Tag: M.W=300-400

Vasanthakumari, R. published the article 《Crystallization behavior of the system poly(L-lactic acid) and pentaerythrityl tetrabromide》. Keywords: crystallization lactic acid polymer; polyester crystallization pentaerythritol bromide.They researched the compound: Pentaerythrityltetrabromide( cas:3229-00-3 ).Recommanded Product: 3229-00-3. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:3229-00-3) here.

Thermal crystallizationin poly(L-lactic acid) (I) [26811-96-1]-C(CH2Br)4 (II) [3229-00-3] mixtures of various compositions was studied by DSC. M.p.-composition phase diagrams showed a simple eutectic containing 46% I at 422 K. SEM of the microstructures after removing II from the eutectic showed that I and II crystallized simultaneously in such a way that II rods were the leading phases.

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Jin, Biao; Wang, Yanming; Jin, Chuanhong; De Yoreo, James J.; Tang, Ruikang published an article about the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4,SMILESS:Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+] ).Synthetic Route of AuCl4H7O3. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:16961-25-4) through the article.

Understanding the formation mechanism of nanocrystals in solution is fundamental to the development of materials science. For a metal nanocrystal, the cluster-mediated formation mechanism is still poorly understood. In particular, identifying what types of clusters are dominant and how they evolve into a nanocrystal in the early nucleation stage remains a great challenge. Here, using liquid-cell transmission electron microscopy, we directly observe the formation of ultrasmall Au clusters (∼ 0.84 nm) in the presence of PAA-Na. These clusters, which correspond to the size of the Au13 cluster, coalesce to form nanocrystals. Our mol. dynamics simulations suggest that Au13 in an aqueous environment has greater stability when compared to other cluster sizes and provide atomistic details of growth by cluster coalescence. Collectively, our demonstration of Au13 as the dominant species with an elaboration of their coalescence kinetics sheds light on nonclassical nanocrystal formation mechanisms and offers useful guidelines for designing innovative pathways for the synthesis of nanomaterials.

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Related Products of 16961-25-4. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Tuning stable noble metal nanoparticles dispersions to moderate their interaction with model membranes. Author is William, Nicola; Bamidoro, Faith; Beales, Paul A.; Drummond-Brydson, Rik; Hondow, Nicole; Key, Sarah; Kulak, Alexander; Walsh, Aidan Charles; Winter, Sophia; Nelson, Laurence Andrew.

The properties of stable gold (Au) nanoparticle dispersions can be tuned to alter their activity towards biomembrane models. Au nanoparticle coating techniques together with rapid electrochem. screens of a phospholipid layer on fabricated mercury (Hg) on platinum (Pt) electrode have been used to moderate the phospholipid layer activity of Au nanoparticle dispersions. Screening results for Au nanoparticle dispersions were intercalibrated with phospholipid large unilamellar vesicle (LUV) interactions using a carboxyfluorescein (CF) leakage assay. All nanoparticle dispersions were characterised for size, by dynamic light scattering (DLS) and transmission electron microscopy (TEM). Com. and high quality home synthesized Au nanoparticle dispersions are phospholipid monolayer active whereas Ag nanoparticle dispersions are not. If Au nanoparticles are coated with a thin layer of Ag then the particle/lipid interaction is suppressed. The electrochem. assays of the lipid layer activity of Au nanoparticle dispersions align with LUV leakage assays of the same. Au nanoparticles of decreasing size and increasing dispersion concentration showed a stronger phospholipid monolayer/bilayer interaction. Treating Au nanoparticles with cell culture medium and incubation of Au nanoparticle dispersions in phosphate buffered saline (PBS) solutions removes their phospholipid layer interaction.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Strong interaction between Au nanoparticles and porous polyurethane sponge enables efficient environmental catalysis with high reusability.Related Products of 16961-25-4.

A novel and recoverable platform of polyurethane (PU) sponge-supported Au nanoparticle catalyst was obtained by a water-based in-situ preparation process. The structure, chem., and morphol. properties of this platform were characterized by XRD, TGA, SEM, FT-IR, and XPS. The Au/PU sponge platform exhibited excellent catalytic performances in catalytic reductions of p-nitrophenol and o-nitroaniline at room temperature, and both catalytic reactions could be completed within 4.5 and 1.5 min, resp. Furthermore, the strong interaction between Au nanoparticles and the PU sponge enabled the catalyst system to maintain a high catalytic efficiency after 5 recycling times, since the PU sponge reduced the trend of leaching and aggregation of Au nanoparticles. The unique nature of Au nanoparticles and the porous PU sponge along with their strong interaction resulted in a highly efficient, recoverable, and cost-effective multifunctional catalyst. The AuNP/Sponge nanocatalyst platform has great potential for wide environmental and other catalytic applications.

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Imidazole – Wikipedia,
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Safety of Hydrogen tetrachloroaurate(III) trihydrate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Size-Controlled Formation of Polymer Janus Discs. Author is Qiang, Xiaolian; Franzka, Steffen; Quintieri, Giada; Dai, Xuezhi; Wong, Chin Ken; Groschel, Andre H..

A straightforward method is presented for the preparation of nano- to micrometer-sized Janus disks with controlled shape, size, and aspect ratio. The method relies on cross-linkable ABC triblock terpolymers and involves first the preparation of prolate ellipsoidal microparticles by combining Shirasu porous glass (SPG) membrane emulsification with evaporation-induced confinement assembly (EICA). By varying the pore diameter of the SPG membrane, we produce Janus disks with controlled size distributions centered around hundreds of nanometers to several microns. We further transferred the disks to water by mild sulfonation of PS to polystyrene sulfonic acid (PSS) and verified the Janus character by subsequent labeling with cationic nanoparticles. Finally, we show that the sulfonated Janus disks are amphiphilic and can be used as efficient colloidal stabilizers for oil-in-water (O/W) emulsions.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called A cadmium coordination polymer with anatase topology constructed from a tetrapodal ligand. Synthesis, crystal structures and luminescence, published in 2011-02-28, which mentions a compound: 3229-00-3, Name is Pentaerythrityltetrabromide, Molecular C5H8Br4, Recommanded Product: 3229-00-3.

A tetrapodal ligand, tetrakis(3-carboxyphenoxymethyl)methane (H4L), and its Cd complex [Cd2L(H2O)4]n (1) were synthesized and structurally characterized. Crystal data: monoclinic, a = 27.521(6), b = 8.4410(9), c = 18.710(8) Å, β = 123.449(5)°, Z = 4, R1 = 0.0545, wR2 = 0.1348 [I > 2σ(I)]. Complex 1 displays a 3D (3,6)-connected anatase topol. with the Schlaefli symbol (42.6)2(44.62.88.10). At room temperature, 1 exhibits a strong emission at 396 nm upon excitation at 320 nm.

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Imidazole – Wikipedia,
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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Macromolecules (Washington, DC, United States) called Convenient Synthesis of Functional Polyfluorenes via a Modified One-Pot Suzuki-Miyaura Condensation Reaction, Author is Walczak, Ryan M.; Brookins, Robert N.; Savage, Alice M.; van der Aa, Eveline M.; Reynolds, John R., which mentions a compound: 58656-04-5, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4P, Related Products of 58656-04-5.

We utilizethe Suzuki-Miyaura reaction in order to develop an effective one-pot polymerization to prepare functonalized polyfluorenes. Critical control of reaction conditions provided high yields and polymers with d.p. on the order of 60-70.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 16961-25-4, is researched, SMILESS is Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+], Molecular AuCl4H7O3Journal, International Journal of Biosciences called Brown seaweed Sargassum polycystum (C. Agardh) extract as mediator in the green synthesis of colloidal gold nanoparticles from Malita, Davao Occidental Philippines, Author is Lumogdang, Leonel; Teves, Franco, the main research direction is brown seaweed Sargassum polycystum gold nanoparticle green synthesis.Recommanded Product: Hydrogen tetrachloroaurate(III) trihydrate.

One of the paradigm shifts in the field of nanotechnol. is the development of environmentally friendly, biocompatibility and green approaches in the synthesis of metal nanoparticles. In this study, the extracts of Brown seaweed, Sargassum polycystum (C.Agardh) were utilized as reducing agents in the green synthesis of gold nanoparticles. The produced gold nanoparticles were characterized using UV-visible spectroscopy, Fourier Transform IR (FTIR) spectroscopy, SEM (SEM) and Energy dispersive X-ray (EDS) spectroscopy. The different volumes of brown seaweed extract namely 25, 20, 15, 10 and 5ml when added with Tetrachloroauric acid gradually changed from color brown to ruby red, a characteristics reaction of gold nanoparticles. UV-vis spectral anal. of the gold nanoparticles showed strong peaks around 526nm to 548nm, an optical characteristic of gold nanoparticles. The presence of elemental gold was also confirmed by the EDS anal. The SEM image of the gold nanoparticles clusters of spherical morphol. with a size range of 68.5 to 240nm. The FTIR spectra of the brown seaweed mediated synthesized gold nanoparticles showed strong peaks corresponding to hydroxyl groups, and primary amines functionalities which probably acted as reducing agent, stabilizing agent and capping agent during the synthesis of gold nanoparticles.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Wang, Xiaojie; Xu, Dan; Jaquet, Bea; Yang, Yang; Wang, Jiaxiu; Huang, Heqin; Chen, Ye; Gerhard, Christoph; Zhang, Kai published the article 《Structural Colors by Synergistic Birefringence and Surface Plasmon Resonance》. Keywords: structural color synergistic birefringence surface plasmon resonance; birefringence; cellulose nanocrystals (CNCs); gold nanorods (GNRs); structural colors; surface plasmon resonance (SPR).They researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).Computed Properties of AuCl4H7O3. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:16961-25-4) here.

One-dimensional nanomaterials including cellulose nanocrystals (CNCs) and gold nanorods (GNRs) are widely used in optical materials due to their resp. inherent features: birefringence with accompanying light retardation and surface plasmon resonance (SPR). Herein, we successfully combine these properties of both nanorods to generate synergistic and readily tunable structural colors in hybrid composite polymer films. CNCs and GNRs are embedded either in the same or in sep. films after unidirectional alignment in dynamic hydrogels. By synergistically leveraging CNCs and GNRs with diverse amounts in hybrid films or stacked sep. films, wide-ranging structural colors are obtained, far beyond those from films solely with aligned CNCs or GNRs. Higher GNR contents enhance light absorption at 520 nm with promoted magenta colors, while more CNCs affect the overall phase retardation with light absorption between 400 and 700 nm between crossed polarizers. Moreover, adjusting the angles between films solely with CNCs or GNRs via a stacking/rotating technique successively manipulates colors with flexible film combinations. By rotating the films with aligned GNRs (0-180°), light absorption can traverse from ~500 to 650 nm. Thus, tuning the adjustable synergism of birefringence of CNCs and SPR of GNRs provides great potential for structural colors, which enlightens inspirations for designing functional optical materials.

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Imidazole – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Targeting pancreatic cancer cells and stellate cells using designer nanotherapeutics in vitro, the main research direction is cetuximab gemcitabine gold nanoparticle pancreatic cancer stellate cell nanotherapeutics; PEGylation; drug delivery; gold nanoparticles; pancreatic cancer.Recommanded Product: 16961-25-4.

Pancreatic cancer (PC) is characterized by a robust desmoplastic environment, which limits the uptake of the standard first-line chemotherapeutic drug gemcitabine. Enhancing gemcitabine delivery to the complex tumor microenvironment (TME) is a major clin. challenge. Mol. crosstalk between pancreatic cancer cells (PCCs) and pancreatic stellate cells (PSCs) plays a critical role in desmoplastic reaction in PCs. Herein, we report the development of a targeted drug delivery system to inhibit the proliferation of PCCs and PSCs in vitro. Using gold nanoparticles as the delivery vehicle, the anti-EGFR antibody cetuximab (C225/C) as a targeting agent, gemcitabine as drug and polyethylene glycol (PEG) as a stealth mol., we created a series of targeted drug delivery systems. Fabricated nanoconjugates were characterized by various physicochem. techniques such as UV-Visible spectroscopy, transmission electron microscopy, HPLC and instrumental neutron activation anal. (INAA). Targeted gemcitabine delivery systems containing mPEG-SH having mol. weights of 550 Da or 1000 Da demonstrated superior efficacy in reducing the viability of both PCCs and PSCs as compared to their non-targeted counterparts. EGFR-targeted pathway was further validated by pre-treating cells with C225 followed by determining cellular viability. Taken together, in our current study we have developed a PEGylated targeted nanoconjugate ACG44P1000 that showed enhanced selectivity towards pancreatic cancer cells and pancreatic stellate cells, among others, for gemcitabine delivery. We will investigate the ability of these optimized conjugates to inhibit desmoplasia and tumor growth in vivo in our future studies.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem