Tag: 300-400

Xiong, Chenghe; Feng, Shaojie; Qiao, Yin; Guo, Zhongwu; Gu, Guofeng published an article in 2018, the title of the article was Synthesis and Immunological Studies of Oligosaccharides that Consist of the Repeating Unit of Streptococcus pneumoniae Serotype 3 Capsular Polysaccharide.Synthetic Route of 79642-50-5 And the article contains the following content:

A highly convergent and efficient strategy was developed for the chem. synthesis of complex oligosaccharides of Streptococcus pneumoniae type 3 capsular polysaccharides that contain multiple glucuronic acid units. Once the oligo-glucosides were efficiently and stereoselectively assembled, the designated glucose units were regioselectively oxidized to glucuronic acid in one step at the final synthetic stage, which helped avoid difficult glycosylation that involved glucuronic acid. The target oligosaccharides had a free amino group at the reducing terminus and varied caps at the non-reducing terminus to enable further modification and structure-activity relationship studies. Immunol. evaluations of the oligosaccharide-tetanus toxoid conjugates showed that they elicited robust T-cell-dependent IgG antibody responses and that the sugar chain length had a major impact on their immunol. properties. In particular, the penta- and hexasaccharides were identified as promising antigens for vaccine development. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Synthetic Route of 79642-50-5

The Article related to bovine serum albumin tetanus toxoid glucuronic acid oligosaccharide preparation, structure activity igg antibody glycosylation glucuronic acid oligosaccharide, igg antibody vaccine tetanus toxoid glycosylation glucuronic acid oligosaccharide, oligosaccharide preparation immunol repeating unit streptococcus pneumoniae polysaccharide and other aspects.Synthetic Route of 79642-50-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Schaate, Andreas; Roy, Pascal; Godt, Adelheid; Lippke, Jann; Waltz, Florian; Wiebcke, Michael; Behrens, Peter published an article in 2011, the title of the article was Modulated Synthesis of Zr-Based Metal-Organic Frameworks: From Nano to Single Crystals.SDS of cas: 1312703-30-2 And the article contains the following content:

The authors present a study on the influence of benzoic acid, acetic acid, and water on the syntheses of the Zr-based metal-organic frameworks Zr-bdc (UiO-66), Zr-bdc-NH2 (UiO-66-NH2), Zr-bpdc (UiO-67), and Zr-tpdc-NH2 (UiO-68-NH2) (H2bdc: terephthalic acid, H2bpdc: biphenyl-4,4′-dicarboxylic acid, H2tpdc: terphenyl-4,4”-dicarboxylic acid). By varying the amount of benzoic or acetic acid, the synthesis of Zr-bdc can be modulated. With increasing concentration of the modulator, the products change from intergrown to individual crystals, the size of which can be tuned. Addition of benzoic acid also affects the size and morphol. of Zr-bpdc and, addnl., makes the synthesis of Zr-bpdc highly reproducible. The control of crystal and particle size is proven by powder XRD, SEM and dynamic light scattering (DLS) measurements. TGA and Ar sorption experiments show that the materials from modulated syntheses can be activated and that they exhibit high sp. surface areas. Water proved to be essential for the formation of well-ordered Zr-bdc-NH2. Zr-tpdc-NH2, a material with a structure analogous to that of Zr-bdc and Zr-bpdc, but with the longer, functionalized linker 2′-amino-1,1′:4′,1”-terphenyl-4,4”-dicarboxylic acid, was obtained as single crystals. This allowed the 1st single-crystal structural anal. of a Zr-based metal-organic framework. The experimental process involved the reaction of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate(cas: 1312703-30-2).SDS of cas: 1312703-30-2

The Article related to zirconium terephthalate aminoterephthalate biphenyldicarboxylate aminoterphenyldicarboxylate mof preparation structure morphol, surface property zirconium terephthalate aminoterephthalate biphenyldicarboxylate aminoterphenyldicarboxylate mof, crystal structure zirconium aminoterphenyldicarboxylate oxo hydroxo mof complex and other aspects.SDS of cas: 1312703-30-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Roy, Arundhati; Saha, Debasis; Mandal, Prashant Sahebrao; Mukherjee, Arnab; Talukdar, Pinaki published an article in 2017, the title of the article was pH-Gated Chloride Transport by a Triazine-Based Tripodal Semicage.Related Products of 227940-70-7 And the article contains the following content:

Tris(diazabicyclo[3.3.1]octyl)triazines I (R = PhCH2, C6F5CH2, H) were prepared as ion transporters. The cation and anion transporting selectivities of I were determined; I (R = PhCH2, C6F5CH2) acted as efficient transmembrane Cl- carriers, while I (R = H) was too polar to effectively transport ions through membranes. I (R = PhCH2, C6F5CH2) functioned as mobile carriers for Cl- via an antiport exchange mechanism. Mol. dynamic simulations with I (R = PhCH2) show a strong Cl- binding within the cavity by direct and water-mediated hydrogen bonding. The structures of I were determined by X-ray crystallog. The experimental process involved the reaction of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-70-7).Related Products of 227940-70-7

The Article related to trisdiazabicyclononyltriazine preparation ion transporter, acid dependence anion cation selectivity transmembrane transport trisdiazabicyclononyltriazine, chloride selectivity transmembrane transport trisdiazabicyclononyltriazine, mol dynamics crystal structure trisdiazabicyclononyltriazine, antiport mechanism, chloride selectivity, preorganization and other aspects.Related Products of 227940-70-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On October 1, 2017, Bulygina, Ludmila A.; Kagramanov, Nikolay D.; Khrushcheva, Natalya S.; Lyssenko, Konstantin A.; Peregudov, Aleksander S.; Sokolov, Viacheslav I. published an article.Application of 227940-70-7 The title of the article was Unsymmetrical pincer CNN palladium complex of 7-ferrocenylmethyl-3-methyl-3,7-diazabicyclo[3.3.1]nonane. And the article contained the following:

The new unsym. ferrocenyl containing bispidine derivative 7 was synthesized as a ligand precursor in five steps starting from N-Boc-4-oxopiperidine. The corresponding palladium CNN pincer complex 8 was prepared by direct cyclopalladation of the ligand 7 with Li2PdCl4 in MeOH. The mol. structure of the obtained palladacycle was determined by multinuclear NMR (1H, 13C, 15N) and confirmed by x-ray diffraction anal. The pincer complex 8 demonstrated high catalytic activity in some cross-coupling reactions of aryl halides with phenylboronic acid, norbornene and Et acrylate. The experimental process involved the reaction of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-70-7).Application of 227940-70-7

The Article related to unsym pincer cnn palladium ferrocenylmethyldiazabicyclononane cyclometalated preparation crystal structure, crystal mol structure ferrocenylmethyldiazabicyclononane palladium cyclometalated complex, cross coupling heck hydroarylation norbornene ethyl acrylate catalyst preparation, suzuki coupling phenylboronic acid aryl halide catalyst preparation and other aspects.Application of 227940-70-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Quality Control of 4-n-Pentylphenyl-4-pentylbenzoateOn September 30, 2004 ,《Separation of biphenyl nitrile compounds by microemulsion electrokinetic chromatography with mixed surfactants》 was published in Chinese Chemical Letters. The article was written by Gong, Su Xuan; Bo, Tao; Huang, Lan; Li, Ke An; Liu, Hu Wei. The article contains the following contents:

A mixture of nine biphenyl nitrile compounds with high hydrophobicity and similar structures was successfully separated by microemulsion electrokinetic chromatog. (MEEKC) within 30 min. The buffer system contained 100 mmol/L sodium dodecyl sulfate (SDS), 80 mmol/L sodium cholate (SC), 0.81% heptane, 7.5% n-butanol, 10% acetonitrile and 10 mmol/L borate. The addition of SC, organic modifiers, sample preparation and temperature all showed remarkable effect on the separation Meanwhile, the MEEKC method was briefly compared with micellar electrokinetic chromatog. (MEKC) method. After reading the article, we found that the author used 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate Polyesters are important plastics, with monomers linked by ester moieties.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

《Effect of external electrical field on phase behavior and morphology development of polymer dispersed liquid crystal》 was written by Yang, Dianzhi; Lin, Jiaping; Li, Tao; Lin, Shaoliang; Tian, Xiaohui. Recommanded Product: 74305-48-9 And the article was included in European Polymer Journal on August 31 ,2004. The article conveys some information:

Phase diagrams for mixtures of liquid crystal (LC)/monomer with and without an external elec. field applied have been established using polarized light microscope (PLM). The (isotropic + nematic) coexistent phase region and (isotropic + isotropic) phase boundary of LC/monomer mixtures were observed to shift upward to higher temperatures when the external elec. field exists. The elec. field applied during the crosslinking polymerization has a significant influence on the phase diagrams for the LC/polymer(E 51) mixtures by rendering the coexistent phase regions shift upward to higher temperatures The influence of the external elec. field on the processes of the isotropic-isotropic phase separation and liquid crystal ordering in PDLC formation has also been investigated. Both the processes could be highly accelerated by the elec. field. In the experiment, the researchers used many compounds, for example, 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Recommanded Product: 74305-48-9)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. Esters are more polar than ethers but less polar than alcohols. Recommanded Product: 74305-48-9 They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Gong, Suxuan; Liu, Fujia; Li, Wei; Gao, Fei; Gao, Chunjin; Liao, Yiping; Liu, Huwei published an article in Journal of Chromatography A. The title of the article was 《Separation of hydrophobic solutes by organic-solvent-based micellar electrokinetic chromatography using cation surfactants》.Computed Properties of C23H30O2 The author mentioned the following in the article:

The separation of 13 homologous stick-like hydrophobic solutes, i.e., biphenyl nitrile derivatives, by organic-solvent-based micellar electrokinetic chromatog. (MEKC) was studied in terms of separation medium composition, species and concentration of surfactant, other additives, separation voltage and temperature The 13 strong hydrophobic compounds were baseline separated in 25 min with a repeatability of <1.3% (relative standard deviation) for migration time. The separation medium was a mixture of methanol, 2-propanol and water (58.5:10:31.5), containing 150 mM cetyltrimethylammonium bromide (CTAB) and 20 mM sodium borate. Variety of solvent composition, temperature and applied voltage all showed remarkable effect on the separation The organic-solvent-based MEKC method proved to be superior to the aqueous MEKC and microemulsion electrokinetic chromatog. (MEEKC) methods for the separation of strongly hydrophobic compounds The experimental process involved the reaction of 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Computed Properties of C23H30O2)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Computed Properties of C23H30O2 They perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Frunza, Ligia; Zgura, Irina; Ganea, Constantin Paul; Schonhals, Andreas published their research in Journal of Molecular Liquids on August 1 ,2022. The article was titled 《Molecular dynamics of alkyl benzoate liquid crystals in the bulk state and in the surface layer of their composites with oxide nanopowders》.SDS of cas: 74305-48-9 The article contains the following contents:

This paper presents the results concerning monotropic nematic liquid crystals 4-pentylphenyl 4′-alkyl benzoate (5PnB) (n = 3 or 5 carbon atoms in the alkyl chain). Their mesophase properties were supported by images of the polarized optical microscopy. Mol. dynamics in the bulk samples or in the composites prepared with aerosil A380 was investigated by broadband dielec. spectroscopy in a large temperature range, appropriately chosen. Thermo gravimetric and IR investigations were addnl. performed. The data were compared with those of structurally related nematics like cyanophenyl pentyl benzoates, which have a cyan group instead of the pentyl chain. The dielec. spectra of the bulk 3P5B and 5P5B demonstrate a dielec. behavior with several relaxation processes as expected for nematic liquid crystals. The temperature dependence of the relaxation rates (and of the dielec. strength) seems to have two distinguished regimes. Thus, in the isotropic state, at higher temperatures the data obey the Vogel-Fulcher-Tammann law, whereas an Arrhenius law is fitted at lower temperature, in a close similarity to the behavior of a constrained dynamic glass transition. Samples with a high d. of silica (larger than 7 g aerosil/1 g of 5PnB) were prepared to observe a thin layer adsorbed on the particle surface, it was estimated that almost each guest 5PnB mol. interacts with the aerosil surface. For the composites only one main relaxation process is observed at frequencies much lower than those for the corresponding bulk, which was assigned to the dynamics of the mols. in the surface layer. IR spectroscopy shows that these mols. interact with the surface by the ester carbonyl group leading to the monolayer self-assembly at liquid-solid interface. We note once more the importance of the functional unit(s) for the interaction with the hydroxyl groups on the aerosil surface. In the experiment, the researchers used 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9SDS of cas: 74305-48-9)

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. Esters are more polar than ethers but less polar than alcohols. SDS of cas: 74305-48-9 They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

COA of Formula: C19H28N2O2On September 30, 2022 ,《Ratiometric Recognition of Protons by a Multiple Tagged Designer Fluorescent Chemosensor》 was published in Journal of Fluorescence. The article was written by Khokhar, Vaishali; Singh, Hanuman; Haridas, V.; Pandey, Siddharth. The article contains the following contents:

Mol. architecture with different fluorophoric units can offer improved and effective recognition of biol. important analytes. We present here a new strategy for the design of ratiometric chemosensors that operate by photoinduced electron transfer (PET). This ratiometric sensor endowed with tryptophan and anthracene exhibits high sensitivity, excellent selectivity and remarkable reversibility towards recognition of H+ in methanol. This “”Turn-On”” type behavior is crafted into the mol. by incorporation of bispidine entity. Effective quenching of the fluorescence of the anthracene by the adjacent amine groups of the bispidine results in negligible fluorescence from the anthracene group leading to highly sensitive recognition of protons by the compound as H+ protonate the amine functionalities giving rise to the emergence of the fluorescence from the anthracene group. This, combined with the reduction in the fluorescence from the Trp group by H+, results in highly sensitive ratiometric nature of the response especially at low [H+]. After reading the article, we found that the author used tert-Butyl 7-benzyl-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-71-8COA of Formula: C19H28N2O2)

tert-Butyl 7-benzyl-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-71-8) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.COA of Formula: C19H28N2O2 They perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Bradshaw, M. J.; Raynes, E. P.; Fedak, I.; Leadbetter, A. J. published an article on January 31 ,1984. The article was titled 《A correlation between short range smectic-like ordering and the elastic constants of nematic liquid crystals》, and you may find the article in Journal de Physique (Paris).Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate The information in the text is summarized as follows:

The measurements of the bend (k33) and splay (k11) elastic constants and the amplitude of the smectic-like local ordering (obtained using x-ray diffraction techniques), were made for a wide range of nematogens. The results reveal a strong correlation between k33/k11 and the strength of the smectic-like local ordering. This correlation applies to nematogens with either bilayer or monolayer structures, irresp. of whether or not they exhibit a smectic phase. These results have been rationalized in more detail in terms of a recent theor. model which calculated the elastic constants as a function of smectic-like local ordering. In addition to this study using 4-n-Pentylphenyl-4-pentylbenzoate, there are many other studies that have used 4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate) was used in this study.

4-n-Pentylphenyl-4-pentylbenzoate(cas: 74305-48-9) belongs to esters. They are important in biology, being one of the main classes of lipids and comprising the bulk of animal fats and vegetable oils.Quality Control of 4-n-Pentylphenyl-4-pentylbenzoate They perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics