Category: 16961-25-4

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Bose, Paulami; Chakraborty, Papri; Mohanty, Jyoti Sarita; Nonappa; Ray Chowdhuri, Angshuman; Khatun, Esma; Ahuja, Tripti; Mahendranath, Ananthu; Pradeep, Thalappil researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).COA of Formula: AuCl4H7O3.They published the article 《Atom transfer between precision nanoclusters and polydispersed nanoparticles: a facile route for monodisperse alloy nanoparticles and their superstructures》 about this compound( cas:16961-25-4 ) in Nanoscale. Keywords: nanocluster polydisperse nanoparticle monodisperse superstructure atom transfer. We’ll tell you more about this compound (cas:16961-25-4).

Reactions between atomically precise noble metal nanoclusters (NCs) have been studied widely in the recent past, but such processes between NCs and plasmonic nanoparticles (NPs) have not been explored earlier. For the first time, we demonstrate spontaneous reactions between an atomically precise NC, Au25(PET)18 (PET = 2-phenylethanethiol), and polydispersed silver NPs with an average diameter of 4 nm and protected with PET, resulting in alloy NPs under ambient conditions. These reactions were specific to the nature of the protecting ligands as no reaction was observed between the Au25(SBB)18 NC (SBB = 4-(tert-butyl)benzyl mercaptan) and the very same silver NPs. The mechanism involves an interparticle exchange of the metal and ligand species where the metal-ligand interface plays a vital role in controlling the reaction. The reaction proceeds through transient Au25-xAgx(PET)n alloy cluster intermediates as observed in time-dependent electrospray ionization mass spectrometry (ESI MS). High-resolution transmission electron microscopy (HRTEM) anal. of the resulting dispersion showed the transformation of polydispersed silver NPs into highly monodisperse gold-silver alloy NPs which assembled to form 2-dimensional superlattices. Using NPs of other average sizes (3 and 8 nm), we demonstrated that size plays an important role in the reactivity as observed in ESI MS and HRTEM.

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Reference:
Imidazole – Wikipedia,
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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 Photochromic organic cage-encapsulated Au nanoparticles: light-regulated cavities for catalytic reduction of 4-nitrophenol, published in 2020, which mentions a compound: 16961-25-4, Name is Hydrogen tetrachloroaurate(III) trihydrate, Molecular AuCl4H7O3, Recommanded Product: Hydrogen tetrachloroaurate(III) trihydrate.

A diarylethene-based photochromic cage (DPC) with an adjustable cavity upon irradiation with UV and visible light has been designed and synthesized. Au nanoparticles encapsulated in the organic cage with open and closed states (Au@o-DPC and Au@c-DPC) showed different catalytic activities for the reduction of 4-nitrophenol.

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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, Article, Materials Science & Engineering, C: Materials for Biological Applications called Construction and evaluation of tumor nucleus-targeting nanocomposite for cancer dual-mode imaging – Guiding photodynamic therapy/photothermal therapy, Author is Zhou, Jie; Wang, Qiaolei; Geng, Shizhen; Lou, Rui; Yin, Qianwen; Ye, Weiran, which mentions a compound: 16961-25-4, SMILESS is Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+], Molecular AuCl4H7O3, Application In Synthesis of Hydrogen tetrachloroaurate(III) trihydrate.

To tackle the barrier of the insufficient intra-cellular delivery of reactive oxygen species (ROS) and heat, we designed a multifunctional nanoplatform to release ROS and heat directly in the cell nucleus for enhancing combined photodynamic therapy (PDT) and photothermal therapy (PTT) of tumors. As a photothermal agent, WS2 nanoparticles were adsorbed photosensitive Au25(Captopril)-18 (Au25) nanoclusters via electrostatic interaction. And Dexamethasone (Dex), a glucocorticoid with nucleus targeting capability, played a key role in the intra-nuclear process of heat and ROS. PTT can increase intra-tumoral blood flow to promote Au25 produce more ROS for PDT. Under near IR (NIR) laser irradiation at a single 808 nm, these nucleus targeting WS2 nanoplatforms showed a significant decreased cell viability of 18.2 ± 1.7% and a high DNA damage degree of 59.6 ± 8.3%. Furthermore, the WS2 nanoplatform could be further used for X-ray computed tomog. (CT) images. Taken together, our study provided a new prospect for effectively diagnostic and enhancing PTT/PDT efficacy.

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Imidazole – Wikipedia,
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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Facile synthesis of silver-rich Au/Ag bimetallic nanoparticles with highly active SERS properties, published in 2019, which mentions a compound: 16961-25-4, mainly applied to protein anaylsis immunoassay silver gold bimetallic nanoparticle SERS, Quality Control of Hydrogen tetrachloroaurate(III) trihydrate.

The sensitive detection of proteins has attracted great interest in biomedical research since abnormal concentrations of certain proteins often indicate the presence of various chronic diseases. In this work, we propose an immunoassay method based on surface-enhanced Raman scattering (SERS) for the proof-of-concept determination of proteins by using Atto-610 labeled Au/Ag bimetallic nanoparticles (BNPs) as nanotags and a Au/Ag bimetallic film as a substrate. Without the need for added surfactants or organic precursors during the preparation process, silver-enriched Au/Ag BNPs are obtained with relatively clean surfaces by combining a galvanic replacement (GR) reaction with co-reduction of Ag atoms. The changes in morphol., composition and surface plasmon resonance (SPR) involved in the GR reaction are systematically characterized, and the possible mechanism is discussed. The BNPs exhibit considerable SERS activity due to the enrichment of Ag in the nanostructures. Upon the introduction of AuNPs by gold staining, a SERS-based super-sandwich structure is generated that is suitable for immunoassays. Using this approach, rabbit IgG is detected over a wide concentration range with a detection limit of 10 pg L-1.

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Imidazole – Wikipedia,
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Computed Properties of AuCl4H7O3. 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 Rapid identification of triptolide in Tripterygium wilfordii products by gold immunochromatographic assay. Author is Duan, Yaping; Luo, Jiaoyang; Liu, Congmin; Shan, Linan; Dou, Xiaowen; Yang, Shihai; Yang, Meihua.

Triptolide colloidal gold immunoassay strip was prepared by using colloidal gold labeled monoclonal antibody purified with saturated ammonium sulfate, triptolide succinate-bovine serum albumin and sheep anti-mouse IgG for the first time in our laboratory Under optimized conditions, the detection limit of TP strip prepared in this study were determined to be 1μg/mL and the total anal. time (including sample preparation) was less than 50 min. Sixty-six batches of Tripterygium wilfordii (T. wilfordii) and its adulterations were analyzed. It was found that 28 batches of T. wilfordii were pos. as detected by the strips and 38 batches were neg. The result of test strip detection was in consistent with that from the UFLC-ESI-MS/MS method. Gold immunochromatog. assay was demonstrated as a rapid, cost-effective, reliable technique for on-site screening of T. wilfordii and its preparations The prepared colloidal gold immunoassay strip can be conveniently used for rapid identification of triptolide containing products.

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Imidazole – Wikipedia,
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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.

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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.

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Prakash, J.; Prema, D.; Venkataprasanna, K. S.; Balagangadharan, K.; Selvamurugan, N.; Venkatasubbu, G. Devanand published the article 《Nanocomposite chitosan film containing graphene oxide/hydroxyapatite/gold for bone tissue engineering》. Keywords: chitosan graphene oxide hydroxyapatite gold nanocomposite bone tissue engineering; Alkaline phosphatase; Antibacterial activity; Biocompatibility; Chitosan; Graphene oxide; Hydroxyapatite.They researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).HPLC of Formula: 16961-25-4. 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.

Recently, polymer based biomaterials are utilized in medical fields including surgical sutures, drug delivery devices, tissue supports and implants for interior bone fixation. However, polymer based implants leads to the formation of bio-films that are highly susceptible to microbial adhesion. In this study, we have fabricated Chitosan/Polyvinyl alc./Graphene oxide/Hydroxyapatite/gold films for potential orthopedic application. Graphene oxide/Hydroxyapatite/gold nanocomposite (GO/HAP/Au) was synthesized by simple hydrothermal method and GO/HAP/Au nanocomposite incorporated polymeric film was fabricated using gel casting method. The morphol., phase composition, crystalline structure and chem. state of the nanocomposite were characterized using as XRD, HR-TEM, FE-SEM and FT-IR. The bio-films were found to be biocompatible with mouse mesenchymal cells and it enhanced osteoblast differentiation as evidenced by more alk. phosphatase activity at the cellular level. Hence, these results suggested that the developed nanocomposites films are osteogenic potential for treating bone and bone-related diseases. Antibacterial anal. of the films shows high inhibition zones against Gram pos. and Gram Neg. bacteria (Escherichia coli, streptococcus mutans, Staphylococcus aureus and Pseudomonas aeruginosa). Thus, the obtained nanocomposites bio-films are highly biocompatible and it can be used for bone regeneration application.

There is still a lot of research devoted to this compound(SMILES：Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+])HPLC of Formula: 16961-25-4, and with the development of science, more effects of this compound(16961-25-4) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Niu, Haifeng; Li, Jianbo; Wang, Xuefang; Qiang, Zhe; Ren, Jie published the article 《Au-Fe3O4 decorated polydopamine hollow nanoparticles as high performance catalysts with magnetic responsive properties》. Keywords: polydopamine nanoparticle catalyst magnetic responsive property.They researched the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4 ).Application of 16961-25-4. 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.

We demonstrated a simple approach for fabricating Au-Fe3O4/PDA hollow nanoparticles as high-performance catalysts for water purification The polydopamine (PDA) shell was in situ formed on the silica surface from self-polymerization, which acts as a medium support for coupling with metal ions (for Fe3O4 nanoparticle deposition) as well as a reducing agent and stabilizer for Au nanoparticle reduction and deposition. A step of simultaneous Fe3O4 nanoparticle deposition and silica core removal under alk. conditions is first introduced in this study. This process significantly simplifies previous strategies which typically require the use of poisonous agents such as hydrogen fluoride or addnl. complicated post-treatment steps. Under optimized conditions, the Au-Fe3O4/PDA hollow nanoparticles show a high saturation magnetization of 18.8 emu g-1 and an excellent catalytic performance for the rapid reduction of p-nitrophenol with the reaction kinetic constant of 0.34 min-1. This catalyst can be easily recovered using a permanent magnet and recycled eight times with a high catalytic cycle stability. The strategy presented in this work provides a facile and versatile approach towards designing complicated Au-Fe3O4/PDA hollow nanostructures, which might have great potential for many applications within biol., energy, and environmental technologies.

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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, 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.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem