Day: October 13, 2022

Qian, Yingjie; So, Jaeil; Lee, Myeong Yeon; Hwang, Sosan; Jin, Myung-Jong; Shim, Sang Eun published an article in Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands). The title of the article was 《Synthesis of novel and room temperature-operable palladium complexes on graphene oxide: An efficient recyclable catalyst for Suzuki-Miyaura coupling reactions》.HPLC of Formula: 39856-58-1 The author mentioned the following in the article:

Novel palladium complexes composed of palladium and a conjugated ligand (imine-aldehyde) were immobilized on graphene oxide. The developed catalyst was characterized by XPS, and TEM. The novel catalyst was proven to be highly efficient for the Suzuki-Miyaura coupling reaction of aryl halides (Br, Cl) with arylboronic acids under mild conditions with a low amount of catalyst (0.1 mol%). In particular, excellent yields could be also obtained at room temperature within 1 h for monosubstituted aryl bromide coupling. Furthermore, the novel catalyst could be reused at least ten times without significant loss of its catalytic activities.2-Bromopyridin-3-amine(cas: 39856-58-1HPLC of Formula: 39856-58-1) was used in this study.

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. The reaction of alkyl halides, R―X, where X is a halogen, or analogous reagents with ammonia (or amines) is useful with certain compounds. Not all alkyl halides are effective reagents; the reaction is sluggish with secondary alkyl groups and fails with tertiary ones. Its usefulness is largely confined to primary alkyl halides (those having two hydrogen atoms on the reacting site).HPLC of Formula: 39856-58-1

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Hydrothermal syntheses, structures and properties of a series of new hybrid iodometallates containing rare cross-shaped spirobifluorene derivatives》 was written by Yang, Lili; Zhou, Jian; An, Litao; Cao, Shumei. Formula: C5H6BNO2 And the article was included in Materials Science & Engineering, B: Advanced Functional Solid-State Materials in 2020. The article conveys some information:

A series of new hybrid iodometallates [H4Spiro-4-py]n[Cu7I10]n(I3-)n·0.5(I2)n·nH2O (1), [Cu2I2(Spiro-3-py)]n·0.75n(DMF)·0.25nH2O (2), [H2Spiro-4-py][H3Spiro-4-py][Ag10I20]0.5·H2O (3) and [H2Spiro-4-py]n[H3Spiro-4-py]n[Ag8I13]n·2.5H2O (4) were hydrothermal synthesized. 1 Contains 1-D chain [Cu7I10]n based on new [Cu7I12] cluster, free I3- anions and I2 mols., which are interconnected by weak I···I interactions to generate a novel polyiodide {[Cu7I10](I3-)·(I2)}n framework. 2 Features a neutral sql layer [Cu2I2(Spiro-3-py)]n constructed by the interconnection of the {Cu2I2} dimers and Spiro-3-py ligands. The anionic [Ag10I20]10- framework of 3 can be described as an aggregation of two tetrameric [Ag4I8] clusters and one dimeric [Ag2I6] unit via sharing corner. The 1-D anionic chain [Ag8I5-13]n of 4 is built up from the alternate connection of tetrameric [Ag4I8] units and rare larger [Ag12I20] clusters, which offers the only example of 1-D iodoargentates based on two types of iodoargentate clusters. The optical and photoelectronic properties of all compounds were also studied. In the experiment, the researchers used Pyridin-3-ylboronic acid(cas: 1692-25-7Formula: C5H6BNO2)

Pyridin-3-ylboronic acid(cas: 1692-25-7) 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. Formula: C5H6BNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Liu, Boao; Dang, Feifan; Feng, Zhao; Tian, Zhuanzhuan; Zhao, Jiang; Wu, Yong; Yang, Xiaolong; Zhou, Guijiang; Wu, Zhaoxin; Wong, Wai-Yeung published 《Novel iridium(III) complexes bearing dimesitylboron groups with nearly 100% phosphorescent quantum yields for highly efficient organic light-emitting diodes》.Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published the findings.SDS of cas: 29682-15-3 The information in the text is summarized as follows:

A series of cyclometalated iridium (III) complexes, Ir-B-1, Ir-B-2, Ir-B-3, and Ir-B-4, were synthesized with the 2-phenylpyridine (ppy) type main ligand possessing a dimesitylboron group and the auxiliary ligand containing other main-group element units showing unique charge injection/transporting features. Their thermal stability, photophys. and electrochem. properties, and electroluminescent (EL) performances have been characterized. Time-dependent d. functional theory (TD-DFT) calculations were carried out to study the photophys. properties of these complexes. All these complexes can emit intense orange phosphorescence with extremely high quantum yields of nearly 100% measured in neat films at room temperature Moreover, the solution-processed organic light-emitting devices (OLEDs) using these complexes as orange emitters can show very high EL efficiencies with the maximum luminance efficiency (ηL) of 85.1 cd A-1, corresponding to a power efficiency (ηP) of 69.7 lm W-1 and an external quantum efficiency (ηext) of 28.1%. In the part of experimental materials, we found many familiar compounds, such as Methyl 5-bromopicolinate(cas: 29682-15-3SDS of cas: 29682-15-3)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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.SDS of cas: 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《A new mononuclear zinc(II) complex: Crystal structure, DNA- and BSA-binding, and molecular modeling; in vitro cytotoxicity of the Zn(II) complex and its nanocomplex》 was written by Daryanavard, Marzieh; Jannesari, Zahra; Javeri, Mandana; Abyar, Fatemeh. Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine And the article was included in Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy in 2020. The article conveys some information:

A new mononuclear Zn(II) complex, [Zn(Me2bpy)3](PF6)2·DMF (Me2bpy = 4,4′-dimethyl-2,2′-bipyridine), has been synthesized and fully characterized. Binding studies of the Zn(II) complex with fish sperm DNA (FS-DNA) and bovine serum albumin (BSA) were investigated using cyclic voltammetry, UV-Vis and fluorescence spectroscopies. The results showed that the majority of the interaction modes between the Zn(II) complex and DNA is a combination of the electrostatic and minor groove bindings, and the microenvironment of three aromatic amino acids residues is changed due to the interaction of the Zn(II) complex with BSA. In vitro cytotoxicity studies of the Zn(II) complex and its nanocomplex against three human carcinoma cell lines (MCF-7, A-549, and HT-29) using an MTT assay indicated that the cytotoxicity of both compounds against HT-29 and MCF-7 is higher than A-549. Moreover, the results clearly demonstrated that the aqueous colloid of the Zn(II) nanocomplex is more effective than the complex solution against HT-29 and MCF-7 cells under the same exptl. conditions. The microscopic analyses of the cancer cells showed that the Zn(II) complex apparently induces the cell apoptosis. The interactions of the Zn(II) complex with DNA and BSA were also modeled using mol. docking. The results are in good agreement with the exptl. findings. In the experiment, the researchers used many compounds, for example, 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.Recommanded Product: 4,4′-Dimethyl-2,2′-bipyridine Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhu, Ze-Lin; Chen, Wen-Cheng; Ni, Shao-Fei; Yan, Jie; Wang, Sheng Fu; Fu, Li-Wen; Tsai, Han-Yan; Chi, Yun; Lee, Chun-Sing published their research in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. The article was titled 《Constructing deep-blue bis-tridentate Ir(III) phosphors with fluorene-based dianionic chelates》.Electric Literature of C5H3Br2N The article contains the following contents:

High efficiency and stable blue phosphors have been a persistent pursuit in the field of organic light-emitting diodes (OLEDs). Bis-tridentate Ir(III) complexes are considered as promising alternatives because of their excellent emission efficiency and good photostability. However, the emission colors of photostable bis-tridentate Ir(III) emitters reported so far do not reach the deep blue region. Herein, fluorene is introduced in the design of blue bis-tridentate Ir(III) complexes. By modifying a fluorene-based dianionic chelate with tert-Bu, methoxy, pyrrolidinyl and triazolyl appendages, five blue emitting bis-tridentate Ir(III) phosphors were successfully designed and prepared Emissions of the new phosphors exhibited a gradual blue shift from the sky blue to the deep blue region according to the electron donating abilities of the added substituents. A deep blue OLED was successfully fabricated based on Flu-4 and presented an excellent maximum external quantum efficiency of 22.3% with CIE coordinates of (0.17, 0.19), which are comparable to the state-of-the-art deep blue phosphors. In the experiment, the researchers used 2,6-Dibromopyridine(cas: 626-05-1Electric Literature of C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) 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. Electric Literature of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《A color-tunable single molecule white light emitter with high luminescence efficiency and ultra-long room temperature phosphorescence》 were Ma, Xiao; Jia, Ling; Yang, Baozhu; Li, Jipeng; Huang, Wei; Wu, Dayu; Wong, Wai-Yeung. And the article was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. Synthetic Route of C20H14N4 The author mentioned the following in the article:

Developing organic single mol. white light emitters (SMWLE) with high luminescence efficiency, ultra-long phosphorescence (ULP) and excitation-dependent (ED) color-tunable emission is intriguing and highly desirable from theor. research to practical application. Nevertheless, it is an extremely challenging topic. Here, it is found that three simple terpyridine-based derivatives (P1, P2 and P3) could exhibit unusual multiple emissions and interesting color-tunable emissions. In particular, P3 as the first example could simultaneously achieve bright white light emission with high quantum yield (49%), ultra-long phosphorescence (τ = 0.57 s) and ED color-tunable emission under ambient conditions. Accordingly, it can achieve novel multicolor emission including yellowish green light, white light, blue light, bluish green light and red phosphorescence light in a very wide wavelength range. Both exptl. and theor. studies reveal that such novel emission characteristics are due to the fact that P3 integrates monomer, excimer, and intermol. charge transfer (ICT) triple-mode emissions in the crystalline state. These results provide a rational strategy for the construction of SMWLE and ED color-tunable emission materials. Moreover, such simple multifunctional materials would show huge potential in displays, anti-counterfeiting, and so on. In the experimental materials used by the author, we found 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. 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. Synthetic Route of C20H14N4 Pyridine has a conjugated system of six π electrons that are delocalized over the ring.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Improved antifouling and self-cleaning ability of PVDF ultrafiltration membrane grafted with polymer brushes for oily water treatment》 was written by Pourziad, Sakineh; Omidkhah, Mohammad Reza; Abdollahi, Mahdi. Synthetic Route of C12H12N2 And the article was included in Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) in 2020. The article conveys some information:

This study focuses on the modification of com. polyvinylidene fluoride (PVDF) membranes using surface-initiated atom transfer radical polymerization (SI-ATRP) method. Poly(N-isopropylacrylamide) (PNIPAAm) was grafted from PVDF surface and then PEGMA was grafted onto the PVDF-g-PNIPAAm membrane. The aim of the research was to prepare membranes that simultaneously have antifouling and self-cleaning properties. PNIPAAm (lower block) was grafted to give the membrane temperature sensitive property and PPEGMA (upper block) was used to improve hydrophilicity. Morphol., topog. and chem. composition of the modified membranes were completely characterized. Antifouling and cleaning ability of modified membranes were investigated using synthetic oily water. Moreover, the role of PEGMA polymerization time on the membrane performance was examined PNIPAAm-b-PPEGMA modified membrane achieved 64% decrease in fouling ratio compared to unmodified PVDF membrane at best condition. The flux recovery was 99.1% for modified membrane at this condition. Furthermore, the unmodified PVDF membrane showed 91.1% oil rejection; while the modified membrane could reject 98.2% oil mols. The final flux of all modified membranes were higher than unmodified membrane. These results indicated that PNIPAAm-b-PPEGMA modified membranes have excellent fouling resistance and self-cleaning ability. In the part of experimental materials, we found many familiar compounds, such as 4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6Synthetic Route of C12H12N2)

4,4′-Dimethyl-2,2′-bipyridine(cas: 1134-35-6) is used in the synthesis of a series of o-phenanthroline-substituted ruthenium(II) complexes.Synthetic Route of C12H12N2 Furthermore, 4,4′-Dimethyl-2,2′-bipyridine is used as a chemical Intermediate. It can be used for the determination of ferrous and cyanide compounds.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Emissions from a triphenylamine-benzothiadiazole-monocarbaborane triad and its applications as a fluorescent chemosensor and a white OLED component》 were Peng, Zhixing; Zhang, Kang; Huang, Zongwei; Wang, Zaibin; Duttwyler, Simon; Wang, Yanguang; Lu, Ping. And the article was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2019. Recommanded Product: 4-Ethynylpyridine The author mentioned the following in the article:

A fluorescent D-A-D’ triad (1), composed of monocarbaborane, benzothiadiazole and triphenylamine, was synthesized. By replacing monocarbaborane with Ph, p-methoxyphenyl (PMP), or 4-pyridinyl (Py), 3 analogs were prepared for comparison. Monocarbaborane is an electron donating group based on the comparative anal. of NMR spectra and the systematic study of their photophys. properties. Triad 1 emits bright-yellow light in THF solution with the highest quantum yield and the longest decay time among these compounds It tends to form nanoparticles in aqueous THF solution The in situ generated nanoparticles might be used to detect Ag ions with high sensitivity and high selectivity. By holding the mols. via multiple CH···π interactions and electrostatic forces between the Et4N+ cation and the cage, a sheet-like arrangement of 1 is formed in the solid state with the smallest crystal d. that provides the maximum possibility of mechanofluorochromism from the crystalline to the ground form. By doping 1 in PVK, a white OLED is obtained. Crystallog. data are given. In the experimental materials used by the author, we found 4-Ethynylpyridine(cas: 2510-22-7Recommanded Product: 4-Ethynylpyridine)

4-Ethynylpyridine(cas: 2510-22-7) 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: 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Diketopyrrolopyrrole-based multifunctional ratiometric fluorescent probe and γ-glutamyltranspeptidase-triggered activatable photosensitizer for tumor therapy》 was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2020. These research results belong to Yang, Zhicheng; Xu, Weibo; Wang, Jian; Liu, Lingyan; Chu, Yanmeng; Wang, Yu; Hu, Yue; Yi, Tao; Hua, Jianli. Electric Literature of C6H4N2 The article mentions the following:

Photosensitizers can generate highly reactive oxygen species (ROS) by light excitation, causing cell damage and apoptosis. However, conventional photosensitizers cannot kill cancer cells selectively. In this work, we report a series of diketopyrrolopyrrole (DPP)-based photosensitizers, in which DPP-py with one pyridine group exhibits superior photodynamic killing effect on tumor cells. Furthermore, by introducing 4-bromomethyl-Ph glutamic acid in DPP-py, we adopt a strategy involving the intramol. charge transfer effect to develop a multifunctional DPP-based ratiometric fluorescent probe and activatable photosensitizer DPP-GGT, which can target the tumor-related biomarker γ-glutamyltranspeptidase (γ-GT). DPP-GGT shows highly selective and obvious fluorescent changes from red to yellow for γ-GT. More importantly, DPP-GGT exhibits specific photodynamic killing effects on human hepatic cancer cells HepG2 due to the high activity of endogenous γ-GT but no marked phototoxicity toward low-γ-GT-expressing breast cancer cells MCF-7 or normal hepatocyte cells L02. The results demonstrate that DPP-GGT has great potential for the tumor-specific activatable photodynamic anticancer therapy. The experimental part of the paper was very detailed, including the reaction process of 4-Cyanopyridine(cas: 100-48-1Electric Literature of C6H4N2)

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. Electric Literature of C6H4N2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhang, Guobing; Yu, Hao; Sun, Yue; Wang, Weiwei; Zhao, Yao; Wang, Lichun; Qiu, Longzhen; Ding, Yunsheng published their research in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2021. The article was titled 《Aza-substitution on naphthalene diimide-based conjugated polymers for n-type bottom gate/top contact polymer transistors under ambient conditions》.Reference of 2,5-Dibromopyridine The article contains the following contents:

Four conjugated polymers based on naphthalene diimide (NDI) as the acceptor and thiophene-phenyl-thiophene with different aza-substitutions as co-units were synthesized. The aza-substitution gradually lowered the HOMO (HOMO) and the LUMO (LUMO) energy levels. The polymer with four aza-substitutions exhibited the deepest LUMO/HOMO energy level (-4.10/-6.01 eV). Consequently, organic field-effect transistors (OFETs) based on the bottom-gate/top-contact configuration exhibited unipolar electron transport characteristics even if the devices were exposed directly to ambient conditions. Furthermore, the corresponding devices also maintained their n-type transport behavior during long-term storage in air (>300 days). This work demonstrated that the incorporation of nitrogen atoms into NDI-based conjugated polymers for further lowering the energy levels is a feasible strategy for the construction of air-stable n-type unencapsulated OFETs. After reading the article, we found that the author used 2,5-Dibromopyridine(cas: 624-28-2Reference of 2,5-Dibromopyridine)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem