Tag: M.W=150-200

Fu, Zhiwei; Wang, Xiaoyan; Gardner, Adrian M.; Wang, Xue; Chong, Samantha Y.; Neri, Gaia; Cowan, Alexander J.; Liu, Lunjie; Li, Xiaobo; Vogel, Anastasia; Clowes, Rob; Bilton, Matthew; Chen, Linjiang; Sprick, Reiner Sebastian; Cooper, Andrew I. published the artcile< A stable covalent organic framework for photocatalytic carbon dioxide reduction>, Computed Properties of 366-18-7, the main research area is carbon dioxide photocatalytic reduction stable covalent organic framework.

Photocatalytic conversion of CO2 into fuels is an important challenge for clean energy research and has attracted considerable interest. Here we show that tethering mol. catalysts-a rhenium complex, [Re(bpy)(CO)3Cl]-together in the form of a crystalline covalent organic framework (COF) affords a heterogeneous photocatalyst with a strong visible light absorption, a high CO2 binding affinity, and ultimately an improved catalytic performance over its homogeneous Re counterpart. The COF incorporates bipyridine sites, allowing for ligation of the Re complex, into a fully p-conjugated backbone that is chem. robust and promotes light-harvesting. A maximum rate of 1040μmol g-1 h-1 for CO production with 81% selectivity was measured. CO production rates were further increased up to 1400μmol g-1 h-1, with an improved selectivity of 86%, when a photosensitizer was added. Addition of platinum resulted in production of syngas, hence, the co-formation of H2 and CO, the chem. composition of which could be adjusted by varying the ratio of COF to platinum. An amorphous analog of the COF showed significantly lower CO production rates, suggesting that crystallinity of the COF is beneficial to its photocatalytic performance in CO2 reduction

Chemical Science published new progress about Condensation (physical). 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Computed Properties of 366-18-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Chai, Jingchao; Lashgari, Amir; Wang, Xiao; Jiang, Jianbing Jimmy published the artcile< Extending the redox potentials of metal-free anolytes: towards high energy density redox flow batteries>, SDS of cas: 581-47-5, the main research area is phenylpyridine energy density redox flow battery metal free anolyte.

Non-aqueous organic redox flow batteries (NORFBs) have emerged as a promising technol. for renewable energy storage and conversion. High capacity and power d. can be achieved by virtue of high solubility and high operating voltage of the organic anolytes and catholytes in organic media. However, the lack of anolyte materials with high redox potentials and their poor electrochem. stability retard the wider application of NORFBs. Here, we investigated an evolutionary design of a set of bipyridines and their analogs as anolytes and examined their performance in full fl ow batteries. Using combined techniques of repeated voltammetry, lower scan rate cyclic voltammetry, proton NMR, and d. functional theory calculations, we could rapidly evaluate the redox potential, stability, and reversibility of these redox candidates. The promising candidates, 4-pyridylpyridinium bis(trifl uoromethanesulfonyl)imide (monoMebiPy) and 4,4′-bipyridine (4,4′-biPy), were subjected to battery cycling. Extended studies of the post-cycling electrolytes were conducted to analyze the pathway of capacity fading and revealed a reduction-promoted Me group shift mechanism for monoMebiPy. A family of easily accessible anolyte mols. with high redox stability and redox potentials was discovered that can be applied in NORFBs.

Journal of the Electrochemical Society published new progress about Battery electrolytes. 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, SDS of cas: 581-47-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

De Vos, Arthur; Lejaeghere, Kurt; Muniz Miranda, Francesco; Stevens, Christian V.; Van Der Voort, Pascal; Van Speybroeck, Veronique published the artcile< Electronic properties of heterogenized Ru(II) polypyridyl photoredox complexes on covalent triazine frameworks>, Reference of 366-18-7, the main research area is electronic property heterogenized ruthenium polypyridyl photoredox complex covalent triazine.

Ru(II) polypyridyl complexes have been successful for a wide range of photoredox applications thanks to their efficient light-induced metal-to-ligand charge transfer. Using the computational framework of d.-functional theory, we report how these complexes can be anchored onto covalent triazine frameworks while maintaining their favorable electronic properties. We moreover show that variation of the nitrogen content of the framework linkers or complex ligands endows the heterogenized catalyst with a unique versatility, spanning a wide range of absorption characteristics and redox potentials. By judiciously choosing the catalyst building blocks, it is even possible to selectively guide the charge transfer toward either the scaffold or the accessible pore sites. Rational design of sustainable and efficient photocatalysts thus comes within reach.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Coordination compounds Role: CAT (Catalyst Use), SPN (Synthetic Preparation), TEM (Technical or Engineered Material Use), USES (Uses), PREP (Preparation). 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Reference of 366-18-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Pang, Jia Hao; Kaga, Atsushi; Roediger, Sven; Lin, Min Htoo; Chiba, Shunsuke published the artcile< Revisiting the Chichibabin Reaction: C2 Amination of Pyridines with a NaH-Iodide Composite>, COA of Formula: C10H8N2, the main research area is pyridine preparation Chichibabin.

A NaH-iodide composite was found capable of mediating the Chichibabin amination under mild reaction conditions, allowing efficient access to a range of 2-aminopyridines and their derivatives

Asian Journal of Organic Chemistry published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, COA of Formula: C10H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bedowr, Noha S.; Yahya, Rosiyah B. published the artcile< Synthesis, characterization and thermal stability of binuclear Cu(II) complexes>, Application In Synthesis of 366-18-7, the main research area is copper dodecanoate bipyridine coordination polymer preparation thermal stability.

This research aimed to prepare, characterize and to study thermal properties of the coordination polymers of Cu(II) dodecanoate using ditopic ligands of 2,2′-bipyridine and 4,4′-bipyridine. The freshly prepared Cu(II) complexes were synthesized and characterized by elements composition, functional groups FTIR, UV-visible spectroscopy, magnetic properties, TGA (TGA and DSC) or optical microscopic examination (OPM). Thermally stable Cu(II) dodecanoate complexes were prepared with ditopic ligands of 2,2′-bipyridine and 4,4′-bipyridine for spintronic applications. The exptl. results of the prepared mol. magnets displayed ferromagnetic type of magnetic interactions in the square pyramidal Cu(II) dodecanoate, along with mesomorphic or stable mech. properties.

Journal of Molecular Structure published new progress about Ferromagnetic exchange. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Application In Synthesis of 366-18-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Talik, Tadeusz; Talik, Zofia published the artcile< 2-Fluoronitro-derivatives of pyridine and picolines>, HPLC of Formula: 21901-29-1, the main research area is pyridine fluoro nitro; picoline fluoro nitro; diazotization aminopyridine.

6-Fluoro derivatives from 4-nitro- and 3,5- and 3,4-dinitropyridine, 3- and 5-nitro- and 3,5-dinitro-4-picoline, 3- and 5-nitro- and 3,5-dinitro-2-picoline, and 5-nitro-3-picoline as well as 2-fluoro-5-nitro-3-picoline were prepared in 52.5-85% yields by diazotization of the corresponding amino derivatives in 65% HF.

Roczniki Chemii published new progress about 21901-29-1. 21901-29-1 belongs to class pyridine-derivatives, and the molecular formula is C6H7N3O2, HPLC of Formula: 21901-29-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gudmundsson, Kristjan S.; Hinkley, Jack M.; Brieger, Michael S.; Drach, John C.; Townsend, Leroy B. published the artcile< An improved large-scale synthesis of 2-amino-4-chloropyridine and its use for the convenient preparation of various polychlorinated 2-aminopyridines>, Category: pyridine-derivatives, the main research area is aminochloropyridine preparation chlorination; polychlorinated aminopyridine preparation; pyridine amino polychlorinated preparation.

An efficient large scale synthesis of 2-amino-4-chloropyridine (I) has been achieved through a modification of existing literature procedures. I was used to prepare the previously unreported 2-amino-4,5-dichloropyridine. The known 2-amino-3,4-dichloropyridine and 2-amino-3,4,5-trichloropyridine were prepared from I by new routes and in higher yields than previously reported.

Synthetic Communications published new progress about 188577-68-6. 188577-68-6 belongs to class pyridine-derivatives, and the molecular formula is C5H4Cl2N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Beddoe, Samuel V. F.; Lonergan, Rhona F.; Pitak, Mateusz B.; Price, Jason R.; Coles, Simon J.; Kitchen, Jonathan A.; Keene, Tony D. published the artcile< All about that base: investigating the role of ligand basicity in pyridyl complexes derived from a copper-Schiff base coordination polymer>, Recommanded Product: 2,4-Bipyridine, the main research area is copper hydroxybenzylideneaminophenol pyridine benzimidazole complex preparation; crystal structure copper hydroxybenzylideneaminophenol pyridine benzimidazole complex.

The role of ligand basicity in complex formation was studied using monodentate pyridyls or benzimidazole (mP) in combination with a solution-stable species derived form a coordination polymer, [Cu(L)] (L = 2-(2-hydroxybenzylidene-amino)phenol). The 12 [Cu(L)(mP)n] generated, combined with the {[Cu(L)]2(pP)} complexes from the authors’ previous work (pP is a polypyridyl ligand), allow the authors to gauge the likelihood of complex formation based on the pKa of the conjugate acid of the pyridyl ligands and Hammett parameter, σ. Above pKa ≈ 4.5, complexes are formed where the only ligands are L2- and mP or pP and the packing interactions are predominantly van der Waals. Below this value, complex formation is unlikely unless there are addnl. oxygen ligands in the Jahn-Teller axis of the Cu(II) ion. The structures of two literature [Cu(L)(bP)], where bP is a chelating bidentate pyridyl ligand are also reexamined to resolve the positional disorder in the [Cu(L)] moiety.

Dalton Transactions published new progress about Crystal structure. 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Recommanded Product: 2,4-Bipyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Alijevic, Omar; McHugh, Damian; Rufener, Lucien; Mazurov, Anatoly; Hoeng, Julia; Peitsch, Manuel published the artcile< An electrophysiological characterization of naturally occurring tobacco alkaloids and their action on human α4β2 and α7 nicotinic acetylcholine receptors>, Category: pyridine-derivatives, the main research area is Nicotiana solanaceae tobacco alkaloids nAChR nicotine anabasine anatabine; Anabasine; Anatabine; Nicotiana tabacum; Nicotine; Nornicotine; Solanaceae; Tobacco alkaloids; nAChR; α4β2; α7.

Nicotinic acetylcholine receptor (nAChR) subtype-selective pharmacol. profiles of tobacco alkaloids are essential for understanding the physiol. effects of tobacco products. In this study, automated electrophysiol. was used to functionally characterize the effects of distinct groups of tobacco alkaloids on human α4β2 and α7 nAChRs. We found that, in tobacco alkaloids, pyridine as a hydrogen bond acceptor and a basic nitrogen atom at a distance of 4-7 Å are pharmacophoric elements necessary for mol. recognition by α4β2 and α7 nAChRs with various degrees of selectivity, potency, and efficacy. While four alkaloids-nicotine, nornicotine, anabasine and R-anatabine-potently activated α4β2, they were also weak agonists of α7 nAChRs. Nicotine was the most potent agonist of α4β2, while anabasine elicited the highest activation of α7. None of the tobacco alkaloids enhanced nAChR activity elicited by the endogenous ligand acetylcholine; therefore, none was considered to be a pos. allosteric modulator (PAM) of either α4β2 or α7 nAChRs. In contrast, we identified tobacco alkaloids, such as the tryptophan metabolite 6-hydroxykynurenic acid, that decreased the activity of both α4β2 and α7 nAChRs. Our study identified a class of alkaloids with pos. and neg. effects against human α4β2 and α7 nAChRs. It also revealed human α4β2 to be the principal receptor for sensing the most abundant alkaloids in tobacco leaves.

Phytochemistry (Elsevier) published new progress about Alkaloids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (tobacco alkaloids). 581-47-5 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhang, Bo; Li, Jun; Pang, Ming; Wang, Ying-Shuo; Liu, Meng-Zhen; Zhao, Hui-Meng published the artcile< Four Discrete Silver Iodobismuthates/Bromobismuthates with Metal Complexes: Syntheses, Structures, Photocurrent Responses, and Theoretical Studies>, COA of Formula: C10H8N2, the main research area is silver iodobismuthate bromobismuthate iron nickel complex preparation crystal structure; photocurrent crystal mol structure silver iodobismuthate bromobismuthate iron nickel.

Using in situ formed metal complexes of [Fe(bipy)3]2+ or [Ni(bipy)3]2+ (bipy = 2,2′-bipyridine) as templates, four new Ag-Bi-X (X = I and Br) compounds are first isolated in the metal-complex-decorated heterometallic halobismuthate family, namely [M(bipy)3]AgBiI6 (M = Fe (1), Ni (2)), [Fe(bipy)3]AgBiBr6 (3), and [Ni(bipy)3]AgBiBr6 (4). Compounds 1-4 feature discrete [AgBiX6]n2n- anions, exhibiting three polymorphisms that may be ascribed to the different stackings and the flexible condensations of [BiX6] octahedrons and [AgX4] tetrahedra/[AgX3] triangles. UV-vis diffuse reflectance analyses reveal that they are narrow band gap semiconductor materials (ca. 1.82-2.13 eV). Intriguingly, the title compounds display excellent photoelec. switching properties, with photocurrent d. following the order 3 > 4 > 2 > 1. In addition, the comparative studies of intermol. interactions, theor. band structures, d. of states, and effective masses of three polymorphisms have also been investigated.

Inorganic Chemistry published new progress about Band structure. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, COA of Formula: C10H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem