Tag: M.W=300-400

Related Products of 58656-04-5. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Modular Establishment of a Diketopyrrolopyrrole-Based Polymer Library via Pd-Catalyzed Direct C-H (Hetero)arylation: a Highly Efficient Approach to Discover Low-Bandgap Polymers. Author is Guo, Qiang; Dong, Jiaxing; Wan, Danyang; Wu, Di; You, Jingsong.

A concise, highly efficient palladium-catalyzed direct C-H (hetero)arylation is developed to modularly assemble a diketopyrrolopyrrole (DTDPP)-based polymer library to screen low-bandgap and near-IR (NIR) absorbing materials. The copolymers of 2,5-bis(2-octyldodecyl)-3,6-bis(thieny-2-yl)pyrrolo[3,4-c]pyrrole-1,4-dione (I) with 4,7-dibromo-2,1,3-benzothiadiazole (II) or 5,8-dibromoquinoxaline (III) having an alternating donor-acceptor-donor-acceptor (D-A-D-A) sequence and the 2,5-bis(2-octyldodecyl)-3,6-bis(5-bromothieny-2-yl)pyrrolo[3,4-c]pyrrole-1,4-dione homopolymer (IV) exhibit planarity and excellent π-conjugation, which lead to low bandgaps (down to 1.22 eV) as well as strong and broad NIR absorption bands (up to 1000 nm). The copolymers of I with 2,7-dibromo-N-(2-octyldodecyl)carbazole (V), 3,6-dibromo-N-octylcarbazole, 2,7-dibromo-9,9-dioctylfluorene (VI), 4,4′-dibromostilbene, 4,4′-dibromo-1,1′-biphenyl, 1,4-dibromo-2,5-dioctyloxybenzene (VII), 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-dioctylfluorene, or 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(2-octyldodecyl)carbazole showed a highly distorted conformation. The HOMO and LUMO were delocalized over the entire conjugated backbones of I-II copolymer, I-III copolymer, and IV in comparison with localized lobes mainly on the acceptor units of the backbones of I-V, I-VI, and I-VII copolymers.

From this literature《Modular Establishment of a Diketopyrrolopyrrole-Based Polymer Library via Pd-Catalyzed Direct C-H (Hetero)arylation: a Highly Efficient Approach to Discover Low-Bandgap Polymers》,we know some information about this compound(58656-04-5)Related Products of 58656-04-5, but this is not all information, there are many literatures related to this compound(58656-04-5).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Heat capacities and thermodynamic properties of globular molecules. XIII. Transition and fusion of pentaerythrityl chloride and bromide, transition of pentaerythrityl iodide》. Authors are Clever, H. Lawrence; Wong, Wen-Kuei; Westrum, Edgar F. Jr..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Reference of Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

cf. CA 61, 6467h. The heat capacities of crystalline pentaerythrityl iodide and of crystalline and liquid pentaerythrityl chloride and bromide above 290°K. were determined by adiabatic calorimetry. The high entropies of fusion, 14.45 and 15.42 cal./mole degree found for pentaerythrityl chloride and bromide, resp., indicate that these halides have no plastic crystal phase at atm. pressure. At temperatures corresponding to the same fraction of their resp. m.ps. all 3 compounds show broad λ-anomalies in their heat capacity curves. These involve excess entropies of <1 cal./mole degree. From this literature《Heat capacities and thermodynamic properties of globular molecules. XIII. Transition and fusion of pentaerythrityl chloride and bromide, transition of pentaerythrityl iodide》,we know some information about this compound(3229-00-3)Reference of Pentaerythrityltetrabromide, but this is not all information, there are many literatures related to this compound(3229-00-3).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

COA of Formula: AuCl4H7O3. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about An ultrasound activated vesicle of Janus Au-MnO nanoparticles for promoted tumor penetration and sono-chemodynamic therapy of orthotopic liver cancer. Author is Lin, Xiahui; Liu, Shuya; Zhang, Xuan; Zhu, Rong; Chen, Shan; Chen, Xiaoyuan; Song, Jibin; Yang, Huanghao.

Sonodynamic therapy (SDT) has the advantages of high penetration, non-invasiveness, and controllability, and it is suitable for deep-seated tumors. However, there is still a lack of effective sonosensitizers with high sensitivity, safety, and penetration. Now, ultrasound (US) and glutathione (GSH) dual responsive vesicles of Janus Au-MnO nanoparticles (JNPs) were coated with PEG and a ROS-sensitive polymer. Upon US irradiation, the vesicles were disassembled into small Janus Au-MnO nanoparticles (NPs) with promoted penetration ability. Subsequently, GSH-triggered MnO degradation simultaneously released smaller Au NPs as numerous cavitation nucleation sites and Mn2+ for chemodynamic therapy (CDT), resulting in enhanced reactive oxygen species (ROS) generation. This also allowed dual-modality photoacoustic imaging in the second near-IR (NIR) window and T1-MR imaging due to the released Mn2+, and inhibited orthotopic liver tumor growth via synergistic SDT/CDT.

From this literature《An ultrasound activated vesicle of Janus Au-MnO nanoparticles for promoted tumor penetration and sono-chemodynamic therapy of orthotopic liver cancer》,we know some information about this compound(16961-25-4)COA of Formula: AuCl4H7O3, but this is not all information, there are many literatures related to this compound(16961-25-4).

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: 58656-04-5, is researched, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4PJournal, Article, Research Support, Non-U.S. Gov’t, Chemistry – A European Journal called Synthesis of 2,5-Diaryl Substituted Thiophenes as Helical Mimetics: Towards the Modulation of Islet Amyloid Polypeptide (IAPP) Amyloid Fibril Formation and Cytotoxicity, Author is Hassanpour, Avid; De Carufel, Carole Anne; Bourgault, Steve; Forgione, Pat, the main research direction is diarylthiophene preparation modulation islet amyloid polypeptide amyloid fibril formation; thiophene diaryl preparation helix mimetic; CH arylation; amyloids; decarboxylative arylation; peptidomimetics; thiophenes.Electric Literature of C18H34BF4P.

A range of 2,5-diarylated thiophenes were synthesized as small mol. mimetics of the α-helix to modulate the amyloidogenesis and cytotoxic effect of islet amyloid polypeptide (IAPP). 3-Substituted thiophene-2-carboxylic acids were used as key intermediates and functionalized by palladium decarboxylative cross-coupling and direct C-H activation successively with overall yields ranging from 23 to 95 %. The effect of the ligands on IAPP amyloid fibril formation was evaluated with the thioflavin T (ThT) fluorescence-based assay. Furthermore, the capacity of these compounds to inhibit the cytotoxic effect of IAPP was assessed using β-pancreatic cells.

From this literature《Synthesis of 2,5-Diaryl Substituted Thiophenes as Helical Mimetics: Towards the Modulation of Islet Amyloid Polypeptide (IAPP) Amyloid Fibril Formation and Cytotoxicity》,we know some information about this compound(58656-04-5)Electric Literature of C18H34BF4P, but this is not all information, there are many literatures related to this compound(58656-04-5).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ) is researched.COA of Formula: AuCl4H7O3.Boruah, Bijoy Sankar; Biswas, Rajib; Baishya, Upasana published the article 《Ultrasensitive Trace Determination of Cadmium Through a Green Synthesized Hybrid PVA-Chitosan Nanocomposite》 about this compound( cas:16961-25-4 ) in Plasmonics. Keywords: cadmium polyvinyl alc chitosan nanocomposite ultrasensitive trace determination. Let’s learn more about this compound (cas:16961-25-4).

Abstract: This work describes an ultrasensitive trace determination of cadmium ion in aqueous medium through hybrid nanocomposite. Biodegradable materials such as chitosan and PVA are used to functionalize gold nanoparticles and to form a hybrid nanocomposite. Optical fiber is used to make sensor probe. To reduce toxicity of the gold nanoparticles towards environment, we adopt a green way to synthesize gold nanoparticles. In the optical set up, we have used white LED as light source and optical detector to record output response. From exptl. results, we have found that this sensor probe has selectivity towards cadmium. It is found that sensitivity of this probe is ∼ 0.028 intensity/ppb. From the linear fit, regression value is found to be ∼ 0.99. This sensor probe has offered a limit of detection 800 ppt, which is below the WHO and EPA permissible limit 5 ppb.

From this literature《Ultrasensitive Trace Determination of Cadmium Through a Green Synthesized Hybrid PVA-Chitosan Nanocomposite》,we know some information about this compound(16961-25-4)COA of Formula: AuCl4H7O3, but this is not all information, there are many literatures related to this compound(16961-25-4).

Reference:
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 The catalytic addition of alkyl boranes to alkynyl esters affording single-isomer trisubstituted olefins, published in 2011-05-12, which mentions a compound: 58656-04-5, Name is Tricyclohexylphosphonium tetrafluoroborate, Molecular C18H34BF4P, Formula: C18H34BF4P.

The generation of a series of trisubstituted olefins bearing alkyl substituents was described using a stereo- and regioselective addition to alkynyl esters. The method produces trisubstituted olefins as single isomers using a convenient and mild transformation in which alkyl boranes are cross-coupled with alkynyl esters and amides using Pd catalysis.

From this literature《The catalytic addition of alkyl boranes to alkynyl esters affording single-isomer trisubstituted olefins》,we know some information about this compound(58656-04-5)Formula: C18H34BF4P, but this is not all information, there are many literatures related to this compound(58656-04-5).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 3229-00-3, is researched, Molecular C5H8Br4, about Comparison of the conformation of 3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] in the solid state and in solution, the main research direction is spirobibenzodioxepindicarboxylate configuration conformation; CD spirobibenzodioxepindicarboxylate.Synthetic Route of C5H8Br4.

The spiro-coplanar conformation of 6,6′-bis(methoxycarbonyl)-3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] (I, R = Me) and the 3P configuration of I [R = (1R,3R,4S)-menthyl] have been determined from chiroptical data by application of the exciton theory. The solid-state conformation of the central part of the menthol ester mol. is spiro-coplanar too, with nearly D2 symmetry. The menthol moieties have chair conformations, and the absolute configurations at their chiral centers have been assigned by using enantiomer-sensitive Bijvoet pairs; they agree with the known absolute configuration of menthol.

From this literature《Comparison of the conformation of 3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] in the solid state and in solution》,we know some information about this compound(3229-00-3)Synthetic Route of C5H8Br4, but this is not all information, there are many literatures related to this compound(3229-00-3).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Safety of Hydrogen tetrachloroaurate(III) trihydrate. 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 From Nanoparticle Heteroclusters to Filament Networks by Self-Assembly at the Water-Oil Interface of Reverse Microemulsions. Author is Fortes Martin, Rebeca; Thuenemann, Andreas F.; Stockmann, Joerg M.; Radnik, Joerg; Koetz, Joachim.

Surface self-assembly of spherical nanoparticles of sizes below 10 nm into hierarchical heterostructures is under arising development despite the inherent difficulties of obtaining complex ordering patterns on a larger scale. Due to template-mediated interactions between oil-dispersible superparamagnetic nanoparticles (MNPs) and polyethylenimine-stabilized gold nanoparticles (Au(PEI)NPs) at the water-oil interface of microemulsions, complex nanostructured films can be formed. Characterization of the reverse microemulsion phase by UV-vis absorption revealed the formation of heteroclusters from Winsor type II phases (WPII) using Aerosol-OT (AOT) as the surfactant. SAXS measurements verify the mechanism of initial nanoparticle clustering in defined dimensions. XPS suggested an influence of AOT at the MNP surface. Further, cryo-SEM and TEM visualization demonstrated the elongation of the reverse microemulsions into cylindrical, wormlike structures, which subsequently build up larger nanoparticle superstructure arrangements. Such WPII phases are thus proven to be a new form of soft template, mediating the self-assembly of different nanoparticles in hierarchical network-like filaments over a substrate during solvent evaporation

If you want to learn more about this compound(Hydrogen tetrachloroaurate(III) trihydrate)Safety of Hydrogen tetrachloroaurate(III) trihydrate, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(16961-25-4).

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, Article, Journal of Photochemistry and Photobiology, B: Biology called Ionic liquid functionalized biogenic synthesis of Ag-Au bimetal doped CeO2 nanoparticles from Justicia adhatoda for pharmaceutical applications: Antibacterial and anti-cancer activities, Author is Nithya, Pandiyan; Sundrarajan, Mahalingam, the main research direction is silver gold cerium oxide Justicia antibacterial anticancer ionic liquid; Ag-Au/CeO(2); Anti-bacterial; Anti-cancer; Green synthesis; Justicia adhatoda; [BMIM] PF(6).Name: Hydrogen tetrachloroaurate(III) trihydrate.

The noble metal such as Ag and Au doped CeO2 nanoparticles was successfully prepared by ionic liquid assisted hydrothermal method in the presence of Justicia adhatoda leaves extract and were used as an antibacterial and anticancer agent. The FT-IR and Raman spectrum exhibit the peaks at 460 and 464 cm-1 assigned to Ce-O stretching vibrations of NPs. The electron microscopic micrographs confirmed the spherical shaped morphol. of prepared NPs. The insertion of Ag and Au ions into the CeO2 surface creates lattice defects the leads to reduce the band gap energy of Ag-Au/CeO2 at 3.15 eV. The XRD results suggested the average crystalline size of the silver-gold loaded CeO2 was 28 nm. From the elemental mapping images, we have visualized that existence and uniform distribution of Ag, Au, Ce, and O in the prepared nanomaterials. The antibacterial activity of unloaded and bimetal loaded CeO2 NPs was evaluated with Gram-pos. and Gram-neg. bacteria using disk diffusion assay. The Ag-Au loaded CeO2 NPs exhibited the highest zone of inhibition against E. coli and S. aureus strains when compared with pristine CeO2, Ag loaded CeO2 and Au loaded CeO2 NPs. In addition, the 100μg mL-1 of CeO2, Ag/CeO2, Au/CeO2 and Ag-Au/CeO2 NPs exposed the 50, 51, 52 and 56% of anticancer activity against the HeLa cells resp. Overall, this study concludes that the ionic liquid functionalized green synthesized bimetal loaded cerium oxide NPs showed potent antibacterial and anticancer activities.

If you want to learn more about this compound(Hydrogen tetrachloroaurate(III) trihydrate)Name: Hydrogen tetrachloroaurate(III) trihydrate, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(16961-25-4).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Safety of Pentaerythrityltetrabromide. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Synthesis and structure characterization of 1,3-dibromo-2,2-bis(bromomethyl)propane. Author is Peng, Yong-li; Luo, Can; Chen, Bai-guang.

To solve the problems of complicated production process conditions and low production rate of 1,3-dibromo-2,2-bis(bromomethyl)propane, pentaerythritol, benzenesulfonyl chloride and sodium bromide were applied as raw materials to prepare pentaerythrityl bromide through two-step method. The optimum preparation technol. of pentaerythritol bromide was studied by orthogonal experiment of four factors and three levels, the optimum process parameters were reaction time of 12 h, reaction temperature of 150°C, catalyst of 5%, feed ratio of 1 : 6.2, and the yield of pentaerythritol bromide reached to 90.85%. IR spectrum showed that the hydroxyl characteristic peak disappeared entirely, and bromine-carbon bond was generated. Hydrogen NMR figure showed that the methylene protons unimodal appeared on 3.59. As a result, the production rate increased significantly by this way, and the product was pure without byproducts and could be used directly. It had important significance for the com. process of 1,3-dibromo-2,2-bis(bromomethyl)propane.

If you want to learn more about this compound(Pentaerythrityltetrabromide)Safety of Pentaerythrityltetrabromide, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3229-00-3).

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem