed the success of the modification process. The POXI-PG membranes crosslinked with PETMP had the mol. weight cut off (MWCO) reduced from 75 to 5 kg mol-1. They became stable in different organic solvents with permeations between 0.4 and 2.8 L m-2 h-1 bar-1.

Journal of Membrane Science published new progress about Click chemistry. 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