Category: 128-08-5

Removal of photoredox catalysts from polymers synthesized by organocatalyzed atom transfer radical polymerization was written by Chism, Katherine A.;Corbin, Daniel A.;Miyake, Garret M.. And the article was included in Journal of Polymer Science (Hoboken, NJ, United States) in 2022.Formula: C4H4BrNO2 This article mentions the following:

Organocatalyzed atom transfer radical polymerization (O-ATRP) is a method of producing polymers with precise structures under mild conditions using organic photoredox catalysts (PCs). Due to the unknown toxicity of PCs and their propensity to introduce color in polymers synthesized by this method, removal of the PC from the polymer product can be important for certain applications of polymers produced using O-ATRP. Current purification methods largely rely on precipitation to remove the PC from the polymer, but a more effective and efficient purification method is needed. In this work, an alternative purification method relying on oxidation of the PC to PC^閻? followed by filtration through a plug to remove PC^閻? from the polymer and removal of the volatiles was developed. A range of chem. oxidants and stationary phases were tested for their ability to remove PCs from polymers, revealing chem. oxidation by N-bromosuccinimide followed by a filtration through a silica plug can remove up to 99% of the PC from poly(Me methacrylate). Characterization of the polymer before and after purification demonstrated that polymer mol. weight, dispersity, and chain-end fidelity are not signficantly impacted by this purification method. Finally, this purification method was tested on a range of dihydrophenazine, phenoxazine, dihydroacridines, and phenothiazine PCs, revealing the strength of the chem. oxidant must match the oxidation potential of the PC for effective purification In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Formula: C4H4BrNO2).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon闂佺偨鍎茶ぐ绲﹐mine bond is electrophilic, i.e. alkyl bromides are alkylating agents. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Formula: C4H4BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Mn(III)-Porphyrin Immobilized on the Graphene Oxide-Magnetite Nanocomposite as an Efficient Heterogeneous Catalyst for the Epoxidation of Alkenes was written by Hajian, Robabeh;Bahrami, Elnaz. And the article was included in Catalysis Letters in 2022.Application of 128-08-5 This article mentions the following:

In this research, 灏?tetra-brominated meso-tetraphenylporphyrinatomanganese(III) acetate [MnTPPBr₄(OAc)] (MnPor) was anchored onto a magnetite imidazole-modified graphene oxide nanosheet (Fe₃O₄.GO.Im). The obtained catalyst (Fe₃O₄.GO.Im@MnPor) was characterized through Fourier transform IR (FT-IR) and diffuse reflectance UV-Visible spectrophotometry (DR UV-Vis), powder X-ray diffractometry (XRD), field emission SEM (FESEM), energy dispersive X-ray (EDX) spectroscopy, thermogravimetric anal. (TGA) and at. absorption spectroscopy. The characterization was performed to determine the amount of manganese porphyrin loaded on the GO support. The new immobilized catalyst was employed for the efficient epoxidation of different alkenes with urea hydrogen peroxide (UHP) and acetic acid (HOAc) as oxidant activators under mild conditions. Olefins were oxidized efficiently to their corresponding epoxide with 63-100% selectivity in the presence of Fe₃O₄.GO.Im@MnPor. Moreover, an remarkable turnover frequency (93) was achieved for the oxidation of 浼?pinene. The graphene oxide-bound Mn-porphyrin was recovered from the reaction mixture by magnetic decantation and reused several times. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Application of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon鑱砨romine bond is electrophilic in nature. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Application of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Photoswitchable Diazocine-Based Estrogen Receptor Agonists: Stabilization of the Active Form inside the Receptor was written by Ewert, Julia;Heintze, Linda;Jorda-Redondo, Mireia;von Glasenapp, Jan-Simon;Nonell, Santi;Bucher, Goetz;Peifer, Christian;Herges, Rainer. And the article was included in Journal of the American Chemical Society in 2022.HPLC of Formula: 128-08-5 This article mentions the following:

Photopharmacol. is an emerging approach in drug design and pharmacol. therapy. Light is used to switch a pharmacophore between a biol. inactive and an active isomer with high spatiotemporal resolution at the site of illness, thus potentially avoiding side effects in neighboring healthy tissue. The most frequently used strategy to design a photoswitchable drug is to replace a suitable functional group in a known bioactive mol. with azobenzene. Our strategy is different in that the photoswitch moiety is closer to the drug閳ョ灚 scaffold. Docking studies reveal a very high structural similarity of natural 17灏?estradiol and the E isomers of dihydroxy diazocines, but not their Z isomers, resp. Seven dihydroxy diazocines were synthesized and subjected to a biol. estrogen reporter gene assay. Four derivatives exhibit distinct estrogenic activity after irradiation with violet light, which can be shut off with green light. Most remarkably, the photogenerated, active E form of one of the active compounds isomerizes back to the inactive Z form with a half-life of merely several milliseconds in water, but nevertheless is active for more than 3 h in the presence of the estrogen receptor. The results suggest a significant local impact of the ligand-receptor complex toward back-isomerization. Thus, drugs that are active when bound but lose their activity immediately after leaving the receptor could be of great pharmacol. value because they strongly increase target specificity. Moreover, the drugs are released into the environment in their inactive form. The latter argument is particularly important for drugs that act as endocrine disruptors. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5HPLC of Formula: 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.HPLC of Formula: 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Effect of Electron-Withdrawing Chlorine Substituent on Morphological and Photovoltaic Properties of All Chlorinated D-A-Type Quinoxaline-Based Polymers was written by Lee, Seok Woo;Shin, Hee Jeong;Park, Byoungwook;Shome, Sanchari;Whang, Dong Ryeol;Bae, Hyemin;Chung, Sein;Cho, Kilwon;Ko, Seo-Jin;Choi, Hyosung;Chang, Dong Wook. And the article was included in ACS Applied Materials & Interfaces in 2022.Related Products of 128-08-5 This article mentions the following:

The choice of the chlorine (Cl) atom as an electron-withdrawing substituent in conjugated polymers leads to a higher potential in the commercialization of polymer solar cells than its fluorine counterpart because of the versatility and cost-effectiveness of the chlorination process. In addition, the population and location of Cl substituents can significantly influence the photovoltaic characteristics of polymers. In this study, three chlorinated quinoxaline-based polymers were invented to examine the numerical and positioning effects of the Cl atom on their photovoltaic characteristics. The number of Cl substituents in the reference polymer, PBCl-Qx, was adjusted to three: two Cl atoms in the benzodithiophene-type D unit and one Cl atom in the quinoxaline-type A unit. Subsequently, two more Cl atoms were selectively introduced at the 4- and 5-positions of the alkylated thiophene moieties at the 2,3-positions of the quinoxaline moiety in PBCl-Qx to obtain the addnl. polymers PBCl-Qx4Cl and PBCl-Qx5Cl, resp. The conventional PBCl-Qx4Cl device exhibited a better power conversion efficiency (PCE) of 12.95% as compared to those of PBCl-Qx (12.44%) and PBCl-Qx5Cl (11.82%) devices. The highest PCE of the device with PBCl-Qx4Cl was ascribed to an enhancement in the open-circuit voltage and fill factor induced by the deeper energy level of the HOMO and the favorable morphol. features in its blended film with Y6. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Related Products of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Related Products of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Near-infrared non-fused ring acceptors with light absorption up to 1000 nm for efficient and low-energy loss organic solar cells was written by Luo, Dou;Zhang, Yuniu;Li, Lanqing;Shan, Chengwei;Liu, Qian;Wang, Zhaojin;Choy, Wallace C. H.;Kyaw, Aung Ko Ko. And the article was included in Materials Today Energy in 2022.Related Products of 128-08-5 This article mentions the following:

It is challenging to afford both high-performance and low-energy loss (Eloss) organic solar cells (OSCs) based on near-IR (NIR) non-fused ring electron acceptors (NFREAs) with ultra-narrow bandgap. Herein, three simple NFREAs (C6OT-4F, C6EDOT-4F and PDOT-4F) with absorption up to 1000 nm are developed by using alkoxy substituted thiophene derivatives core connected to fluorinated 1,1-dicyanomethylene-3-indanone (DFIC) terminals through 4H-cyclopenta[1,2-b:5,4-b]dithiophene (CPDT) bridge. It is found that fine tuning central thiophene derivatives can surprisingly lead to different photoelec. properties and the device performances. Compared with C6EDOT-4F and PDOT-4F, C6OT-4F shows a blue-shifted absorption and an elevated LUMO level, which is beneficial for boosting Voc. As a result, optimal devices based on PTB7-Th:C6OT-4F achieve a preferable efficiency of 9.83% with a low Eloss of 0.47 eV, which is the lowest Eloss among the NFREA-based OSCs with PCE >9% and optoelectronic response over 1000 nm. This work portrays the design concept of ultra-narrow bandgap NFREAs for efficient OSCs as well as low energy loss and exploration of semitransparent photoelec. devices. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Related Products of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon閳ユ彽romine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Related Products of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The Role of Long-Alkyl-Group Spacers in Glycolated Copolymers for High-Performance Organic Electrochemical Transistors was written by Tan, Ellasia;Kim, Jingwan;Stewart, Katherine;Pitsalidis, Charalampos;Kwon, Sooncheol;Siemons, Nicholas;Kim, Jehan;Jiang, Yifei;Frost, Jarvist M.;Pearce, Drew;Tyrrell, James E.;Nelson, Jenny;Owens, Roisin M.;Kim, Yun-Hi;Kim, Ji-Seon. And the article was included in Advanced Materials (Weinheim, Germany) in 2022.Reference of 128-08-5 This article mentions the following:

Semiconducting polymers with oligoethylene glycol (OEG) sidechains have attracted strong research interest for organic electrochem. transistor (OECT) applications. However, key mol. design rules for high-performance OECTs via efficient mixed electronic/ionic charge transport are still unclear. In this work, new glycolated copolymers (gDPP-TTT and gDPP-TTVTT) with diketopyrrolopyrrole (DPP) acceptor and thiophene (T) and vinylene (V) thiophene-based donor units are synthesized and characterized for accumulation mode OECTs, where a long-alkyl-group (C₁₂) attached to the DPP unit acts as a spacer distancing the OEG groups from the polymer backbone. gDPP-TTVTT shows the highest OECT transconductance (61.9 S cm^-1) and high operational stability, compared to gDPP-TTT and their alkylated counterparts. Surprisingly, gDPP-TTVTT also shows high electronic charge mobility in a field-effect transistor, suggesting efficient ion injection/diffusion without hindering its efficient electronic charge transport. The elongated donor unit (TTVTT) facilitates hole polaron formation to be more localized to the donor unit, leading to faster and easier polaron formation with less impact on polymer structure during OECT operation, as opposed to the TTT unit. This is supported by mol. dynamics simulation. These simultaneously high electronic and ionic charge-transport properties are achieved due to the long-alkyl-group spacer in amphipathic sidechains, providing an important mol. design rule for glycolated copolymers. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Reference of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Reference of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

High-Temperature and Dynamic RGB (Red-Green-Blue) Long-Persistent Luminescence in an Anti-Kasha Organic Compound was written by Zhang, Qiang-Sheng;Wang, Shi-Cheng;Xiong, Xiao-Hong;Fu, Peng-Yan;Zhang, Xiao-Dong;Fan, Ya-Nan;Pan, Mei. And the article was included in Angewandte Chemie, International Edition in 2022.Application of 128-08-5 This article mentions the following:

Organic LPL (long-persistent luminescence) materials have sparked extensive research interest due to the ultralong-lived triplet states. Although numerous organic LPL materials were reported, most of the triplet emission was static and monotonous. LPL materials with dynamic triplet emission are urgently required. 2,4,6-Tris(diphenylamino)-1,3,5-triazine (1) with dynamic long-persistent luminescence (LPL) was fabricated. The single-crystal structure shows that the abundant intermol. interactions and small free volume restrict the mol. motion and avoid the quenchers. Spectral and theor. calculations upheld the existence of multiple excited states in 1, and the migration of electrons between multiple excited states is sensitive to external stimuli. By modulating the stimulus, the residence of electrons in different triplet states can be manipulated to achieve RGB LPL. Blue LPL was achieved by manipulating the anti-Kasha emission. The red LPL can still be observed at high temperature In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Application of 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon鑱砨romine bond is electrophilic in nature. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Application of 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Electrochemically stable carbazole-derived polyaniline for pseudocapacitors was written by Almtiri, Mohammed;Dowell, Timothy J.;Giri, Hari;Wipf, David O.;Scott, Colleen N.. And the article was included in ACS Applied Polymer Materials in 2022.HPLC of Formula: 128-08-5 This article mentions the following:

Supercapacitor energy storage devices are well suited to meet the rigorous demands of future portable consumer electronics (PCEs) due to their high energy and power densities (i.e., longer battery-life and rapid charging, resp.) and superior operational lifetimes (10 times greater than lithium-ion batteries). To date, research efforts have been narrowly focused on improving the specific capacitance of these materials; however, emerging technologies are increasingly demanding competitive performance with regards to other criteria, including scalability of fabrication and electrochem. stability. In this regard, we developed a polyaniline (PANI) derivative that contains a carbazole unit copolymerized with 2,5-dimethyl-p-phenylenediamine (Cbz-PANI-1) and determined its optoelectronic properties, elec. conductivity, processability, and electrochem. stability. Importantly, the polymer exhibits good solubility in various solvents, which enables the use of scalable spray-coating and drop-casting methods to fabricate electrodes. Cbz-PANI-1 was used to fabricate electrodes for supercapacitor devices that exhibits a maximum areal capacitance of 64.8 mF cm^-2 and specific capacitance of 319 F g^-1 at a c.d. of 0.2 mA cm^-2. Moreover, the electrode demonstrates excellent cyclic stability (閳?83% of capacitance retention) over 1000 CV cycles. Addnl., we demonstrate the charge storage performance of Cbz-PANI-1 in a sym. supercapacitor device, which also exhibits excellent cyclic stability (閳?91% of capacitance retention) over 1000 charge-discharge cycles. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5HPLC of Formula: 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon鑱砨romine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.HPLC of Formula: 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Location effect of triptycene on the photovoltaic performance of carbazole-based dyes was written by Yan, Mao;Zhu, Yi-Zhou;Yan, Yi-Qiao;Wang, Qun-Hui;Yin, Guan-Lin;Zheng, Jian-Yu. And the article was included in Journal of Photochemistry and Photobiology, A: Chemistry in 2022.SDS of cas: 128-08-5 This article mentions the following:

Due to the unique three-dimensional spatial structure and special electronic properties, triptycene has been applied in dye-sensitized solar cells. Herein, two dyes JY76/JY77 featuring triptycene at the different substitution position of carbazole donor have been synthesized, and location effect of triptycene on the photovoltaic performance of devices has been investigated. Lateral derived triptycene endows JY77 much more enhanced capability of impeding the interface charge recombination than JY76 which triptycene was decorated at terminal. Finally, JY77-sensitized solar cells exhibit around 20% higher power conversion efficiency (PCE) than that of JY76. The photovoltaic properties are further tuned by co-sensitization strategy, and better PCEs are obtained. Under AM 1.5G irradiation, cells fabricated by the synergic adsorption of JY77 and JY75, achieve the highest PCE of 8.01%. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5SDS of cas: 128-08-5).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.SDS of cas: 128-08-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis and Electrochemical Properties of Donor-Acceptor-Conjugated Polymers Based on Carbazole-EDOT Derivatives with Different Electron-Withdrawing Groups was written by Liu, Junlei;Hou, Weiwei;Xu, Ruoteng;Gao, Yijing;Xu, Lintie;Jiang, Linxiang;Zhang, Cheng. And the article was included in ACS Applied Polymer Materials in 2022.Application In Synthesis of 1-Bromopyrrolidine-2,5-dione This article mentions the following:

A series of donor (D)-acceptor (A)-conjugated monomers (ECzE-NB and ECzE-AQ) were designed and synthesized by EDOT-carbazole-EDOT (ECzE) acting as a donor (D) and anthraquinone (AQ) and nitrobenzene (NB) acting as acceptors (A) in this study. The corresponding polymer films (PECzE, PECzE-NB, and PECzE-AQ) were obtained by electrochem. polymerization, and then the effects of different acceptors on the structure and electrochem. performance of the polymers were studied. Through NMR, mass spectrometry (MS), and Fourier transform IR spectroscopy (FT-IR), it was proved that the monomers were successfully synthesized. The results of the electrochem. performance test illustrated that the electrochem. behavior of PECzE was a typical nondiffusion-controlled process. When the c.d. was 0.1 mA/cm², the specific capacity of PECzE was 8.41 mF/cm² with a rather good rate performance. However, the electrochem. behaviors of PECzE-NB and PECzE-AQ were different from that of PECzE owing to the ability of hole injection and spatial structures of the monomers changed by introducing electron-withdrawing groups. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5Application In Synthesis of 1-Bromopyrrolidine-2,5-dione).

1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Application In Synthesis of 1-Bromopyrrolidine-2,5-dione

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary