Month: October 2022

Recommanded Product: 3,6-Dibromo-9H-carbazoleIn 2022 ,《Carbazole-siloxane based polymers for the selective detection of 4-nitrophenol and Fe3+》 was published in Journal of Photochemistry and Photobiology, A: Chemistry. The article was written by Wang, Aijing; Tian, Minggang; Zuo, Yujing; Gou, Zhiming. The article contains the following contents:

Silicone-containing polymers have broad application prospects in the detection of many analytes due to their unique fluorescence properties. Environmental pollutants are very complex, which have prompted researchers to explore different detection methods. In this report, two kinds of polymers were synthesized via Heck-reaction between tetramethyltetravinylcyclotetrasiloxane (Dvi4) and carbazole derivatives The polymers showed excellent fluorescent properties and exhibited high sensitivity to 4-nitrophenol (4-NP) and Fe3+ in solution Furthermore, the polymers still showed high sensitivity for Fe3+ in living cells. We estimate that the cyclic structure of Dvi4 and carbazole structure will serve as responsive sites for Fe3+ and 4-NP, resp. The frontier MOs of polymers were calculated by Materials Studio and the effect of the cyclic structure of Dvi4 on their responsiveness had been discussed. The design idea of the polymer sensors can provide a new direction for the synthesis of multi-response polymer fluorescent probes. In the experiment, the researchers used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Recommanded Product: 3,6-Dibromo-9H-carbazole)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Recommanded Product: 3,6-Dibromo-9H-carbazole

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《One-pot synthesis of a white-light emissive bichromophore operated by aggregation-induced dual emission (AIDE) and partial energy transfer》 was written by Denissen, Melanie; Hannen, Ricarda; Itskalov, Dana; Biesen, Lukas; Nirmalananthan-Budau, Nithiya; Hoffmann, Katrin; Reiss, Guido J.; Resch-Genger, Ute; Mueller, Thomas J. J.. Synthetic Route of C12H7Br2NThis research focused onwhite light fluorescence bichromophore aggregation induced emission energy transfer. The article conveys some information:

Merocyanine-triarylamine bichromophores are readily synthesized by sequentially Pd-catalyzed insertion-alkynylation-Michael-Suzuki four-component reactions. White-light emissive systems form upon aggregation in 1 : 99 and 0.1 : 99.9 vol% CH2Cl2-cyclohexane mixtures, ascribed to aggregation-induced dual emission (AIDE) in combination with partial energy transfer between both chromophore units as supported by spectroscopic studies. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Synthetic Route of C12H7Br2N)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Synthetic Route of C12H7Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Catalyst-Transfer Suzuki-Miyaura Condensation Polymerization of Stilbene Monomer: Different Polymerization Behavior Depending on Halide and Aryl Group of ArPd(tBu3P)X Initiator》 were Nojima, Masataka; Kamigawara, Takeru; Ohta, Yoshihiro; Yokozawa, Tsutomu. And the article was published in Journal of Polymer Science, Part A: Polymer Chemistry in 2019. Related Products of 583-69-7 The author mentioned the following in the article:

We report Suzuki-Miyaura coupling polymerization of tetraalkoxy-substituted 4-bromostilbene-4′-boronic acid 1 with several t-Bu3P-ligated Pd initiators; this is the first example of catalyst-transfer condensation polymerization (CTCP) of a monomer containing a carbon-carbon double bond. When o-tolylPd(tBu3P)Br was used as the initiator, the o-tolyl group was not introduced at the polymer end, but polymer with boronic acid at one end and bromine at the other was obtained. However, when we employed stilbenePd(tBu3P)I generated in situ from iodostilbene and Pd(tBu3P)G2 precatalyst, or isolated ArPd(tBu3P)X (Ar, X = Ph, I; o-tolyl, I; and Ph, Br), the aryl group was introduced at the polymer end, indicating that CTCP of 1 proceeded. Therefore, the iodide and aryl group of the Pd initiator complex is crucial for CTCP of 1. However, the mol. weight distribution of the obtained polymer was broad, possibly because coordination of the carbon-carbon double bond of 1 to ArPd(tBu3P)I resulted in slow initiation. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018. After reading the article, we found that the author used 2-Bromobenzene-1,4-diol(cas: 583-69-7Related Products of 583-69-7)

2-Bromobenzene-1,4-diol(cas: 583-69-7) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Related Products of 583-69-7 In contrast, terrestrial plants account only for a few bromine-containing compounds.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《In situ generation of radical initiators using amine-borane complexes for carbohalogenation of alkenes》 were Liautard, Virginie; Delgado, Marine; Colin, Boris; Chabaud, Laurent; Michaud, Guillaume; Pucheault, Mathieu. And the article was published in Chemical Communications (Cambridge, United Kingdom) in 2022. Electric Literature of C4H6BrFO2 The author mentioned the following in the article:

Atom transfer radical addition of alkyl halides to alkenes was developed using a low amount of a stable initiator, amine borane complexes. Thanks to a slow hydroboration step, the overall carbohalogenation process led to good isolated yields. The experimental part of the paper was very detailed, including the reaction process of Ethylbromofluoroacetate(cas: 401-55-8Electric Literature of C4H6BrFO2)

Ethylbromofluoroacetate(cas: 401-55-8) is a member of organofluorine compounds. Organofluorine compounds, which have carbon-fluorine bonds, show unique features such as high thermal and chemical stability, high surface activity, no light-absorbing ability, high pharmacological effect, and so on. Owing to their specific characters, they are indispensable chemicals for industry and our daily lives.Electric Literature of C4H6BrFO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2016,Greulich, Tobias W.; Suzuki, Naoya; Daniliuc, Constantin G.; Fukazawa, Aiko; Yamaguchi, Eriko; Studer, Armido; Yamaguchi, Shigehiro published 《A biphenyl containing two electron-donating and two electron-accepting moieties: a rigid and small donor-acceptor-donor ladder system》.Chemical Communications (Cambridge, United Kingdom) published the findings.Application In Synthesis of 3,5-Dibromoaniline The information in the text is summarized as follows:

Ladder π-conjugated materials and also push-pull systems belong to important classes of compounds for the development of organic electronic devices. In this communication, a novel π-conjugated material that unifies the properties of both of these classes is presented. The material comprises a rigid biphenyl framework, which bears two bridging electron-accepting phosphine oxide moieties as well as two electron-donating amino groups. The structure and photophys. properties of this compound are discussed and compared with those of a related system lacking the second P-moiety. After reading the article, we found that the author used 3,5-Dibromoaniline(cas: 626-40-4Application In Synthesis of 3,5-Dibromoaniline)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. The methylamines occur in small amounts in some plants. Many polyfunctional amines (i.e., those having other functional groups in the molecule) occur as alkaloids in plants—for example, mescaline, 2-(3,4,5-trimethoxyphenyl)ethylamine; the cyclic amines nicotine, atropine, morphine, and cocaine; and the quaternary salt choline, N-(2-hydroxyethyl)trimethylammonium chloride, which is present in nerve synapses and in plant and animal cells.Application In Synthesis of 3,5-Dibromoaniline

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2019,Journal of Photochemistry and Photobiology, A: Chemistry included an article by Heydari, Zahra; Rashidi-Ranjbar, Parviz. Electric Literature of C8H8Br2. The article was titled 《Synthesis and photophysical properties of a new carbazole-based acidochromic molecular switch》. The information in the text is summarized as follows:

A reversible color-changing and fluorescence mol. switch was designed and synthesized based on carbazole fluorophores and amino group receptors. The crab shape mol. 1 is not soluble in most organic solvents and showslow solubility in acetic acid and DMSO (1 mg/mL in DMSO). The solution of 1 in DMSO performed as single on/off switch triggered by acidic protons. The colorless solution in basic and neutral conditions turned to yellow upon addition of a small amount of acid together with quench in fluorescence emission. The solid state of 1 has a dual-mode fluorescence switching property. The creamy white powder of 1has an emission λmax at 398 nm but when exposed to acidic vapors or suspended into acidic mediathe color of the powder changed to yellow and its emission λmax appeared at 516 nm. Monte-Carlo simulation has been performed to search the conformational space of the neutral and acidic forms. The frontier MOs of the most stable conformers has been calculated using DFT/B3LYP method using 6-31 g (d) basis set in attempt to explain the difference in electronic transition of 1 and its porotonated form.1,4-Bis(bromomethyl)benzene(cas: 623-24-5Electric Literature of C8H8Br2) was used in this study.

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals.Electric Literature of C8H8Br2 The most pervasive is the naturally produced bromomethane.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Glucuronidation of Methylated Quercetin Derivatives: Chemical and Biochemical Approaches》 was written by Docampo-Palacios, Maite L.; Alvarez-Hernandez, Anislay; Adiji, Olubu; Gamiotea-Turro, Daylin; Valerino-Diaz, Alexander B.; Viegas, Luis P.; Ndukwe, Ikenna E.; de Fatima, Angelo; Heiss, Christian; Azadi, Parastoo; Pasinetti, Giulio M.; Dixon, Richard A.. Category: bromides-buliding-blocks And the article was included in Journal of Agricultural and Food Chemistry in 2020. The article conveys some information:

Botanical supplements derived from grapes are functional in animal model systems for the amelioration of neurol. conditions, including cognitive impairment. Rats fed with grape extracts accumulate 3′-O-methyl-quercetin-3-O-β-D-glucuronide in their brains, as a potential therapeutic agent. To develop methods for the synthesis of 3′-O-methyl-quercetin-3-O-β-D-glucuronide and the related 4′-O-methyl-quercetin-7-O-β-D-glucuronide, 3-O-methyl-quercetin-3′-O-β-D-glucuronide, and 4′-O-methyl-quercetin-3′-O-β-D-glucuronide, which are not found in the brain, we have evaluated both enzymic semi-synthesis and full chem. synthetic approaches. Biocatalysis by mammalian UDP-glucuronosyltransferases generated multiple glucuronidated products from 4′-O-methylquercetin, and is not cost-effective. Chem. synthetic methods, on the other hand, provided good results; methyl-quercetin-3-O-β-D-glucuronides were obtained in six steps at 12-30% overall yield, resp., while 4 was synthesized in five steps at 34% overall yield. A mechanistic study on the unexpected regioselectivity observed in the quercetin glucuronide synthetic steps is also presented. The results came from multiple reactions, including the reaction of (2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3Category: bromides-buliding-blocks)

(2R,3R,4S,5S,6S)-2-Bromo-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate(cas: 21085-72-3) may be used for the synthesis of HMR1098-S-Glucuronide Methyl Ester, a new K-ATP-blocking agent being developed as a drug for prevention of sudden cardiac death.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《A fast-switching electrochromic device with a surface-confined 3D metallo-organic coordination assembly》 was written by Jena, Satya Ranjan; Choudhury, Joyanta. Application of 4316-58-9 And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:

Demonstrated herein is a fast (<1 s)-switching solid-state electrochromic device (t = 0.49 s for coloration and 0.90 s for bleaching), fabricated with a novel imidazolium-linked [Fe(terpyridine)2]2+ chromophore-based surface-confined three dimensional metallo-organic coordination assembly. The device also exhibits promising electrochromic attributes such as high coloration efficiency (η = 275 cm2 C-1), moderate operating voltage (from -2 V to +3.2 V) and transmittance contrast (ΔT = 40%), and high cycling stability (up to 4500 cycles). The results came from multiple reactions, including the reaction of Tris(4-bromophenyl)amine(cas: 4316-58-9Application of 4316-58-9)

In other references, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Application of 4316-58-9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《One-pot synthesis of star-shaped conjugated oligomers based on 3-hexylthiophene, pyrene and triphenylamine as TNT chemosensors》 was written by Doan, Bao Kim; Tran, Tung Viet Tuan; Nguyen, Tam Huu; Luu, Tam Hoang; Nguyen, Le-Thu T.; Toai, Pham Van; Nguyen, Vuong Mau; Nguyen, Ha Tran. SDS of cas: 4316-58-9 And the article was included in Journal of Photochemistry and Photobiology, A: Chemistry in 2020. The article conveys some information:

Star-shaped conjugated oligomer T3HTP containing pyrene, 3-hexylthiophene and triphenylamine, has been successfully synthesized via a simple one-pot sequential direct arylation process. The chem. structure and optical properties of T3HTP oligomer were characterized via proton NMR (1H-NMR), UV-vis and fluorescence spectroscopies. The results indicated that T3HTP oligomer showed good fluorescence quenching toward TNT, which is useful for identifying explosive nitro aromatic compounds In the experimental materials used by the author, we found Tris(4-bromophenyl)amine(cas: 4316-58-9SDS of cas: 4316-58-9)

In other references, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)SDS of cas: 4316-58-9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Schmidt, Maximilian; Wassy, Daniel; Hermann, Mathias; Gonzalez, M. Teresa; Agraeit, Nicolas; Zotti, Linda A.; Esser, Birgit; Leary, Edmund published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Single-molecule conductance of dibenzopentalenes: antiaromaticity and quantum interference》.HPLC of Formula: 523-27-3 The article contains the following contents:

The effects of antiaromaticity and destructive quantum interference (DQI) are investigated on the charge transport through dibenzo-[a,e]pentalene (DBP). 5,10-Connectivity gives high single-mol. conductance whereas 2,7 gives low conductance due to DQI. Comparison of the 5,10-DBP with Ph and anthracene analogs yields the trend GDBP ≈ GAnth > GPh, despite the aromatic anthracene having a larger HOMO-LUMO gap than 5,10-DBP. This is explained by unfavorable level alignment for 5,10-DBP. After reading the article, we found that the author used 9,10-Dibromoanthracene(cas: 523-27-3HPLC of Formula: 523-27-3)

9,10-Dibromoanthracene(cas: 523-27-3) is synthesized by the bromination of anthracene. The bromination reaction is carried out at room temperature using carbon tetrachloride as a solvent. Using 80-85% anthracene as raw material, adding bromine to react for half an hour, the yield is 83-88%.HPLC of Formula: 523-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary