Tag: 300-400

In 2022,Parsutkar, Mahesh M.; Moore, Curtis E.; RajanBabu, T. V. published an article in Dalton Transactions. The title of the article was 《Activator-free single-component Co(I)-catalysts for regio- and enantioselective heterodimerization and hydroacylation reactions of 1,3-dienes. New reduction procedures for synthesis of [L]Co(I)-complexes and comparison to in situ generated catalysts》.SDS of cas: 13465-09-3 The author mentioned the following in the article:

Although cobalt(I) bis-phosphine complexes have been implicated in many selective C-C bond-forming reactions, until recently relatively few of these compounds have been fully characterized or have been shown to be intermediates in catalytic reactions. In this paper we present a new practical method for the synthesis and isolation of several cobalt(I)-bis-phosphine complexes and their use in Co(I)-catalyzed reactions. We find that easily prepared (in situ generated or isolated) bis-phosphine and (2,6-N-aryliminoethyl)pyridine (PDI) cobalt(II) halide complexes are readily reduced by 1,4-bis-trimethylsilyl-1,4-dihydropyrazine or com. available lithium nitride (Li3N), leaving behind only innocuous volatile byproducts. Depending on the structures of the bis-phosphines, the cobalt(I) complex crystallizes as a phosphine-bridged species [(P-P)(X)CoI[μ-(P-P)]CoI(X)(P-P)] or a halide-bridged species [(P-P)CoI[μ-(X)]2CoI(P-P)]. Because the side-products are innocuous, these methods can be used for the in situ generation of catalytically competent Co(I) complexes for a variety of low-valent cobalt-catalyzed reactions of even sensitive substrates. These complexes are also useful for the synthesis of rare cationic [(P-P)CoI-η4-diene]+[X-] or [(P-P)CoI-η6-arene]+[X-] complexes, which are shown to be excellent single-component catalysts for the following regioselective reactions of dienes: heterodimerizations with ethylene or Me acrylate, hydroacylation and hydroboration. The reactivity of the single-component catalysts with the in situ generated species are also documented.Indium(III) bromide(cas: 13465-09-3SDS of cas: 13465-09-3) was used in this study.

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.SDS of cas: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Yao, Chengbo; Williams, Alana D. N.; Gu, Yiting; Norton, Jack R. published an article in Journal of Organic Chemistry. The title of the article was 《Isomerization of Aziridines to Allyl Amines via Titanium and Chromium Cooperative Catalysis》.Safety of Ethyltriphenylphosphonium bromide The author mentioned the following in the article:

A Ti/Cr cooperative catalyst isomerized aziridines to allyl amines under mild conditions. The reaction tolerated a broad range of aziridines with various nitrogen substituents. The titanium catalyst was most successful in opening 1,2-disubstituted aziridines, forming radical intermediates in a highly regioselective manner. The chromium catalyst appears to abstract an H• from these radical intermediates and then return the H• to the titanium system in the form of an H+ and an electron. The reaction was complementary to previous reports on the isomerization of aziridines to allyl amines. After reading the article, we found that the author used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Safety of Ethyltriphenylphosphonium bromide)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Safety of Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hu, Hongmei; Zhao, Meirong; Jin, Hangbiao published their research in Journal of Separation Science in 2021. The article was titled 《Determination of polyhalogenated carbazoles in waters at low nanogram-per-liter concentrations with solid-phase disk extraction》.SDS of cas: 6825-20-3 The article contains the following contents:

Polyhalogenated carbazoles, a class of emerging contaminants with persistence and dioxin-like toxicity, have received increasing attention in recent years. In this study, a simple, rapid, sensitive, and high throughput method based on solid-phase disk extraction and gas chromatog.-mass spectrometry was described for the determination of polyhalogenated carbazoles in low nanogram-per-liter range in water samples. The proposed solid-phase disk extraction method was initially optimized, and the optimum exptl. conditions found were 1 L water sample (pH 6-9) extracted and enriched by Empore 3-stn octadecyl disk at flow rate of 5 to 50 mL/min and eluted by 5 mL of acetone and 3 x 10 mL methylene dichloride. The linearity of the method ranged from 0.2 to 50 ng/L for carbazole and 11 polyhalogenated carbazoles, with correlation coefficients ranging from 0.9951 to 0.9996. The limits of detection were in the low nanogram per L level, ranging from 0.018 to 0.12 ng/L. Finally, the optimized method was applied for determining trace levels of carbazole and 11 polyhalogenated carbazoles in tap water and seawater samples with good recovery of 86.6-112.8%. Carbazole and 3-7 polyhalogenated carbazoles were detected, and 3,6-dichlorocarbazole was the predominant congener both in tap water and seawater. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3SDS of cas: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.SDS of cas: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hong, Haitao; Wu, Ni; Han, Mingxi; Guo, Zhiyong; Zhan, Hongbing; Du, Shaowu; Chen, Banglin published their research in Materials Chemistry Frontiers in 2021. The article was titled 《An anthracene based conjugated triazine framework as a luminescent probe for selective sensing of p-nitroaniline and Fe(III) ions》.SDS of cas: 523-27-3 The article contains the following contents:

Covalent triazine frameworks (CTFs), as a burgeoning type of porous organic material, have attracted increasing attention in a lot of research fields, including gas separation, heterogeneous catalysis, etc. In particular, stemming from their heteroatom effect (HAE), incorporated with the merits of π-conjugated frameworks, electron-rich triazine units and extraordinary chem. stability, they exhibit prospective potential applications in chem. sensing. In this paper, a triazine-based conjugated porous organic polymer (DPA-CTF) containing anthracene units was used to study the sensing effects on nitroarom. compounds and metal ions. Intriguingly, DPA-CTF showed sensitive detection performance towards nitroarom. explosives, especially p-nitroaniline (p-NA). Besides, it also exhibited high sensitivity toward Fe3+ ions compared to other metal ions. A series of characterization studies and computational simulations were used to explain the mechanism of the luminescence quenching effect. These results manifest that the new synthesized CTF is a promising candidate as a chem. sensor for p-NA and Fe3+ ions. In addition to this study using 9,10-Dibromoanthracene, there are many other studies that have used 9,10-Dibromoanthracene(cas: 523-27-3SDS of cas: 523-27-3) was used in this study.

9,10-Dibromoanthracene(cas: 523-27-3) can be sublimated and oxidized to generate anthraquinone. Soluble in hot benzene and hot toluene, slightly soluble in alcohol, ether and cold benzene, insoluble in water.SDS of cas: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Organic Chemistry included an article by Empel, Claire; Patureau, Frederic W.; Koenigs, Rene M.. HPLC of Formula: 6825-20-3. The article was titled 《Visible Light Induced Metal-Free Carbene N-Carbazolation》. The information in the text is summarized as follows:

Metal-free N-H functionalization reactions represent an important strategy for sustainable C-N coupling reactions. In this report, we describe the visible light photolysis of aryl diazoacetates in the presence of some N-heterocycles that enables mild, metal-free N-H functionalization reactions of carbazole and azepine heterocycles (15 examples, up to 83% yield). After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3HPLC of Formula: 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.HPLC of Formula: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,New Journal of Chemistry included an article by Kobra, Khadijatul; Li, Yuxuan; Sachdeva, Rakesh; McMillen, Colin D.; Pennington, William T.. Recommanded Product: Methyltriphenylphosphonium bromide. The article was titled 《New polymorphism and structural sensitivity in triphenylmethylphosphonium trihalide salts》. The information in the text is summarized as follows:

In the course of our ongoing study of halogen bonding in cocrystals of organoiodine mols. with triiodide salts, we have isolated three of the four known polymorphs of triphenylmethylphosphonium triiodide (PPh3MeI3) and found that one of the tetramorphs exhibits a low temperature phase transition not previously described in the literature. Variable temperature crystallog. studies coupled with differential scanning calorimetry were used to determine the transition temperature and solid-state single crystal to single crystal reversibility of the phase change. To monitor the effect of the size of the anion, bromine was introduced to the reaction mixtures to produce trihalide salts (PPh3MeX3) having varying degrees of mixed iodine and bromine content. The resulting modification of anion size led to structural perturbations beyond those previously observed for the PPh3MeI3 polymorphs, giving three different structure types with similar but not identical packing arrangements of the ions. In addition to providing insight into the effect of subtle changes to crystal packing, the mixed trihalides offer structural and electronic tuning to the applicability of rod-shaped trihalides and functional halogen bonding acceptors. In addition to this study using Methyltriphenylphosphonium bromide, there are many other studies that have used Methyltriphenylphosphonium bromide(cas: 1779-49-3Recommanded Product: Methyltriphenylphosphonium bromide) was used in this study.

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is an organophosphorus compound, with potential use as a precursor and a solvent in organic synthesis. And it is used widely for methylenation via the Wittig reaction.Recommanded Product: Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Luminescence included an article by Majeed, Shereen A.; Nwaji, Njemuwa; Mack, John; Nyokong, Tebello; Makhseed, Saad. Computed Properties of C12H7Br2N. The article was titled 《Nonlinear optical responses of carbazole-substituted phthalocyanines conjugated to graphene quantum dots and in thin films》. The information in the text is summarized as follows:

Three different phthalocyanine complexes substituted with carbazoles were conjugated to graphene quantum dots (GQDs) through π-π stacking. The morphologies, sizes, and crystallinities of the nanoconjugates were determined using Raman spectroscopy, energy dispersive X-ray spectroscopy, transmission electron microscopy, and X-ray diffraction. The nonlinear optical (NLO) properties of the metallophthalocyanines alone and when conjugated to the GQD nanomaterial in different solvents, as well as after having been embedded in thin films, were studied. The effects of the different substituents and solvents on the NLO properties of the metallophthalocyanines were evaluated. Enhancements in the photophys. properties of the complexes upon conjugation with the nanomaterial were observed Fluorescence quantum yields, fluorescence lifetimes, triplet quantum yields, and triplet lifetimes were measured for the complexes, and for their conjugates in DMSO. The results came from multiple reactions, including the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Computed Properties of C12H7Br2N)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Computed Properties of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Tunable emission of AgIn5S8 and ZnAgIn5S8 nanocrystals: electrosynthesis, characterization and optical application》 was written by Sousa, F. L. N.; Freitas, D. V.; Silva, R. R.; Silva, S. E.; Jesus, A. C.; Mansur, H. S.; Azevedo, W. M.; Navarro, M.. Recommanded Product: 13465-09-3 And the article was included in Materials Today Chemistry in 2020. The article conveys some information:

Ternary AgIn5S8 (AIS) and quaternary ZnAgIn5S8-alloy (ZAIS) nanocrystals, stabilized by L-glutathione, were produced by a clean and eco-friendly electrochem. method, eliminating the need of reducing agents. AIS-GSH colloidal solution was obtained by constant current electrolysis (i = 30 mA) in cavity cell. S2- ions (0.051 mmol) were generated into a graphite powder macroelectrode, reacting in the intermediate compartment of the cell containing Ag+/In3+ aqueous solution at different ratios (0.5, 0.28, 0.18, and 0.14), and 0.025 mmol/L-1 glutathione (GSH). ZAIS-GSH NCs were synthesized in the same cavity cell containing the previously prepared AIS-GSH solution A paired electrolysis (i = 30 mA) was used for simultaneous production of Zn2+ and S2- (Zn0 sacrificial anode and graphite powder macroelectrode/S0 cathode). The electrochem. method promoted a high reproducibility and efficient luminescence in the preparations of NCs. The sizes of the AIS-GSH and ZAIS-GSH nanoparticles were determined by HRTM (3.4 and 4.0 nm, resp.), and quantum yields reaching 16% (AIS-GSH, Ag+/In3+ = 0.18). The spectrophotometric characterization showed that Ag+/In3+ ratio can be used for the tuning of the AIS-GSH nanoparticle emission wavelength, which is associated to electronic defects introduced in the NCs lattice. XRD/EDS anal. of ZAIS-GSH nanoparticles point out to Zn2+ ion-exchange into the AIS-GSH lattice. XPS anal. was carried out at different etching levels of the ZAIS nanocrystals surface, making possible to identify the 2p Zn doublet signal, indicating two different Zn2+ sites in the alloy structure. Time-resolved spectroscopy measurements/decay curves were carried out to evaluate the effect of silver amount on radioactive and non-radioactive terms. Addnl., the AIS-GSH and ZAIS-GSH photoluminescence and stability were used to produce the active parts of com. white LEDs, and modulate the color perception from the resp. emission bands. In the experiment, the researchers used many compounds, for example, Indium(III) bromide(cas: 13465-09-3Recommanded Product: 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used as a catalyst to produce dithioacetals when unactivated alkynes react with thiols and fields such as optics and microelectronics that utilize semiconductor technology have wide uses for indium in high-performing solar cells.Recommanded Product: 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Synthesis and Spectroscopy of Emissive, Surface-Modified, Copper-Doped Indium Phosphide Nanocrystals》 was published in ACS Materials Letters in 2020. These research results belong to Mundy, M. Elizabeth; Eagle, Forrest W.; Hughes, Kira E.; Gamelin, Daniel R.; Cossairt, Brandi M.. Computed Properties of Br3In The article mentions the following:

Aminophosphine precursors were used to synthesize Cu-doped InP nanocrystals (NCs) via direct doping in a slow-injection bottom-up method and postsynthetic cation exchange. By both methods, the amount of Cu incorporated into the NCs could be tuned simply by varying the molar ratio during synthesis. Common postsynthetic surface modifications such as Lewis acid treatment and Zn chalcogenide shelling were performed on these samples, resulting in an enhancement of the Cu-based emission from 10% to 40%. For samples with thick shells, the Cu-based luminescence quantum yield reached over 60%, a record value for doped InP NCs. Time-resolved luminescence spectroscopy showed increasing carrier lifetimes after surface treatments concurrent with the disappearance of a 2 ns decay process previously attributed to surface trapping in native InP NCs, showing the broad applicability and consistent impacts of the surface treatments. In this way, a route to obtain high-quality near-IR emitters using less toxic alternatives to the popular Pb- and Cd-containing materials was developed. In the experiment, the researchers used Indium(III) bromide(cas: 13465-09-3Computed Properties of Br3In)

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Computed Properties of Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Molecular modeling insights in the extraction of benzene from hydrocarbon stream using deep eutectic solvent》 was published in Journal of Molecular Liquids in 2020. These research results belong to Kumar, Nikhil; Naik, Papu Kumar; Banerjee, Tamal. Application In Synthesis of Methyltriphenylphosphonium bromide The article mentions the following:

The present study aims to elucidate the mol. insights into the extraction of benzene from hydrocarbon mixture using a phosphonium based deep eutectic solvent (DES). The prepared DES consists of the hydrogen bond acceptor (HBA; methyltriphenylphosphonium bromide, MTPB) and hydrogen bond donor (HBD; ethylene glycol) at a molar ratio of 1:4. The at.-level classical mol. dynamic (MD) simulation technique is then employed to investigate the equilibrium phase behavior of the DES + benzene + hexane ternary system with respect to solvent rich and hydrocarbon-rich phases. To observe the effect of feed concentration, three different concentrations were considered from the reported exptl. runs, which gave high selectivity and distribution coefficient values. The non-bonded interaction energies of different species and the structural properties such as radial distribution functions, spatial distribution functions (SDFs), and the average number of hydrogen bonds are then computed. It is found that the cation within the HBA, namely, MTP, initiates interactions with benzene when compared to HBD or its anion (Br). MTP and ethylene glycol both are seen to contribute to the hydrogen bonding with benzene, which results in a higher exptl. solubility value. The calculations of SDFs further reveal the fact that the benzene mols. are evenly distributed around the active sites of the MTP mol., whereas hexane mols. are found to be distributed around the non-active sites of the DES. In order to validate the simulation procedure, the concentration in both the phases was compared with the existing LLE exptl. results. In the penultimate part, 2D 1H-13C Heteronuclear Multiple Bond Correlation (HMBC) NMR is performed for investigating and confirming the hydrogen bonding interactions among components of DES and benzene. The results came from multiple reactions, including the reaction of Methyltriphenylphosphonium bromide(cas: 1779-49-3Application In Synthesis of Methyltriphenylphosphonium bromide)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is used for methylenation through the Wittig reaction. It is utilized in the synthesis of an enyne and 9-isopropenyl -phenanthrene by using sodium amide as reagent. Application In Synthesis of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary