Category: 7789-45-9

《Double-external-field enables bulk controlled radical polymerization with narrow molecular weight distribution at high conversion》 was written by Bian, Chao; Zhou, Yin-Ning; Luo, Zheng-Hong. Application of 7789-45-9 And the article was included in AIChE Journal in 2020. The article conveys some information:

To control over mol. weight and its distribution in bulk controlled radical polymerization (CRP) at high conversion remains a challenge. Currently, there are few reports about bulk CRP regulated by external field. In this work, a new strategy combining external fields of light and ultrasound, namely double-external-field, is reported to overcome the challenge. Light irradiation directly reduces the deactivator CuIIBr2/L in the presence of free amine ligand, while ultrasonic agitation improves the homogeneity of the system and moderates the diffusional limitations on activation-deactivation and termination processes. Bulk polymerizations of Me acrylate (MA) were conducted in a controlled manner at conversion over 90%, producing PMA with low dispersities (D = 1.05-1.07) and good retention of chain-end functionality (77%). In addition, good control over the polymerizations for Me methacrylate (MMA) and styrene was obtained, although the chain-end functionality of PMMA-Br requires further improvement. It is believed that this as-developed double-external-field regulation strategy is also applicable to other light induced bulk RDRP systems to improve the controllability. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Application of 7789-45-9)

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Application of 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

In 2019,Organic Letters included an article by Ren, Hai; Song, Jun-Rong; Li, Zhi-Yao; Pan, Wei-Dong. HPLC of Formula: 7789-45-9. The article was titled 《Oxazoline-/Copper-Catalyzed Alkoxyl Radical Generation: Solvent-Switched to Access 3a,3a’-Bisfuroindoline and 3-Alkoxyl Furoindoline》. The information in the text is summarized as follows:

We report the first example of oxazoline-/copper-catalyzed alc. oxidation to generate the alkoxyl radical under additive-free conditions. The resulting alkoxyl radical addition to alkene enables useful C-O bond-forming and selective C(sp3)-C(sp3) radical-radical dimerization/radical-trapping reactions, providing direct access to the 3a,3a’-bisfuro[2,3-b]indoline scaffold for the first time and a wide range of 3-alkoxyl furoindolines with high efficiency. In addition to this study using Cupric bromide, there are many other studies that have used Cupric bromide(cas: 7789-45-9HPLC of Formula: 7789-45-9) was used in this study.

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.HPLC of Formula: 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

In 2019,Langmuir included an article by Kang, Hyeongeun; Jeong, Wonwoo; Hong, Daewha. Application of 7789-45-9. The article was titled 《Antifouling Surface Coating Using Droplet-Based SI-ARGET ATRP of Carboxybetaine under Open-Air Conditions》. The information in the text is summarized as follows:

The formation of a dense zwitterionic brush through surface-initiated atom transfer radical polymerization (SI-ATRP) is a typical graft-from approach used to achieve antifouling surfaces with high fidelity; however, their air-tightness may cause inconvenience to users. In this context, activator regenerated by electron transfer (ARGET) ATRP is emerging as an alternative surface-coating tool because limited amount of air is allowed to form a dense polymer brush. However, the degree of air tolerance that can ensure a thick polymer brush has not been clearly defined, limiting its practical usage under ambient-air conditions. In this study, we investigated the SI-ARGET ATRP of carboxybetaine (CB) by changing the air conditions, along with the air-related parameters, such as the concentration of the reducing agent, the volume of the polymerization solution (PS), or the solvent composition, and correlated their effects with the poly(CB) thickness. Based on the optimized reaction conditions, a poly(CB) brush with reliable thickness was feasibly formed even under open-air conditions without a degassing step. In addition, a microliter droplet (∼100 μL) of PS was sufficient to proceed with the SI-ARGET ATRP for the covering of a poly(CB) brush on the surface area of interest. By applying an optimized SI-ARGET ATRP of CB, antifouling was feasibly achieved in the surface region of interest using an array to form a large surface area under fully exposed air conditions. In other words, optimized SI-ARGET ATRP enabled the formation of a thick poly(CB) brush on the surfaces of various dimensions under open-air conditions. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Application of 7789-45-9)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Application of 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

The author of 《Electrochemically Mediated Atom Transfer Radical Polymerization of Methyl Methacrylate: The Importance of Catalytic Halogen Exchange》 were De Bon, Francesco; Isse, Abdirisak A.; Gennaro, Armando. And the article was published in ChemElectroChem in 2019. Formula: Br2Cu The author mentioned the following in the article:

Electrochem. mediated atom transfer radical polymerization (eATRP) of Me methacrylate (MMA) was studied in 1-butyl-3-methylimidazolium triflate ([BMIm][OTf]) and ethanol. When 2-bromopropionitrile and Et 2-bromoisobutyrate were used as initiators, poorly controlled or uncontrolled polymerizations yielding polymers with mol. weights largely exceeding the theor. values were obtained. Poor control was attributed to a reactivity mismatch between initiator and dormant species, which was successfully suppressed by combining eATRP with catalytic halogen exchange. Well-defined polymers (Mn greater than 30000 and D less than 1.2) were obtained in both solvents under optimized conditions. The possibility of using PMDETA as an inexpensive ligand in combination with Et α-bromophenylacetate as initiator was also successful. Good chain-end fidelity during eATRP was confirmed by chain extension of PMMA-Cl macroinitiator with MMA in ethanol. Polymers prepared in both solvents were found to be mainly syndiotactic, without any solvent effect on tacticity. After reading the article, we found that the author used Cupric bromide(cas: 7789-45-9Formula: Br2Cu)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Formula: Br2Cu

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

《Induced high selectivity methanol formation during CO2 hydrogenation over a CuBr2-modified CuZnZr catalyst》 was published in Journal of Catalysis in 2020. These research results belong to Chen, Shuyao; Zhang, Junfeng; Song, Faen; Zhang, Qingde; Yang, Guohui; Zhang, Meng; Wang, Xiaoxing; Xie, Hongjuan; Tan, Yisheng. Recommanded Product: Cupric bromide The article mentions the following:

Developing catalysts with high activity and high selectivity toward methanol, and elucidating the structure-activity relationship, are important in the area of CO2 hydrogenation. Herein, a simple ultrasonic-assisted impregnation modification method, which modifies a CuZnZr catalyst for methanol synthesis from CO2, is reported. The results show high methanol selectivity (97.1%) and a CO2 conversion of 10.7%, in the presence of the catalyst modified with CuBr2 (CuZnZr/CuBr2). Furthermore, detailed investigations of the structure-activity relationship demonstrate that the CuBr2 modification influences both the catalyst surface properties and catalyst morphol. In particular, residual Br, as a CuBr phase, is stabilized on the catalyst surface and is able to significantly passivate the reverse water-gas shift activity on the Cu surface; therefore, CO formation on the Cu surface is almost completely suppressed. The catalytic evaluation and IR data support the formate pathway mechanism in the presence of the CuZnZr/CuBr2 catalyst to synthesize methanol from CO2. In the part of experimental materials, we found many familiar compounds, such as Cupric bromide(cas: 7789-45-9Recommanded Product: Cupric bromide)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Recommanded Product: Cupric bromide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

The author of 《Ultra-low volume oxygen tolerant photoinduced Cu-RDRP》 were Liarou, Evelina; Anastasaki, Athina; Whitfield, Richard; Iacono, Carmelo E.; Patias, Georgios; Engelis, Nikolaos G.; Marathianos, Arkadios; Jones, Glen R.; Haddleton, David M.. And the article was published in Polymer Chemistry in 2019. Category: copper-catalyst The author mentioned the following in the article:

We introduce the first oxygen tolerant ultra-low volume (as low as 5μL total reaction volume) photoinduced copper-RDRP of a wide range of hydrophobic, hydrophilic and semi-fluorinated monomers including lauryl and hexyl acrylate, poly(ethylene glycol Me ether acrylate) and trifluoroethyl (meth)acrylates. In the absence of any external deoxygenation, well-defined homopolymers can be obtained with low dispersity values, high end-group fidelity and near-quant. conversions. Block copolymers can be efficiently synthesized in a facile manner and the compatibility of the system to larger scale polymerizations (up to 0.5 L) is also demonstrated by judiciously optimizing the reaction conditions. Importantly, the online monitoring of oxygen consumption was also conducted through an oxygen probe and the role of each component is identified and discussed. In the part of experimental materials, we found many familiar compounds, such as Cupric bromide(cas: 7789-45-9Category: copper-catalyst)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Category: copper-catalyst

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Reference of Cupric bromideIn 2019 ,《Effect of Polymerization Components on Oxygen-Tolerant Photo-ATRP》 appeared in ACS Macro Letters. The author of the article were Rolland, Manon; Whitfield, Richard; Messmer, Daniel; Parkatzidis, Kostas; Truong, Nghia P.; Anastasaki, Athina. The article conveys some information:

Photo-ATRP has recently emerged as a powerful technique that allows for oxygen-tolerant polymerizations and the preparation of polymers with low dispersity and high end-group fidelity. However, the effect of various photo-ATRP components on oxygen consumption and polymerization remains elusive. Herein, we employ an in situ oxygen probe and UV-vis spectroscopy to elucidate the effects of ligand, initiator, monomer, and solvent on oxygen consumption. We found that the choice of photo-ATRP components significantly impacts the rate at which the oxygen is consumed and can subsequently affect both the polymerization time and the dispersity of the resulting polymer. Importantly, we discovered that using the inexpensive ligand TREN results in the fastest oxygen consumption and shortest polymerization time, even though no appreciable reduction of CuBr2 is observed This work provides insight into oxygen consumption in photo-ATRP and serves as a guideline to the judicious selection of photo-ATRP components for the preparation of well-defined polymers.Cupric bromide(cas: 7789-45-9Reference of Cupric bromide) was used in this study.

Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Reference of Cupric bromide

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Related Products of 7789-45-9In 2019 ,《Temperature-controlled orientation of proteins on temperature-responsive grafted polymer brushes: Poly(butyl methacrylate) vs poly(butyl acrylate): Morphology, wetting, and protein adsorption》 was published in Biomacromolecules. The article was written by Awsiuk, Kamil; Stetsyshyn, Yurij; Raczkowska, Joanna; Lishchynskyi, Ostap; Dabczynski, Pawel; Kostruba, Andrij; Ohar, Halyna; Shymborska, Yana; Nastyshyn, Svyatoslav; Budkowski, Andrzej. The article contains the following contents:

Poly(Bu methacrylate) (PBMA) or poly(Bu acrylate) (PBA)-grafted brush coatings attached to glass were successfully prepared using atom-transfer radical polymerization “”from the surface””. The thicknesses and composition of the PBMA and PBA coatings were examined using ellipsometry and time-of-flight secondary ion mass spectrometry (ToF-SIMS), resp. For PBMA, the glass-transition temperature constitutes a range close to the physiol. limit, which is in contrast to PBA, where the glass-transition temperature is around -55 °C. Atomic force microscopy studies at different temperatures suggest a strong morphol. transformation for PBMA coatings, in contrast to PBA, where such essential changes in the surface morphol. are absent. Besides, for PBMA coatings, protein adsorption depicts a strong temperature dependence. The combination of bovine serum albumin and anti-IgG structure anal. with the principal component anal. of ToF-SIMS spectra revealed a different orientation of proteins adsorbed to PBMA coatings at different temperatures In addition, the biol. activity of anti-IgG mols. adsorbed at different temperatures was evaluated through tracing the specific binding with goat IgG. In the part of experimental materials, we found many familiar compounds, such as Cupric bromide(cas: 7789-45-9Related Products of 7789-45-9)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Related Products of 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Electric Literature of Br2CuIn 2020 ,《Surface-grafted polyacrylonitrile brushes with aggregation-induced emission properties》 was published in Polymer Chemistry. The article was written by Kopec, Maciej; Pikiel, Marcin; Vancso, G. Julius. The article contains the following contents:

Polyacrylonitrile (PAN) was synthesized and grafted from silicon wafers by copper-mediated photoinduced atom transfer radical polymerization (ATRP) using α-bromophenyl acetic acid-based initiators. Aggregation-induced photonic emission (AIE) was observed in well-defined, low mol. weight (Mn < 10k) bulk PAN as well as in thin (d < 15 nm), surface-grafted polymer brushes. In the experimental materials used by the author, we found Cupric bromide(cas: 7789-45-9Electric Literature of Br2Cu)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Electric Literature of Br2Cu

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

In 2019,ACS Macro Letters included an article by Wang, Zhenhua; Lorandi, Francesca; Fantin, Marco; Wang, Zongyu; Yan, Jiajun; Wang, Zhanhua; Xia, Hesheng; Matyjaszewski, Krzysztof. SDS of cas: 7789-45-9. The article was titled 《Atom Transfer Radical Polymerization Enabled by Sonochemically Labile Cu-carbonate Species》. The information in the text is summarized as follows:

Atom transfer radical polymerization (ATRP) has been previously mediated by ultrasound using a low concentration of copper complex in water (sono-ATRP) or by addition of piezoelec. materials in organic solvents (mechano-ATRP). However, these procedures proceeded slowly and yielded polymers contaminated by new chains initiated by hydroxyl radicals or by residual piezoelecs. Unexpectedly, in the presence of sodium carbonate, rapid sono-ATRP of Me acrylate in DMSO was achieved (80% conversion in <2 h) with excellent control of mol. weights and low dispersities (Mw/Mn < 1.2). The in situ formed CuII/L-CO3 complex in the presence of ultrasound generated CuI/L species as activators for ATRP and carbonate radical anions. The latter were scavenged by DMSO that was oxidized to di-Me sulfone. This simple and robust process employs low-intensity ultrasound, air-stable CuII/L catalysts, and carbonate or bicarbonate salts (washing soda or baking soda) to prepare well-defined polyacrylates. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9SDS of cas: 7789-45-9)

Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.SDS of cas: 7789-45-9

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”