Tag: M.W=300-400

Safety of 4,4′-Dibromobiphenyl. Recently I am researching about SMALL MOLECULES; BUILDING-BLOCKS; BENZOTHIADIAZOLE; OLIGOMERS; DERIVATIVES; FLUORESCENT; EMISSION; POLYMERS; BLEND; UNITS, Saw an article supported by the Russian Foundation for Basic Research (RFBR)Russian Foundation for Basic Research (RFBR) [18-29-17073]; RFBRRussian Foundation for Basic Research (RFBR) [18-33-20224]; Ministry of Science and Higher Education of the Russian Federation. Published in ELSEVIER SCI LTD in OXFORD ,Authors: Luponosov, YN; Solodukhin, AN; Balakirev, DO; Surin, NM; Svidchenko, EA; Pisarev, SA; Fedorov, YV; Ponomarenko, SA. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

In this work, a series of novel luminescent molecules of butterfly-like architecture based on TPA fragments with different central and side aromatic blocks were designed and synthesized. Various properties of the molecules were studied by differential scanning calorimetry, thermogravimetric analysis, UV-Vis optical spectroscopy and compared within this series as well as to their analogs having terminal trimethylsilyl moieties instead of diphenylamine ones. The molecules reported are promising luminescent materials, which combine high thermal stability, good solubility and large molar extinction coefficients with high photoluminescence quantum yields for emission in the green and red spectral regions. The experimental and theoretical investigations reported give more insight to the structure – property correlations for the TPA-based luminophores, as well as to their photostability and peculiarities of the conjugation through triphenylamine units between the central and the side fragments.

Safety of 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Luponosov, YN; Solodukhin, AN; Balakirev, DO; Surin, NM; Svidchenko, EA; Pisarev, SA; Fedorov, YV; Ponomarenko, SA or concate me.

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

An article Rigid Multidimensional Alkoxyamines: A Versatile Building Block Library WOS:000599066100001 published article about COVALENT POLYMER NETWORKS; FREE-RADICAL POLYMERIZATIONS; EFFICIENT SYNTHESIS; EXCHANGE-REACTION; N-ALKOXYAMINES; INITIATORS; STAR; CHEMISTRY; CHAINS in [Matt, Yannick; Wessely, Isabelle; Gramespacher, Lisa; Braese, Stefan] Karlsruhe Inst Technol KIT, Inst Organ Chem IOC, Fritz Haber Weg 6, D-76131 Karlsruhe, Germany; [Matt, Yannick; Braese, Stefan] Karlsruhe Inst Technol KIT, 3DMM2O Cluster Excellence EXC2082 1390761711, Kaiserstr 12, D-76131 Karlsruhe, Germany; [Tsotsalas, Manuel] Karlsruhe Inst Technol KIT, Inst Funct Interfaces IFG, Hermann Von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany; [Braese, Stefan] Karlsruhe Inst Technol KIT, Inst Biol & Chem Syst IBCS FMS, Hermann Von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany in 2021, Cited 46. Recommanded Product: 92-86-4. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Since the discovery of the living free-radical polymerization, alkoxyamines were widely used in nitroxide-mediated polymerization (NMP). Most of the known alkoxyamines bear just one functionality with only a few exceptions bearing two or more alkoxyamine units. Herein, we present a library of novel multidimensional alkoxyamines based on commercially available, rigid, aromatic core structures. A versatile approach allows the introduction of different sidechains which have an impact on the steric hindrance and dissociation behavior of the alkoxyamines. The reaction to the alkoxyamines was optimized by implementing a mild and reliable procedure to give all target compounds in high yields. Utilization of biphenyl, p-terphenyl, 1,3,5-triphenylbenzene, tetraphenylethylene, and tetraphenyl-methane results in linear, trigonal, square planar, and tetrahedral shaped alkoxyamines. These building blocks are useful initiators for multifold NMP leading to star-shaped polymers or as a linker for the nitroxide exchange reaction (NER), to obtain dynamic frameworks with a tunable crosslinking degree and self-healing abilities.

About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Matt, Y; Wessely, I; Gramespacher, L; Tsotsalas, M; Brase, S or concate me.. Recommanded Product: 92-86-4

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

Safety of 4,4′-Dibromobiphenyl. I found the field of Environmental Sciences & Ecology very interesting. Saw the article Previously identified and unidentified polybrominated biphenyl congeners in serum from people living in an electronic waste dismantling area in China published in 2021, Reprint Addresses Jin, J (corresponding author), Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China.; Wei, YJ (corresponding author), Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl.

The effects of polybrominated biphenyls (PBBs) on human health have previously attracted much attention, but recent studies of PBBs have been focused on BB-153 and a few other congeners. PBB concentrations in serum samples from residents of an area containing an electronic waste dismantling site were determined in this study. The total PBB concentrations (i.e., the sums of the concentrations of the 35 PBB congeners) were 229-1360 ng/g lipid. The BB-153 concentrations were markedly higher in the samples from people living in the electronic waste dismantling area than in samples from people living in a nearby control area. BB-153 was found in all of the samples from the study exposure area but the concentrations were relatively low (0.07-4.70 ng/g lipid). High BB-1 concentrations were found for the first time in serum from people living in both the electronic waste dismantling and control areas. The BB-1 concentrations were 211-1280 ng/g lipid. The retention times of the 35 PBB standards and PCBs (polychlorinated biphenyls) with similar structures were used to predict the retention times of unidentified PBB congeners to allow the PBB distributions in the serum samples to be identified. A total of 26 previously unidentified PBB congeners were identified in the human serum samples. BB-5, BB-35, BB-79, and BB-109 were found in >50% of the samples. The PBB patterns in the serum samples were different from the patterns previously found in serum after a PBB contamination incident in 1973, so the health risks currently posed by PBBs are worth studying. (C) 2021 Published by Elsevier Ltd.

Safety of 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Wang, SJ; Jin, JX; Guo, C; Li, ZG; Wang, Y; Wei, YJ; Jin, J or concate me.

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

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. HPLC of Formula: C12H8Br2

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.

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.. HPLC of Formula: C12H8Br2

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

Name: 4,4′-Dibromobiphenyl. Authors Tian, ZY; Lei, Y; Fan, YK; Zhou, PL; Liu, F; Zhu, ZQ; Sun, HX; Liang, WD; Li, A in ROYAL SOC CHEMISTRY published article about in [Tian, Zhuoyue; Lei, Yang; Fan, Yukang; Zhou, Peilei; Liu, Fang; Zhu, Zhaoqi; Sun, Hanxue; Liang, Weidong; Li, An] Lanzhou Univ Technol, Coll Petrochem Technol, Langongping Rd 287, Lanzhou 730050, Peoples R China in 2021, Cited 41. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Airborne particulate matter (PM) has received increasing attention as it causes serious environmental pollution and huge health risk for humans. Herein, we demonstrate the synthesis of tubular conjugated microporous polymers (CMPs) via a one-step cross-coupling reaction for the removal of PM from the air. Tubular CMPs possess a large specific surface area (>484 m(2) g(-1)), high physicochemical stability and mechanical flexibility and robustness. Benefiting from their abundant porosity, CMP-based filters show desirable ability for the capture of PM with a high efficiency of greater than 99% for both PM2.5 and PM10. In combination with their interestingly intrinsic hydrophobicity, a high filtration efficiency for PM2.5 greater than 99.97% can be obtained even under high-humidity conditions (relatively 96 +/- 2%), which can be maintained unchanged during a 12 h continuous test, making them highly advantageous over those hydrophilic filters that usually lose their filtration efficiency in a humid environment. Based on their simple fabrication, inherently hydrophobic wettability and high filtration efficiency, the as-synthesized CMP-based filters would hold great potential as promising filters for PM elimination in a humid environment under harsh conditions by taking the advantage of the intrinsically robust physicochemical properties of CMPs. More interestingly, due to the designable flexibility of CMPs, which makes it possible for fine-tuning their pore size or chemical composition, the tailored-design of advanced CMP-based filters for a specific purpose could be anticipated only by rationally varying the size or structure of their building blocks.

Name: 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Tian, ZY; Lei, Y; Fan, YK; Zhou, PL; Liu, F; Zhu, ZQ; Sun, HX; Liang, WD; Li, A or concate me.

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

An article Developing D-pi-D hole-transport materials for perovskite solar cells: the effect of the pi-bridge on device performance WOS:000611544100023 published article about HIGHLY EFFICIENT; HALIDE PEROVSKITES; LOW-COST; HYBRID in [Ou, Yangmei; Sun, Anxin; Wu, Tai; Zhang, Dongyang; Xu, Peng; Zhao, Rongmei; Zhu, Liqiong; Wang, Runtao; Hua, Yong] Yunnan Univ, Yunnan Key Lab Micro Nano Mat & Technol, Sch Mat & Energy, Kunming 650091, Yunnan, Peoples R China; [Li, Haibei] Shandong Univ, Sch Ocean, Weihai 264209, Peoples R China; [Xu, Bo] KTH Royal Inst Technol, Sch Chem, SE-10044 Stockholm, Sweden; [Ding, Liming] Natl Ctr Nanosci & Technol, Ctr Excellence Nanosci CAS, Key Lab Nanosyst & Hierarch Fabricat CAS, Beijing 100190, Peoples R China in 2021, Cited 47. Recommanded Product: 4,4′-Dibromobiphenyl. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4

Three cost-effective D-pi-D hole transport materials (HTMs) with different pi-bridges, including biphenyl (SY1), phenanthrene (SY2), and pyrene (SY3), have been synthesized via a one-pot reaction with cheap commercially available starting materials for application in organic-inorganic hybrid perovskite solar cells (PSCs). The effects of the various pi-bridges on the photophysical, electrochemical, and electrical properties, and film morphologies of the materials, as well as on the photovoltaic properties of the PSCs, have been systematically investigated accordingly. Our results clearly show that HTM-SY3 with pyrene as the pi-bridge exhibits higher hole mobility and better hole extraction/transport and film formation abilities than the other two HTMs. Devices that employed SY3 as the HTM show impressive power conversion efficiency (PCE) values of 19.08% and 13.41% in (FAPbI(3))(0.85)(MAPbBr(3))(0.15)- and CsPbI2Br-based PSCs, respectively, which are higher than those of the reference HTM-SY1- and SY2-based ones. Our studies demonstrate a promising strategy to rationally design and synthesize low-cost and efficient HTMs through structural engineering for use in PSCs.

Recommanded Product: 4,4′-Dibromobiphenyl. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Ou, YM; Sun, AX; Li, HB; Wu, T; Zhang, DY; Xu, P; Zhao, RM; Zhu, LQ; Wang, RT; Xu, B; Hua, Y; Ding, LM or concate me.

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

Formula: C12H8Br2. Grosjean, S; Hassan, Z; Woll, C; Brase, S in [Grosjean, Sylvain; Braese, Stefan] KIT, Inst Biol Interfaces 3 IBG 3, Soft Matter Synth Lab, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany; [Hassan, Zahid; Braese, Stefan] KIT, IOC, Fritz Haber Weg 6, D-76131 Karlsruhe, Germany; [Hassan, Zahid; Woell, Christof] KIT, IFG, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany; [Braese, Stefan] KIT, ITG, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany published Diverse Multi-Functionalized Oligoarenes and Heteroarenes for Porous Crystalline Materials in 2019, Cited 53. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4.

A modular synthesis of multi-functionalized biphenyl, terphenyl and higher linear oligophenylene dicarboxylic acids and pyridine-terminated oligoarenes by stepwise palladium-catalyzed borylation/Suzuki-Miyaura cross-coupling reactions is described. The presence of several distinct functional groups such as azide, hydroxy, and alkyne, as well as coordinative functional end groups (carboxylic acid or pyridine) combined in a single oligoarene molecular unit at strategic positions offer an advantageous dual-utility. First, these compounds can serve as useful molecular bricks (ditopic organic linkers) in the construction of complex porous crystalline materials. Second, after the assembly into the crystalline coordination networks, orthogonal functional sites within the linker-backbone offer tremendous potential from application perspectives as they can be modified by a wide range of post-synthetic modifications including azide-alkyne click chemistry. This allows further tailoring of the supramolecular assemblies to yield novel multifunctional materials.

Formula: C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Grosjean, S; Hassan, Z; Woll, C; Brase, S or concate me.

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

An article Diverse Multi-Functionalized Oligoarenes and Heteroarenes for Porous Crystalline Materials WOS:000459317600002 published article about METAL-ORGANIC FRAMEWORKS; CROSS-COUPLING REACTIONS; REPETITIVE 2-STEP METHOD; CLICK CHEMISTRY; THIN-FILMS; PORE-SIZE; POLYMER; DESIGN; ADSORPTION; CONVERSION in [Grosjean, Sylvain; Braese, Stefan] KIT, Inst Biol Interfaces 3 IBG 3, Soft Matter Synth Lab, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany; [Hassan, Zahid; Braese, Stefan] KIT, IOC, Fritz Haber Weg 6, D-76131 Karlsruhe, Germany; [Hassan, Zahid; Woell, Christof] KIT, IFG, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany; [Braese, Stefan] KIT, ITG, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany in 2019, Cited 53. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4. Recommanded Product: 92-86-4

A modular synthesis of multi-functionalized biphenyl, terphenyl and higher linear oligophenylene dicarboxylic acids and pyridine-terminated oligoarenes by stepwise palladium-catalyzed borylation/Suzuki-Miyaura cross-coupling reactions is described. The presence of several distinct functional groups such as azide, hydroxy, and alkyne, as well as coordinative functional end groups (carboxylic acid or pyridine) combined in a single oligoarene molecular unit at strategic positions offer an advantageous dual-utility. First, these compounds can serve as useful molecular bricks (ditopic organic linkers) in the construction of complex porous crystalline materials. Second, after the assembly into the crystalline coordination networks, orthogonal functional sites within the linker-backbone offer tremendous potential from application perspectives as they can be modified by a wide range of post-synthetic modifications including azide-alkyne click chemistry. This allows further tailoring of the supramolecular assemblies to yield novel multifunctional materials.

About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Grosjean, S; Hassan, Z; Woll, C; Brase, S or concate me.. Recommanded Product: 92-86-4

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

An article Variability in fish bioconcentration factors: Influences of study design and consequences for regulation WOS:000498305500007 published article about CHEMICALS in [Wassenaar, Pim N. H.; Verbruggen, Eric M. J.; Peijnenburg, Willie J. G. M.] Natl Inst Publ Hlth & Environm RIVM, Ctr Safety Subst & Prod, POB 1, NL-3720 BA Bilthoven, Netherlands; [Wassenaar, Pim N. H.; Cieraad, Ellen; Peijnenburg, Willie J. G. M.; Vijver, Martina G.] Leiden Univ, Inst Environm Sci CML, POB 9518, NL-2300 RA Leiden, Netherlands in 2020, Cited 43. The Name is 4,4′-Dibromobiphenyl. Through research, I have a further understanding and discovery of 92-86-4. Computed Properties of C12H8Br2

The fish bioconcentration factor (BCF) is an important aspect within bioaccumulation assessments. Several factors have been suggested to influence BCF values – including species, developmental stage, mixture exposure, and calculation method. However, their exact contribution to variance in BCF values is unknown. Within this study we assessed the relative impact of these test characteristics on BCF values and analyzed the reproducibility of aquatic exposure bioconcentration tests. Linear mixed effects analyses were performed on a newly develop database to investigate the relationship between the response variable (i.e. lipid normalized log BCF values) and several test characteristics as fixed effects. Lower BCF values were observed for substances that were simultaneously applied with high molecular weight polycyclic aromatic hydrocarbons compared to single substance exposure (with an average difference of -0.81 log BCF). Also, lower BCFs upon kinetic determination were observed compared to steady-state BCFs (log BCF -0.27), and lower BCFs for species from the Ostariophysi subcohort level (log BCF -0.17 to -0.15). In addition, data analysis showed high variation within BCF values for single substances (average SD = log BCF 0.21), which questions the robustness of the current bioaccumulation assessments. For example, the 95% confidence range of a BCF value of 2500 ranges from 953 (‘not-bioaccumulative’) to 6561 (‘very bioaccumulative’). Our results show that the use of one single BCF leads to a high uncertainty in bioaccumulation assessments. We strongly recommend that within future bioconcentration studies, the used experimental design and test conditions are described in detail and justified to support solid interpretation. (C) 2019 The Authors. Published by Elsevier Ltd.

Computed Properties of C12H8Br2. About 4,4′-Dibromobiphenyl, If you have any questions, you can contact Wassenaar, PNH; Verbruggen, EMJ; Cieraad, E; Peijnenburg, WJGM; Vijver, MG or concate me.

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

I found the field of Chemistry very interesting. Saw the article Stepwise Evolution of Molecular Nanoaggregates Inside the Pores of a Highly Flexible Metal-Organic Framework published in 2019. Recommanded Product: 4,4′-Dibromobiphenyl, Reprint Addresses Pelagatti, P; Bacchi, A (corresponding author), Univ Parma, Dipartimento Sci Chim Vita & Sostenibilita Ambien, Viale Sci 17A, I-43124 Parma, Italy.; Bacchi, A (corresponding author), Univ Parma, Biopharmanet TEC, Via Parco Area Sci 27-A, I-43124 Parma, Italy.; Pelagatti, P (corresponding author), CIRCC, Via Celso Ulpiani 27, I-70126 Bari, Italy.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl

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.

Recommanded Product: 4,4′-Dibromobiphenyl. 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