Tag: 200-300

Product Details of 626-05-1In 2021 ,《Rare Fluorescence Red-Shifted Metal-Organic Framework Sensor for Methylamine Derived from an N-Donor Ligand》 was published in Crystal Growth & Design. The article was written by Yao, Shu-Li; Xu, Hui; Zheng, Teng-Fei; Liu, Sui-Jun; Chen, Jing-Lin; Wen, He-Rui. The article contains the following contents:

A three-dimensional (3D) metal-organic framework (MOF) [Cd(bbip)(NDC)]n(JXUST-8, bbip = 2,6-bis(benzimidazol-1-yl)pyridine, and H2NDC = 2,6-naphthalenedicarboxylic acid) with 8-connected bcg topol. was solvothermally synthesized and fully characterized. The fluorescence experiments demonstrate that JXUST-8 could selectively distinguish methylamine (MA) by fluorescence red shift, and the detection limit is 0.341 ppm. It is noteworthy that red shift emission could enlarge the fluorescence signal, which is beneficial to realize sensing. In addition, JXUST-8 performs relatively good thermal stability, chem. stability, and reusability. Importantly, JXUST-8 could be considered as the first example of a bbip-based MOF as well as the second case of a fluorescence red shifted MOF sensor toward MA. In the experiment, the researchers used many compounds, for example, 2,6-Dibromopyridine(cas: 626-05-1Product Details of 626-05-1)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Product Details of 626-05-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of C5H3Br2NIn 2020 ,《Controlling Singlet Fission with Coordination Chemistry-Induced Assembly of Dipyridyl Pyrrole Bipentacenes》 was published in ACS Central Science. The article was written by Ribson, Ryan D.; Choi, Gyeongshin; Hadt, Ryan G.; Agapie, Theodor. The article contains the following contents:

Singlet fission has the potential to surpass current efficiency limits in next-generation photovoltaics and to find use in quantum information science. Despite the demonstration of singlet fission in various materials, there is still a great need for fundamental design principles that allow for tuning of photophys. parameters, including the rate of fission and triplet lifetimes. Here, we describe the synthesis and photophys. characterization of a novel bipentacene dipyridyl pyrrole (HDPP-Pent) and its Li- and K-coordinated derivatives HDPP-Pent undergoes singlet fission at roughly 50% efficiency (τSF = 730 ps), whereas coordination in the Li complex induces significant structural changes to generate a dimer, resulting in a 7-fold rate increase (τSF = 100 ps) and more efficient singlet fission with virtually no sacrifice in triplet lifetime. We thus illustrate novel design principles to produce favorable singlet fission properties, wherein through-space control can be achieved via coordination chem.-induced multipentacene assembly. Series of ligand-bridged bipentacenes display differential rates/yields of singlet fission as a result of distinct solution-state structures arising from the identity of the coordinated alkali metal. In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Electric Literature of C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridines, quinolines, and isoquinolines have found a function in almost all aspects of organic chemistry. Pyridine has found use as a solvent, base, ligand, functional group, and molecular scaffold. As structural elements, these moieties are potent electron-deficient groups, metal-directing functionalities, fluorophores, and medicinally important pharmacophores. Electric Literature of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of C5H3Br2NIn 2021 ,《Electronic and geometric structure effects on one-electron oxidation of first-row transition metals in the same ligand framework》 appeared in Dalton Transactions. The author of the article were Boniolo, Manuel; Chernev, Petko; Cheah, Mun Hon; Heizmann, Philipp A.; Huang, Ping; Shylin, Sergii I.; Salhi, Nessima; Hossain, Kamal Md; Gupta, Arvind K.; Messinger, Johannes; Thapper, Anders; Lundberg, Marcus. The article conveys some information:

Developing new transition metal catalysts requires understanding of how both metal and ligand properties determine reactivity. Since metal complexes bearing ligands of the Py5 family (2,6-bis-[(2-pyridyl)methyl]pyridine) were employed in many fields in the past 20 years, authors set out here to understand their redox properties by studying a series of base metal ions (M = Mn, Fe, Co, and Ni) within the Py5OH (pyridine-2,6-diylbis[di-(pyridin-2-yl)methanol]) variant. Both reduced (MII) and the one-electron oxidized (MIII) species were carefully characterized using a combination of x-ray crystallog., x-ray absorption spectroscopy, cyclic voltammetry, and d.-functional theory calculations The observed metal-ligand interactions and electrochem. properties do not always follow consistent trends along the periodic table. this observation cannot be explained by only considering orbital and geometric relaxation, and spin multiplicity changes needed to be included into the DFT calculations to reproduce and understand these trends. In addition, exchange reactions of the sixth ligand coordinated to the metal, were analyzed. Finally, by including published data of the extensively characterized Py5OMe (pyridine-2,6-diylbis[di-(pyridin-2-yl)methoxymethane])complexes, the special characteristics of the less common Py5OH ligand were extracted This comparison highlights the non-innocent effect of the distal OH functionalization on the geometry, and consequently on the electronic structure of the metal complexes. Together, this gives a complete anal. of metal and ligand degrees of freedom for these base metal complexes, while also providing general insights into how to control electrochem. processes of transition metal complexes. The experimental part of the paper was very detailed, including the reaction process of 2,6-Dibromopyridine(cas: 626-05-1Synthetic Route of C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Synthetic Route of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Gallant, Sarah K.; Tipker, Ryan M.; Glueck, David S. published an article in Organometallics. The title of the article was 《Copper-Catalyzed Asymmetric Alkylation of Secondary Phosphines via Rapid Pyramidal Inversion in P-Stereogenic Cu-Phosphido Intermediates》.Quality Control of 2-(Bromomethyl)pyridine hydrobromide The author mentioned the following in the article:

Development of metal-catalyzed asym. synthesis of P-stereogenic phosphines was guided by the hypothesis that pyramidal inversion occurs rapidly in metal-phosphido intermediates, but this process was not observed directly for all metals of interest. The authors report an enantioselective Cu(Josiphos)-catalyzed alkylation of secondary phosphines and observation of the reaction intermediates, including variable temperature NMR studies of low-barrier pyramidal inversion at P in the key P-stereogenic terminal phosphido complexes Cu(diphos*)(PRR’), and a study of their reversible formation from secondary phosphine-silanolate complexes Cu(diphos*)[PHR(R’)](OSiMe3). The experimental process involved the reaction of 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Quality Control of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Quality Control of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Kazancioglu, Mustafa Z.; Quirion, Kevin; Wipf, Peter; Skoda, Erin M. published an article in 2022. The article was titled 《Enantioselective synthesis and selective functionalization of 4-aminotetrahydroquinolines as novel GLP-1 secretagogues》, and you may find the article in Chirality.Quality Control of 2-(Bromomethyl)pyridine hydrobromide The information in the text is summarized as follows:

Polysubstituted tetrahydroquinolines were obtained in moderate to high yields (28% to 92%) and enantiomeric ratios (er 89:11 to 99:1) by a three-component Povarov reaction using a chiral phosphoric acid catalyst. Significantly, post-Povarov functional group interconversions allowed a rapid access to a library of 36 enantioenriched 4-aminotetrahydroquinoline derivatives featuring five points of diversity. Selected analogs were assayed for their ability to function as glucagon-like peptide-1 (GLP-1) secretagogues. After reading the article, we found that the author used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Quality Control of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine is widely used in the precursor to agrochemicals and pharmaceuticals. Also, it is used as an important reagent and organic solvent.Quality Control of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Nair, Shruthi S.; Bysewski, Oliver A.; Kupfer, Stephan; Waechtler, Maria; Winter, Andreas; Schubert, Ulrich S.; Dietzek, Benjamin published an article in 2021. The article was titled 《Excitation Energy-Dependent Branching Dynamics Determines Photostability of Iron(II)-Mesoionic Carbene Complexes》, and you may find the article in Inorganic Chemistry.COA of Formula: C5H3Br2N The information in the text is summarized as follows:

Photoactive metal complexes containing earth-abundant transition metals recently gained interest as photosensitizers in light-driven chem. In contrast to the traditionally employed ruthenium or iridium complexes, iron complexes developed to be promising candidates despite the fact that using iron complexes as photosensitizers poses an inherent challenge associated with the low-lying metal-centered states, which are responsible for ultrafast deactivation of the charge-transfer states. Nonetheless, recent developments of strongly σ-donating carbene ligands yielded highly promising systems, in which destabilized metal-centered states resulted in prolonged lifetimes of charge-transfer excited states. In this context, we introduce a series of novel homoleptic Fe-triazolylidene mesoionic carbene complexes. The excited-state properties of the complexes were investigated by time-resolved femtosecond transient absorption spectroscopy and quantum chem. calculations Pump wavelength-dependent transient absorption reveals the presence of distinct excited-state relaxation pathways. We relate the excitation-wavelength-dependent branching of the excited-state dynamics into various reaction channels to solvent-dependent photodissociation following the population of dissociative metal centered states upon excitation at 400 nm. In addition to this study using 2,6-Dibromopyridine, there are many other studies that have used 2,6-Dibromopyridine(cas: 626-05-1COA of Formula: C5H3Br2N) was used in this study.

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. COA of Formula: C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2018,ChemistrySelect included an article by Lemouzy, Sebastien; Jean, Marion; Deplante, Fabien; Albalat, Muriel; Herault, Damien; Buono, Gerard. Formula: C6H7Br2N. The article was titled 《Tunable P-Stereogenic P,N-Phosphine Ligands Design: Synthesis and Coordination Chemistry to Palladium》. The information in the text is summarized as follows:

The synthesis of P,N heterobidentate phosphine / palladium complexes was realized from P-stereogenic enantiopure ligands. Five, six or seven membered ring complexes were fully characterized, notably by x-ray diffraction, allowing the study of the chelation to a palladium (II) dichloride unit. The nature of nitrogen coordination site as well as the size of the ring modify the bite-angle at the solid state. In the part of experimental materials, we found many familiar compounds, such as 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Formula: C6H7Br2N)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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.Formula: C6H7Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Computed Properties of C12H10Cl2N2On November 24, 2010 ,《Convenient synthesis of functionalized 4,4′-disubstituted-2,2′-bipyridine with extended π-system for dye-sensitized solar cell applications》 appeared in Tetrahedron Letters. The author of the article were Klein, Cedric; Baranoff, Etienne; Nazeeruddin, Khaja Md.; Graetzel, Michael. The article conveys some information:

Exploration of new ruthenium-based sensitizers for dye-sensitized solar cell (DSC) applications required an easy access to multifunctionalized ligands for efficient screening of sensitizers’ properties. Based on the Horner-Wadsworth-Emmons reaction, a convenient synthetic route for the extension of the π-system on 4,4′-disubstituted-2,2′-bipyridines was used to develop a novel series of functionalized 2,2′-bipyridine ligands, e.g., I (R = CO2C6H13, CO2C8C17, OC6H13, OC8H17), with either electron-withdrawing or donating end-capping groups. The experimental part of the paper was very detailed, including the reaction process of 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Computed Properties of C12H10Cl2N2)

4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4) 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. Computed Properties of C12H10Cl2N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Synthesis of perfluoroalkylated bipyridines – new ligands for oxidation reactions under fluorous triphasic conditions》 was written by Quici, Silvio; Cavazzini, Marco; Ceragioli, Silvia; Montanari, Fernando; Pozzi, Gianluca. Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine And the article was included in Tetrahedron Letters on April 30 ,1999. The article conveys some information:

Fluorous soluble bipyridines bearing two perfluoroalkylated side chains in the 6,6′- or 4,4′-positions have been prepared in good yields via etherification of 6,6′-bis(chloromethyl)-2,2′-bipyridine or C-alkylation of 4,4′-dimethyl-2,2′-bipyridine. The new ligands L exhibit amphiphilic behavior with respect to certain fluorous-organic biphasic systems. Nevertheless, their ruthenium complexes (RuLn)X generated in situ are efficient catalysts for the epoxidation of trans-stilbene in a fluorous triphasic system CH2Cl2/H2O/C8F18 in the presence of NaIO4. The fluorous phase, where (RuLn)X is trapped, can be used up to four times without major loss of catalytic activity. In addition to this study using 4,4′-Bis(chloromethyl)-2,2′-bipyridine, there are many other studies that have used 4,4′-Bis(chloromethyl)-2,2′-bipyridine(cas: 138219-98-4Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine) was used in this study.

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. Application In Synthesis of 4,4′-Bis(chloromethyl)-2,2′-bipyridine Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Synthesis of Diethynyltriptycene-Linked Dipyridyl Ligands》 was written by Kodanko, Jeremy J.; Morys, Anna J.; Lippard, Stephen J.. Recommanded Product: 29682-15-3This research focused ontriptycene pyridylethynyl preparation dinucleating ligand; pyridine bromo dual Sonogashira coupling diethynyltriptycene. The article conveys some information:

An efficient route to a new family of dinucleating ligands has been developed. A convergent strategy to these ligands involved dual Sonogashira cross-coupling of 2,3-diethynyltriptycene with a variety of functionally diverse 5-bromopyridines. The resultant ligands were accessed in four steps and 40-50% overall yields from 1,2,4,5-tetrabromobenzene. Synthesis of an imidazole and a quinoline derivative by this method is also described. The results came from multiple reactions, including the reaction of Methyl 5-bromopicolinate(cas: 29682-15-3Recommanded Product: 29682-15-3)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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.Recommanded Product: 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem