Month: December 2022

Liu, Zhimeng published the artcileIn Situ-Formed Novel Elastic Network Binder for a Silicon Anode in Lithium-Ion Batteries, HPLC of Formula: 517-23-7, the publication is ACS Applied Materials & Interfaces (2021), 13(39), 46518-46525, database is CAplus and MEDLINE.

High energy d. lithium-ion batteries with preferable cycling stability are critical for the development of all-elec. vehicles. Silicon (Si) has demonstrated a remarkable potential for application as anode materials due to its superior capacity performance and worldwide abundance. However, Si intrinsically undergoes substantial volume fluctuation during repeated lithiation/delithiation processes, which pulverizes the Si particles and undermines the integrity of the electrode structures, thus resulting in frustrating cycling stability. We developed a polymer binder with a highly stretchable and elastic network structure that can accommodate volume variation of Si. This was realized by an in situ crosslinking of polyacrylic acid (PAA) with isocyanate-terminated polyurethane oligomers that consist of polyethylene glycol (PEG) chains and 2-ureido-4-pyrimidinone (UPy) moieties through the reaction between isocyanate and carboxyl during the electrode preparation process. In this binder network, PAA could strongly adhere to the Si particles by forming hydrogen bonding with the surface hydroxyl groups. The PEG chains induce the flexibility of the polymer network, while the UPy moieties endow the polymer network with desirable mech. strength through the formation of reversible and strong quadruple H-bonding cross-linkers. This binder not only can sufficiently accommodate the volume change of Si but can also provide a strong mech. support to effectively sustain the integrity for the Si anode, consequently enhancing cycle stability and rate performance.

ACS Applied Materials & Interfaces published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, HPLC of Formula: 517-23-7.

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

Huang, Ya Nan published the artcileExternal Stress-Free Reversible Multiple Shape Memory Polymers, Computed Properties of 517-23-7, the publication is ACS Applied Materials & Interfaces (2019), 11(34), 31346-31355, database is CAplus and MEDLINE.

The present work is focused on developing external stress-free two-way triple shape memory polymers (SMPs). Accordingly, a series of innovative approaches are proposed for the material design and preparation Polyurethane prepolymers carrying crystalline polytetrahydrofuran (PTMEG) and poly(ε-caprolactone) (PCL) as the switching phases are resp. synthesized in advance and then crosslinked to produce the target material. The stepwise method is believed to be conducive to manipulation of the relative contribution of PCL and PTMEG. Moreover, the chain extender, 2-amino-5-(2-hydroxyethyl)-6-methylpyrimidin-4-ol (UPy), is incorporated to establish hydrogen bonds among the macromols. By straightforward stretching treatment at different temperatures, the hydrogen bond networks are successfully converted into an internal stress provider, which overcomes the challenge of stress relaxation of the melted low melting temperature polymer (i.e., PTMEG) and increases the efficiency of stress transfer. Meanwhile, the contraction force of the switching phases is tuned to match the internal tensile stress. As a result, the internal stress provider can closely collaborate with melting/recrystallization of the crystalline domains, leading to the repeated multiple shape memory effects. The crosslinked polyurethane is thus able to reversibly morph among three shapes and displays its potentials as soft robot and actuator. The strategy reported here has the advantages of easily accessible raw materials, simple reaction, and facile programing/deprograming/reprograming, so that it possesses wide applicability.

ACS Applied Materials & Interfaces published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Computed Properties of 517-23-7.

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

Chen, Hongtai published the artcileNanoporous Zn^II/Tb^III-Organic Frameworks for CO₂ Conversion, Category: esters-buliding-blocks, the publication is ACS Applied Nano Materials (2020), 3(7), 7201-7210, database is CAplus.

Creative assembly of bimetallic [Zn^IITb^III(CO₂)₃(H₂O)] clusters and the desigened bifunctional ligand of H₆TDP engendered one highly robust anionic heterometallic framework {[(CH₃)₂NH₂][Zn^IITb^III(TDP)(H₂O)]·3DMF·3H₂O}_n (NUC-7), which featured two types of nanochannels decorated with d. open metal sites and free oxygen atoms on the wall. To the best our knowledge, NUC-7 represented one novel kind of heterometallic Zn^II/Ln^III-organic 3D honeycomb MOFs with exposed tetra-coordinated Zn^II-metal sites as Lewis acid sites. Subsequent studies indicated that NUC-7 could highly adsorb CO₂ and catalyze the cycloaddition of various epoxides into related carbonates with the help of cocatalyst TBAB under lukewarm conditions of 1 atm and 80°C. Meanwhile, NUC-7 exhibited the effectively selective sensitivity for discriminating Fe³⁺ in aqueous solution by luminescence quenching. It could be inferred that the excellent characteristics including large void volume, high porosity, active open metal sites, and uncoordinated carboxylate oxygen atoms as Lewis acid and base sites rendered NUC-7 one ideal platform for gas reservoir, specific catalyst, and luminescence sensing.

ACS Applied Nano Materials published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Category: esters-buliding-blocks.

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

Chen, Hongtai published the artcileRobust Heterometallic Tb^III/Mn^II-Organic Framework for CO₂/CH₄ Separation and I₂ Adsorption, Safety of Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, the publication is ACS Applied Nano Materials (2020), 3(3), 2680-2686, database is CAplus.

The exquisite combination of heterometallic [Tb^IIIMn^II(CO₂)₃(H₂O)₂] clusters with the hexacarboxylate ligand of H₆TDP generates one water-stable 3D heterometallic Tb^III/Mn^II-organic framework material {[TbMn(HTDP)(H₂O)₂]·5DMF·4H₂O}_n (NUC–3; H₆TDP = 2,4,6-tri(2′,4′-dicarboxyphenyl)pyridine), which consists of functionalized noninterspersed opening nanochannels shaped by six rows of [Tb^IIIMn^II(CO₂)₃(H₂O)₂] clusters. Based on the single-component sorption measurements, activated NUC–3 framework exhibits effective CO₂/CH₄ separation associated with high uptake and moderate adsorption enthalpy of CO₂. Dynamic breakthrough experiments reveal that NUC–3 could be competent for the separation of CO₂/CH₄ (50:50, v:v) mixture Moreover, the kinetic and equilibrium experiments of iodine adsorption indicate that NUC–3 possess excellent adsorption capacity for iodine mols. in cyclohexane solution The excellent structural stability and functional internal surface makes NUC–3 a prospective adsorbent for practical CO₂/CH₄ separation and adsorption elimination of iodine mols., opening up the insight of heterometallic MOFs for pratical application.

ACS Applied Nano Materials published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Safety of Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate.

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

Chen, Hongtai published the artcileNanocage-Based In^III{Tb^III}₂-Organic Framework Featuring Lotus-Shaped Channels for Highly Efficient CO₂ Fixation and I₂ Capture, Application In Synthesis of 1186376-95-3, the publication is ACS Applied Materials & Interfaces (2020), 12(24), 27803-27811, database is CAplus and MEDLINE.

The exquisite combination of independent 3p [In(CO₂)₄] units and 4f [Tb₂(CO₂)₈] clusters in the presence of the designed hexatopic 2,4,6-tri(2,4-dicarboxyphenyl)pyridine ligand engenders one peculiar nanocaged In(III){Tb(III)}₂-organic framework: ({(Me₂NH₂)[InTb₂(HTDP)₂]·3DMF·3H₂O}_n, designated as NUC-5), which features dual types of lotus-shaped channels along the [100] and [110] axes with related node windows of 5.3 × 6.8 and 12.1 × 9.2 Ų, resp. To the best of our knowledge, except several coexisted 3p-4f In/Ln clusters of {In₃Ln}- and {In₃Ln₂}-based metal-organic frameworks (MOFs), NUC-5 is one novel type of In/Ln heterometallic framework. In addition, its topol. was an unprecedented 3D TAYZIC net with a Schlafli symbol of {4.⁴6²}{4.⁵6⁵}₂{4.⁶6.⁸8}. Moreover, activated NUC-5 is proved to be one efficient adsorbent for CO₂ and one recycled cycloaddition catalyst for the transformation of epoxides into related carbonates with high yields under mild conditions. Furthermore, the excellent reversible sorption performance for I₂ in the volatilization phase or in cyclohexane solution with a maximum adsorption capacity of 609.1 mg/g (3.75 iodine mols. per unit cell) makes NUC-5 a promising adsorbent for radioactive products of ¹²⁹I and ¹³¹I in the field of nuclear industry. This study provides one synthetic strategy that the original nature of MOFs could be enhanced by introducing some specific function-prompted inorganic subunits with the aid of predesigned supporting ligands.

ACS Applied Materials & Interfaces published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Application In Synthesis of 1186376-95-3.

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

Li, Xingzhen published the artcileThe structure and performance study of PP random impact resistance copolymer, Product Details of C42H63O3P, the publication is Polymer Bulletin (Heidelberg, Germany), database is CAplus.

Four samples, including homopolymerized PP (PP-1), random impact copolymerized PP (PP-2), random impact copolymerized PP of ethylene-propylene (PP-3), and random impact copolymerized PP of ethylene-propylene-butylene (PP-4), which were prepared by 75 KG Spheripol process pilot plant using ZN104M as catalyst, were adopted to study the structure and performance, i.e., the influence of the different polypropylene mol. chain structures on the crystallization behavior of random impact copolymer polypropylene, and the changes in mech. and optical performance due to the different aggregation structures of random impact copolymer polypropylene, and following results were achieved. Firstly, when ethylene-propylene rubber (EPR) and copolymerization monomers of ethylene and butylene were added in turn, the regularity of PP mol. chains decreased in different degree with the order of PP-1 > PP-2 > PP-3 > PP-4, and which further led to the same pattern for the crystallization peak temperature and the crystallinity. Secondly, half-crystallization time (T_1/2) of the same cooling rate and the crystallization activation energy increased with the addition of EPR, ethylene and butylene. Crystallization activation energies were calculated to be 12.05 kJ mol^-1, 12.09 kJ mol^-1, 12.38 kJ mol^-1 and 12.64 kJ mol^-1 for PP-1, PP-2, PP-3 and PP-4, resp. Last but the most importantly, the addition of EPR, ethylene and butylene would enhance the impact strength, but decrease the transmittance, whereas the haze changed little. Based on the theory between structure and performance, the reason that caused above results were analyzed. This work provided some guidance for the development of high-performance polypropylene used in identical fields.

Polymer Bulletin (Heidelberg, Germany) published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Product Details of C42H63O3P.

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

Wipf, Peter published the artcileSynthesis of anti-inflammatory α- and β-linked acetamido pyranosides as inhibitors of toll-like receptor 4 (TLR4), Formula: C14H19NO8, the publication is Tetrahedron Letters (2015), 56(23), 3097-3100, database is CAplus and MEDLINE.

The low-mol.-weight iso-Pr 2-acetamido-α-glucoside I (R = AcO, R¹ = H; (C34)) inhibits toll-like receptor 4 (TLR4) in enterocytes and macrophages in vitro, and reduces systemic inflammation in mouse models of endotoxemia and necrotizing enterocolitis. The authors used a Cu(II)-mediated solvolysis of anomeric oxazolines and an acid-mediated conversion of β-glucosamine- and β-galactosamine pentaacetates to generate analogs of C34 at the anomeric C and at C(4) of the pyranose ring. These compounds were evaluated for their effect on TLR4-mediated inflammatory signaling in cultured enterocytes and monocytes. Their efficacy was confirmed using a NF-κB-luciferase reporter mouse, thus establishing a structure-activity relationship (SAR) study in this series and identifying the more efficacious iso-Pr 2-acetamido-α-galactoside I (R = H, R¹ = AcO).

Tetrahedron Letters published new progress about 10378-06-0. 10378-06-0 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Chiral,Ester,Inhibitor,Inhibitor, name is (3aR,5R,6R,7R,7aR)-5-(Acetoxymethyl)-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]oxazole-6,7-diyl diacetate, and the molecular formula is C4Br2N2O4S, Formula: C14H19NO8.

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

Mansour, Oula C. published the artcileNew Anthracenedione Derivatives with Improved Biological Activity by Virtue of Stable Drug-DNA Adduct Formation, Product Details of C10H18O4, the publication is Journal of Medicinal Chemistry (2010), 53(19), 6851-6866, database is CAplus and MEDLINE.

Mitoxantrone is an anticancer agent that acts as a topoisomerase II poison, however, it can also be activated by formaldehyde to form DNA adducts. Pixantrone, a 2-aza-anthracenedione with terminal primary amino groups in its side chains, forms formaldehyde-mediated adducts with DNA more efficiently than mitoxantrone. Mol. modeling studies indicated that extension of the “linker” region of anthracenedione side arms would allow the terminal primary amino greater flexibility and thus access to the guanine residues on the opposite DNA strand. New derivatives based on the pixantrone and mitoxantrone backbones were synthesized, and these incorporated primary amino groups as well as extended side chains. The stability of DNA adducts increased with increasing side chain length of the derivatives A mitoxantrone derivative bearing extended side chains (I) formed the most stable adducts with ∼100-fold enhanced stability compared to mitoxantrone. This finding is of great interest because long-lived drug-DNA adducts are expected to perturb DNA-dependent functions at all stages of the cell cycle.

Journal of Medicinal Chemistry published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, Product Details of C10H18O4.

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

Schulz, Stefan published the artcileAn Antiaphrodisiac in Heliconius melpomene Butterflies, Recommanded Product: Isobutyl palmitate, the publication is Journal of Chemical Ecology (2008), 34(1), 82-93, database is CAplus and MEDLINE.

Gilbert (1976) suggested that male-contributed odors of mated females of Heliconius erato could enforce monogamy. The authors investigated the pheromone system of a relative, Heliconius melpomene, using chem. anal., behavioral experiments, and feeding experiments with labeled biosynthetic pheromone precursors. The abdominal scent glands of males contained a complex odor bouquet, consisting of the volatile compound (E)-β-ocimene together with some trace components and a less volatile matrix made up predominately of esters of common C₁₆– and C₁₈-fatty acids with the alcs. ethanol, 2-propanol, 1-butanol, isobutanol, 1-hexanol, and (Z)-3-hexenol. This bouquet is formed during the first days after eclosion, and transferred during copulation to the females. Virgin female scent glands do not contain these compounds The transfer of ocimene and the esters was shown by anal. of butterflies of both sexes before and after copulation. Addnl. proof was obtained by males fed with labeled D–¹³C₆– glucose. They produced ¹³C-labeled ocimene and transferred it to females during copulation. Behavioral tests with ocimene applied to unmated females showed its repellency to males. The esters did not show such activity, but they moderated the evaporation rate of ocimene. The authors’ investigation showed that β-ocimene is an antiaphrodisiac pheromone of H. melpomene.

Journal of Chemical Ecology published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C23H20BN, Recommanded Product: Isobutyl palmitate.

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

Anthony, Paschal Chidera published the artcileSynthesis of some esters of cinnamic acid and evaluation of their in vitro antidiabetic and antioxidant properties, Safety of Methyl 3-phenyl-2-propenoate, the publication is Tropical Journal of Pharmaceutical Research (2022), 21(1), 131-136, database is CAplus.

To synthesize various ester derivatives of cinnamic acid and to evaluate their in vitro antidiabetic and antioxidant properties. Esters of cinnamic acid were synthesized by refluxing the parent compound (cinnamic acid) with different alcs. using concentrated sulfuric acid as a catalyst. Physicochem. analyses (solubility, b.p., refractive index) and spectrophotometric analyses (UV-visible spectroscopy (UV-VIS), Fourier-transform IR spectroscopy (FT-IR) and gas chromatog.-mass spectroscopy (GC-MS)) were carried out on the synthesized products. The antioxidant inhibitory property, uptake of glucose by yeast, and Hb glycosylation of the synthesized products were also evaluated using standard methods. The identities of methylcinnamate, ethylcinnamate, propylcinnamate, 2-propylcinnamate, butylcinnamate and 2-butylcinnamate were confirmed, at m/z ratios of (131,103,77 and M⁺ of162), (131,103,77 and M⁺ of 176), (147,103,77and M⁺ of 190), (147,103,77 and M⁺ of 204), (143, 103, 77 and M⁺ of 190), and finally (147,103,77 and M⁺ of 204) resp. FT-IR results revealed the following important bonds for the synthesized compounds: C=O, C-C, C-O, C=H, C-H and adjacent H. The results for glucose uptake by yeast and of Hb glycosylation test indicate that all the products facilitated the transport and detachment of glucose at varying concentrations, resp. The DPPH scavenging activity of propylcinnamate, 2-butylcinnamate and methylcinnamate with the absorbance of 63.06, 56.85 and 53.06 at 50μg/mL – 250μg/mL, resp., recorded the highest values when compared with the control (ascorbic acid). The results reveal that the six ester derivatives of cinnamic acid exhibit a certain degree of antidiabetic activity by facilitating the uptake of glucose by yeast and reducing glycation of Hb; thus, showing a reasonable level of inhibition against free radicals.

Tropical Journal of Pharmaceutical Research 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, Safety of Methyl 3-phenyl-2-propenoate.

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