Tag: 300-400

In 2022,Sun, Yuxiang; Yang, Lili; Chen, Changzhi; Li, Cui; Zheng, Minghui; Jin, Rong; Wang, Wenwen; Yang, Nan; Li, Yinming; Liu, Guorui published an article in Rapid Communications in Mass Spectrometry. The title of the article was 《Method development for determination of polyhalogenated carbazoles in industrial waste through gas chromatography/triple quadrupole tandem mass spectrometry》.Application In Synthesis of 3,6-Dibromo-9H-carbazole The author mentioned the following in the article:

Polyhalogenated carbazoles (PHCZs) are dioxin-like compounds that are ubiquitous in the environment. However, their unintentional emissions from industrial sources have received little attention and there is no method available for determination of PHCZs in industrial waste. This research develops a method for determination of PHCZs in industrial waste. In this research, a glass column packed with activated silica serves as a rapid and efficient clean-up pretreatment for purification An isotope dilution gas chromatog./triple quadrupole tandem mass spectrometry method was established for simultaneous determination of eleven PHCZs in industrial samples. The regression coefficients of the standard curves for the congeners were all >0.99. The method detection limit ranged from 1.46 to 3.82 ng/mL for liquid samples and from 0.009 to 0.021 ng/g for solid samples. The precision described by the relative standard deviation ranged from 2.4% to 18.4% for liquid samples and from 5.5% to 35.8% for solid samples. The recovery ranges for the liquid and solid samples were 82%-123% and 83%-137%, resp. 3-Chlorocarbazole (3-CCZ) and 36-dichlorocarbazole (36-CCZ) can be detected in both chem. bottom liquid from vinyl chloride production and fly ash from medical waste incineration by this method. An efficient method is established for determination of PHCZs from industrial waste. The discovery of 3-CCZ and 36-CCZ highlights the importance of identification of potential industrial sources of PHCZs and clarification of their contribution to environmental risks. Our method could be applied to investigate industrial emission of PHCZs. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Application In Synthesis 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.Application In Synthesis of 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of the American Chemical Society included an article by Liu, Wen-Qiang; Lei, Tao; Zhou, Shuai; Yang, Xiu-Long; Li, Jian; Chen, Bin; Sivaguru, Jayaraman; Tung, Chen-Ho; Wu, Li-Zhu. Application In Synthesis of Methyltriphenylphosphonium bromide. The article was titled 《Cobaloxime Catalysis: Selective Synthesis of Alkenylphosphine Oxides under Visible Light》. The information in the text is summarized as follows:

Direct activation of H-phosphine oxide to react with an unsaturated C-C bond is a straightforward approach for accessing alkenylphosphine oxides, which shows significant applications in both synthetic and material fields. However, expensive metals and strong oxidants are typically required to realize the transformation. Here, the authors demonstrate the utility of earth-abundant cobaloxime to convert H-phosphine oxide into its reactive radical species under visible light irradiation The radical species thus generated can be used to functionalize alkenes and alkynes without any external photosensitizer and oxidant. The coupling with terminal alkene generates E-alkenylphosphine oxide with excellent chemo- and stereoselectivity. The reaction with terminal alkyne yields linear E-alkenylphosphine oxide via neutral radical addition, while addition with internal ones generates cyclic benzophosphine oxides and H. Mechanistic studies on radical trapping experiments, ESR studies, and spectroscopic measurements confirm the formation of phosphinoyl radical and Co intermediates that are from capturing the electron and proton eliminated from H-phosphine oxide. The highlight of the authors’ mechanistic study is the dual role played by cobaloxime, viz., both as the visible light absorber to activate the P(O)-H bond as well as a H transfer agent to influence the reaction pathway. This synergetic feature of the cobaloxime catalyst preforming multiple functions under ambient condition provides a convergent synthetic approach to vinylphosphine oxides directly from H-phosphine oxides and alkenes (or alkynes). After reading the article, we found that the author used 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

《1,3-Adamantanedicarboxylate and 1,3-Adamantanediacetate as Uranyl Ion Linkers: Effect of Counterions, Solvents and Differences in Flexibility》 was written by Thuery, Pierre; Atoini, Youssef; Harrowfield, Jack. Electric Literature of C19H18BrPThis research focused onuranyl adamantanediacetate adamantanedicarboxylate coordination polymer preparation crystal structure; photoluminescence luminescence uranyl adamantanediacetate adamantanedicarboxylate coordination polymer. The article conveys some information:

Seven homo- or heterometallic uranyl ion complexes with 1,3-adamantanedicarboxylic acid (H2ADC) or 1,3-adamantanediacetic acid (H2ADA) have been synthesized under solvo-hydrothermal conditions in the presence of different counterions and organic cosolvents, and characterized by their crystal structure and uranyl emission spectrum. [PPh3Me][UO2(ADC)(NO3)] (1) crystallizes as a simple monoperiodic chain, but [PPh4]2[(UO2)2(ADC)3]·2H2O (2) and [PPh4]2[(UO2)2(ADA)3] (3) display trough-like monoperiodic polymers (assembled in pairs in 3) in the cavity of which the counterions are located. A similar arrangement is found in [Ni(cyclen)(H2O)][(UO2)2(ADC)3]·H2O (4). Diaxial bonding of NiII in [(UO2)2(ADC)2Ni(R,S-Me6cyclam)(HCOO)2]·CH3CN (5) and [UO2(ADA)2Ni(R,S-Me6cyclam)] (6) results in bridging monoperiodic uranyl-containing subunits into neutral, diperiodic networks. [UO2(ADA)(DMPU)] (7), containing coordinated N,N’-dimethylpropyleneurea, is also a diperiodic assembly with the common fes topol. type. Except complex 6 which is non-luminescent, all complexes give solid-state emission spectra displaying the usual vibronic fine structure, albeit with low photoluminescence quantum yields. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Electric Literature of C19H18BrP)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.Electric Literature of C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Electric Literature of C14H8Br2In 2021 ,《High efficiency green fluorescent dopant through the optimized side group for organic light emitting diodes》 was published in Journal of Nanoscience and Nanotechnology. The article was written by Kwon, Hyukmin; Kang, Seokwoo; Park, Sangshin; Park, Sunwoo; Lee, Seungeun; Park, Jongwook. The article contains the following contents:

OLED light emitting materials have a mol. size corresponding to the nano scale and are converted into light energy when given elec. energy. The new green fluorescent dopant material was successfully synthesized by using anthracene as a central core and introducing a Me group and tert-Bu group at various positions as diphenylamine group. Two compounds are N9,N9,N10,N10-tetraphenylanthracene-9,10-diamine (TAD) and N9,N10-bis(4-(tert-butyl) phenyl)-N9,N10-di-o-tolylanthracene-9,10-diamine (p-Tb-o-Me-TAD). The synthesized material emits green light with the maximum wavelengths of 508 and 523 nm. p-Tb-o-Me-TAD shows excellent PLQY of 86.2% in solution state. When the synthesized material was used as a dopant in a device, TAD showed current efficiency (CE) of 17.71 cd/A and external quantum efficiency (EQE) of 6.11%. The device using p-Tb-o-Me-TAD dopant exhibited current efficiency (CE) of 24.24 cd/A and external quantum efficiency (EQE) of 7.27%.9,10-Dibromoanthracene(cas: 523-27-3Electric Literature of C14H8Br2) was used in this study.

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.Electric Literature of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Park, Sangshin; Kang, Seokwoo; Kwon, Hyukmin; Lee, Seungeun; Park, Jongwook published their research in Journal of Nanoscience and Nanotechnology in 2021. The article was titled 《Anthracene green fluorescent derivatives based on optimized side groups for highly efficient organic light-emitting diode emitters》.Name: 9,10-Dibromoanthracene The article contains the following contents:

Two green fluorescent materials, N,N,N′,N′-Tetra-o-tolyl-anthracene-9,10-diamine (o-Me-TAD) and N,N′-bis(2,5-dimethylphenyl)-N,N′-di-o-tolylanthracene-9,10-diamine (DMe-o-Me-TAD) including anthracene and diphenylamine moiety, were synthesized by Buchwald-Hartwig amination. In solution state, PL maximum wavelength of o-Me-TAD and DMe-o-Me-TAD is 518 nm and 520 nm. The doped device using o-Me-TAD as green fluorescent dopant exhibited CE of 19.78 cd/A and EQE of 5.97%. The doped device using DMe-o-Me-TAD as dopant exhibited CE of 22.37 cd/A and EQE of 7.02% without roll-off. Doped devices fabricated using o-Me-TAD and DMe-o-Me-TAD show the EL peaks at 522 and 523 nm corresponding to the Commission Internationale de L′Eclairage (CIE) coordinates of (0.29, 0.63) and (0.27, 0.61). The results came from multiple reactions, including the reaction of 9,10-Dibromoanthracene(cas: 523-27-3Name: 9,10-Dibromoanthracene)

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.Name: 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Electric Field-Induced Assembly in Single-Stacking Terphenyl Junctions》 was written by Tang, Yongxiang; Zhou, Yu; Zhou, Dahai; Chen, Yaorong; Xiao, Zongyuan; Shi, Jia; Liu, Junyang; Hong, Wenjing. Quality Control of 9,10-Dibromoanthracene And the article was included in Journal of the American Chemical Society in 2020. The article conveys some information:

Mol. assembly is crucial in functional mol. materials and devices. Among the mol. interactions that can form assemblies, stacking among π-conjugated mol. backbones plays an essential role in charge transport through organic materials and devices. The single-mol. junction technique allows for the application of an elec. field of approx. 108 V/m to the nanoscale junctions and to investigate the elec. field-induced assembly at the single-stacking level. Here, we demonstrate an elec. field-induced stacking effect between two mols. using the scanning tunneling microscope break junction (STM-BJ) technique and we found an increase in the stacking probability with increasing intensity of the elec. field. The combined d. functional theory (DFT) calculations suggest that the mols. become more planar under the elec. field, leading to the energetically preferred stacking configuration. Our study provides a new strategy for tuning mol. assembly by employing a strong elec. field. The experimental part of the paper was very detailed, including the reaction process of 9,10-Dibromoanthracene(cas: 523-27-3Quality Control 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%.Quality Control of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Hydrogen bonding induces dual porous types with microporous and mesoporous covalent organic frameworks based on Biscarbazole units》 was published in Microporous and Mesoporous Materials in 2020. These research results belong to Abuzeid, Hesham R.; El-Mahdy, Ahmed F. M.; Kuo, Shiao-Wei. HPLC of Formula: 6825-20-3 The article mentions the following:

Although the topologies of covalent organic frameworks (COFs) can be controlled mainly by varying the symmetries of the building blocks condensed to form the structures, another approach is to change the structures of blocks but retain the same symmetries. The construction of a single COF featuring pores of different sizes from two sym. building blocks remains extremely difficult. In this paper, we report an investigation into the effect of hydrogen bonding on the topol. regulation of two-dimensional COFs as a new approach for managing their properties. Our strategy involved introducing pristine and substituted diamine monomers-benzidine (BD) and 1,4-dihydroxybenzidine (DHBD)-into the skeleton of Biscarbazole-based COFs. The constructed Biscarbazole-based COFs, Cz-BD and Cz-DHBD, were designed using a (C2 + C2) geometry strategy and synthesized through Schiff-base condensations of Biscarbazole-4CHO and the benzidine derivatives The resulting COFs featured two different topologies: Cz-BD COF possessing a single type of pore having a tetragonal structure, and Cz-DHBD COF possessing a Kagome structure featuring two types of pores (one hexagonal and the other triangular with mesoporous and microporous structure, induced by intramol. OH···N hydrogen bonding). These COFs exhibited high crystallinity, great thermal stability, and large surface areas, as well as synergistic structural effects and high-performance CO2 uptake.3,6-Dibromo-9H-carbazole(cas: 6825-20-3HPLC of Formula: 6825-20-3) was used in this study.

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.HPLC of Formula: 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Quality Control of Methyltriphenylphosphonium bromideIn 2021 ,《Asymmetric Total Synthesis of Dankasterones A and B and Periconiastone A Through Radical Cyclization》 appeared in Angewandte Chemie, International Edition. The author of the article were Chen, Pengquan; Wang, Cheng; Yang, Rui; Xu, Hongjin; Wu, Jinghua; Jiang, Huanfeng; Chen, Kai; Ma, Zhiqiang. The article conveys some information:

We describe herein the assembly of the cis-decalin framework through radical cyclization initiated by metal-catalyzed hydrogen atom transfer (MHAT), further applied it in the asym. synthesis of dankasterones A and B and periconiastone A. Position-selective C-H oxygenation allowed for installation of the necessary functionality. A radical rearrangement was adopted to create 13(14→8)abeo-8-ergostane skeleton. Interconversion of dankasterone B and periconiastone A was realized through biomimetic intramol. aldol and retro-aldol reactions. The MHAT-based approach, serves as a new dissection means, is complementary to the conventional ways to establish cis-decalin framework. In the experiment, the researchers used many compounds, for example, Methyltriphenylphosphonium bromide(cas: 1779-49-3Quality Control of Methyltriphenylphosphonium bromide)

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.Quality Control of Methyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kim, Seunghyun; Kang, Seokwoo; Parkit, Jongwook published an article in 2021. The article was titled 《Synthesis and electro-optical property of green fluorescent emitter based on anthracene core and optimized side groups》, and you may find the article in Journal of Nanoscience and Nanotechnology.Reference of 9,10-Dibromoanthracene The information in the text is summarized as follows:

New green emitter is designed and synthesized by selecting anthracene having high photoluminescence quantum yield (PLQY) and diphenylamine side group substituted Me and t-Bu group: N9, N10-bis(5-(tert-butyl)-2-methylphenyl)-N9, N10-bis(2,4-dimethylphenyl)anthracene-9,10-diamine (3Me-1Bu-TPADA). Photophys., electrochem., and electroluminescent (EL) properties of 3Me-1Bu-TPADA were investigated. The maximum photoluminescence (PL) emission wavelengths of 3Me-1Bu-TPADA in solution and in a film were 528 nm and 531 nm, resp. 3Me-1Bu-TPADA has excellent thermal properties with glass transition temperatures (Tg) of 110 °C, melting temperatures (Tm) of 217 °C of, and degradation temperature (Tg) of 330 °C. 3Me-1Bu-TPADA was used as an emitting layer in non-doped devices: ITO/2-TNATA (60 nm)/NPB (15 nm)/3Me-1Bu-TPADA (30 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (200 nm). The 3Me-1Bu-TPADA device showed luminance efficiency of 6.05 cd/A, EQE of 2.68% at 10 mA/cm2. In the part of experimental materials, we found many familiar compounds, such as 9,10-Dibromoanthracene(cas: 523-27-3Reference 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%.Reference of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Song, Xianghai; Zhang, Xinyu; Wang, Mei; Li, Xin; Zhu, Zhi; Huo, Pengwei; Yan, Yongsheng published their research in Journal of Colloid and Interface Science in 2021. The article was titled 《Fabricating intramolecular donor-acceptor system via covalent bonding of carbazole to carbon nitride for excellent photocatalytic performance towards CO2 conversion》.Recommanded Product: 3,6-Dibromo-9H-carbazole The article contains the following contents:

Photocatalytic conversion of CO2 into hydrocarbon fuels is an ideal technol. of mitigating greenhouse effect caused by excessive emission of CO2. However, the high recombination rate of electron-hole pairs and limited charge carriers transport speed constrained the catalytic performance of many semiconductor catalysts. In this contribution, a series of carbon nitride (g-CN) samples with intramol. donor-acceptor (D-A) system were successfully prepared by introducing organic donor into their structures. Characterization results confirmed that carbazole was successful connected to the structure of g-CN via chem. bond. The formation of intramol. D-A system greatly enlarged the light response region of g-CN-xDbc. In addition, a new charge transfer transition mode was formed in g-CN-0.01Dbc due to the incorporation carbazole, which enable it to use light with energy lower than the intrinsic absorption of g-CN. Meanwhile, the D-A structure led to the spatial separation of electrons and holes in g-CN-xDbc and significantly decreased the recombination rate of electron-hole pairs. The g-CN-0.01Dbc presented the best catalytic performance and the CO evolution rate was 9.6 times higher than that of g-CN. Moreover, the reaction was performed in water without any additive, which made it green and sustainable. DFT simulation confirmed the D-A structure and charge carrier migration direction in the prepared samples. After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Recommanded Product: 3,6-Dibromo-9H-carbazole)

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.Recommanded Product: 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary