Day: October 21, 2022

《Visible-Light-Promoted Oxo-difluoroalkylation of Alkenes with DMSO as the Oxidant》 was written by Xia, Zi-Hao; Gao, Zhong-Hua; Dai, Lei; Ye, Song. Product Details of 94928-86-6This research focused onvisible light promoted oxo difluoroalkylation alkene DMSO oxidant. The article conveys some information:

Visible-light-promoted oxo-difluoroalkylation (acetylation and acetamidation) of alkenes with DMSO as both the solvent and the oxidant was developed, affording the corresponding α,α-difluoro-γ-ketoacetates and acetamides in modest yields. Both terminal and internal alkenes worked well for the reaction. This reaction features simple starting materials, a green oxidant, mild reaction conditions, and highly functional products. The experimental part of the paper was very detailed, including the reaction process of fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Product Details of 94928-86-6)

fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Product Details of 94928-86-6

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of C20H14N4On May 31, 2020, Chen, Hong-Shuo; Guo, Rui-Yun; Zhang, Qi-Ming; Liu, Yang-Sheng published an article in Monatshefte fuer Chemie. The article was 《Tunable solid-state photochromism based on proton and anion-controlled structural transformation of pyridinium-based organic small molecules》. The article mentions the following:

An organic mol. system with proton and anion-tunable photochromism properties based on a pyridinium derivative was developed. Through controlling the pH value and anion nature of the self-assembled systems, the novel three compounds displayed different photochromism behaviors. This work reveals that the introduction of addnl. groups into the mol. increases the diversity of the property of such complexes. In the experiment, the researchers used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Synthetic Route of C20H14N4)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. Synthetic Route of C20H14N4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Dumur, Frederic; Guerlin, Audrey; Lehoux, Anais; Selvakannan, P. R.; Miomandre, Fabien; Meallet-Renault, Rachel; Rebarz, Mateusz; Sliwa, Michel; Dumas, Eddy; Le Pleux, Loic; Pellegrin, Yann; Odobel, Fabrice; Mayer, Cedric R. published an article in Applied Surface Science. The title of the article was 《Mutual influence of gold and silver nanoparticles on Tris-(2,2’bipyridine)-Ru(II) core complexes: Post-functionalization processes, optical and electrochemical investigations》.Related Products of 138219-98-4 The author mentioned the following in the article:

The synthesis, reactivity and properties of a series of four polypyridyl ruthenium complexes have been studied. These complexes were used to post-functionalize preformed 3 nm silver and gold nanoparticles (NPs) in water and in dichloromethane (DCM). We studied the influence of the grafted complexes on the formation process and stability of the colloidal solutions and we investigated the optical and electrochem. properties of the final nanocomposites. Among the series of four ruthenium complexes, three novel heteroleptic complexes (1-3) bearing one pyridine, one amine or two carboxydithioic acid pendant groups were synthesized and reacted with preformed Au-NPs and Ag-NPs. Results were compared to those obtained with the model [Ru(bpy)3]2+ complex (4). The strength of the interaction between the anchoring group and the surface of NPs influenced the size, shape and stability of the final nanocomposites. Polar solvent such as water induced aggregation and lead to unstable nanocomposites. Stationary and time resolved luminescence of grafted nanocomposites (1-3) showed that the luminescence of complexes were completely quenched (lifetime and emission quantum yield) in water by electron transfer processes, moreover elec. measurements rationalize that Ag nanocomposites exhibit the stronger quenching due to a lower oxidation potential. It also showed a current enhancement associated with double layer charging of the metal nanoparticle cores. The results came from multiple reactions, including the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Related Products of 138219-98-4)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Related Products of 138219-98-4The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2020,New Journal of Chemistry included an article by Romito, Deborah; Biot, Nicolas; Babudri, Francesco; Bonifazi, Davide. Application of 39856-58-1. The article was titled 《Non-covalent bridging of bithiophenes through chalcogen bonding grips》. The information in the text is summarized as follows:

In this work, chalcogen functionalized dithiophenes, equipped on both extremities with chalcogen-bonding recognition heterocycles, have been prepared following two synthetic pathways. The insertion of the chalcogenazolo[5,4-β]pyridine allows the control of the organization at the solid state. X-Ray diffraction anal. of the single crystals, showed that the Te-doped derivatives give the most persistant assemblies, with the mols. arranging at solid-state in wire-like polymeric structures through Te···N interactions. As expected, the introduction of the Se and Te atoms, dramatically decreases the emission properties, with the Te-bearing congeners being virtually non emissive. In the experiment, the researchers used 2-Bromopyridin-3-amine(cas: 39856-58-1Application of 39856-58-1)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Amines characteristically form salts with acids; a hydrogen ion, H+, adds to the nitrogen. With the strong mineral acids (e.g., H2SO4, HNO3, and HCl), the reaction is vigorous. Salt formation is instantly reversed by strong bases such as NaOH. Neutral electrophiles (compounds attracted to regions of negative charge) also react with amines; alkyl halides (R′X) and analogous alkylating agents are important examples of electrophilic reagents.Application of 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2021,Materials Chemistry Frontiers included an article by Luo, Dong; Zuo, Tao; Zheng, Ji; Long, Zi-Hao; Wang, Xue-Zhi; Huang, Yong-Liang; Zhou, Xiao-Ping; Li, Dan. Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine. The article was titled 《Enabling photocatalytic activity of [Ru(2,2′:6′,2′′-terpyridine)2]2+ integrated into a metal-organic framework》. The information in the text is summarized as follows:

As a creation platform for multifunctional materials, crystalline metal-organic frameworks (MOFs) can integrate different chromophores through reticular chem. to adjust their spatial arrangement and intermol. interaction, in turn achieving the purpose of improving the nature of optoelectronic properties. Herein, a stepwise reticular synthesis approach is successfully used to construct a multicomponent MOF, in which the well-known bis-terpyridyl ruthenium chromophore is orderly arranged into the skeleton of the material. Remarkably, this method promotes the excited state lifetime of the bis-terpyridyl ruthenium core, by two orders of magnitude (from 0.39 to 22.09 ns), to the extent that it can produce singlet oxygen under visible light irradiation at room temperature Meanwhile, the obtained multicomponent MOF has been established to have considerable porosity for exposure of substrates to the catalytic sites, rendering it suitable for heterogeneous photocatalysis, including as a photooxidation detoxifier for sulfur mustard simulant. Moreover, DFT and TDDFT calculations reveal that the synergistic charge transfer among different components in the MOF may play a crucial role in improving the excited state properties of the bis-terpyridyl ruthenium motif. After reading the article, we found that the author used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Name: 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kralova, Petra; Malon, Michal; Soural, Miroslav published their research in ACS Combinatorial Science on December 11 ,2017. The article was titled 《Stereoselective Synthesis of Benzo[e][1,4]oxazino[4,3-a][1,4]diazepine-6,12-diones with Two Diversity Positions》.Product Details of 59290-82-3 The article contains the following contents:

Herein, we report a stereoselective formation of tetrahydro-6H-benzo[e][1,4]oxazino[4,3-a][1,4]diazepine-6,12(11H)-diones. Their preparation consisted in solid-phase synthesis of linear intermediates starting from polymer-supported Ser(tBu)-OH. Using various 2-nitrobenzoic acids and bromoketones, the key intermediates were obtained in five steps and subjected to trifluoroacetic acid-mediated cleavage from the resin, followed by stereoselective reduction with triethylsilane. Subsequent catalytic hydrogenation of the nitro group and cyclization yielded the target compounds with full retention of the C12a stereocenter configuration. The experimental part of the paper was very detailed, including the reaction process of 3-Nitroisonicotinic acid(cas: 59290-82-3Product Details of 59290-82-3)

3-Nitroisonicotinic acid(cas: 59290-82-3) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Product Details of 59290-82-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Dong; Lv, Na; Yu, Jiankang; Qiao, Yu; Xue, Xiangxin; Li, Hongji; Che, Guangbo published an article in Journal of Molecular Structure. The title of the article was 《Synthesis, crystal structure and highly sensitive detection property of a fluorescent copper coordination polymer》.Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine The author mentioned the following in the article:

A new luminescent metal-organic framework [Cu(Hbcb)(PYTPY)] (1) (H3bcb = 3,5-bis((5′-carboxylbenzyl)oxy)benzoic acid, PYTPY = 4′-(4-pyridyl)-2,2′:6′,2”-terpyridine) was successfully synthesized and structurally characterized by elemental anal., IR and single crystal x-ray diffraction. Anal. revealed that an infinite one-dimensional ladder chain was created by offset face-to-face π-π stacking interactions between H3bcb and PYTPY. And it exhibits a three-dimensional supramol. structure through the π-π stacking interactions between chains. The thermal stabilities and gas adsorption properties of complex 1 was studied. Complex 1 has good thermal stabilities and selective adsorption properties for CO2. The solid-state luminescent properties of MOFs were measured carefully by UV irradiation at room temperature Most noteworthy, complex 1 exhibits a high sensitivity for Fe3+ and nitrobenzene in ethanol solution with mixed metal ions and aromatic compounds, which makes it be a promising crystalline material as luminescent probe to Fe3+ and nitrobenzene. Importantly, complex 1 can keep its original framework and be reused in sensing experiments The sensing mechanism also was studied. In addition to this study using 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine, there are many other studies that have used 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine) was used in this study.

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Reference of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Putans, Becca A.; Bishop, Lee M.; Hamers, Robert J. published an article in Chemistry of Materials. The title of the article was 《Versatile Approach to Formation of Light-Harvesting Complexes on Nanostructured Metal Oxide Surfaces via “”On-Surface”” Assembly》.Electric Literature of C12H10Cl2N2 The author mentioned the following in the article:

A versatile, two-step “”on-surface”” assembly method is demonstrated to build heteroleptic light-harvesting complexes on nanostructured metal oxide surfaces. In this process, building-block ligands were first attached to SnO2 surfaces by grafting 2,2′-bipyridine mols. that were modified at the (4,4′) positions with surface-reactive binding groups. The surface-bound bipyridine ligands then served as a basis for “”on-surface”” assembly of complete surface-bound Ru(bpy)3 complexes by immersing the bipyridyl-modified samples in a solution containing the complex [Ru(bpy)2(CH3CN)2](PF6)2 and illuminating with UV light, which removes the photolabile acetonitrile ligands and allows the solution-phase complex to react with the surface-bound bipyridine mols. to form complete surface-bound Ru(bpy)3 complexes. We demonstrate that this process is effective using three different surface attachment schemes based on aryl-iodo, benzyl-iodo, and dithione bipyridine derivatives The stability of the complexes in water and the charge transfer characteristics were then measured for the different ligand attachment methods. The benzyl-iodo complex provides the best surface coverage and greatest stability. We also demonstrated that the building-block ligand can act as a site for regeneration of the complexes on the surface. The experimental process involved the reaction of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Electric Literature of C12H10Cl2N2)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Electric Literature of C12H10Cl2N2The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Santos, Jonnatan J.; Toma, Sergio H.; Monezi, Natalia M.; Ando, Romulo A.; Corio, Paola; Araki, Koiti published their research in Inorganic Chemistry on August 5 ,2019. The article was titled 《Selecting the Mechanism of Surface-Enhanced Raman Scattering Effect using Shell Isolated Nanoparticles and an Oxo-Triruthenium Acetate Cluster Complex》.Recommanded Product: 112881-51-3 The article contains the following contents:

After >40 years, surface-enhanced Raman spectroscopy (SERS) stills attract much attention from chemists, not only because of the synthesis of plasmonic nanostructures but also due to the several simultaneous mechanisms which still remain unclear. One of the possibilities for a better understanding of the SERS mechanisms is the use of suitable inorganic complexes. The use of inorganic complexes makes it possible to observe the 2 main SERS mechanisms (electromagnetic and chem.) and to observe the intensification of Raman scattering due to the resonance Raman effect. The observation of these mechanisms was possible using an unpublished and interesting complex with 2 oxo-triruthenium acetate clusters and an Fe bis(terpyridine) in its structure (7 metals) and which interacted with bare Au nanoparticles and shell-isolated Au nanoparticles (SHIN), with a 1 nm SiO2 shell. The use of SHIN allowed quenching the SERS chem. mechanism and led to a spectrum where Fe-terpyridine peaks are absent and only the modes related to [Ru3O] center were observed (due to enhancement by resonance Raman, SERRS); it can be said that the shell-isolated nanoparticles enhanced resonance Raman spectroscopy (SHINERRS) is observed This approach led to a perfect selection of SERS mechanisms never seen before with any other mol./complex. As can be seen in the UV-visible spectrum, this complex has a strong band around 700 nm, which suggests that SiO2 shell enhances only surface-enhanced resonance Raman scattering, a long-distance phenomenon, different from chem. enhancement (a short-distance phenomenon). Along with the Raman spectroscopy results, cyclic voltammetry, UV-visible spectroelectrochem., resonance Raman (using 568 and 676 nm lasers), and d. functional theory calculations of this new Ru cluster are presented. The experimental part of the paper was very detailed, including the reaction process of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3Recommanded Product: 112881-51-3)

4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. Recommanded Product: 112881-51-3The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Kai; Zhou, Zhiming; Song, Jinhong; Bi, Lixue; Shen, Ning; Wu, Yukai; Chen, Fuxue; Wen, Hongliang published their research in Journal of Hazardous Materials on December 15 ,2010. The article was titled 《A metal-free aerobic oxidation of nitrotoluenes catalyzed by N,N’,N”-trihydroxyisocyanuric acid (THICA) and a novel approach to the catalyst》.Safety of 3-Nitroisonicotinic acid The article contains the following contents:

A metal-free catalytic system with N,N’,N”-trihydroxyisocyanuric acid (THICA) as the catalyst for the oxidation of nitrotoluenes is introduced, and a novel Pd-free approach for the synthesis of THICA was developed. In a solution of acetic acid, THICA and concentrated nitric acid, nitrotoluenes especially polynitrotoluenes such as 2,4,6-trinitrotoluene (TNT), were converted into the desired carboxylic acids under 0.2 MPa of O2 at 100 °C with yields up to 99%. THICA was synthesized from N-hydroxyphtalimide through a four-step synthesis in a total yield of 46%. A possible mechanism of this catalytic process was proposed where NO2 and nitric acid first induced a radical of THICA, which then abstracts a hydrogen atom from the Me on the aromatic ring to form a benzyl radical. This radical then initiates subsequent reactions. The production of the benzyl radical was supported by ESR measurements. In the experimental materials used by the author, we found 3-Nitroisonicotinic acid(cas: 59290-82-3Safety of 3-Nitroisonicotinic acid)

3-Nitroisonicotinic acid(cas: 59290-82-3) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Safety of 3-Nitroisonicotinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem