Tag: M.W=300-400

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. Formula: C12H8Br2. 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] .

Formula: C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Feizpour, F; Jafarpour, M; Rezaeifard, A or concate me.

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

Recently I am researching about TRINUCLEAR COPPER(I) ACETYLIDES; N-HETEROCYCLIC CARBENES; CARBONYL-COMPLEXES; CLUSTERS; ELECTROCHEMISTRY; NANOPARTICLES; CHEMISTRY; TE; CONSTRUCTION; SPECTROSCOPY, Saw an article supported by the Ministry of Science and Technology of TaiwanMinistry of Science and Technology, Taiwan [107-2113-M-003-006]. Formula: C12H8Br2. Published in ROYAL SOC CHEMISTRY in CAMBRIDGE ,Authors: Shieh, MH; Liu, YH; Wang, CC; Jian, H; Lin, CN; Chen, YM; Huang, CY. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

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.

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.. Formula: C12H8Br2

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

Authors Skorotetcky, MS; Borshchev, OV; Cherkaev, GV; Ponomarenko, SA in MAIK NAUKA/INTERPERIODICA/SPRINGER published article about in [Skorotetcky, M. S.; Borshchev, O. V.; Cherkaev, G. V.; Ponomarenko, S. A.] Russian Acad Sci, Enikolopov Inst Synthet Polymer Mat, Ul Profsoyuznaya 70, Moscow 117393, Russia; [Ponomarenko, S. A.] Moscow MV Lomonosov State Univ, Fac Chem, Leninskie Gory 1, Moscow 119991, Russia in 2019, Cited 26. Quality Control of 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

A series of nanostructured organosilicon luminophores (NOLs) composed of a central 1,4-bis(5-phenyl-1,3-oxazol-2-yl)benzene (POPOP) acceptor chromophore and various peripheral p-terphenyl and 2,5-diphenyl-1,3-oxazole donor fragments have been synthesized for the first time using van Leusen reaction and direct palladium-catalyzed C-arylation of oxazole ring. Due to different functionalities of the silicon branching centers, NOLs with different donor-acceptor ratios have been obtained. The synthesized structures are expected to possess good optical characteristics for use in photonics and optoelectronics.

Quality Control of 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Skorotetcky, MS; Borshchev, OV; Cherkaev, GV; Ponomarenko, SA or concate me.

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

Category: benzoxazole. In 2019 ACS OMEGA published article about HIGHLY EFFICIENT PHOSPHORESCENT; QUANTUM EFFICIENCY; ELECTROLUMINESCENCE; MOLECULES; COMPLEX in [Rao, Jiancheng; Zhao, Chenyang; Bai, Keyan; Wang, Shumeng; Ding, Junqiao; Wang, Lixiang] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China; [Rao, Jiancheng; Bai, Keyan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhao, Chenyang; Ding, Junqiao; Wang, Lixiang] Univ Sci & Technol China, Hefei 230026, Peoples R China; [Wang, Yanping] Changchun Univ Sci & Technol, Sch Mat Sci & Engn, Changchun 130022, Peoples R China in 2019, Cited 40. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A deep-blue thermally activated delayed fluorescence (TADF) emitter TXADO-spiro-DMACF has been reported for nondoped organic light-emitting diodes (OLEDs) by integrating an appropriate blocking unit with the donor (D)-acceptor (A)-donor (D)-type TADF emitter via a spiro linkage. Benefiting from the characteristic perpendicular arrangement, the intermolecular interactions are expected to be weakened to some degree. As a result, TXADO-spiro-DMACF shows a very small bathochromic shift of 8 nm associated with a narrowed full width at half maximum of 54 nm on going from solution to the film. The corresponding nondoped device successfully achieves a bright deep-blue emission, revealing Commission Internationale de l’Eclairage coordinates of (0.16, 0.09) and a peak external quantum efficiency of 5.3% (5.3 cd/A, 5.9 lm/W). The results clearly indicate that spiro-blocking is a promising strategy to develop deep-blue TADF emitters capable of nondoped OLEDs.

Category: benzoxazole. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Rao, JC; Zhao, CY; Wang, YP; Bai, KY; Wang, SM; Ding, JQ; Wang, LX or concate me.

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

Authors Balestri, D; Mazzeo, PP; Carraro, C; Demitri, N; Pelagatti, P; Bacchi, A in WILEY-V C H VERLAG GMBH published article about ESSENTIAL OILS; CRYSTALLOGRAPHY; SEPARATION; BINDING; FLASKS in [Balestri, Davide; Mazzeo, Paolo P.; Carraro, Claudia; Pelagatti, Paolo; Bacchi, Alessia] Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Viale Sci 17A, I-43124 Parma, Italy; [Mazzeo, Paolo P.; Bacchi, Alessia] Univ Parma, Biopharmanet TEC, Via Parco Area Sci 27-A, I-43124 Parma, Italy; [Demitri, Nicola] Elettra Sincrotrone Trieste, SS 14 Km 163-5 Area Sci Pk, I-34149 Basovizza Trieste, Italy; [Pelagatti, Paolo] CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy in 2019, Cited 58. Category: benzoxazole. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

The crystalline sponge method (CSM) is primarily used for structural determination by single-crystal X-ray diffraction of a single analyte encapsulated inside a porous MOF. As the host-guest systems often show severe disorder, reliable crystallographic determination is demanding; thus the dynamics of the guest entering and the formation of nanoconfined molecular aggregates has not been in the spotlight. Now, the concept is investigated of the CSM for monitoring the structural evolution of nanoconfined supramolecular aggregates of eugenol guests with displacement of DMF inside the cavities of the flexible MOF, PUM168. The interpretation of the electron density provides a series of unique detailed snapshots depicting the supramolecular guest aggregation, thus showing the tight interplay between the host flexible skeleton and the molecular guests through the DMF-to-eugenol exchange process.

Category: benzoxazole. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Balestri, D; Mazzeo, PP; Carraro, C; Demitri, N; Pelagatti, P; Bacchi, A or concate me.

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

I found the field of Chemistry; Science & Technology – Other Topics very interesting. Saw the article Direct Synthesis of Methyl Formate from CO2 With Phosphine-Based Polymer-Bound Ru Catalysts published in 2019. Recommanded Product: 92-86-4, Reprint Addresses Hausoul, PJC; Palkovits, R (corresponding author), Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, Worringerweg 2, D-52074 Aachen, Germany.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

Methyl formate was produced in one pot through the hydrogenation of CO2 to formic acid/formate followed by an esterification step. The route offers the possibility to integrate renewable energy into the fossil-based chemical value chain. In this work, a phosphine-polymer-anchored Ru complex was shown to be an efficient solid catalyst for the direct hydrogenation of CO2 to methyl formate. The 1,2-bis(diphenylphosphino)ethane-like polymer presented the highest activity with a turnover number (TON) of up to 3401 at 160 degrees C. The reaction parameters were systemically investigated to optimize the reaction towards the formation of methyl formate. This catalyst could be reused seven times without a significant decrease in activity. Evolution of the catalytic Ru center during the reaction was revealed, and a possible reaction mechanism was proposed.

Recommanded Product: 92-86-4. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Sun, RY; Kann, A; Hartmann, H; Besmehn, A; Hausoul, PJC; Palkovits, R or concate me.

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

Category: benzoxazole. Sun, RY; Kann, A; Hartmann, H; Besmehn, A; Hausoul, PJC; Palkovits, R in [Sun, Ruiyan; Kann, Anna; Hausoul, Peter J. C.; Palkovits, Regina] Rhein Westfal TH Aachen, Inst Tech & Makromol Chem, Worringerweg 2, D-52074 Aachen, Germany; [Hartmann, Heinrich; Besmehn, Astrid] Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt ZEA 3, D-52425 Julich, Germany published Direct Synthesis of Methyl Formate from CO2 With Phosphine-Based Polymer-Bound Ru Catalysts in 2019, Cited 40. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Methyl formate was produced in one pot through the hydrogenation of CO2 to formic acid/formate followed by an esterification step. The route offers the possibility to integrate renewable energy into the fossil-based chemical value chain. In this work, a phosphine-polymer-anchored Ru complex was shown to be an efficient solid catalyst for the direct hydrogenation of CO2 to methyl formate. The 1,2-bis(diphenylphosphino)ethane-like polymer presented the highest activity with a turnover number (TON) of up to 3401 at 160 degrees C. The reaction parameters were systemically investigated to optimize the reaction towards the formation of methyl formate. This catalyst could be reused seven times without a significant decrease in activity. Evolution of the catalytic Ru center during the reaction was revealed, and a possible reaction mechanism was proposed.

Category: benzoxazole. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Sun, RY; Kann, A; Hartmann, H; Besmehn, A; Hausoul, PJC; Palkovits, R or concate me.

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

SDS of cas: 92-86-4. Recently I am researching about SELF-ASSEMBLING HOMO; SUPRAMOLECULAR CHIRALITY; MOLECULAR RECOGNITION; TRANSITION-METAL; HIGH-FIDELITY; ENCAPSULATION; CAGES; HYBRID; STABILIZATION; PHOTOPHYSICS, Saw an article supported by the JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [JP 17H03021]. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Nakamura, M; Tsukamoto, Y; Ueta, T; Sei, Y; Fukushima, T; Yoza, K; Kobayashi, K. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

A 2 : 4 mixture of tetrakis[4-(4-pyridyl)phenyl]cavitand (1) or tetrakis[4-(4-pyridyl)phenylethynyl]cavitand (2) and Pd(dppp)(OTf)(2)self-assembles into a homocapsule {1(2) . [Pd(dppp)](4)}(8+) . (TfO-)(8)(C1) or {2(2) . [Pd(dppp)](4)}(8+) . (TfO-)(8)(C2), respectively, through Pd-Npy coordination bonds. A 1 : 1 : 4 mixture of1,2, and Pd(dppp)(OTf)(2)produced a mixture of homocapsulesC1,C2, and a heterocapsule {1 . 2 . [Pd(dppp)](4)}(8+) . (TfO-)(8)(C3) in a 1 : 1 : 0.98 mole ratio. Selective formation (self-sorting) of homocapsulesC1andC2or heterocapsuleC3was controlled by guest-induced encapsulation under thermodynamic control. Applications of Pd-Npy coordination capsules with the use of1were demonstrated. CapsuleC1serves as a guard nanocontainer fortrans-4,4 ‘-diacetoxyazobenzene to protect against thetrans-to-cisphotoisomerization by encapsulation. A chiral capsule {1(2) . [Pd((R)-BINAP)](4)}(8+) . (TfO-)(8)(C5) was also constructed. CapsuleC5induces supramolecular chirality with respect to prochiral 2,2 ‘-bis(alkoxycarbonyl)-4,4 ‘-bis(1-propynyl)biphenyls by diastereomeric encapsulation through the asymmetric suppression of rotation around the axis of the prochiral biphenyl moiety.

About 4,4’-Dibromobiphenyl, If you have any questions, you can contact Nakamura, M; Tsukamoto, Y; Ueta, T; Sei, Y; Fukushima, T; Yoza, K; Kobayashi, K or concate me.. SDS of cas: 92-86-4

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

Quality Control of 4,4′-Dibromobiphenyl. In 2020 ARKIVOC published article about N-HETEROCYCLIC CARBENES; EFFICIENT SYNTHESIS; C-C; PALLADIUM; COMPLEXES; ARYL; AMINATION; ACID in [Lucke, Ana-Luiza; Pruschinski, Lucas; Freese, Tyll; Schmidt, Andreas] Tech Univ Clausthal, Inst Organ Chem, Leibnizstr 6, D-38678 Clausthal Zellerfeld, Germany in 2020, Cited 50. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

Seven different palladium complexes of sydnones and sydnone imines and a co-catalyst system consisting of lithium sydnone-4-carboxylate and Pd(PPh3)(4) catalyzed Sonogashira-Hagihara reactions between (hetero)aromatic bromides and 2-methylbut-3-yn-2-ol (52 examples, up to 100% yield). The co-catalyst system and a sydnone Pd complex were also tested in Buchwald-Hartwig reactions (9 examples, up to 100% yield). [GRAPHICS]

Quality Control of 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Lucke, AL; Pruschinski, L; Freese, T; Schmidt, A or concate me.

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

In 2019 IND ENG CHEM RES published article about POLYCHLORINATED-BIPHENYLS PCBS; P-DIOXINS PCDDS; IRON NANOPARTICLES; REDUCTIVE HYDRODEHALOGENATION; ENVIRONMENTAL BEHAVIOR; DIBENZOFURANS PCDFS; ARYL HALIDES; IN-SITU; HYDRODECHLORINATION; HYDROGEN in [Biswas, Kinkar; Basu, Basudeb] North Bengal Univ, Dept Chem, Darjeeling 734013, India; [Chattopadhyay, Shreyasi; De, Goutam] CSIR, Cent Glass & Ceram Res Inst, 196 Raja SC Mullick Rd, Kolkata 700032, India; [Jing, Yunke; Che, Renchao; Zhao, Dongyuan] Fudan Univ, Dept Chem, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China; [Jing, Yunke; Che, Renchao; Zhao, Dongyuan] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China; [De, Goutam] Inst Nano Sci & Technol, Mohali 166062, Punjab, India; [Basu, Basudeb] Raiganj Univ, Raiganj 733134, India in 2019, Cited 58. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4. Safety of 4,4′-Dibromobiphenyl

A series of Pd/Fe2O3 nanohybrids with low metal content supported with Amberlite resin formate (Pd/Fe2O3@ARF) was prepared and characterized by FTIR, XRD, XPS, EELS, SEM-EDAX, and HRTEM. The coexistence of mainly crystalline Pd and Fe2O3 nanoparticles (NPs) of average size similar to 4-5 nm in the resin matrix was confirmed. These nanohybrids were used for hydrodehalogenation of polyhaloar-omatics using NaBH4 as a reducing agent in water. Notably, the composite Pd/Fe2O3@ARF-110 exhibits excellent catalytic performance in the hydrodehalogenation of different haloar-omatics. High TOF (in comparison to other related heterogeneous catalysts), recydability, and chemoselectivity between halide and C = C bond make this nanohybrid catalyst very attractive for the degradation of persistent organic pollutants originated from industries. The experimental observations and other analytical studies suggest that the enhanced catalytic activity could be due to strong interactions between Fe2O3 and Pd NPs that facilitate the cleavage of B-H bond and subsequent hydride generation.

Safety of 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Biswas, K; Chattopadhyay, S; Jing, YK; Che, RC; De, G; Basu, B; Zhao, DY or concate me.

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