Tag: M.W=400-500

Paruli, Ernesto III published the artcileMolecularly imprinted polymers by thiol-yne chemistry: making imprinting even easier, Quality Control of 7575-23-7, the main research area is thiol ene microsphere molecularly imprinted polymer preparation property.

Molecularly imprinted polymers (MIPs) are synthetic materials with recognition properties comparable to those of antibodies, but with superior physico-chem. stability. Synthesized in the presence of a template, MIPs contain binding sites with high specificity and selectivity for their target. In this work, we explored the radical-mediated thiol-yne chem. as a new approach to MIPs, using propranolol as a model template and acrylic acid as a functional monomer. Thiol-yne chem. proved to be advantageous due to its oxygen tolerance and reactivity with (meth)acrylates. Thus, polymerization was possible in air with no need for previous deoxygenation, which is important for MIPs shaped by micro or nanofabrication. Moreover, the incorporation of ester-based polythiols made the MIPs hydrolyzable in basic and acidic conditions, thus potentially reducing their persistence in the environment. This, together with the possibility of using the well-established library of template-functional monomer(s) pairs based on (meth)acrylates, is expected to rapidly spread the use of the thiol-yne chem. within the imprinting community.

Polymer Chemistry published new progress about Affinity. 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

Qi, Yong published the artcileRotational Periodicity Display of the Tunable Wettability Pattern in a Photoswitch Based on a Response Bilayer Photonic Crystal, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is optical prism warning board anticounterfeiting steganog watermarking complex; bilayer photonic crystal; period; photoswitch; rotation; wettability.

Although the forward diffraction of the three-dimensional (3D) photonic crystal is easily applied to a photoswitch, backward diffraction rainbows are rarely reported. The first rotational photoswitch based on a bilayer 3D photonic crystal with backward diffractions similar to those of two-dimensional photonic crystals was fabricated by vertically combining different thicknesses of nanoparticle templates. When rotating the bilayer photonic crystal, the opening or closing of the rotational photoswitch shows periodic reproducibility values of 30 and 60°. Different periods are regulated by the thickness and scattering effect of the top layer. Moreover, invisible patterns can be encoded and erased by changing the wettability via pH. Because of the decreasing of the refractive index differentials, it will be revealed rapidly when immersed in water. The revealed pattern can be periodically turned on and off by rotating the bilayer photonic crystal. It has great application prospects in optical prism, warning board, anti-counterfeiting, steganog., watermarking, and complex information coding.

ACS Applied Materials & Interfaces published new progress about Band gap. 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

Wu, Dongdong published the artcilePolymers with controlled assembly and rigidity made with click-functional peptide bundles, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is polymer rigidity peptide bundle.

The engineering of biol. mols. is a key concept in the design of highly functional, sophisticated soft materials. Biomols. exhibit a wide range of functions and structures, including chem. recognition (of enzyme substrates or adhesive ligands1, for instance), exquisite nanostructures (composed of peptides2, proteins3 or nucleic acids4), and unusual mech. properties (such as silk-like strength3, stiffness5, viscoelasticity6 and resiliency7). Here the authors combine the computational design of phys. (noncovalent) interactions with pathway-dependent, hierarchical ′click′ covalent assembly to produce hybrid synthetic peptide-based polymers. The nanometer-scale monomeric units of these polymers are homotetrameric, α-helical bundles of low-mol.-weight peptides. These bundled monomers, or ′bundlemers′, can be designed to provide complete control of the stability, size and spatial display of chem. functionalities. The protein-like structure of the bundle allows precise positioning of covalent linkages between the ends of distinct bundlemers, resulting in polymers with interesting and controllable phys. characteristics, such as rigid rods, semiflexible or kinked chains, and thermally responsive hydrogel networks. Chain stiffness can be controlled by varying only the linkage. Furthermore, by controlling the amino acid sequence along the bundlemer periphery, the authors use specific amino acid side chains, including non-natural ′click′ chem. functionalities, to conjugate moieties into a desired pattern, enabling the creation of a wide variety of hybrid nanomaterials.

Nature (London, United Kingdom) published new progress about Hydrogels. 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

Chen, Ziyang published the artcileHydrophobic and thermal-insulating aerogels based on rigid cellulose nanocrystal and elastic rubber, Synthetic Route of 7575-23-7, the main research area is hydrophobic thermal insulating aerogel cellulose nanocrystal elastic rubber; Aerogels; Cellulose nanocrystals; Click reaction; Rubber.

Inspired from the ancient China philosophy of “”coupling hardness with softness””, we attempted the combination of rigid cellulose nanocrystals (CNC) and elastic rubbers to solve the limitations of structural brittleness and water sensitivity of CNC-based aerogels. Three rubber chains with the different chem. structures (silicon rubber, 1,2-polybutadiene, styreneic block copolymer) were covalently bonded on the CNC porous skeleton based on thiol-ene click chem., to fabricate the CNC/rubber composite aerogels. With the introduction of moderate loading levels of rubber, the composites aerogels exhibited low d. and shrinkage, high porosity and sp. surface area and improved mech. performance. Furthermore, the presence of rubber components completely changed the hydrophilic nature of cellulose skeleton as the hydrophobic aerogels, contributing the superior solvents resistance and self-cleaning property. With their advantages on mech. stability, heat insulation and hydrophobicity, the fabricated aerogels in this study exhibited the high added values in various potential applications.

Carbohydrate Polymers published new progress about Aerogels. 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

Kumar, Rajan published the artcileEngineering Spherically Super-Structured Polyamides for the Sustainable Water Remediation, Application In Synthesis of 7575-23-7, the main research area is engineering spherically super structured polyamide sustainable water remediation.

Unlike metal-ornamented hybrid material and linear polymers, we invoked the growth of a biodegradable superstructured cross-linked polyamide-ester material. The material is thermally stable. The thiol-alkene photoclicked material acted as an efficient water remediator. The material efficiently monitored amphiphilic dyes like rhodamine B (RHB), methylene blue (MB), and chronic mercuric ions in water. The adsorption kinetics revealed the material could adsorb >95% dyes within 24 h. The RHB-functionalized polymer could sense mercuric ions too. The D. functional theory (DFT) calculation shows a chelated mercury complex with thioether in the polymer, Poly-Am-RhAll, to form a comparatively more stable complex.

ACS Materials Au published new progress about Chelation. 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

Ma, Zongwen published the artcileCrosslinkable and Chelatable Organic Ligand Enables Interfaces and Grains Collaborative Passivation for Efficient and Stable Perovskite Solar Cells, SDS of cas: 7575-23-7, the main research area is perovskite solar cell crosslinkable chelatable organic ligand passivation; chemical anchoring; collaborative interface-grain engineering; in situ crosslinking; perovskite solar cells; stability.

The organic-inorganic halide perovskite solar cell (PerSC) is the state-of-the-art emerging photovoltaic technol. However, the environmental water/moisture and temperature-induced intrinsic degradation and phase transition of perovskite greatly retard the commercialization process. Herein, a dual-functional organic ligand, 4,7-bis((4-vinylbenzyl)oxy)-1,10-phenanthroline (namely, C1), with crosslinkable styrene side-chains and chelatable phenanthroline backbone, synthesized via a cost-effective Williamson reaction, is introduced for collaborative electrode interface and perovskite grain boundaries (GBs) engineering. C1 can chem. chelate with Sn4+ in the SnO2 electron transport layer and Pb2+ in the perovskite layer via coordination bonds, suppressing nonradiative recombination caused by traps/defects existing at the interface and GBs. Meanwhile, C1 enables in situ crosslinking via thermal-initiated polymerization to form a hydrophobic and stable polymer network, freezing perovskite morphol., and resisting moisture degradation Consequently, through collaborative interface-grain engineering, the resulting PerSCs demonstrate high power conversion efficiency of 24.31% with excellent water/moisture and thermal stability. The findings provide new insights of collaborative interface-grain engineering via a crosslinkable and chelatable organic ligand for achieving efficient and stable PerSCs.

Small published new progress about Chelation. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hu, Yunfeng published the artcileManipulating the Relative Rates of Reaction and Diffusion in a Holographic Photopolymer Based on Thiol-Ene Chemistry, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is thiol ene reaction rate diffusion holog photopolymer.

Properly balanced reaction and diffusion kinetics are crucial for achieving optimal performance in holog. photopolymers. However, a comprehensive study on the effect of reaction and diffusion on the performance of thiol-ene-based holog. photopolymers has not been performed previously. To determine the relationship between reaction and diffusion, the refractive index modulation (Δn) of holog. gratings recorded in a model thiol-ene photopolymer system was evaluated with controlling the rates of reaction and diffusion processes. By changing the mol. weight of the polymer binder, the diffusion rate was varied over orders of magnitudes with the highest Δn of 0.026 achieved at a mol. weight of 2.9 x 104 Da. Meanwhile, the haze was significantly reduced in binders of higher mol. weight Similarly, as the reaction rate was reduced in accordance with lowering the light intensity, the Δn reached a peak value of 0.023 at 7 mW/cm2 and was found to decrease at both higher (2500 lines/mm) and lower (1000 lines/mm) spatial frequencies. In particular, Δn approaching 0 was observed at a very low intensity (2 mW/cm2) and when the binder with a mol. weight as low as 0.5 x 104 Da was used. An analogous formulation incorporating a secondary thiol, which has slower reaction kinetics and a more stable thiyl radical relative to the primary thiol, exhibited a lower Δn , especially at higher spatial frequencies. Through one-step thiol-Michael addition, the functionality of a tetrathiol monomer was reduced to various extents to obtain a series of thiol-ene photopolymers with precise control over gel point conversions, among which the thiol with an average functionality of 3.5 realized the highest Δn of 0.028. An enhanced reactive binder with norbornene pendant groups was also synthesized, and holog. gratings recorded in it showed notably higher Δn at low light intensities compared to those recorded in non-reactive or less reactive binders.

Macromolecules (Washington, DC, United States) published new progress about Diffusion. 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

Hobiger, Viola published the artcileEmulsion Templated Porous Poly(thiol-enes): Influence of Photopolymerisation, Emulsion Composition, and Phase Behaviour on the Porous Structure and Morphology, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is polythiolene emulsion composition photopolymerization; bicontinuous structure; high internal phase emulsions; phase inversion; poly(thiol-enes); polyHIPE; thiol-ene polymerisation.

The 1,6-hexanediol diacrylate (HDDA) or divinyl adipate (DVA) and pentaerythritol tetrakis(3-mercaptopropionate) (TT) were polymerized via a thiol-ene radical initiated photopolymerization using emulsions with a high volume fraction of internal droplet phase and monomers in the continuous phase as precursors. The porous structure derived from the high internal phase emulsions (HIPEs) followed the precursor emulsion setup resulting in an open porous cellularly structured polymer. Changing the emulsion composition and polymerization conditions influenced the resulting morphol. structure significantly. The investigated factors influencing the polymer monolith morphol. were the emulsion phase ratio and surfactant concentration, leading to either interconnected cellular type morphol., bicontinuous porous morphol. or a hollow sphere inverted structure of the polymerized monoliths. The samples with interconnected cellular morphol. had pore diameters between 4μm and 10μm with approx. 1μm Sized interconnecting channels while samples with bicontinuous morphol. featured approx. 5μm wide pores between the polymer domains. The appropriate choice of emulsion composition enabled the preparation of highly porous poly(thiol-enes) with either polyHIPE or bicontinuous morphol. The porosities of the prepared samples followed the emulsion droplet phase share and could reach up to 88%.

Polymers (Basel, Switzerland) published new progress about Emulsions. 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

Muralidharan, Archish published the artcileStereolithographic 3D Printing for Deterministic Control over Integration in Dual-Material Composites, SDS of cas: 7575-23-7, the main research area is resin polyethylene glycol hydrogel 3D printing tissue engineering; 3D printing; composites; hydrogels; integration; interface.

A rapid and facile approach to predictably control integration between two materials with divergent properties is introduced. Programmed integration between photopolymerizable soft and stiff hydrogels is investigated due to their promise in applications such as tissue engineering where heterogeneous properties are often desired. The spatial control afforded by grayscale 3D printing is leveraged to define regions at the interface that permit diffusive transport of a second material in-filled into the 3D printed part. The printing parameters (i.e., effective exposure dose) for the resin are correlated directly to mesh size to achieve controlled diffusion. Applying this information to grayscale exposures leads to a range of distances over which integration is achieved with high fidelity. A prescribed finite distance of integration between soft and stiff hydrogels leads to a 33% increase in strain to failure under tensile testing and eliminates failure at the interface. The feasibility of this approach is demonstrated in a layer-by-layer 3D printed part fabricated by stereolithog., which is subsequently infilled with a soft hydrogel containing osteoblastic cells. In summary, this approach holds promise for applications where integration of multiple materials and living cells is needed by allowing precise control over integration and reducing mech. failure at contrasting material interfaces.

Advanced Materials Technologies (Weinheim, Germany) published new progress about Cartilage. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yang, Jeh-Chang published the artcileOn the nature of shape-fixing in semicrystalline shape-memory networks, Formula: C17H28O8S4, the main research area is phenolthiazine reinforced polymer composite shape memory network mech property.

Crystallization of polymer strands within elastically strained cross-linked networks can lower tension, leading to stabilization of mech. deformed states. This process, referred to as shape-fixing, is sensitive to thermomech. path because both mech. strain and thermal undercooling affect crystallization kinetics. In the present study, shape-fixing of a well-defined poly(caprolactone) network is examined at fixed strains ranging from 25 to 100%. Isothermal crystallization kinetics were studied using wide angle X-ray scattering while simultaneously monitoring tension loss. Plots of tensile stress vs. degree of crystallization show that significant stress reduction occurs at only a few percent crystallinity (<0.05). The development of young's modulus under identical conditions was evaluated, and results are combined to estimate the shape-fixity at different crystallization conditions and times. This study contributes to understanding the interrelationship between crystallization, stress reduction, and material stiffening to support further development of semicrystalline shape-memory networks. Polymer Crystallization published new progress about Annealing. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts