Category: 16961-25-4

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

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Category: imidazoles-derivatives. 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 Photo-catalytic hydrogen production over Au/g-C3N4: effect of gold particle dispersion and morphology. Author is Caux, M.; Menard, H.; AlSalik, Y. M.; Irvine, J. T. S.; Idriss, H..

Metal/semiconductor interactions affect electron transfer rates and this is central to photocatalytic hydrogen ion reduction While this interaction has been studied in great detail on metal oxide semiconductors, not much is known of Au particles on top of polymeric semiconductors. The effects of gold nanoparticle size and dispersion on top of g-C3N4 were studied by core and valence level spectroscopy and transmission electron microscopy in addition to catalytic tests. The as-prepared, non-calcined catalysts displayed Au particles with uniform dimension (mean particle size = 1.8 nm) and multiple electronic states: XPS Au 4f7/2 lines at 84.9 and 87.1 eV (each with a spin-orbit splitting of 3.6-3.7 eV). These particles, which did not show localized surface plasmon resonance (LSPR), before the reaction, doubled in size after the reaction giving a pronounced LSPR at about 550 nm. The effect of the heating environment on these particles (in air or in H2) was further investigated. While heating in H2 gave Au nanoparticles of different shapes, heating under O2 gave exclusively spherical particles. Similar activity towards photocatalytic hydrogen ion reduction under UV excitation was seen in both cases, however. XPS Au 4f analyses indicated that an increase in deposition time, during catalyst preparation, resulted in an increase in the initial fraction of oxidized gold particles, which were easily reduced under hydrogen. The valence band region for Au/gC3N4 was further studied in an effort to compare it to what is already known for Au/metal oxide semiconductors. A shift of over 2 eV for the Au 5d doublets was noticed between reduced and oxidized gold particles with mean particle sizes between 2 and 6 nm, which is consistent with the final state effect. A narrow range of gold loading for optimal catalytic performance was seen, where it seems that a d. of one Au particle per 10 × 10 nm2 is the most suitable. Particle size and shape had a minor effect on performance, which may indicate the absence of a plasmonic effect on the reaction rate.

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Imidazole – Wikipedia,
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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 Antifungal effects of ZnO-TiO2/Au nanostructures on Aspergillus flavus.Recommanded Product: 16961-25-4.

The aim of the present study was to synthesize ZnO-TiO2/Au (Zn/Ti weight ratio of 1/1, the concentration of gold of 5-15 wt%) nanostructures using zinc acetate, titanium isopropoxide, and hydrogen tetra chloroauric through the sol-gel method. Physicochem. in vitro antifungal properties along with the morphol. characterization are investigated via MIC, MFC, and ROS tests. All synthesized nanoparticles showed that A. flavus growth inhibition of ZnO-TiO2/Au (MIC = 0.625 μg/mL) showed higher antifungal activity against A. flavus at 15 wt% of Au than ZnO-TiO2 nanostructures (MIC = 78 μg/mL). Based on our findings, all of ZnO-TiO2/Au samples showed higher ROS production, which led to the induction of oxidative stress which is the reason of higher fungicide effect of Au-containing samples. In conclusion, the obtained Au-doped samples with enhanced chem. reactivity have a great potential for antifungal properties. Therefore, this work indicated ZnO-TiO2/Au has good potential with excellent clin. applications.

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Imidazole – Wikipedia,
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Synthetic Route of AuCl4H7O3. 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: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Electrochemical sandwich-type immunosensor for the detection of PSA based on a trimetallic AgAuPt nanocomposite synthesized using the galvanic replacement reaction. Author is Khanmohammadi, Akbar; Afkhami, Abbas; Hajian, Ali; Khoshsafar, Hosein; Bagheri, Hasan.

A sandwich-type electrochem. immunoassay was introduced for the determination of the prostate-specific antigen (PSA) biomarker. A direct and simple galvanic replacement reaction was performed between the Ag framework and metallic salts of tetrachloroauric(III) acid trihydrate and chloroplatinic acid to produce a trimetallic composite of AgAuPt. The trimetallic composite of AgAuPt was applied to the preparation of the capture layer of the immunoassay for stabilizing the primary Ab at the surface of the prepared composite. The immunoassay detection layer was also prepared using a labeled antibody containing a bimetallic composite of AgPt as a label. The various procedures in the immunoassay fabrication were monitored step by step using cyclic voltammetry and electrochem. impedance spectroscopy. Also, the electrochem. determination of PSA was performed using differential pulse voltammetry in the presence of the ferrocene redox probe and H2O2. Furthermore, the effective parameters in the fabrication of the immunoassay included the drop volume of the AgAuPt trimetallic composite and the incubation time for the immobilization of biomols. (i.e., Ab1, BSA, PSA, and labeled Ab2), and the concentration of H2O2 were optimized during the determination of PSA. Then, the determination of PSA was performed under optimized conditions. It could be seen that there was a linear relation between the PSA concentration and DPV responses in the concentration range of 50 pg mL-1 to 500 ng mL-1 and the limit of detection (LOD) for the proposed immunoassay was calculated as 17.0 pg mL-1. In the following investigation, the cross-reactivity of the proposed immunoassay was studied in the presence of BSA, CEA, IgG, and human hepatitis surface antigen, in which the results showed a negligible change in the performance of the immunoassay.

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Imidazole – Wikipedia,
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SDS of cas: 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 Dose-dependent efficacy of gold clusters on rheumatoid arthritis therapy. Author is Yuan, Qing; Zhao, Yao; Cai, Pengju; He, Zhesheng; Gao, Fuping; Zhang, Jinsong; Gao, Xueyun.

Chronic inflammation and progressive bone damage in joints are two main pathol. features of rheumatoid arthritis (RA). We have synthesized a gold cluster with glutathione (Au29SG27) (named GA) that can effectively suppress both inflammation and bone damage in collagen-induced arthritis (CIA) in rats. Thus, gold clusters showed great potential for the therapy of RA. However, the optimal therapeutic dose remaining has to be determined Therapeutic effect and safety are largely relying on drug dosage. Specifying the dose-dependent effects of GA on both therapy and biosafety can facilitate its clin. transformation research. Therefore, in this study, we comprehensively evaluated the dose-dependent efficacy of GA on the 30-day toxicity and RA treatment in rats. Results showed that continuous i.p. injection of GA at a dose of 15 mg/kg (Au content) for 30 days resulted in slight hematol. abnormalities and increases on organ coefficients of kidney and adrenal gland, while 10 mg Au/kg did not cause any obvious toxicity and side effects. In the treatment of CIA rats, only when the dose of GA reached 5 mg Au/kg, the symptoms of RA could be significantly improved. With regard to the histopathol. anal., although a lower dose of GA can suppress inflammation and bone damage to some extent, only the 5 mg Au/kg treatment could restore them to a state close to the normal control group. Therefore, we infer that 5 mg Au/kg is the optimal dose of GA for RA therapy in rats, which provides a theor. basis for further preclin. research.

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Imidazole – Wikipedia,
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Application 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 Synthesis of ultra-small gold nanoparticles by polyphenol extracted from Salvia officinalis and efficiency for catalytic reduction of p-nitrophenol and methylene blue. Author is Oueslati, Mohamed Habib; Ben Tahar, Lotfi; Abdel Halim Harrath.

The present research work reports an eco-friendly route for preparing gold nanoparticles (AuNPs) with high catalytic activity using polyphenol extracted from salvia officinalis. In both alk. (pH ∼ 11) and acidic media (pH ∼ 5), the polyphenol induced rapid reduction of the Au (III) salt and lead to the formation of highly monodisperse and spherical small (S) and larger (L) AuNPs, resp. The average particle size was found to be ∼ 6 nm for S and ∼ 27 nm for L AuNPs, resp. FT-IR revealed that polyphenol species are capped onto the nanoparticles surface favorizing a high aqueous colloidal stability of the AuNPs in a wide pH range. In addition, the produced AuNPs exhibited significant size-dependent degradation rate of p-nitrophenol (p-NP) and methylene blue (MB) to p-aminophenol (p-AP) and leucomethylene blue (LMB), resp.

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Formula: AuCl4H7O3. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Highly efficient direct electron transfer bioanode containing glucose dehydrogenase operating in human blood. Author is Gineityte, Justina; Meskys, Rolandas; Dagys, Marius; Ratautas, Dalius.

Energy generation from bodily fluids (i. e. blood) is a significant challenge, which could be solved by designing high-performance direct electron transfer (DET) enzymic electrodes. In this paper we report a highly efficient enzymic DET bioanode based on glucose dehydrogenase, which is uniquely wired to polyaniline, gold nanoparticles and cysteamine modified gold electrode. The designed electrode demonstrates an exceptional performance by generating high chronoamperometric c.d. reaching 1 mA cm-2 at 0.1 V vs. SCE in the presence of 5 mM glucose, while in human blood samples the electrode generates average c.d. of 0.65 mA cm-2 at 0.1 V vs. SCE, which is the highest ever reported. Moreover, the electrodes demonstrate a good stability retaining 79% and 23% of the initial activity after the constant operation for 24 h in buffer solutions and blood samples, resp. The designed electrode opens new possibilities for the development of improved implantable low-power electronics.

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Wang, Zexiang; Xing, Keyu; Ding, Nengshui; Wang, Suhua; Zhang, Ganggang; Lai, Weihua 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+] ).Category: imidazoles-derivatives. 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.

Herein, we propose a lateral flow immunoassay (LFIA) based on the dual spectral-overlapped fluorescence quenching of polydopamine nanospheres (PDANs) caused by the inner filter effect to sensitively detect sulfamethazine (SMZ). The fluorescence quenching LFIA device consists of four parts: absorbent pad, polyvinyl chloride pad, sample pad, and nitrocellulose membrane. Compared with traditional quenchers such as gold nanoparticles (AuNPs) with single spectral-overlapped quenching ability, PDANs can quench the excitation light and emission light of three fluorescence donors (aggregation-induced emission fluorescent microsphere, AIEFM; fluorescent microsphere, FM; and quantum dot bead, QB). The fluorescence intensity changes (ΔF) are numerically larger for PDANs-LFIA (ΔFAIEFM = 2315, ΔFFM = 979, ΔFQB = 910) than those for AuNPs-LFIA (ΔFAIEFM = 1722, ΔFFM = 833, ΔFQB =;520). AIEFM-based PDANs-LFIA exhibits a large ΔF (2315) in response to the changes in the SMZ concentration, and produces a high signal-to-noise ratio. The limit of detection (LOD) and visual LOD of LFIA based on PDANs quenching AIEFM for the detection of SMZ in chicken are 0.043 and 0.5 ng/mL, resp. The results confirm that the proposed method can be used for the detection of hazardous materials in practical applications.

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Imidazole – Wikipedia,
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