Tag: 300-400

The author of 《A Mesoporous Aluminosilicate Nanoparticle-Supported Nickel-Boron Composite for the Catalytic Reduction of Nitroarenes》 were Hauser, Jesse L.; Amberchan, Gabriella; Tso, Monique; Manley, Ryan; Bustillo, Karen; Cooper, Jason; Golden, Josh H.; Singaram, Bakthan; Oliver, Scott R. J.. And the article was published in ACS Applied Nano Materials in 2019. Formula: Br3In The author mentioned the following in the article:

An amorphous nickel and boron composite (NBC) was synthesized from nickel chloride hexahydrate (NiCl2·6H2O) and sodium borohydride (NaBH4) in absolute ethanol, both in bulk and supported on mesoporous aluminosilicate nanoparticles (MASN). Comparatively, NBC-MASN demonstrated better catalytic activity for the selective reduction of the nitro group on a variety of polysubstituted nitroarenes, using hydrazine hydrate (N2H4·H2O) as the reducing agent at 25 °C. Reuse and regeneration of NBC-MASN for the reduction of p-nitrotoluene to p-toluidine were studied with NaBH4 acting as a regeneration agent. Good catalytic activity was sustained through nine reuse cycles when equimolar NaBH4 was present in situ with N2H4·H2O (99%-67% isolated aniline yield). The structure and composition of NBC and NBC-MASN were examined by electron microscopy, energy dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (PXRD), XPS, thermogravimetric anal. (TGA), and inductively coupled plasma optical emission spectroscopy (ICP-OES). The results for NBC-MASN show that a thin (<10 nm) amorphous coating forms over the MASN surface, consisting of a mixture of metallic and oxidized nickel (9 wt % Ni), and various species of boron (at. ratio of Ni:B = 2). For unsupported NBC, metallic nickel nanocrystals (1-3 nm) were discovered imbedded within an amorphous matrix of a similar composition Upon calcination at 550 °C in a N2 atmosphere, partial conversion of unsupported NBC to crystalline Ni3B was observed, whereas only crystalline metallic Ni was observed for NBC-MASN. To explain these differences, further evidence is given to suggest the presence of residual boron hydrides encapsulated in the bulk unsupported NBC, suggesting Ni3B was an artifact of processing rather than an initial product. The experimental part of the paper was very detailed, including the reaction process of Indium(III) bromide(cas: 13465-09-3Formula: Br3In)

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.Formula: Br3In

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Organic Chemistry included an article by Mallick, Sudesh; Maddala, Sudhakar; Kollimalayan, Kalidass; Venkatakrishnan, Parthasarathy. Product Details of 6825-20-3. The article was titled 《Oxidative Coupling of Carbazoles: A Substituent-Governed Regioselectivity Profile》. The information in the text is summarized as follows:

Oxidative C-C coupling of carbazoles possessing various substituents is demonstrated in the presence of organic (metal-free) recyclable oxidants, such as DDQ or CA/H+, for accessing bicarbazole regioisomers. Differently substituted carbazoles are examined to showcase regioselective discrimination (3,3′- vs. 1,3′-bicarbazoles) and preferences based on sterics and electronics in oxidative coupling. Finally, a mechanism that involves the carbazole radical cation has been traced (evidenced) and proposed on the basis of the UV-vis-NIR absorption and EPR spectroscopy results. This study underlines the strategic chem. preparation of a series of bicarbazoles in an efficient manner. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Product Details of 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.Product Details of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A New Biscarbazole-Based Metal-Organic Framework for Efficient Host-Guest Energy Transfer》 was written by Mu, Qianqian; Liu, Jingjuan; Chen, Weiben; Song, Xiaoyu; Liu, Xiaoting; Zhang, Xiaotao; Chang, Ze; Chen, Long. Reference of 3,6-Dibromo-9H-carbazoleThis research focused onzinc bicarbazoletetracarboxylate MOF host guest energy transfer fluorescent dye; crystal structure zinc bicarbazoletetracarboxylate MOF preparation fluorescence energy transfer; energy transfer; fluorescence; host-guest systems; in situ encapsulation; metal-organic frameworks. The article conveys some information:

A new metal-organic framework (MOF), [Zn6L4(Me2NH2+)4·H2O] (1) was constructed based on [9,9′-biscarbazole]-3,3′,6,6′-tetracarboxylic acid (H4L) and Zn2+ ions. The porous framework and intense blue fluorescence of the MOF based on the biscarbazole moiety of the ligand could facilitate efficient host to guest energy transfer, which makes it an ideal platform for the tuning of luminescence. The results came from multiple reactions, including the reaction of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Reference of 3,6-Dibromo-9H-carbazole)

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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Reference of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 6825-20-3In 2021 ,《Thin-Film Luminescent Solar Concentrator Based on Intramolecular Charge Transfer Fluorophore and Effect of Polymer Matrix on Device Efficiency》 was published in Polymers (Basel, Switzerland). The article was written by Mateen, Fahad; Lee, Namcheol; Lee, Sae Youn; Taj Ud Din, Syed; Yang, Woochul; Shahzad, Asif; Kaliamurthy, Ashok Kumar; Lee, Jae-Joon; Hong, Sung-Kyu. The article contains the following contents:

Luminescent solar concentrators (LSCs) provide a transformative approach to integrating photovoltaics into a built environment. In this paper, we report thin-film LSCs composed of intramol. charge transfer fluorophore (DACT-II) and discuss the effect of two polymers, polymethyl methacrylate (PMMA), and poly (benzyl methacrylate) (PBzMA) on the performance of large-area LSCs. As observed exptl., DACT-II with the charge-donating diphenylaminocarbazole and charge-accepting triphenyltriazine moieties shows a large Stokes shift and limited re-absorption losses in both polymers. Our results show that thin-film LSC (10 x 10 x 0.3 cm3) with optimized concentration (0.9 wt%) of DACT-II in PBzMA gives better performance than that in the PMMA matrix. In particular, optical conversion efficiency (ηopt) and power-conversion efficiency (ηPCE) of DACT-II/PBzMA LSC are 2.32% and 0.33%, resp., almost 1.2 times higher than for DACT-II/PMMA LSC. In the experiment, the researchers used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Recommanded Product: 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 in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Recommanded Product: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sun, Yanni; Yang, Xikang; Jiao, Wei; Wu, Jun; Zhao, Zhenfu published their research in ACS Applied Electronic Materials in 2021. The article was titled 《All-Inorganic Perovskite Quantum Dots Based on InX3-Trioctylphosphine Oxide Hybrid Passivation Strategies for High-Performance and Full-Colored Light-Emitting Diodes》.Application In Synthesis of Indium(III) bromide The article contains the following contents:

All-inorganic perovskite quantum dot (PeQD) light-emitting diodes (QLEDs) are promising candidates for the next-generation flat-panel displays and semiconductor lighting technol. However, the stability issues severely limit their com. applications. In this study, highly stable CsPbX3 (X = Cl, Br, I) PeQD films were prepared using InX3 (X = Cl, Br, I) and trioctylphosphine oxide (TOPO) as inorganic-organic hybrid ligands to passivate the surface defects of PeQDs. The obtained InX3-TOPO-CsPbX3 PeQDs not only have high photoluminance quantum yields (PL QYs) and very narrow emission (14-35 nm) but also possess long-term stability. This is mainly due to the synergistic effect of InX3 and TOPO inorganic-organic surface ligand passivation, which can effectively inhibit the halogen vacancy and reduce the surface defect of PeQDs. In addition, the chem. states of InBr3-TOPO-CsPbBr3 PeQDs were analyzed by XPS technol. and it was found that InX3-TOPO synergistic surface passivation can effectively reduce the Pb=O bond in the crystal lattice. Moreover, full-colored perovskite QLEDs based on InX3-TOPO-CsPbX3 PeQDs were achieved by using ZnO/PBD as the double electron transport layer, NiO/TFB as the double hole transport material, and InX3-TOPO-CsPbX3 PeQDs as the light-emitting layer. The EQE (%) and luminance (cd m-2) of red, green, and blue QLEDs based on these InX3-TOPO-CsPbX3 PeQDs were 8.2% and 9080 cd m-2, 7.8% and 18,600 cd m-2, and 1.62% and 164 cd m-2, resp. This cooperative effect based on the InX3-TOPO hybrid passivation strategy will open a way for the preparation of highly efficient, stable, and color-tunable perovskite QLEDs. In the experiment, the researchers used many compounds, for example, Indium(III) bromide(cas: 13465-09-3Application In Synthesis of Indium(III) bromide)

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.Application In Synthesis of Indium(III) bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Continuous Nucleation and Size Dependent Growth Kinetics of Indium Phosphide Nanocrystals》 was published in Chemistry of Materials in 2020. These research results belong to McMurtry, Brandon M.; Qian, Kevin; Teglasi, Joseph K.; Swarnakar, Anindya K.; De Roo, Jonathan; Owen, Jonathan S.. Application of 13465-09-3 The article mentions the following:

Aminophosphines derived from N,N’-disubstituted ethylenediamines (R-N(H)CH2CH2N(H)-R; R = ortho-tolyl, Ph, benzyl, iso-Pr, and n-octyl) were used to adjust the kinetics of InP nanocrystal formation by more than 1 order of magnitude. UV-visible absorption and 31P NMR measurements demonstrate that the rate of nanocrystal formation is limited by the precursor reactivity. At low temperature (180°C), crystal nucleation is concurrent with growth throughout the reaction, rather than occurring in a burst at early times. The low temperature produces a narrow range of small sizes (d = 4.2-4.9 nm) regardless of the precursor used. Higher temperatures (up to 270°C) promote growth to larger sizes (d ≤ 7.8 nm), shorten the nucleation period, and create conditions where the final size is controlled by the precursor conversion reactivity. The temperature dependence is proposed to arise from growth kinetics that slow as the nanocrystal size increases, a novel surface attachment limited size distribution-focusing mechanism. Such a mechanism supports a narrow size distribution without separating the nucleation and growth phases. In the part of experimental materials, we found many familiar compounds, such as Indium(III) bromide(cas: 13465-09-3Application of 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.Application of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Triarylborane catalysed N-alkylation of amines with aryl esters》 was published in Catalysis Science & Technology in 2020. These research results belong to Nori, Valeria; Dasgupta, Ayan; Babaahmadi, Rasool; Carlone, Armando; Ariafard, Alireza; Melen, Rebecca L.. Application of 6825-20-3 The article mentions the following:

Herein, the N-alkylation reactions of a wide variety of amine substrates such as di-Ph amine, N-Me aniline, indoline, 9H-carbazole, etc. with aryl esters 4-FC6H4C(O)OCH(R)R1 (R = Ph, 4-fluorophenyl, naphthalen-2-yl, etc.; R1 = Me, cyclohexyl, 2-phenylethynyl, etc.) using catalytic amounts of B(C6F5)3 were described. This mild reaction protocol gives access to N-alkylated products RCH(R1)N(4-R2C6H4)R3 (R2 = H, Me, t-Bu; R3 = Me, Ph, 4-methylphenyl, 4-tert-butylphenyl)/e.g., I in good to excellent yields (up to 95%). The construction of a C-N bond at the propargylic position has also been demonstrated to yield synthetically useful propargyl amines. On the other hand, unsubstituted 1H-indole and 1H-pyrrole at the C3/C2 positions afforded exclusively C-C coupled products R4CH(4-FC6H4)2 (R4 = 1H-indol-3-yl, 1H-pyrrol-2-yl). Extensive DFT studies have been employed to understand the mechanism for this transformation. In the experiment, the researchers used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Application of 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Application of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Stepwise Mechanism for the Bromination of Arenes by a Hypervalent Iodine Reagent》 was published in Journal of Organic Chemistry in 2020. These research results belong to Granados, Albert; Shafir, Alexandr; Arrieta, Ana; Cossio, Fernando P.; Vallribera, Adelina. Product Details of 523-27-3 The article mentions the following:

A mild, metal-free bromination method of arenes has been developed using the combination of bis(trifluoroacetoxy)iodobencene and trimethylsilyl bromide. In situ-formed dibromo(phenyl)-λ3-iodane (PhIBr2) is proposed as the reactive intermediate. This methodol. using PIFA/TMSBr has been applied with success to a great number of substrates (25 examples). The treatment of mono-substituted activated arenes led to para-brominated products (2u-z) in excellent 83-96% yields. D. functional theory calculations indicate a stepwise mechanism involving a double bromine addition followed by a type II dyotropic reaction with concomitant re-aromatization of the six-membered ring. The results came from multiple reactions, including the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Product Details of 523-27-3)

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.Product Details of 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Multi-spectroscopic measurements, molecular modeling and density functional theory calculations for interactions of 2,7-dibromocarbazole and 3,6-dibromocarbazole with serum albumin》 were Wang, Lijun; Wu, Xiaoqin; Yang, Yanan; Liu, Xina; Zhu, Meiqing; Fan, Shisuo; Wang, Zhen; Xue, Jiaying; Hua, Rimao; Wang, Yi; Li, Qing X.. And the article was published in Science of the Total Environment in 2019. Formula: C12H7Br2N The author mentioned the following in the article:

2,7-Dibromocarbazole (2,7-DBCB) and 3,6-dibromocarbazole (3,6-DBCB) are emerging environmental pollutants, being potentially high risks to human health. In this study, interactions of the two compounds with human serum albumin (HSA) and bovine serum albumin (BSA) were investigated by mol. modeling, d. functional theory calculations (DFT) and multispectral techniques. The static quenching interaction deduced in the fluorescence quenching experiment is confirmed by the time-resolved analyses. The interactions of the two compounds with HSA/BSA induce mol. microenvironment and conformation changes, as assessed by synchronous and 3D fluorescence spectra, together with a destruction of polypeptide carbonyl hydrogen bond network by CD and Fourier transform IR analyses. The thermodn. anal. indicated that the spontaneous interaction was hydrogen bonding and hydrophobic forces. The binding constant Ka at 298 K was 3.54 × 105 M-1 in HSA-2,7-DBCB, 6.63 × 105 M-1 in HSA-3,6-DBCB, 1.32 × 105 M-1 in BSA-2,7-DBCB and 2.17 × 105 M-1 in BSA-3,6-DBCB. These results indicates that 3,6-DBCB binds HSA/BSA more strongly than 2,7-DBCB, which was estimated with DFT calculations Site marker competition experiments coupled with mol. modeling studies confirmed that both compounds bind HSA/BSA at site I (subdomain IIA). The results suggest that interactions between 2,7-DBCB and 3,6-DBCB with HSA and BSA may affect the normal physiol. activities in human and animals. In the part of experimental materials, we found many familiar compounds, such as 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Formula: 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.Formula: C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Scheurle, Patricia I.; Maehringer, Andre; Haug, Tabea; Biewald, Alexander; Axthammer, Daniel; Hartschuh, Achim; Harms, Lena; Wittstock, Gunther; Medina, Dana D.; Bein, Thomas published an article in Crystal Growth & Design. The title of the article was 《Helical Anthracene-Ethyne-Based MOF-74 Analogue》.Safety of 9,10-Dibromoanthracene The author mentioned the following in the article:

A flexible, electron-rich building block was integrated into the backbone of a metal-organic framework with a MOF-74 topol. The building block comprises a central anthracene core connected to acetylene groups. Solvothermal synthesis with Mn2+ yields a highly crystalline anthracene-ethyne-based MOF-74 structure. It shows an unusual helical rod-like morphol., exhibiting visible light absorption and photoluminescence. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Safety of 9,10-Dibromoanthracene)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.Safety of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary