Tag: 200-300

《Revealing the role of 1,2,4-triazolate fragment of blue-emitting bis-tridentate Ir(III) phosphors: photophysical properties, photo-stabilities, and applications》 was written by Zhu, Z.-L.; Hsu, L.-Y.; Tai, W.-S.; Ni, S.-F.; Lee, C.-S.; Chi, Y.. HPLC of Formula: 626-05-1This research focused ontriazolate bistridentate iridium phosphor photophys property photostability application OLED. The article conveys some information:

Novel bis-tridentate Ir(III) complexes are of great interest in the development of blue-emitting organic light-emitting diodes (OLEDs) due to their rigid and robust mol. architecture. In this work, both the functional 6-pyrazolyl-2-phenoxypyridine (pzyPx) and 6-(1,2,4-triazolyl)-2-phenoxypyridine (tazPx) were used as chromophoric chelates in the construction of the blue-emitting Ir(III) phosphors. Accordingly, the substitution of pzyPx with tazPx chelates retains the desired characteristics, i.e. both high quantum yields (>92%) in solution and shortened radiative lifetime (τrad) (from 19.8 to 2.5 μs), resp. The theor. calculation reveals that the triazolate moiety contributes considerably to the radiative transition, to which the greater iridium involvement in T1 → S0 transition of tazPx-based complex is responsible for the shortened τrad. Consequently, enhanced photostabilities in degassed toluene and competitive performances with maximum EQE of 19.2% with CIE coordinates of (0.17, 0.22) were observed from the tazPx-based complex Px-33. In the part of experimental materials, we found many familiar compounds, such as 2,6-Dibromopyridine(cas: 626-05-1HPLC of Formula: 626-05-1)

2,6-Dibromopyridine(cas: 626-05-1) 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.HPLC of Formula: 626-05-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Facile synthesis of extended TPA-quinazolinone derivatives and the nonlinear optical properties》 was written by Zheng, Mingming; Zhang, Jiuming; Wang, Wenbiao; Gao, Jianrong; Jia, Jianhong. SDS of cas: 624-28-2This research focused ontriphenylamine quinazolinone derivative synthesis Suzuki cross coupling reaction; fluorescence photophys nonlinear optical property. The article conveys some information:

In this work, four new quinazolinone (QZ)-based compounds containing triphenylamine (TPA) moiety have been synthesized, defined as QZC, QZC-1, QZC-2, QZC-3, for the application of third-order nonlinear optical (NLO) responses. A new design of two-step synthesis has been put forward, the first step is Ullmann reaction with QZ, and the second is connecting QZ and the substituted triphenylamines (TPAs) through a Suzuki cross-coupling reaction to afford the target products. Electrochem. measurement data indicated that the tuning of the HOMO and LUMO energy levels can be easily achieved by introducing and modifying the donor moiety. The NLO properties were evaluated by the Z-scan technique which showed that introduction of a benzene ring as a π bridge could reduce the transmission energy of electrons from a ground state to an excited state, and the added methoxy in TPA moiety could promote the ICT, and improve the third-order NLO properties of mols. Theor. calculations matched well with the electrochem. information and NLO information. The results suggest that the materials based on QZ have potential applications in integrated NLO devices. In the experiment, the researchers used 2,5-Dibromopyridine(cas: 624-28-2SDS of cas: 624-28-2)

2,5-Dibromopyridine(cas: 624-28-2) 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.SDS of cas: 624-28-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2-(Bromomethyl)pyridine hydrobromideIn 2022 ,《Group 12 metal complexes of mixed thia/aza and thia/oxa/aza macrocyclic ligands》 was published in Polyhedron. The article was written by Hodorogea, Ana Maria; Silvestru, Anca; Lippolis, Vito; Pop, Alexandra. The article contains the following contents:

The coordination behavior of the macrocyclic ligands N-(2-pyridylmethyl)-[12]aneNS2O (L1) and N-(2-pyridylmethyl)-[12]aneNS3 (L2) ([12]aneNS2O = 1-aza-4,10-dithia-7-oxacyclododecane, [12]aneNS3 = 1-aza-4,7,10-trithia-cyclododecane) was studied in complexation reactions with ZnCl2, CdI2 and HgCl2. The NMR and mass spectra suggest the formation of the ionic species [LMX]2[MX4] [M = Zn, X = Cl, L = L1 (1), L2 (2); M = Cd, X = I, L = L1 (3), L2 (4); M = Hg, X = Cl, L = L1 (5), L2 (6)]. The x-ray diffraction studies confirmed the formation of the new species 3-6, with [LMX]+ cations and [MX4]2- anions, while for the zinc(II) complex 1 the determined structure corresponds to the hydrolysis product of formula [L1Zn]2[ZnCl3]2[Zn2Cl6]·2H2O (1h), with [L1Zn(H2O)]2+ cations and [ZnCl3(H2O)]- and [Zn2Cl6]2- anions. In all complexes the metal ion is hexacoordinated in cations, while in anions the metal is tetrahedrally surrounded by halido ligands. In addition to this study using 2-(Bromomethyl)pyridine hydrobromide, there are many other studies that have used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Application In Synthesis of 2-(Bromomethyl)pyridine hydrobromide) was used in this study.

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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. Application In Synthesis of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 2,6-DibromopyridineIn 2020 ,《Tuning Second Coordination Sphere Interactions in Polypyridyl-Iron Complexes to Achieve Selective Electrocatalytic Reduction of Carbon Dioxide to Carbon Monoxide》 was published in Inorganic Chemistry. The article was written by Zee, David Z.; Nippe, Michael; King, Amanda E.; Chang, Christopher J.; Long, Jeffrey R.. The article contains the following contents:

The development of noble-metal-free catalysts capable of electrochem. converting CO2 (CO2) selectively into value-added compounds remains one of the central challenges in catalysis research. Here, the authors present a systematic study of Fe(II) complexes of the functionalized ligands bpyRPY2Me (bpyPY2Me = 6-(1,1-bis(pyridin-2-yl)ethyl)-2,2′-bipyridine) in the pursuit of H2O-stable mol. Fe complexes that are selective for the catalytic formation of CO from CO2. Taking advantage of the inherently high degree of tunability of this ligand manifold, the authors followed a bioinspired approach by installing protic functional groups of varying acidities (-H, -OH, -OMe, -NHEt, and -NEt2) into the ligand framework to systematically modify the 2nd coordination sphere of the Fe center. This family of [(bpyRPY2Me)FeII] complexes was characterized using single-crystal x-ray anal., 1H NMR spectroscopy, and mass spectrometry. Comparative catalytic evaluation of this set of compounds via voltammetry and electrolysis experiments identified [(bpyNHEtPY2Me)Fe]2+ in particular as an efficient, Fe-based, nonheme CO2 electroreduction catalyst that displays significant selectivity for the conversion of CO2 to CO in MeCN solution with 11 M H2O. Probably the NH group acts as a local proton source for cleaving the C-O bond in CO2 to form CO. The complex with the most acidic functional group in the 2nd coordination sphere, [(bpyOHPY2Me)Fe]2+, favors formation of H2 over CO. The authors’ results correlate the selectivity of H2O vs. CO2 reduction to the acidity of the 2nd coordination sphere functional group and emphasize the continued untapped potential that synthetic mol. chem. offers in the pursuit of next-generation CO2 reduction electrocatalysts. The 2nd coordination sphere is systematically altered in polypyridyl-Fe(II) complexes, [(bpyRPY2Me)FeII]2+, with protic functional groups of varying acidities (R = -H, -OH, -OMe, -NHEt, -NEt2). [(BpyNHEtPY2Me)Fe]2+ is an efficient CO2 electroreduction catalyst that is selective for the conversion of CO2 to CO in MeCN solution with 11 M H2O. The complex with the most acidic functional group in the 2nd coordination sphere, [(bpyOHPY2Me)Fe]2+, favors formation of H2 over CO. The results came from multiple reactions, including the reaction of 2,6-Dibromopyridine(cas: 626-05-1Reference of 2,6-Dibromopyridine)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Reference of 2,6-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 2,6-DibromopyridineIn 2020 ,《Synthesis of Pyridylsulfonium Salts and Their Application in the Formation of Functionalized Bipyridines》 appeared in Organic Letters. The author of the article were Duong, Vincent K.; Horan, Alexandra M.; McGarrigle, Eoghan M.. The article conveys some information:

An S-selective arylation of pyridylsulfides with good functional group tolerance was developed. To demonstrate synthetic utility, the resulting pyridylsulfonium salts were used in a scalable transition-metal-free coupling protocol, yielding functionalized bipyridines with extensive functional group tolerance. This modular methodol. permits selective introduction of functional groups from com. available pyridyl halides, furnishing sym. and unsym. 2,2′- and 2,3′-bipyridines. Iterative application of the methodol. enabled the synthesis of a functionalized terpyridine with three different pyridine components. In the experimental materials used by the author, we found 2,6-Dibromopyridine(cas: 626-05-1Recommanded Product: 2,6-Dibromopyridine)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Recommanded Product: 2,6-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 2-(Bromomethyl)pyridine hydrobromideIn 2019 ,《Iron(II) tetrafluoroborate complexes of new tetradentate C-scorpionates as catalysts for the oxidative cleavage of trans-stilbene with H2O2》 appeared in Dalton Transactions. The author of the article were Wang, Denan; Gardinier, James R.; Lindeman, Sergey V.. The article conveys some information:

Attachment of a 2-methylpyridyl group onto the unique 1-nitrogen atom on nitrogen-confused C-scorpionates with either pyrazol-1-yl or 3,5 dimethylpyrazol-1-yl donors gives two new cis-directing tetradentate-N4 ligands (L and L*). The complexes [(L or L*)Fe(CH3CN)2](BF4)2 (1 or 2) were prepared, fully characterized, and investigated for their ability to catalyze the oxidative cleavage of trans-stilbene in CH3CN. Complexes 1 and 2 are capable of catalyzing stilbene cleavage when H2O2 is used as an oxidant but up to six different products are formed, with C:C cleavage products (benzaldehyde and benzoic acid) dominating over four products of oxygen transfer. Catalytic amounts of 1 or 2 enhance the ability for the organic photocatalyst riboflavin tetraacetate to use atm. oxygen and blue light irradiation (450-460 nm) to selectively cleave stilbene to benzaldehyde. However, when benzaldehyde oxidizes further to benzoic acid, the iron species begin giving increasing amounts of stilbene oxygenation products.2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Reference of 2-(Bromomethyl)pyridine hydrobromide) was used in this study.

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Reference of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 2-(Bromomethyl)pyridine hydrobromideIn 2016 ,《Synthesis and structural analyses of phenylethynyl-substituted tris(2-pyridylmethyl)amines and their copper(II) complexes》 appeared in Dalton Transactions. The author of the article were Lim, Jaebum; Lynch, Vincent M.; Edupuganti, Ramakrishna; Ellington, Andrew; Anslyn, Eric V.. The article conveys some information:

Three new tris(2-pyridylmethyl)amine-based ligands possessing phenylethynyl units were prepared using Sonogashira couplings and substitution reactions. Copper(II) complexes (I) of those tetradentate ligands also were synthesized. Solid-state structures of the six new compounds were determined by single-crystal x-ray diffraction analyses. Examination of the mol. structures of the ligands revealed the expected triangular geometries with virtually undeformed carbon-carbon triple bonds. While the tertiary nitrogen of the free ligands seem to be prevented from participation in supramol. noncovalent interactions by the pyridyl hydrogen at the 3-position, the pyridyl nitrogens play a crucial role in the packing mode of the crystal structure. The nitrogens form weak hydrogen bonds, varied at 2.32-2.66 Å, with the pyridyl hydrogen of its neighboring mol. The [N···H-C] contacts enforce one-dimensional columnar assemblies on ligands that organize into wall-like structures, which in turn assemble into three-dimensional structures through CH-π interactions. Structural analyses of Cu(II) complexes of the ligands revealed propeller-like structures caused by steric crowding of three pyridine ligands. The copper complexes of the ligands having three phenylethynyl substituents showed a remarkably deformed carbon-carbon triple bond enforced by a steric effect of the three Ph groups. Most significantly, a total of seventy noncovalent interactions, classified into twelve types of hydrogen-involving short contacts, were identified. The phenylethynyl substituent participated in forty-two interactions as a hydrogen bond acceptor, and its role was more distinctive in the crystal structures of the Cu(II) complexes. In the experiment, the researchers used many compounds, for example, 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Reference of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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.Reference of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Becker, Mariia; Wyss, Vanessa; Housecroft, Catherine E.; Constable, Edwin C. published an article in 2021. The article was titled 《The influence of alkyl chains on the performance of DSCs employing iron(II) N-heterocyclic carbene sensitizers》, and you may find the article in Dalton Transactions.Related Products of 626-05-1 The information in the text is summarized as follows:

The photovoltaic performances of DSCs employing two new iron(II) N-heterocyclic carbene (NHC) sensitizers are presented. The presence of Bu side chains had a significant impact on DSC performace. The improvement in DSC performance up to 0.93-0.95% was observed for a new heteroleptic sensitizer bearing one carboxylic acid anchoring group. The photovoltaic performance was remarkably affected by sensitization time and by a presence/absence of coadsorbent on the semiconductor surface. The highest photoconversion efficiencies (PCE) were achieved for DSCs sensitized over 17.5 h without addition of coadsorbents. However, for a shorter dipping time of 4 h, the presence of chenodeoxycholic acid improved the PCE from 0.46% (no coadsorbents) to 0.74%, resp. The performance of DSCs based on a new homoleptic complex bearing two Bu side chains and a carboxylic acid anchor on each NHC-ligand was improved from 0.05 to 0.29% via changes in dye-bath concentration and sensitization time. The changes in the dye load on the semiconductor surface depending on the sensitization conditions were confirmed using solid-state UV-Vis spectroscopy and thermogravimetric anal. Electrochem. impedance spectroscopy was used to gain information about the processes occurring at the different interfaces in the DSCs. The impedance response was strongly affected by the immersion time of the photoanodes in the dye-bath solutions In the case of the homoleptic iron(II) complex, a Gerischer impedance was observed after 17.5 h immersion. Shorter dipping times resulted in a decrease in the resistance in the system. For the heteroleptic complex, values of the chem. capacitance and electron lifetime were affected by the immersion time. However, the diffusion length was independent of sensitization conditions. In the experiment, the researchers used many compounds, for example, 2,6-Dibromopyridine(cas: 626-05-1Related Products of 626-05-1)

2,6-Dibromopyridine(cas: 626-05-1) 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.Related Products of 626-05-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Paymode, Dinesh J.; Chang, Le; Chen, Dan; Wang, Binglin; Kashinath, Komirishetty; Gopalsamuthiram, Vijayagopal; McQuade, D. Tyler; Vasudevan, N.; Ahmad, Saeed; Snead, David R. published their research in Organic Letters in 2021. The article was titled 《Application of Vinamidinium Salt Chemistry for a Palladium Free Synthesis of Anti-Malarial MMV048: A “”Bottom-Up”” Approach》.Product Details of 624-28-2 The article contains the following contents:

MMV390048 is a clin. compound under investigation for antimalarial activity. A new synthetic route was developed which couples two aromatic fragments while forming the central pyridine ring over two steps. This sequence takes advantage of raw materials used in the existing etoricoxib supply chain and eliminates the need for palladium catalysts, which were projected to be major cost-drivers. In the experimental materials used by the author, we found 2,5-Dibromopyridine(cas: 624-28-2Product Details of 624-28-2)

2,5-Dibromopyridine(cas: 624-28-2) 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. Product Details of 624-28-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Mitochondria-localized iridium(III) complexes with anthraquinone groups as effective photosensitizers for photodynamic therapy under hypoxia》 were Guo, Song; Han, Meiping; Chen, Ruizhe; Zhuang, Yanling; Zou, Liang; Liu, Shujuan; Huang, Wei; Zhao, Qiang. And the article was published in Science China: Chemistry in 2019. Electric Literature of C5H3Br2N The author mentioned the following in the article:

Photodynamic therapy (PDT) is a potential way for the tumor treatment. However, it notably suffers the limitation of hypoxia in solid tumors. Thus, it is significant to develop effective photosensitizers which can exhibit excellent therapeutic performance under both normoxia and hypoxia. Herein, we reported four ionic iridium(III) complexes (Ir1-Ir4) with anthraquinone groups which can regulate their excited state energy levels effectively. Among them, the energy gap of Ir1 was between 1.63 and 2.21 eV, which can match well with that of O2, and the HOMO energy of Ir1 is less than -5.51 eV. Compared with Ir2-Ir4, the luminescent quantum efficiency of Ir1 was the highest. Particularly, Ir1 can specifically target the mitochondria of the tumor cells. Meanwhile, Ir1 showed high singlet oxygen quantum yields (φΔ) in both solutions and living cells with low cytotoxicity. The results of PDT experiments revealed that Ir1, as a photosensitizer, exhibited excellent therapeutic effect not only in normoxia but also in hypoxia condition. We believe that this work is meaningful for developing excellent PDT agents based on cyclometalated Ir(III) complexes via rational ligand modification. In the experiment, the researchers used many compounds, for example, 2,5-Dibromopyridine(cas: 624-28-2Electric Literature of C5H3Br2N)

2,5-Dibromopyridine(cas: 624-28-2) 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.Electric Literature of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem