Month: October 2022

《Convergent charge interval spacing of zwitterionic 4-vinylpyridine carboxybetaine structures for superior blood-inert regulation in amphiphilic phases》 was written by Chiu, Chieh-Yang; Chang, Yung; Liu, Tzu-Hao; Chou, Ying-Nien; Yen, Ta-Jen. Quality Control of 4-Bromobutanoic acidThis research focused onzwitterionic vinylpyridine carboxybetaine blood regulation amphiphilic phase. The article conveys some information:

Antifouling materials are indispensable in the biomedical field, but their high hydrophilicity and surface free energy provoke contamination on surfaces under atm. conditions, thus limiting their applicability in medical devices. This study proposes a new zwitterionic structure, 4-vinylpyridine carboxybetaine (4VPCB), that results in lower surface free energy and increases biol. inertness. In the design of 4VPCB, one to three carbon atoms are inserted between the pos. charge and neg. charge (carbon space length, CSL) of the pyridyl-containing side chain to adjust hydration with water mols. The pyridine in the 4VPCB structure provides the hydrophobicity of the zwitterionic functional group, and thus it can have a lower free energy in the gas phase but maintain higher hydrophilicity in the liquid phase environment. Surface plasmon resonance and confocal microscopy were used to analyze the antiprotein adsorption and anti-blood cell adhesion properties of the P4VPCB brush surface. The results showed that the CSL in the P4VPCB structure affected the biol. inertness of the surface. The protein adsorption on the surface of P4VPCB2 (CSL= 2) is lower than that on the surfaces of P4VPCB1 (CSL = 1) and P4VPCB3 (CSL = 3), and the optimal resistance to protein adsorption can be reduced to 7.5 ng cm-2. The surface of P4VPCB2 can also exhibit excellent blood-inert function in the adhesion test with various human blood cells, offering a potential possibility for the future design of a new generation of blood-inert medical materials. In the experiment, the researchers used many compounds, for example, 4-Bromobutanoic acid(cas: 2623-87-2Quality Control of 4-Bromobutanoic acid)

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.).Quality Control of 4-Bromobutanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Azine-based polymers with a two-electron redox process as cathode materials for organic batteries》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020. These research results belong to Acker, Pascal; Speer, Martin E.; Woessner, Jan S.; Esser, Birgit. COA of Formula: C8H8Br2 The article mentions the following:

There is a growing interest in organic-based cathode materials for batteries due to their higher sustainability, low toxicity, and energy-efficient production and recycling. Organic p-type compounds that undergo two reversible oxidations are relatively rare, but can provide a higher specific capacity compared to mols. undergoing one-electron processes. herein azine (N-N-linked diimine)-based polymers are presented featuring two reversible oxidations at attractive potentials of 2.9 and 3.3 V vs. Li/Li+. A cross-linked and end-capped azine-based polymer provided good cycling stability in a Li-based half cell and an available specific capacity of 133 mA h g-1 paired with a high rate performance ≤ 100C rate. the study introduces azines as attractive cathode-active battery materials. In addition to this study using 1,4-Bis(bromomethyl)benzene, there are many other studies that have used 1,4-Bis(bromomethyl)benzene(cas: 623-24-5COA of Formula: C8H8Br2) was used in this study.

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. COA of Formula: C8H8Br2 Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Highly Regioselective Preparation and Characterization of New 6-O-Substituted Dieckol Derivatives》 was published in Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) in 2020. These research results belong to Kim, Yongkyun; Shin, Jooseok; Kang, Su Min; Song, Jinyoung; Shin, Hyeon-Cheol; Keum, Young-Sam; Hwang, Hye Jeong; Park, Kwangyong. Recommanded Product: Ethyl 4-bromobutyrate The article mentions the following:

Dieckol is a brown algae-derived polyphenol that has broad bioactivity and low toxicity. Therefore, it is a promising lead compound for the development of therapeutic agents to treat various pathol. conditions, including viral infections, allergies, diabetes, skin ageing, cancers, and neurodegenerative conditions. To exploit the pharmacol. potential of dieckol, its stability, solubility, pharmacokinetics, and drug delivery must be improved. This can be achieved by the controlled modification of the hydroxyl groups, but the presence of eleven nearly equivalent hydroxyl groups makes the task highly challenging. In this study, the regioselectivities in five substitution reactions of the hydroxyl groups of dieckol under various SN2 reaction conditions were investigated. After reaction optimization, five substituents (Me, benzyl, methoxymethyl, 3-hydroxypropyl, and 3-(ethoxycarbonyl)propyl) could be introduced at the 6-Oposition of dieckol with surprisingly high regioselectivity, as confirmed by 2D-NMR spectroscopic analyses. The prepared dieckol derivatives showed antioxidant and anticancer activities analogous to those of unmodified dieckol, indicating that the mono-O-substitutions did not affect the biochem. and biol. characteristics of dieckol. Therefore, the proposed methodol. for the mono-O-substitution of a specific oxygen of dieckol is a powerful tool to add various pharmaceutical attributes to dieckol, thus contributing to the development of various dieckol-based drug candidates. In addition to this study using Ethyl 4-bromobutyrate, there are many other studies that have used Ethyl 4-bromobutyrate(cas: 2969-81-5Recommanded Product: Ethyl 4-bromobutyrate) was used in this study.

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Recommanded Product: Ethyl 4-bromobutyrate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Highly conductive fluorine-based anion exchange membranes with robust alkaline durability》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020. These research results belong to Gao, Xue Lang; Sun, Li Xuan; Wu, Hong Yue; Zhu, Zhao Yu; Xiao, Nan; Chen, Jia Hui; Yang, Qian; Zhang, Qiu Gen; Zhu, Ai Mei; Liu, Qing Lin. Related Products of 629-03-8 The article mentions the following:

Anion exchange membranes (AEMs) with robust alk. stability and high ionic conductivity are imminently required for the promising electrochem. energy conversion devices – fuel cells. Herein, a series of novel crosslinked AEMs with hydrophobic fluorine-based polymer backbones bearing special functional sites and hydrophilic long flexible multi-cation side chains are prepared Morphol. observation and ion transport anal. confirm the existence of distinct microphase separation and efficient ion-conducting channels within the membranes resulting from the inherent chem. structure. A highest ionic conductivity of 136.27 mS cm-1 can be achieved by TQ-PDBA-70% (IEC = 2.16 meq. g-1) at 80°C. Meanwhile, the prepared TQ-PDBA-X AEMs exhibit a desirable swelling ratio (<10%) and excellent mech. properties (tensile stress > 22.8 MPa). It is worth noting that the retained ionic conductivity of the TQ-PDBA-70% AEM is 98.14%, 95.50%, 77.90%, 72.02% and 58.15% after being immersed in 1, 2, 4, 8 and 10 M KOH at 80°C for 1000 h, resp. Chem. structure change of the TQ-PDBA-70% AEM before and after the alk. stability test is negligible, as revealed by FT-IR. Moreover, TQ-PDBA-70% has high ionic exchange capacity (IEC) retention and maintains good mech. properties. A single cell assembled with TQ-PDBA-70% has a maximum power d. of 158.8 mW cm-2 under a c.d. of 360 mA cm-2. These results suggest that this type of structure opens a new strategy for developing high performance AEMs. The experimental part of the paper was very detailed, including the reaction process of 1,6-Dibromohexane(cas: 629-03-8Related Products of 629-03-8)

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 solvent processable and conductive polyfluorene ionomers for alkaline fuel cell applications; synthesis of cross-linkable regioregular poly(3-(5-hexenyl)thiophene) (P3HNT) for stabilizing the film morphology in polymer photovoltaic cells.Related Products of 629-03-8

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Dual mode selective detection and differentiation of TNT from other nitroaromatic compounds》 was written by Goudappagouda; Dongre, Sangram D.; Das, Tamal; Santhosh Babu, Sukumaran. Reference of 9,10-Dibromoanthracene And the article was included in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020. The article conveys some information:

Selective detection of explosives, especially TNT, is a highly desirable area of research and various explosives detection devices including fluorescent sensors are already in place. However, multi-mode sensors will be more useful and reliable than conventional fluorescent “”Turn Off”” sensors. One of the challenges is the development of selective sensors to prevent illegal transport of commonly used explosive TNT through on-the-spot anal. In this context, a fluorescent polymer-based selective detection is reported of TNT using both fluorometric and colorimetric signals. In addition, colorimetric differentiation of TNT from other nitroarom. compounds is made possible by complexing with various amines. Even though many other sensors are available for TNT, the current demonstration is unique in terms of selectivity, sensitivity, reliability, portability, and rapidity of results. The as-developed explosive detection kit can be useful in both civilian and military operations to trace the illegal transport of TNT as well as for post-explosion anal. In the part of experimental materials, we found many familiar compounds, such as 9,10-Dibromoanthracene(cas: 523-27-3Reference 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%.Reference of 9,10-Dibromoanthracene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Konovalova, Irina S.; Shishkina, Svitlana V.; Kobzev, Dmytro; Semenova, Olha; Tatarets, Anatoliy published their research in Acta Crystallographica, Section E: Crystallographic Communications in 2021. The article was titled 《Crystal structures and Hirshfeld analysis of 4,6-dibromoindolenine and its quaternized salt》.SDS of cas: 626-40-4 The article contains the following contents:

4,6-Dibromo-2,3,3-trimethyl-3H-indole, C11H11Br2N, exists as a neutral mol. in the asym. unit. The asym. unit of 4,6-dibromo-2,3,3-trimethyl-3H-indol-1-ium iodide, C12H14Br2N+·I-, contains one organic cation and one iodine anion. The pos. charge is localized on the quaternized nitrogen atom. In the crystal, mols. of 4,6-dibromoindolenine are linked by C-Br···π halogen bonds, forming zigzag chains propagating in the [001] direction. The mols. of the salt form layers parallel to the (010) plane where they are linked by C-H···Br hydrogen bonds, C-Br···Br and C-Br···I halogen bonds. The Hirshfeld surface anal. and two dimensional fingerprint plots were used to analyze the intermol. contacts present in both crystals. The results came from multiple reactions, including the reaction of 3,5-Dibromoaniline(cas: 626-40-4SDS of cas: 626-40-4)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Amines have a free lone pair with which they can coordinate to metal centers. Amine–metal bonds are weaker because amines are incapable of backbonding, but they are still important for sensing applications.While stronger than hydrogen bonds, amine–metal bonds are still weaker than both covalent and ionic bonds.SDS of cas: 626-40-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Insights into constitutional isomeric effects on donor-acceptor intermolecular arrangements in non-fullerene organic solar cells》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2019. These research results belong to Lee, Jungho; Go, Eun Min; Dharmapurikar, Satej; Xu, Jianqiu; Lee, Sang Myeon; Jeong, Mingyu; Lee, Kyu Cheol; Oh, Jiyeon; Cho, Yongjoon; Zhang, Chunfeng; Xiao, Min; Kwak, Sang Kyu; Yang, Changduk. Formula: C7H5Br2F The article mentions the following:

Donor-acceptor intermol. interactions and/or arrangements are key factors determining the performance of organic solar cells (OSCs). Herein, two ITIC-based isomeric acceptors (o-F-ITIC and m-F-ITIC) with fluorine atoms at ortho and meta positions within the side chains were developed. The developed acceptors showed different interactions and/or arrangements with the donor counterpart (PBDB-T), which caused a significant variation in the power conversion efficiency (PCE) of OSCs. The PCE of the PBDB-T:o-F-ITIC device was 11.11% vs. 8.90% of the PBDB-T:m-F-ITIC device. A detailed theor. anal. of the intermol. complexes formed between F-ITICs and PBDB-T allows a determination of how the two isomeric acceptors interact differently with PBDB-T. Relative to PBDB-T:m-F-ITIC with a preferential DCI-BDD complex, PBDB-T:o-F-ITIC showed a closer donor-acceptor interaction, with a tightly packed parallel-like DCI-BDT complex, resulting in larger interfacial areas. These behavioral characteristics explain in detail the exptl. results obtained from the comparison of the two blend systems relating to elec. and morphol. properties. Moreover, transient absorption spectroscopy of PBDB-T:o-F-ITIC revealed superior hole/electron transfer and separation processes, providing further evidence of the presence of beneficial intermol. complexes. This study facilitates the understanding of the role of constitutional isomerism both in intermol. interactions and in promoting the development of high-performance OSCs. The experimental process involved the reaction of 4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5Formula: C7H5Br2F)

4-Bromo-1-(bromomethyl)-2-fluorobenzene(cas: 76283-09-5) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. Formula: C7H5Br2F Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Organic light emitting devices based upon divalent osmium complexes: Part 1: design, synthesis, and characterization of osmium complexes》 was published in Proceedings of SPIE-The International Society for Optical Engineering in 2003. These research results belong to Carlson, Brenden; Phelan, Gregory D.; Jiang, Xuezhong; Kaminsky, Werner; Jen, Alex K. Y.; Dalton, Larry R.. Name: 4,7-Bis(4-bromophenyl)-1,10-phenanthroline The article mentions the following:

The authors present the synthesis and characterization of several novel osmium complexes [Os(N-N)2L-L]2+2X- designed for organic light emitting device (OLED) applications. In the complex notation N-N represents a derivative of 2,2′-bipyridine or 1,10-phenanthroline and L-L represents a strong π-acid arsine or phosphine ligand, 1,2-bis(diphenylarsino)ethane, 1,2-bis(diphenylarsino)ethene and 1,2-bis(diphenylphosphino)ethene. The complexes feature 3MLCT emission that ranges from 611-650 nm, which makes them suitable as an emission source for red OLEDs. Phosphorescent quantum yields ≤45% and emission lifetimes as short as 400 ns were reached. In the part of experimental materials, we found many familiar compounds, such as 4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9Name: 4,7-Bis(4-bromophenyl)-1,10-phenanthroline)

4,7-Bis(4-bromophenyl)-1,10-phenanthroline(cas: 97802-08-9) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Name: 4,7-Bis(4-bromophenyl)-1,10-phenanthroline Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary