Month: October 2022

Zhang, Chi; Fan, Zhinan; Zhan, Hao; Zhou, Hong; Ma, Rongliang; Fan, Li-Juan published an article in 2021. The article was titled 《Fluorescent Cationic Conjugated Polymer-Based Adaptive Developing Strategy for Both Sebaceous and Blood Fingerprints》, and you may find the article in ACS Applied Materials & Interfaces.Recommanded Product: 629-03-8 The information in the text is summarized as follows:

Both latent sebaceous and blood fingerprints may provide valuable information for forensic investigation. To detect both types of fingerprints with no need to predistinguish them, a new adaptive developing strategy was proposed. A cationic conjugated polymer with poly[p-(phenylene ethylene)-alt-(thienylene ethynylene)] backbone (PPETE-NMe3+) was synthesized, which was dissolved in N,N-dimethylformamide (DMF) to form the developing solution Fingerprints were developed by a simple dropping and incubating process without any pre-/post-treatments. Fluorescent photographs of the developed fingerprints on various substrates demonstrated that this developing strategy was effective for both types of fingerprints on nonporous substrates. Gray value anal. further confirmed the enhancement of the legibility of the fingerprint images. The preliminary mechanism exploration suggested that certain weak interactions, such as hydrophobic interaction and electrostatic interaction, may synergistically contribute to the interaction between the polymer and fingerprint components. The mol. design of the polymer combined with an appropriate solvent endowed the developing system the adaptiveness toward different types of fingerprints. This adaptive developing strategy made the fingerprint-developing process more efficient and may be further extended to more practical application scenes.1,6-Dibromohexane(cas: 629-03-8Recommanded Product: 629-03-8) was used in this study.

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Recommanded Product: 629-03-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yang, Qian; Zhu, Ji-Chun; Li, Zhen-Xing; Chen, Xiao-Shuai; Jiang, Yu-Xing; Luo, Zhi-Wang; Wang, Ping; Xie, He-Lou published an article in 2021. The article was titled 《Luminescent Liquid Crystals Based on Carbonized Polymer Dots and Their Polarized Luminescence Application》, and you may find the article in ACS Applied Materials & Interfaces.Recommanded Product: 1,6-Dibromohexane The information in the text is summarized as follows:

Traditional luminescent liquid crystals (LLCs) suffer from fluorescence quenching caused by aggregation, which greatly limits their further application. In this work, a kind of novel LLCs (named carbonized polymer dot liquid crystals (CPD-LCs)) are designed and successfully synthesized through grafting the rod-shaped liquid crystal (LC) mols. of 4′-cyano-4-(4”-bromohexyloxy) biphenyl on the surface of CPDs. The peripheral LC mols. not only increase the distance between different CPDs to prevent them from aggregating and reduce intermol. energy resonance transfer but also make this LLC have an ordered arrangement. Thus, the obtained CPD-LCs show good LC property and excellent high luminous efficiency with an absolute photoluminescence quantum yield of 14.52% in the aggregated state. Furthermore, this kind of CPD-LC is used to fabricate linearly polarized devices. The resultant linearly polarized dichroic ratio (N) and polarization ratio (ρ) are 2.59 and 0.44, resp. Clearly, this type of CPD-LC shows promising applications for optical devices. In addition to this study using 1,6-Dibromohexane, there are many other studies that have used 1,6-Dibromohexane(cas: 629-03-8Recommanded Product: 1,6-Dibromohexane) was used in this study.

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Recommanded Product: 1,6-Dibromohexane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wu, Zhenyu; Li, Xinke; Zhao, Yu; Li, Yi; Wei, Kaiqiang; Shi, Hong; Zhang, Tianyang; Huang, Hui; Liu, Yang; Kang, Zhenhui published an article in 2021. The article was titled 《Organic Semiconductor/Carbon Dot Composites for Highly Efficient Hydrogen and Hydrogen Peroxide Coproduction from Water Photosplitting》, and you may find the article in ACS Applied Materials & Interfaces.COA of Formula: C14H8Br2 The information in the text is summarized as follows:

Coprodn. of hydrogen (H2) and hydrogen peroxide (H2O2) from water splitting is one of the most promising ways to alleviate the energy crisis and environmental pollution. Here, we first show the synthesis and photocatalytic property of an organic semiconductor (DAnTMS compound) from 9,10-dibromoanthracene and trimethylsilylacetylene. Then, a metal-free photocatalyst of a DAnTMS/carbon dot (DAnTMS/CD) composite was designed and fabricated, which achieved the efficient photocatalytic production of H2 and H2O2 without usage of any organic solvents and sacrificial agents. Under visible light, the DAnTMS/CD composite could produce H2O2 with a maximum rate of 396.7 μmol g-1 h-1 and H2 with a maximum rate of 365.0 μmol g-1 h-1 in pure water. Transient photovoltage tests showed that CDs changed the interface electron transfer kinetics and served as the active site for highly efficient H2 evolution. This work provided a deep insight into the function of CDs in regulating the catalytic property of organic photocatalysts. After reading the article, we found that the author used 9,10-Dibromoanthracene(cas: 523-27-3COA of Formula: C14H8Br2)

9,10-Dibromoanthracene(cas: 523-27-3) is a dibrominated polycyclic aromatic hydrocarbon (PAH). 9,10-Dibromoanthracene is often used as an energy acceptor and activator in reactions that produce chemiluminescence.COA of Formula: C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Yan, Qiwen; Mao, Lina; Feng, Bang; Zhang, Lidong; Wu, Yiqian; Huang, Wei published an article in 2021. The article was titled 《Reversible Patterning Cross-Linked, Humidity-Responsive Polymer Films with Programmatically and Accurately Controlled Deformation》, and you may find the article in ACS Applied Materials & Interfaces.Safety of 1,6-Dibromohexane The information in the text is summarized as follows:

A series of novel humidity-responsive and photosensitive polymer films (PCA-PAA-PEG) are prepared These films can be patterning crosslinked by the photodimerization of coumarin pendant groups. The humidity-induced deformation can be well controlled by the pattern because of the different modulus and hydrophilicity between crosslinked and un-crosslinked segments. In addition, the pattern can be erased and the deformation direction can be changed programmatically by the de-crosslinking-re-crosslinking approach due to the reversible photodimerization of coumarin groups. The crosslinking degree also affects the humidity responsiveness of the film. The deformation of the gradient patterning crosslinked film can be more accurately controlled. Moreover, the length and width ratio (L/Ws/Wh) of the un-crosslinked segment to the crosslinked segment affects the deformation of the films as well. When L/Ws/Wh is 5/2/1 or 5/3/1, the deformation is controllable, and when L/Ws/Wh is 5/1/1 or 5/4/1, the deformation is random at the initial stage, but the whole film will bend along the short axis in the end. In addition to this study using 1,6-Dibromohexane, there are many other studies that have used 1,6-Dibromohexane(cas: 629-03-8Safety of 1,6-Dibromohexane) was used in this study.

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of pyrrolo-tetrathiafulvalene molecular bridge (6PTTF6) to study redox switching behavior of single molecules; synthesis of water-soluble thermoresponsive polylactides.Safety of 1,6-Dibromohexane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jia, Xuhong; Huang, Rui; Yang, Xiaoguang; Tao, Wan; Zhu, Xinhua published an article in 2021. The article was titled 《Synthesis and Characterization of a Novel Class of Zwitterionic Fluorocarbon Surfactants Based on Perfluorobutyl》, and you may find the article in Tenside, Surfactants, Detergents.Formula: C4H7BrO2 The information in the text is summarized as follows:

Perfluorooctane sulfonate (PFOS) and its derivatives had been banned due to their potential environmental hazards, although they possessed excellent surface activity. An effective method to solve this problem was to shorten the fluorocarbon chain of these surfactants from C8H17 to C4F9. As previous studies had shown, zwitterionic surfactants possess higher surface activity but have lower toxicity compared to other types of surfactants. In view of this, a class of novel zwitterionic fluorocarbon surfactants (n-CFNA-Br) with perfluorobutyl moiety was synthesized in this work. Their structures were characterized by FTIR, 1H NMR, 13C NMR, 19F NMR and MS. The results showed that all synthesized n-CFNA-Br had almost the same min. surface tension, but their critical micelle concentration (CMC) decreased with increasing length of hydrophobic carbon chain. In pure water, the surface tension at the CMC (γCMC) of the four n-CFNA-Br were about 20 mN/m, and the CMC values were 7.73 mmol/L for 1-CFNA-Br, 4.70 mmol/L for 2-CFNA-Br, 4.13 mmol/L for 3-CFNA-Br, and 3.36 mmol/L for 4-CFNA-Br, indicating high efficiency and effectiveness. In 0.1 mol/L NaCl, the CMC values reduced to less than half of the CMC values measured in the pure aqueous surfactant solution, while the surface tensions γCMC remained almost unchanged, indicating good salinity tolerance of the synthesized surfactants. The acidic surfactant solutions exhibited similar CMC values to the saline solutions, but the surface tension γCMC increased slightly to 25 mN/m. However, further investigation showed that the n-CFNA-Br surfactants exhibited poor surface activity in alk. solution (0.1 mol/L NaOH). In the pH range of 6.6 to 10.4, white precipitates appeared in the surfactant solutions after some time, indicating that the n-CFNA-Br are not suitable for use in alk. systems with pH greater than 6.6. In the experiment, the researchers used many compounds, for example, 4-Bromobutanoic acid(cas: 2623-87-2Formula: C4H7BrO2)

4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Formula: C4H7BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Qianqian; Huo, Suhong; Meng, Lingpeng; Li, Xiaoyan published an article in 2022. The article was titled 《Mechanism and origin of the stereoselectivity of manganese-catalyzed hydrosilylation of alkynes: a DFT study》, and you may find the article in Catalysis Science & Technology.Recommanded Product: Bromopentacarbonylmanganese(I) The information in the text is summarized as follows:

The manganese-catalyzed hydrosilylation reaction provides a powerful platform to synthesize organosilicon compounds due to their rich reserves, low toxicity, and promising novel reactivity. In this work, the detailed mechanisms of the manganese-catalyzed hydrosilylation of alkynes using the mononuclear Mn(CO)5Br and binuclear Mn2(CO)10 have been systematically investigated and compared by DFT calculations The mononuclear Mn(CO)5Br-catalyzed hydrosilylation of alkynes belongs to an organometallic mechanism. The computational results indicate that the proposed organometallic catalytic cycle in the early literature cannot completely explain the exptl. results due to the high energy barrier involved. A novel catalytic mechanism, in which the CO firstly dissociates from Mn(CO)4BrL, provides an explanation to the studied reaction. E-pro is the main product of the mononuclear Mn(CO)5Br-catalyzed hydrosilylation of alkynes. Meanwhile, the Mn2(CO)10-catalyzed cycle occurs via radical mechanism, and Z-pro is obtained due to the steric effect. In both mononuclear Mn(CO)5Br and binuclear Mn2(CO)10-catalyzed cycles, the substituted alkyne addition process is the rate-determining step. Our calculated results provide deep insight into and amend the mechanistic details for the significant manganese-catalyzed hydrosilylation of alkyne, which is expected to be informative for the effective utilization of Mn catalysts and stereoselective control of alkyne functionalization reactions. In addition to this study using Bromopentacarbonylmanganese(I), there are many other studies that have used Bromopentacarbonylmanganese(I)(cas: 14516-54-2Recommanded Product: Bromopentacarbonylmanganese(I)) was used in this study.

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Recommanded Product: Bromopentacarbonylmanganese(I)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Wei; Luo, Yang; Jia, Meng-Hao; Ni, Xin-Long; Tao, Zhu; Xiao, Chao-Da; Xiao, Xin published an article in Sensors and Actuators, B: Chemical. The title of the article was 《An efficient supramolecular artificial light-harvesting system based on twisted cucurbit[15]uril and cucurbit[10]uril for live cell imaging》.Electric Literature of C14H8Br2 The author mentioned the following in the article:

The construction of highly efficient artificial light-harvesting systems in aqueous solutions is still challenging. Herein, we reported a new light-harvesting system based on the supramol. combination of twisted cucurbit[15]uril (tQ[15]), cucurbit[10]uril (Q[10]), and an anthracene derivative (APy) with aggregation-induced emission (AIE) properties. The Q[n]-based linear supramol. polymer, APy@tQ[15]@Q[10], was constructed through a two-step assembly strategy. Subsequently, a highly efficient artificial light-harvesting system with relatively high antenna effect and energy transfer efficiency was successfully constructed through non-covalent interactions between Rhodamine B (RB, acceptor) and the APy@tQ[15]@Q[10] (donor). The resulting system was compatible with HeLa cells and could be used for live-cell imaging in the red channel. This supramol. assembly strategy has not only produced a highly efficient light-harvesting system but also expands the application of Q[n]s in the biomedical field. After reading the article, we found that the author used 9,10-Dibromoanthracene(cas: 523-27-3Electric Literature of C14H8Br2)

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%.Electric Literature of C14H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Cheng, Yingjie; Qu, Zhonghua; Chen, Shiru; Ji, Xiaochen; Deng, Guo-Jun; Huang, Huawen published an article in Advanced Synthesis & Catalysis. The title of the article was 《Visible-Light-Induced Photoredox 1,1-Dichloromethylation of Alkenes with Chloroform》.Reference of 3,5-Dibromoaniline The author mentioned the following in the article:

A photoredox 1,1-dichloromethylation of alkenes RC(O)C(R1)=CHR2 (R = propylamino, anilino, 2,3-dihydroindol-1-yl, etc.) with the readily available bulk chem. chloroform was described, furnishing a variety of 1,1-dichloroalkane products RC(O)C(R1)C(R2)(CHCl2) selectively. Furthermore, this transformation could proceed smoothly on gram-scale, and the obtained products could transform into diverse γ-lactam derivatives such as 3-methyl-1-phenyl-1H-pyrrol-2(5H)-one, 5-methoxy/5-hydroxy-3-methyl-1-phenylpyrrolidin-2-one with simple treatment. Mechanistically, the single electron transfer (SET) with excited photocatalyst and subsequent deprotonation of triethylamine generates the key α-aminoradical intermediate, which enables selective Cl-atom transfer of chloroform. The specific selectivity, broad substrate scope, as well as the mild reaction conditions make this strategy especially attractive. After reading the article, we found that the author used 3,5-Dibromoaniline(cas: 626-40-4Reference of 3,5-Dibromoaniline)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Amines can be classified according to the nature and number of substituents on nitrogen. Aliphatic amines contain only H and alkyl substituents. Aromatic amines have the nitrogen atom connected to an aromatic ring.Important amines include amino acids, biogenic amines, trimethylamine, and aniline. Inorganic derivatives of ammonia are also called amines, such as monochloramine (NClH2).Reference of 3,5-Dibromoaniline

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Ohshita, Joji; Ohta, Akiyoshi; Saadom, Siti Zulaikha Binti; Adachi, Yohei; Murakami, Hideki; Haino, Takeharu published an article in Polymer Journal (Tokyo, Japan). The title of the article was 《Synthesis and optical properties of disiloxane-linked decathiophene and dodecathiophene polymers》.Name: 2,5-Dibromothiophene The author mentioned the following in the article:

Disiloxane-linked decathiophene and dodecathiophene polymers were prepared and their optical properties were examined Compared with the monosilane-linked congeners reported previously, these polymers showed slightly red shifted absorption and PL bands in solution Interestingly, the PL bands were red shifted when the spectra were measured in film, and the red shifts became pronounced as the silicon linkers were elongated from monosilane to disiloxane. This is likely due to the enhanced aggregation of the oligothiophene units, reflecting the improved flexibility of the silicon linkers. After reading the article, we found that the author used 2,5-Dibromothiophene(cas: 3141-27-3Name: 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Name: 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Scheurle, Patricia I.; Maehringer, Andre; Haug, Tabea; Biewald, Alexander; Axthammer, Daniel; Hartschuh, Achim; Harms, Lena; Wittstock, Gunther; Medina, Dana D.; Bein, Thomas published an article in Crystal Growth & Design. The title of the article was 《Helical Anthracene-Ethyne-Based MOF-74 Analogue》.Safety of 9,10-Dibromoanthracene The author mentioned the following in the article:

A flexible, electron-rich building block was integrated into the backbone of a metal-organic framework with a MOF-74 topol. The building block comprises a central anthracene core connected to acetylene groups. Solvothermal synthesis with Mn2+ yields a highly crystalline anthracene-ethyne-based MOF-74 structure. It shows an unusual helical rod-like morphol., exhibiting visible light absorption and photoluminescence. In the experiment, the researchers used 9,10-Dibromoanthracene(cas: 523-27-3Safety of 9,10-Dibromoanthracene)

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%.Safety of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary