Tag: 100-200

The author of 《Organic-inorganic hybrid 1-D double chain heteropolymolybdates constructed from plenary Keggin germanomolybdate anions and hepta-nuclear Cu-RE-pic heterometallic clusters》 were Hu, Huifen; Gong, Peijun; Pang, Jingjing; Jiang, Jun; Chen, Lijuan; Zhao, Junwei. And the article was published in Dalton Transactions in 2019. Application of 98-98-6 The author mentioned the following in the article:

Two unprecedented organic-inorganic hybrid 1-D double chain germanomolybdates containing hepta-nuclear Cu-RE-pic heterometallic clusters [NH4]2[RE(H2O)5]2[Cu(pic)2]2[Cu(pic)2(H2O)2]3[α-GeMo12O40]2·22H2O [RE = La3+ (1), Ce3+ (2), and Hpic = 2-picolinic acid] were successfully obtained by the stepwise self-assembly strategy via the conventional solution method. The most striking structural feature of 1 and 2 is that the two plenary Keggin [α-GeMo12O40]4- polyoxoanions are joined by an organic-inorganic hybrid hepta-nuclear Cu-RE-pic {[RE(H2O)5]2[Cu(pic)2(H2O)2]3[Cu(pic)2]2}6+ heterometallic moiety. What is more interesting is that their adjacent structural units are connected together by {Cu(pic)2} bridges, forming a 1-D extended double chain architecture. Furthermore, the adsorption capacity of 1 toward dyes in aqueous solutions was deeply investigated. It is fascinating that 1 shows a good adsorption capacity toward basic violet 3 (BV 3) in aqueous solutions and the adsorption kinetics conforms to the second-order kinetic model. The results came from multiple reactions, including the reaction of Picolinic acid(cas: 98-98-6Application of 98-98-6)

Picolinic acid(cas: 98-98-6) is used as a chelate for alkaline earth metals. Used to prepare picolinato ligated transition metal complexes. In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.Application of 98-98-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Organic-inorganic hybrids assembled from plenary Keggin-type germanotungstate units and 3d-4f heterometal clusters》 were Li, Huijie; Gong, Peijun; Jiang, Jun; Li, Yamin; Pang, Jingjing; Chen, Lijuan; Zhao, Junwei. And the article was published in Dalton Transactions in 2019. Application of 98-98-6 The author mentioned the following in the article:

Two kinds of organic-inorganic 3d-4f heterometal hybrids based on plenary α-Keggin-type germanotungstates [Cu2(H2O)3(PA)3] [Ln0.5Na0.5Cu2(H2O)12(PA)3][α-GeW12O40]·5H2O [Ln = La3+ (1), Ce3+ (2)] and [Cu2(H2O)2(PA)3][Cu(PA)2][Ln(H2O)7][α-GeW12O40]·7H2O [Ln = Tb3+ (3), Dy3+ (4), HPA = 2-picolinic acid] were prepared via the strategy of combining an in situ assembly reaction and stepwise synthesis in the aqueous solution The most remarkable structural characteristic of 1-2 is that neighboring structural units are connected into a 1-D chain alignment by the bridging di-copper [Cu2(H2O)3(PA)3]+ subunits, whereas the most outstanding structural feature of 3-4 is that neighboring structural units are interconnected to generate a zigzag 1-D chain alignment by the bimetallic bridging [Cu2(H2O)3(PA)3]+ subunits, and then adjacent zigzag 1-D chains are integrated into a fascinating 2-D sheet structure by heterobimetallic bridging {Tb(H2O)7[Cu(PA)2]0.5}3+ subunits and [Cu(PA)2] groups. As far as authors know, 1-4 represent the first examples of plenary Keggin heterometal germanotungstates including organic 3d-4f heterometal subunits so far. The electrochem. sensing properties towards the detection of Acetaminophen of 1/3@CMWCNT-Nafion/GCE electrochem. sensors were investigated, showing that 1/3@CMWCNT-Nafion/GCE electrochem. sensors exhibit good stability and good sensing performance towards AC detection. In the part of experimental materials, we found many familiar compounds, such as Picolinic acid(cas: 98-98-6Application of 98-98-6)

Picolinic acid(cas: 98-98-6) is used as a chelate for alkaline earth metals. Used to prepare picolinato ligated transition metal complexes. In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.Application of 98-98-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Exploring antiaromaticity in single-molecule junctions formed from biphenylene derivatives》 were Gantenbein, Markus; Li, Xiaohui; Sangtarash, Sara; Bai, Jie; Olsen, Gunnar; Alqorashi, Afaf; Hong, Wenjing; Lambert, Colin J.; Bryce, Martin R.. And the article was published in Nanoscale in 2019. Related Products of 2510-22-7 The author mentioned the following in the article:

We report the synthesis of a series of oligophenylene-ethynylene (OPE) derivatives with biphenylene core units, designed to assess the effects of biphenylene antiaromaticity on charge transport in mol. junctions. Analogs with naphthalene, anthracene, fluorene and biphenyl cores are studied for comparison. The mols. are terminated with pyridyl or methylthio units. Single-mol. conductance data were obtained using the mech. controllable break junction (MCBJ) technique. It is found that when electrons pass from one electrode to the other via a phenylene ring, the elec. conductance is almost independent of the nature of the pendant π-systems attached to the phenylene ring and is rather insensitive to antiaromaticity. When electrons pass through the cyclobutadiene core of the biphenylene unit, transport is sensitive to the presence of the relatively weak single bonds connecting the two phenylene rings of biphenylene, which arise from partial antiaromaticity within the cyclobutadiene core. This leads to a negligible difference in the mol. conductance compared to the fluorene or biphenyl analogs which have standard single bonds. This ability to tune the conductance of mol. cores has no analog in junctions formed from artificial quantum dots and reflects the quantum nature of electron transport in mol. junctions, even at room temperature In the experiment, the researchers used 4-Ethynylpyridine(cas: 2510-22-7Related Products of 2510-22-7)

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Related Products of 2510-22-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《A unique nickel-base nitrogen-oxygen bidentate ligand catalyst for carbonylation of acetylene to acrylic acid》 were Cui, Long; Yang, Xiangui; Zeng, Yi; Chen, Yuntang; Wang, Gongying. And the article was published in Molecular Catalysis in 2019. Electric Literature of C7H9NO The author mentioned the following in the article:

A nickel-base nitrogen-oxygen bidentate ligand catalyst was prepared in-situ via the complexation method. Our results show that the ligand with nickel can form a chelate catalyst possessing a ring structure, which exhibits good catalytic performance in the carbonylation reaction of acetylene to acrylic acid (AA). Furthermore, we discovered that, under our optimized conditions, when 8-hydroxyquinoline (HQ) is used as the ligand [c(Ni(OAc)2·4H2O) = 15 X 10-6 mol L-1, n(HQ):n(Ni(OAc)2·4H2O) = 1:1, V(H2O) = 7 mL], 70.1% conversion of acetylene and 92.4% the selectivity of AA is achieved at 200 °C with 8.0 MPa pressure for 30 min. Compared to traditional acetylene carbonylation catalysts and nickel-base phosphine ligand homogeneous complex catalysts, our catalytic system has unique advantages, including no copper, no halogen and no carbon deposition generated during the reaction process. It displays high selectivity and no corrosion of equipment, suggesting that this catalytic system possesses future industrial applications. In the experiment, the researchers used 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2Electric Literature of C7H9NO)

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Electric Literature of C7H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Catalytic Recycling of a Th-H Bond via Single or Double Hydroboration of Inactivated Imines or Nitriles》 were Saha, Sayantani; Eisen, Moris S.. And the article was published in ACS Catalysis in 2019. Quality Control of 4-Cyanopyridine The author mentioned the following in the article:

The catalytic activity of the metallacycle thorium amide [(Me3Si)2N]2Th[κ2-(N,C)-CH2Si(CH3)2N(SiMe3)] (Th1) is presented for the selective dihydroboration of nitriles (-CN) with pinacolborane (HBpin). Using significantly low catalyst loading (0.1 mol %), the dihydroborated amines were achieved by the hydroboration of the -CN triple bond attached with aromatic, aliphatic, and heteroatom backbones with high turnover frequency (TOF) as compared to all the reported homogeneous metal catalysts in this reaction. In addition, for aldimines (-C=N-), the hydroboration precatalyst Th2 has been synthesized by the protonolysis of a seven-membered N-heterocyclic iminato ligand (LH) and Th1. The Th2 crystal structure and its performance in the synthesis of hydroborated secondary amine are also here presented. Detailed kinetic studies and thermodn. and stoichiometric experiments provided us with cumulative evidence supporting the proposed mechanism for the aforementioned reactions. The results came from multiple reactions, including the reaction of 4-Cyanopyridine(cas: 100-48-1Quality Control of 4-Cyanopyridine)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Quality Control of 4-Cyanopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Transition-metal-free decarboxylative halogenation of 2-picolinic acids with dihalomethane under oxygen conditions》 were Zhang, Xitao; Feng, Xiujuan; Zhang, Haixia; Yamamoto, Yoshinori; Bao, Ming. And the article was published in Green Chemistry in 2019. Related Products of 3510-66-5 The author mentioned the following in the article:

A convenient and efficient method for the synthesis of 2-halogen-substituted pyridines I [R = H, 6-Me, 4-Br, etc.; R1 = Cl, Br] was described. The decarboxylative halogenation of 2-picolinic acids with dihalomethane proceeded smoothly via N-chlorocarbene intermediates to afford 2-halogen-substituted pyridines in satisfactory to excellent yields under transition-metal-free conditions. This new type of decarboxylative halogenation was operationally simple and exhibited high functional-group tolerance. In the experiment, the researchers used 2-Bromo-5-methylpyridine(cas: 3510-66-5Related Products of 3510-66-5)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Related Products of 3510-66-5

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Assembling Ordered Crystals with Disperse Building Blocks》 were Santos, Peter J.; Cheung, Tung Chun; MacFarlane, Robert J.. And the article was published in Nano Letters in 2019. Synthetic Route of C5H7N3 The author mentioned the following in the article:

Conventional colloidal crystallization techniques typically require low dispersity building blocks in order to make ordered particle arrays, resulting in a practical challenge for studying or scaling these materials. Nanoparticles covered in a polymer brush therefore may be predicted to be challenging building blocks in the formation of high-quality particle superlattices, as both the nanoparticle core and polymer brush are independent sources of dispersity in the system. However, when supramol. bonding between complementary functional groups at the ends of the polymer chains are used to drive particle assembly, these “”nanocomposite tectons”” can make high quality superlattices with polymer dispersities as large as 1.44 and particle diameter relative standard deviations up to 23% without any significant change to superlattice crystallinity. Here we demonstrate and explain how the flexible and dynamic nature of the polymer chains that comprise the particle brush allows them to deform to accommodate the irregularities in building block size and shape that arise from the inherent dispersity of their constituent components. Incorporating “”soft”” components into nanomaterials design therefore offers a facile and robust method for maintaining good control over organization when the materials themselves are imperfect. After reading the article, we found that the author used 2,6-Diaminopyridine(cas: 141-86-6Synthetic Route of C5H7N3)

2,6-Diaminopyridine(cas: 141-86-6) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Synthetic Route of C5H7N3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,ACS Catalysis included an article by Betori, Rick C.; Scheidt, Karl A.. Recommanded Product: 100-48-1. The article was titled 《Reductive Arylation of Arylidene Malonates Using Photoredox Catalysis》. The information in the text is summarized as follows:

A strategy with arylidene malonates provides access to β-umpolung single-electron species. Reported here is the utilization of these operators in intermol. radical-radical arylations, while avoiding conjugate addition/dimerization reactivity that is commonly encountered in enone-based photoredox chem. This reactivity relies on tertiary amines that serve to both activate the arylidene malonate for single-electron reduction by a proton-coupled electron transfer mechanism as well as serve as a terminal reductant. This photoredox catalysis pathway demonstrates the versatility of stabilized radicals for unique bond-forming reactions. In the part of experimental materials, we found many familiar compounds, such as 4-Cyanopyridine(cas: 100-48-1Recommanded Product: 100-48-1)

4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Recommanded Product: 100-48-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Green Chemistry included an article by Chen, Jinjin; Meng, Huanxin; Zhang, Feng; Xiao, Fuhong; Deng, Guo-Jun. Synthetic Route of C7H7NO. The article was titled 《Transition-metal-free selective pyrimidines and pyridines formation from aromatic ketones, aldehydes and ammonium salts》. The information in the text is summarized as follows:

An efficient synthesis of pyrimidines and pyridines was developed from readily available aromatic ketones, aldehydes and ammonium salts under transition-metal-free conditions. In this strategy, ammonium salts were used as nitrogen sources and only water was generated as a nontoxic byproduct. A catalytic amount of NaIO4 played an important role in the selectivity control, whereas substituted pyridines were dominantly formed in its absence. The experimental process involved the reaction of 4-Acetylpyridine(cas: 1122-54-9Synthetic Route of C7H7NO)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Synthetic Route of C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2012,Salvi, Luca; Davis, Nicole R.; Ali, Siraj Z.; Buchwald, Stephen L. published 《A New Biarylphosphine Ligand for the Pd-Catalyzed Synthesis of Diaryl Ethers under Mild Conditions》.Organic Letters published the findings.HPLC of Formula: 13534-97-9 The information in the text is summarized as follows:

A new bulky biarylphosphine ligand has been developed that allows the Pd-catalyzed C-O cross-coupling of a wide range of aryl halides and phenols under milder conditions. The experimental process involved the reaction of 6-Bromopyridin-3-amine(cas: 13534-97-9HPLC of Formula: 13534-97-9)

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.HPLC of Formula: 13534-97-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem