Category: 576-83-0

Liu, Zhang; Deng, Chao; Su, Liwu; Wang, Dan; Jiang, Yongshi; Tsuboi, Taiju; Zhang, Qisheng published the artcile< Efficient Intramolecular Charge-Transfer Fluorophores Based on Substituted Triphenylphosphine Donors>, Computed Properties of 576-83-0, the main research area is efficient intramol charge transfer fluorophore substituted triphenylphosphine donor; intramolecular charge transfer; non-radiative decay; organic light emitting diodes; thermally activated delayed fluorescence; triphenylphosphine donor.

Triphenylphosphine (TPP)-based luminescent compounds are rarely investigated because of the low photoluminescence quantum yield (PLQY). Here, we demonstrate that introducing steric hindrance groups to the TPP moiety and separating the orbitals involved in the transition can drastically suppress the non-radiative decay induced by structural distortion of TPP in the excited state. High PLQY up to 0.89 as well as thermally activated delayed fluorescence are observed from the intramol. charge-transfer (ICT) mols. with substituted TPP donors (sTPPs) in doped films. The red organic light-emitting diodes employing these emitters achieve comparable external quantum efficiencies to the control device containing a classical phosphorescent dye, revealing the great potential of the ICT emitters based on electrochem. stable sTPPs.

Angewandte Chemie, International Edition published new progress about Band structure. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Computed Properties of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Patnaik, Sai Gourang; Jayakumar, Tejkiran Pindi; Sawamura, Yukihiro; Matsumi, Noriyoshi published the artcile< Defined Poly(borosiloxane) as an Artificial Solid Electrolyte Interphase Layer for Thin-Film Silicon Anodes>, Computed Properties of 576-83-0, the main research area is LIB defined polyborosiloxane artificial SEI silicon anode.

Solid electrolyte interphase (SEI) formation in Li-ion batteries is essential for good long-term performance of the cell. However, for electrodes exhibiting high volume expansion (like Si and Sn), continuous SEI formation can not only deplete electrolyte content but also increase cell impedance and hence mediocre performance. This is particularly detrimental in the case of thin-film electrodes where there is a minute amount of active materials loading. In the current work, defined poly(borosiloxane) (PBS) as an artificial polymeric SEI having self-healing, anion-trapping properties, and electron-deficient boron moiety is investigated. Studies on thin-film Si electrodes show excellent enhancement with polymeric coating in terms of cycling stability. These improvements are attributed to a combination of factors including the anion-trapping effect of tricoordinate boron, self-healing ability of PBS, and adherence to the electrode surface.

ACS Applied Energy Materials published new progress about Battery anodes. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Computed Properties of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Xu, Guolin; Gao, Peng; Colacot, Thomas J. published the artcile< Tunable Unsymmetrical Ferrocene Ligands Bearing a Bulky Di-1-adamantylphosphino Motif for Many Kinds of Csp2-Csp3 Couplings>, Name: 2,4,6-Trimethylbromobenzene, the main research area is adamantyl phosphino linked ferrocene ligand preparation palladium complex; Murahashi Feringa Kumada Corriu Negishi Suzuki Miyaura coupling reaction.

A class of ferrocene-based unsym. bidentate ligands containing a di(1-adamantyl)phosphino group, Fc(PAd2)(PR2) (R = Ph, Cy, iPr, tBu) abbreviated as MPhos ligands, and their corresponding (MPhos)PdCl2 pre-catalysts were synthesized in very good yields and fully characterized using techniques including single-crystal X-ray crystallog. These pre-catalysts were utilized for Csp2-Csp3 couplings for many kinds of name reactions such as Murahashi-Feringa, Kumada-Corriu, Negishi, and Suzuki-Miyaura with good substrate scope and isolated yields. About nine “”drug-like”” mols. were also tested successfully to demonstrate their potential applications in active pharmaceutical ingredient (API) synthesis. The tunability of the catalyst system enabled the matching of sterics and electronics of the ligand with that of the substrates to have desirable results for over five dozen systems in good yields and selectivity.

ACS Catalysis published new progress about Adamantanes Role: CAT (Catalyst Use), SPN (Synthetic Preparation), USES (Uses), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Name: 2,4,6-Trimethylbromobenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Cao, Qun; Nicholson, William I.; Jones, Andrew C.; Browne, Duncan L. published the artcile< Robust Buchwald-Hartwig amination enabled by ball-milling>, Category: bromides-buliding-blocks, the main research area is arylhalide secondary amine Buchwald Hartwig amination palladium ball milling.

An operationally simple mechanochem. method for the Pd catalyzed Buchwald-Hartwig amination of arylhalides with secondary amines has been developed using a Pd PEPPSI catalyst system. The system is demonstrated on 30 substrates and applied in the context of a target synthesis. Furthermore, the performance of the reaction under aerobic conditions has been probed under traditional solution and mechanochem. conditions, the observations are discussed herein.

Organic & Biomolecular Chemistry published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Isoda, Motoyuki; Uetake, Yuta; Takimoto, Tadashi; Tsuda, Junpei; Hosoya, Takamitsu; Niwa, Takashi published the artcile< Convergent Synthesis of Fluoroalkenes Using a Dual-Reactive Unit>, Electric Literature of 576-83-0, the main research area is aryl bromide arylboronicacid palladium catalyst chemoselective reaction; fluoroalkene preparation.

For the synthesis of diverse fluoroalkenes, a dual-reactive C2-unit, (Z)-1-boryl-1-fluoro-2-tosyloxyethene, containing nucleophilic and electrophilic moieties method was developed. Consecutive palladium-catalyzed cross-coupling reactions of this unit with aryl bromides and aryl boronic acids allow for the convergent synthesis of diverse trans-1,2-diaryl-substituted fluoroethenes in a chemoselective and stereoretentive manner.

Journal of Organic Chemistry published new progress about Alkylation, chemoselective. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Electric Literature of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Shon, Jong-Hwa; Kim, Dooyoung; Rathnayake, Manjula D.; Sittel, Steven; Weaver, Jimmie; Teets, Thomas S. published the artcile< Photoredox catalysis on unactivated substrates with strongly reducing iridium photosensitizers>, HPLC of Formula: 576-83-0, the main research area is aryl halide alkyl hydrodehalogenation iridium photocatalyst.

In this work, the strong bis-cyclometalated iridium photoreductants with electron-rich β-diketiminate (NacNac) ancillary ligands enable high-yielding photoredox transformations of challenging substrates with very simple reaction conditions that require only a single sacrificial reagent. Using blue or green visible-light activation a variety of reactions, which include hydrodehalogenation, cyclization, intramol. radical addition, and prenylation via radical-mediated pathways, with optimized conditions that only require the photocatalyst and a sacrificial reductant/hydrogen atom donor were demonstrated. Many of these reactions involve organobromide and organochloride substrates RX (R = 3-methoxyphenyl, 4-cyanophenyl, {1-[(benzyloxy)carbonyl]piperidin-4-yl}, etc.; X = Br, Cl) which in the past have had limited utility in photoredox catalysis. This work paves the way for the continued expansion of the substrate scope in photoredox catalysis.

Chemical Science published new progress about Alkanes Role: SPN (Synthetic Preparation), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, HPLC of Formula: 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Zi-Yuan; Dai, Ya-Zhong; Ding, Li; Dong, Bo-Wei; Jiang, Shang-Da; Wang, Jie-Yu; Pei, Jian published the artcile< A Stable Triplet-Ground-State Conjugated Diradical Based on a Diindenopyrazine Skeleton>, Formula: C9H11Br, the main research area is indenopyrazine stable triplet ground state conjugated diradical; conjugated radicals; high-spin; pyrazine; singlet-triplet gap; stable radicals.

High-spin conjugated radicals have great potential in magnetic materials and organic spintronics. However, to obtain high-spin conjugated radicals is still quite challenging due to their poor stability. We report the successful synthesis and isolation of a stable triplet conjugated diradical, 10,12-diaryldiindeno[1,2-b:2′,1′-e]pyrazine (m-DIP, I, Ar = mesityl, substituted 9-anthryl). With the m-xylylene analog skeleton containing electron-deficient sp2-nitrogen atoms, m-DIP displays significant aromatic character within its pyrazine ring and its spin d. mainly delocalizes on the meta-pyrazine unit, making it a triplet ground state conjugated diradical. Our work provides an effective “”spin d. tuning”” strategy for stable high-spin conjugated radicals.

Angewandte Chemie, International Edition published new progress about Amphoteric materials. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Larsen, Matthew A.; Oeschger, Raphael J.; Hartwig, John F. published the artcile< Effect of Ligand Structure on the Electron Density and Activity of Iridium Catalysts for the Borylation of Alkanes>, Recommanded Product: 2,4,6-Trimethylbromobenzene, the main research area is phenanthroline ligand iridium catalyst electron density borylation alkane; C–H borylation; alkane functionalization; catalyst design; iridium; phenanthrolines; reaction kinetics.

An in-depth study of iridium catalysts for the borylation of alkyl C-H bonds is reported. Although the borylation of aryl C-H bonds can be catalyzed by iridium complexes containing phen or bpy ligands at mild temperatures and with limiting arene, the borylation of alkyl C-H bonds remains underdeveloped. We prepared a library of phenanthrolines that contain varying substitution patterns. The corresponding phen-Ir trisboryl carbon monoxide complexes were synthesized to determine the electron-donating ability of these ligands, and the initial rates for the borylation of the C-H bonds in THF and diethoxyethane β to oxygen catalyzed by Ir complexes containing these ligands were measured. For some subsets of these ligands, the donor ability correlated pos. with the rate of C-H borylation catalyzed by the complexes containing ligands within a given subset. However, across subsets, ligands possessing similar donor properties to one another form catalysts for the borylation of alkyl C-H bonds with widely varying activity. This phenomenon was investigated computationally, and it was discovered that the stabilizing interactions between the phenanthroline ligand and the boryl ligands attached to Ir in the transition state for C-H oxidative addition could account for the differences in the activity of the catalysts that possess similar electron densities at Ir. The effect of these interactions on the borylation of secondary alkyl C-H bonds is larger than it is on the borylation of primary alkyl C-H bonds.

ACS Catalysis published new progress about Alkanes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Recommanded Product: 2,4,6-Trimethylbromobenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kashida, Junki; Shoji, Yoshiaki; Fukushima, Takanori published the artcile< Synthesis and Reactivity of Cyclic Borane-Amidine Conjugated Molecules Formed by Direct 1,2-Carboboration of Carbodiimides with 9-Borafluorenes>, Related Products of 576-83-0, the main research area is cyclic borane amidine conjugated preparation carboboration carbodiimide borafluorene; crystal mol structure cyclic borane amidine conjugate; amidines; borafluorenes; carboboration; carbodiimides; heterocycles.

Efficient 1,2-carboboration reactions to the C:N bond of carbodiimides with 9-borafluorenes, which give rise to cyclic borane-amidine conjugates with a seven-membered BNC5 ring, are reported. The resulting cyclic borane-amidine conjugates can be hydrolyzed into an acyclic bifunctional biaryl compound carrying both boronic acid and amidine groups, rendering the utility of the two-step protocol for the synthesis of multi-functionalized mol. systems with a potential as a supramol. building block. Furthermore, the conjugated structure of the cyclic boron-amidine compounds can be changed upon alkylation of the boron atom that increases the coordination number of boron. The combination of Lewis acid (borane) and conjugated base (amidine) provides rich structural diversity of heteroatom-containing π-conjugated systems.

Chemistry – An Asian Journal published new progress about Borylation (carboboration). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Related Products of 576-83-0.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Baulu, Nicolas; Poradowski, Marie-Noelle; Verrieux, Ludmilla; Thuilliez, Julien; Jean-Baptiste-dit-Dominique, Francois; Perrin, Lionel; D’Agosto, Franck; Boisson, Christophe published the artcile< Design of selective divalent chain transfer agents for coordinative chain transfer polymerization of ethylene and its copolymerization with butadiene>, Formula: C9H11Br, the main research area is divalent chain transfer agent ethylene butadiene polymerization.

PhMg(CH2)5MgPh and MesMg(CH2)5MgMes – divalent bis-metalated chain transfer agents (CTA) – were designed, synthesized and implemented in the polymerization of ethylene or the copolymerization of ethylene with butadiene mediated by {(Me2Si(C13H8)2)Nd(μ-BH4)[(μ-BH4)Li(THF)]}2. The systems showed coordinative chain transfer (co)polymerization features with a selectivity towards the initiation depending on the CTA used. Whereas PhMg(CH2)5MgPh initiated chain growth both at the alkyl and aryl sides, MesMg(CH2)5MgMes led to an unprecedented selective polymer chain growth from the alcanediyl moiety while the mesityl groups remain as spectators. The mechanism of the polymerization initiation has been investigated computationnaly at the DFT level. The theor. contribution of the study highlights the different intermediates formed upon combination of the neodymium metallocene and the magnesium CTA, and rationalize the specifity confered by the mesityl groups to induce selective initiation on an alkyl moiety.

Polymer Chemistry published new progress about Chain transfer agents. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary