Tag: M.W=300-400

Computed Properties of C12H8Br2. In 2019 J MATER CHEM A published article about COVALENT ORGANIC FRAMEWORK; PALLADIUM NANOPARTICLES; PERFORMANCE; SBA-15; NANOCATALYST; SELECTIVITY; COMPLEXES; SYSTEMS; WATER in [Ju, Pengyao; Wu, Shujie; Su, Qing; Li, Xiaodong; Liu, Ziqian; Wu, Qiaolin] Jilin Univ, Coll Chem, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China; [Li, Guanghua] Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China in 2019, Cited 60. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

The salen-porphyrin based conjugated microporous polymer (SP-CMP) was first constructed by polycondensation reaction of a salen-dialdehyde derivative and pyrrole. Due to the outstanding chemical and thermal stability, abundant micropores with a reasonable pore size, and ordered salen-porphyrin arrays in the A(4)B(4)-type polymer framework, the functional CMP was further applied as a Pd nanoparticle support by the coordinate interactions between the polydentate chelating sites with Pd(OAc)(2) and subsequent reduction with NaBH4. The as-synthesized composite material (Pd@SP-CMP) was fully characterized by powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and solid-state C-13 nuclear magnetic resonance (NMR). The porous property of Pd@SP-CMP was also characterized by N-2 adsorption/desorption isotherms and the obtained material exhibited a Brunauer-Emmett-Teller (BET) surface area of 266 m(2) g(-1), together with a pore volume of 0.192 cm(3) g(-1). The microscopic morphology of Pd@SP-CMP was further evaluated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The Pd@SP-CMP material with highly dispersed Pd nanoparticles exhibited excellent catalytic activity towards Suzuki-Miyaura and Heck-Mizoroki coupling reactions in water or in the dioxane/water mixture. In addition, Pd@SP-CMP also displayed outstanding stability and recyclability, and it can be reused without loss of activity in ten successive reactions. More importantly, the salen-porphyrin based CMPs could be the promising candidates for developing high-performance heterogeneous catalysts.

Computed Properties of C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Ju, PY; Wu, SJ; Su, Q; Li, XD; Liu, ZQ; Li, GH; Wu, QL or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Product Details of 92-86-4. Wu, FT; Nan, CL; Xie, JW; Ma, MY in [Wu, Fengtian; Nan, Chenlong; Ma, Mingyang] East China Univ Technol, Jiangxi Prov Key Lab Polymer Micro Nano Mfg & Dev, Nanchang 330013, Jiangxi, Peoples R China; [Xie, Jianwei] Hunan Univ Sci & Engn, Coll Chem & Bioengn, Yongzhou 425199, Peoples R China published 2,5-Dihydroxyterephthalic Acid Accelerated Cu(NO3)(2)center dot 3H(2)O-Catalyze Homocoupling Reaction of Arylboronic Acids in 2020, Cited 31. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A catalyst system derived from commercially available Cu(NO3)(2)center dot 3H(2)O and 2,5-dihydroxyterephthalic acid is applied to the homocoupling reaction of arylboronic acids. This transformation provides a convenient approach to symmetrical biaryls with good to excellent yields (39%95%), and exhibits good functional group compatibility. Furthermore, biaryl can be prepared in gram quantities in good yield.

Product Details of 92-86-4. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Wu, FT; Nan, CL; Xie, JW; Ma, MY or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Category: benzoxazole. Authors Lovell, TC; Colwell, CE; Zakharov, LN; Jasti, R in ROYAL SOC CHEMISTRY published article about in [Lovell, Terri C.; Colwell, Curtis E.; Jasti, Ramesh] Univ Oregon, Inst Mat Sci, Dept Chem & Biochem, Eugene, OR 97403 USA; [Zakharov, Lev N.] Univ Oregon, CAMCOR Ctr Adv Mat Characterizat Oregon, Eugene, OR 97403 USA in 2019, Cited 38. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

[n]Cycloparaphenylenes, or carbon nanohoops, are unique conjugated macrocycles with radially oriented pi-systems similar to those in carbon nanotubes. The centrosymmetric nature and conformational rigidity of these molecules lead to unusual size-dependent photophysical characteristics. To investigate these effects further and expand the family of possible structures, a new class of related carbon nanohoops with broken symmetry is disclosed. In these structures, referred to as meta[n]cycloparaphenylenes, a single carbon-carbon bond is shifted by one position in order to break the centrosymmetric nature of the parent [n]cycloparaphenylenes. Advantageously, the symmetry breaking leads to bright emission in the smaller nanohoops, which are typically non-fluorescent due to optical selection rules. Moreover, this simple structural manipulation retains one of the most unique features of the nanohoop structures-size dependent emissive properties with relatively large extinction coefficients and quantum yields. Inspired by earlier theoretical work by Tretiak and co-workers, this joint synthetic, photophysical, and theoretical study provides further design principles to manipulate the optical properties of this growing class of molecules with radially oriented pi-systems.

Category: benzoxazole. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Lovell, TC; Colwell, CE; Zakharov, LN; Jasti, R or concate me.

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Benzoxazole – Wikipedia,
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Safety of 4,4′-Dibromobiphenyl. In 2019 JOVE-J VIS EXP published article about (Q)SAR APPLICATION TOOLBOX; ACUTE TOXICITY; STRUCTURAL ALERTS; CLASSIFICATION; MUTAGENICITY; TOXTREE; PREDICTION; CHEMICALS; PRODUCTS in [Bohlen, Marie-Leonie; Jeon, Hyun Pyo; Kim, Young Jun; Sung, Baeckkyoung] KIST Europe Forschungsgesell MbH, Saarbrucken, Germany in 2019, Cited 39. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Computational analyses of toxicological processes enables high-throughput screening of chemical substances and prediction of their endpoints in biological systems. In particular, quantitative structure-activity relationship (QSAR) models have been increasingly applied to assess the environmental effects of a plethora of toxic materials. In recent years, some more highlighted types of toxicants are endocrine disruptors (EDs, which are chemicals that can interfere with any hormone-related metabolism). Because EDs may significantly affect animal development and reproduction, rapidly predicting the adverse effects of EDs using in silico techniques is required. This study presents an in silico method to generate prediction data on the effects of representative EDs in aquatic vertebrates, particularly fish species. The protocol describes an example utilizing the automated workflow of the QSAR Toolbox software developed by the Organization for Economic Co-operation and Development (OECD) to enable acute ecotoxicity predictions of EDs. As a result, the following are determined: (1) calculation of the numerical correlations between the concentration for 50% of lethality (LC50) and octanol-water partition coefficient (K-ow), (2) output performances in which the LC50 values determined in experiments are compared to those generated by computations, and (3) the dependence of estrogen receptor binding affinity on the relationship between K-ow and LC50.

About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Bohlen, ML; Jeon, HP; Kim, YJ; Sung, B or concate me.. Safety of 4,4′-Dibromobiphenyl

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Computed Properties of C12H8Br2. I found the field of Chemistry very interesting. Saw the article Nickel-Catalyzed Cross-Electrophile Coupling Reactions for the Synthesis of gem-Difluorovinyl Arenes published in 2020, Reprint Addresses Lian, Z (corresponding author), Sichuan Univ, West China Hosp, State Key Lab Biotherapy, Dept Dermatol, Chengdu 610041, Peoples R China.; Lian, Z (corresponding author), Sichuan Univ, West China Hosp, Canc Ctr, Chengdu 610041, Peoples R China.; Lian, Z (corresponding author), Sichuan Univ, West China Sch Pharm, Chengdu 610041, Peoples R China.; Cheng, GJ (corresponding author), Chinese Univ Hong Kong Shenzhen, Sch Life & Hlth Sci, Shenzhen Key Lab Steroid Drug Dev, Warshel Inst Computat Biol, Shenzhen 518172, Peoples R China.; Kramer, S (corresponding author), Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl.

A nickel-catalyzed cross-electrophile coupling reaction between (hetero)aryl bromides and 2,2-difluorovinyl tosylate is presented. This protocol provides facile incorporation of the gem-difluorovinyl moiety in organic molecules. The method features mild reaction conditions, good functional group tolerance, and excellent yields. Furthermore, mechanistic experiments and DFT studies indicate a Ni(0)/Ni(II) catalytic cycle, thus differing from the currently accepted catalytic cycle for nickel-catalyzed C(sp(2))-C(sp(2)) cross-electrophile coupling reactions.

Computed Properties of C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Xiong, BJ; Wang, T; Sun, HT; Li, Y; Kramer, S; Cheng, GJ; Lian, Z or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Name: 4,4′-Dibromobiphenyl. Shieh, MH; Liu, YH; Wang, CC; Jian, H; Lin, CN; Chen, YM; Huang, CY in [Shieh, Minghuey; Liu, Yu-Hsin; Wang, Chih-Chin; Jian, Huan; Lin, Chien-Nan; Chen, Yen-Ming; Huang, Chung-Yi] Natl Taiwan Normal Univ, Dept Chem, Taipei 11677, Taiwan published A comparative study on NHC-functionalized ternary Se/Te-Fe-Cu compounds: synthesis, catalysis, and the effect of chalcogens in 2019, Cited 80. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A novel family of N-heterocyclic carbene (NHC)-incorporated Se-Fe-Cu compounds, bis-1,3-dimethylimidazol-2-ylidene (bis-Me-2-imy)-containing compound [(mu(4)-Se)Fe-3(CO)(9){Cu(Me-2-imy)}(2)] (2), bis-N-methyl- or bis-N-isopropyl-substituted benzimidazol-2-ylidene (bis-Me-2-bimy or bis-Pr-i(2)-bimy)-incorporated compounds [(mu(4)-Se)Fe-3(CO)(9){Cu(Me-2-bimy)}(2)] (3) or [(mu(4)-Se)Fe-3(CO)(9){Cu(Pr-i(2)-bimy)}(2)] (4), and a bis-1,3-dimethyl-4,5-dichloroimidazol-2-ylidene (bis-Me-2-Cl-2-imy)-containing compound [(mu(3)-Se)Fe-3(CO)(9){Cu(Me-2-Cl-2-imy)}(2)] (5), were synthesized in moderate yields in facile one-pot reactions of the ternary pre-designed compound [(mu(3)-Se)Fe-3(CO)(9){Cu(MeCN)}(2)] (1) with the corresponding imidazolium salts and (KOBu)-Bu-t in THF in an ice-water bath. Single-crystal X-ray analyses revealed that the Me-2-imy compound 2 or the Me-2-bimy compound 3 each exhibited a trigonal bipyramidal SeFe3(CO)(9)Cu geometry with an Fe2Cu plane further capped by a Cu(Me-2-imy) or Cu(Me-2-bimy) fragment, respectively, with one long Cu-Cu covalent bond. In addition, compound 4 also comprised a trigonal bipyramidal SeFe3(CO)(9)Cu core structure, but the second Cu(Pr-i(2)-bimy) group bridged the equatorial Fe-Fe edge with two unbonded Cu atoms, due to the presence of a sterically bulky Pr-i(2)-bimy fragment. On the other hand, the strong electron-withdrawing chloro-containing NHC compound 5 showed a comparatively open tetrahedral SeFe3(CO)(9) metal core, where two Fe-Fe edges each were further bridged by a Cu(Me-2-Cl-2-imy) fragment. Due to the nonclassical C-H center dot center dot center dot O(carbonyl) hydrogen bonds between the CO groups of the SeFe3(CO)(9)Cu-2 core and CH moieties of the neighboring NHC ligands, both compounds 2 and 3 comprised a one-dimensional network, while compounds 4 and 5 each were made up of a two-dimensional framework in the solid state, which efficiently enhanced the stability of these Se-Fe-Cu NHC compounds. Importantly, all of these synthesized Se-Fe-Cu NHC compounds 2-5 had pronounced catalytic activities for the homocoupling of arylboronic acids with high catalytic yields. Finally, these Se-containing Fe-Cu NHC compounds further represented excellent models for studying chalcogen effects in comparison to their Te analogs, as demonstrated by their catalytic performances and electrochemical behaviors, and by DFT calculations.

Name: 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Shieh, MH; Liu, YH; Wang, CC; Jian, H; Lin, CN; Chen, YM; Huang, CY or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

An article Band Gap Modification of TiO2 Nanoparticles by Ascorbic Acid-Stabilized Pd Nanoparticles for Photocatalytic Suzuki-Miyaura and Ullmann Coupling Reactions WOS:000465575500013 published article about VISIBLE-LIGHT PHOTOCATALYSIS; SCHIFF-BASE COMPLEX; HETEROGENEOUS CATALYST; SURFACE MODIFICATION; ALLOY NANOPARTICLES; TITANIUM(IV) OXIDE; NANOTUBE ARRAYS; PALLADIUM; OXIDATION; PARTICLES in [Feizpour, Fahimeh; Jafarpour, Maasoumeh; Rezaeifard, Abdolreza] Univ Birjand, Fac Sci, Dept Chem, Catalysis Res Lab, Birjand 97179414, Iran in 2019, Cited 76. Recommanded Product: 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

In this study, synthesis, characterization and photocatalytic performance of surface-modified TiO2 nanoparticles with ascorbic acid-stabilized Pd nanoparticles are presented. The structure, composition and morphology of as-prepared nanophotocatalyst were characterized by UV-DRS, FT-IR, ICP-AES, TEM and XPS analysis. Ascorbic acid-stabilized Pd nanoparticles induced visible light driven photocatalytic property on the surface of TiO2 which are otherwise insensitive to visible light owing to the wide band gap. The catalytic system worked well for the Suzuki-Miyaura cross-coupling and Ullmann homocoupling under compact fluorescent light as a visible source with significant activity, selectivity and recyclability. Good to excellent yields of biaryl products were obtained for various aryl halides having different electronic demands and even aryl chlorides. Our results proposed that the improved photoactivity predominantly benefits from the synergistic effects of ascorbic acid-stabilized Pd nanoparticles on TiO2 nanoparticles that cause efficient separation and photoexcited charge carriers and photoredox capability of nanocatalyst. Thus, tuning of band gap of TiO2 making a visible light sensitive photocatalyst, demonstrates a significant advancement in the photocatalytic Suzuki-Miyaura and Ullmann coupling reactions. [GRAPHICS] .

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Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

Product Details of 92-86-4. In CHINESE J CHEM published article about SUZUKI-MIYAURA; CARBENE COMPLEXES; ARYL CHLORIDES; HECK REACTION; STRUCTURAL-CHARACTERIZATION; STERICALLY BULKY; NHC COMPLEXES; AQUEOUS-MEDIA; PD; LIGANDS in [Liu, Qingxiang; Zhang, Xiantao; Zhao, Zhixiang; Li, Xinying; Zhang, Wei] Tianjin Normal Univ, Coll Chem, Tianjin Key Lab Struct & Performance Funct Mol, Tianjin 300387, Peoples R China in , Cited 88. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Main observation and conclusion Two bis-imidazolium salts LH2 center dot Cl-2 and LH2 center dot(PF6)(2) with acylated piperazine linker and two N-heterocyclic carbene (NHC) silver(I) and palladium(II) complexes [L2Ag2](PF6)(2) (1) and [L2Pd2Cl4] (2) were prepared. The crystal structures of LH2 center dot Cl-2 and 1 were confirmed by X-ray analysis. In 1, one 26-membered macrometallocycle was generated through two silver(I) ions and two bidentate ligands L. The catalytic activity of 2 was investigated in Sonogashira, Heck-Mizoroki and Suzuki-Miyaura reactions. The results displayed that these C-C coupling reactions can be smoothly carried out under the catalysis of 2.

Product Details of 92-86-4. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Liu, QX; Zhang, XT; Zhao, ZX; Li, XY; Zhang, W or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

COA of Formula: C12H8Br2. In 2020 GREEN CHEM published article about ORGANIC-SYNTHESIS; CATALYST; POLYMER; CO2; NANOPARTICLES; ADSORPTION; FRAMEWORKS; EFFICIENT in [Tian, Yucheng; Wang, Jubo; Cheng, Xinying; Liu, Kang; Wu, Tizhi; Qiu, Xiaqiu; Kuang, Zijian; Li, Zhiyu; Bian, Jinlei] China Pharmaceut Univ, Sch Pharm, Dept Med Chem, Jiangsu Key Lab Drug Design & Optimizat, Nanjing 210009, Peoples R China in 2020, Cited 37. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A microwave-assisted, efficient and rapid Sonogashira reaction was developed for the synthesis of polysubstituted aromatic alkynes. The reaction was made environmentally friendly and easy to perform by replacing the traditional amine solvents with water. The optimized reaction conditions yielded the products with high yields, while reducing the dependence on anaerobic reaction conditions with no inert gas protection. The reaction also achieved the product on the milligram level, overcoming the problem of TMSA volatilization in small-scale reactions. The environmentally friendly reaction solvent, mild reaction conditions, high reaction yields and short reaction time made the reaction highly promising for various applications, especially for synthesizing porous aromatic frameworks.

COA of Formula: C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Tian, YC; Wang, JB; Cheng, XY; Liu, K; Wu, TZ; Qiu, XQ; Kuang, ZJ; Li, ZY; Bian, JL or concate me.

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem

I found the field of Chemistry very interesting. Saw the article Reducing the Exciton Binding Energy of Donor-Acceptor-Based Conjugated Polymers to Promote Charge-Induced Reactions published in 2019. Product Details of 92-86-4, Reprint Addresses Chen, X; Wang, XC (corresponding author), Fuzhou Univ, Coll Chem, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Fujian, Peoples R China.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

Exciton binding energy has been regarded as a crucial parameter for mediating charge separation in polymeric photocatalysts. Minimizing the exciton binding energy of the polymers can increase the yield of charge-carrier generation and thus improve the photocatalytic activities, but the realization of this approach remains a great challenge. Herein, a series of linear donor-acceptor conjugated polymers has been developed to minimize the exciton binding energy by modulating the charge-transfer pathway. The results reveal that the reduced energy loss of the charge-transfer state can facilitate the electron transfer from donor to acceptor, and thus, more electrons are ready for subsequent reduction reactions. The optimized polymer, FSO-FS, exhibits a remarkable photochemical performance under visible light irradiation.

About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Lan, ZA; Zhang, GG; Chen, X; Zhang, YF; Zhang, KAI; Wang, XC or concate me.. Product Details of 92-86-4

Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem