Month: December 2022

Jing, Liling published the artcileSynthesis and carbene-insertion preparation of hydrophobic natural polymer materials for rapid and efficient oil/water separation, Category: bromides-buliding-blocks, the publication is Applied Surface Science (2022), 152394, database is CAplus.

In response to frequent oil spills and increasing discharges of oily wastewater, a variety of materials and methods have been developed to treat with oil-water mixtures In this paper, a simple and versatile method to modify a broad spectrum of natural polymer surfaces (wood aerogel, pulpboard, filter paper, cotton cloth, electrospinning gelatin film, ultrafine polypropylene fiber) was reported. This modification was based on aryl diazo compounds with hydrophobic functional groups as precursors, which were thermally activated to generate highly active carbene intermediates and induce the X-H (X = O, C,…) insertion reaction on the surface of substrates. The success of surface modification was demonstrated by the irreversible changes of the surface properties and the application on multi-behavior oil/water separation Moreover, according to the Owens-Wendt-Rabel-Kaelble method, the influence of the dispersion force and the polar force on various material surfaces was given to explore the separation mechanism. This one-step modification provides a facile and efficient strategy to achieve renewable, biodegradable, and environmentally friendly materials and surfaces with low surface energy, which offers considerable potential applications on disposal of oil pollution in the environment.

Applied Surface Science published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Liu, Delong published the artcileTunable Electron Donating and Accepting Properties Achieved by Modulating the Steric Hindrance of Side Chains in A-D-A Small-Molecule Photovoltaic Materials, Formula: C12H19BrS, the publication is Chemistry of Materials (2018), 30(3), 619-628, database is CAplus.

Modulation of the electron donating and accepting properties of organic semiconductors is an important topic in the field of organic photovoltaics. Although the small-mol. semiconductors (SMs) with an A-D-A structure can act as either electron donor or acceptor in organic photovoltaic (OPV) devices, the reason why mols. with similar conjugated structures play different roles remains unclear. In this work, we designed and synthesized two A-D-A SMs named BTCN-O and BTCN-M, which have an identical backbone and differ in the alkyl substitution position. BTCN-O and BTCN-M demonstrate similar optical absorption spectra in solution and mol. energy levels in a solid film. BTCN-O forms an ordered lamellar packed structure with compact π-π stacking, whereas BTCN-M demonstrates only a weak π-π stacking effect in solid film. We also investigated their photovoltaic properties by blending each with a polymer donor, PBDB-T, and a fullerene acceptor, PC₇₁BM, and found that the electron donating and accepting abilities of BTCN-O and BTCN-M are exactly opposite. According to the results obtained from a variety of anal. methods, we can infer that for the planar A-D-A SMs, the steric hindrance caused by the nonconjugated alkyls in their central units plays a critical role that affects their electron donating and accepting properties. More specifically, the A-D-A mols. that have low steric hindrance in their central units, which allows ordered lamellar packing and compact π-π stacking in the solid film, can act as an electron donor in OPV device, and the mols. that have high steric hindrance for intermol. π-π interactions in their central units tend to act as electron acceptors. Overall, this work provides a new perspective in the mol. design of organic photovoltaic materials.

Chemistry of Materials published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Formula: C12H19BrS.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

An, Xiang published the artcileUniversal 4-qualifiable fluorene-based building blocks for potential optoelectronic applications, Synthetic Route of 111-83-1, the publication is Chinese Chemical Letters (2022), 33(12), 5137-5141, database is CAplus.

Herein, a universal 4-qualifiable fluorene-based building block I, which is a fundamental mol. segment to functionalize and obtain novel conjugated materials, was demonstrated. Compared to the traditional modification at 9-site, addnl. 4-position functionalization provided an exciting blueprint to not only tune electronic structure and excited state via p-n mol. design engineering and space charge-transfer strategy, but also allow for optimizing intermol. arrangement and obtaining solution-processing ability. The introduction of the 4-site substituent in fluorene based semiconductors may endow materials with unique properties. Finally, two stable deep-blue light-emitting conjugated polymers, PODOPF and PODOF, by utilizing the 4-substituent fluorene based building block were successfully prepared It is believable that the performance, stability and processibility of reported outstanding fluorene-based conjugated mols. can be further optimized based on this universal building block.

Chinese Chemical Letters published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Synthetic Route of 111-83-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Di Yang published the artcileStudy on mechanism of a simple method to regulate salt tolerance of hydrophobically associating water-soluble polymers, Synthetic Route of 143-15-7, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 128266, database is CAplus.

Salt tolerance is one of the important properties of hydrophobically associating water-soluble polymers (HAWSPs). In this work, HAWSPs with different hydrophobic monomer (M12) contents (0.3 mol% and 0.5 mol%) were synthesized. The viscosity of two polymers was measured. Mol. simulation (MS) were carried out to elucidate the salt tolerance mechanism. Results show that the polymer with a higher M12 content exhibits better salt tolerance. With increasing salt content, the radius of gyration of the polymers continuously decreases when M12 content is low, while it tends to increase and then decrease under high M12 contents. Combined with the spatial conformation, it can be found that only sufficient hydrophobic monomers can enhance the association effect of the polymers, forming more hydrophobic microregions and improving the viscosity. The radial distribution function results demonstrate the little effect of salt on hydrogen bonds. This work illustrates that simply adjusting the content of hydrophobic monomers is an effective strategy to regulate the salt tolerance of the polymers, which can significantly reduce the cost of salt-tolerant polymers.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H25Br, Synthetic Route of 143-15-7.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Manabe, Takao published the artcileNew Examples of 1,6- and 1,7-Hydrogen Transfer Promoted by an α-Silyl Group in Rhodium(I)-Catalyzed Radical Reactions of Acyclic Enediynes, SDS of cas: 69361-41-7, the publication is Organometallics (1998), 17(14), 2942-2944, database is CAplus.

A Rh(I) catalyst triggers cycloaromatization of ω-trialkylsilylated acyclic enediynes to afford benzosilacycloalkane or vinylsilane products via 1,6- and/or 1,7-H transfer, presumably effected by radical stabilization by an α-silyl moiety and via a seven- and/or eight-membered rhodacycle intermediate. The addition of a catalytic amount of di-Me maleate is essential to obtain better yields of the products.

Organometallics published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, SDS of cas: 69361-41-7.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wu, Liqiang published the artcileSynthesis of 6-bromoquinolines using benzyltrimethylammonium tribromide, Category: bromides-buliding-blocks, the publication is Youji Huaxue (2010), 30(8), 1250-1254, database is CAplus.

Several 6-bromoquinoline derivatives were designed and the synthesis of the target compounds was achieved in high yield by a reaction of 2-aminobenzophenone [i.e., (2-aminophenyl)(phenyl)methanone] with α-methylene carbonyl compounds in the presence of benzyltrimethylammonium tribromide as a phase-transfer catalyst in acetonitrile at room temperature and the products thus obtained were confirmed by ¹H-NMR, ¹³C-NMR spectra and elemental anal. The title compounds thus reported included 8-bromo-10-phenyl-11H-indeno[1,2-b]quinolin-11-one, 2-bromo-12-phenylbenz[b]acridine-6,11-dione and 6-bromo-4-phenylquinoline derivatives, 7-bromo-9-phenyl-1H-cyclopenta[b]quinoline derivatives, etc.

Youji Huaxue published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C5H8N2O, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Morimoto, Tsumoru published the artcileRh(I)-Catalyzed CO Gas-Free Carbonylative Cyclization Reactions of Alkynes with 2-Bromophenylboronic Acids Using Formaldehyde, Synthetic Route of 89694-44-0, the publication is Organic Letters (2009), 11(8), 1777-1780, database is CAplus and MEDLINE.

The rhodium(I)-catalyzed reaction of alkynes with 2-bromophenylboronic acids in the presence of paraformaldehyde resulted in a CO gas-free carbonylative cyclization, yielding indenone derivatives [RhCl(BINAP)]₂ and [RhCl(cod)]₂ were responsible for the decarbonylation of formaldehyde and the subsequent carbonylation of alkynes with 2-haloboronic acids, resp., leading to efficient whole carbonylation. Sterically bulky and electron-withdrawing groups on unsym. substituted alkynes favored the α-position of indenones.

Organic Letters published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C7H8BBrO3, Synthetic Route of 89694-44-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Tsuji, Hayato published the artcileIndium-catalyzed cycloisomerization of ψ-Alkynyl-β-keto esters into six- to fifteen-membered rings, Application In Synthesis of 81216-14-0, the publication is Angewandte Chemie, International Edition (2007), 46(42), 8060-8062, database is CAplus and MEDLINE.

Many different sizes of rings are made available via heating of ψ-alkynyl-β-keto esters in the presence of In(NTf₂)₃ (Tf = trifluoromethanesulfonyl). The products, produces six- to fifteen-membered ring compounds are produced in good yields. The reaction features low catalyst loading and moderately dilute conditions, and the formation of medium-sized rings is sometimes faster than that for the corresponding six-membered rings. Cycloisomerization of 3-oxo-16-heptadecynoic acid Me ester gave 2-methyl-15-oxo-1-cyclopentadecene-1-carboxylic acid Me ester. Reduction of the latter gave 2-methyl-15-oxo-1-cyclopentadecanecarboxylic acid Me ester. Decarboxylation of this intermediate gave (±)-muscone (i.e., 3-methylcyclopentadecanone).

Angewandte Chemie, International Edition published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C18H10F3NO3S2, Application In Synthesis of 81216-14-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Delbosc, Nicolas published the artcileSynthesis, optoelectronic and photovoltaic properties of conjugated alternating copolymers incorporating 2,1,3-benzothiadiazole or fluorenone units: a comparative study, Formula: C12H19BrS, the publication is RSC Advances (2014), 4(29), 15236-15244, database is CAplus.

A series of p-type alternating copolymers based on oligothiophene and fluorene electron-donating units, and fluorenone or benzothiadiazole electron-withdrawing units was synthesized via Suzuki coupling reaction. Their optical, electrochem. and photovoltaic properties were investigated in detail allowing rational rules to be drawn on the structure-property relationships. We highlight in this work the crucial role of the side solubilizing groups attached to the polymer backbones that have a significant impact on the morphol. of the blends and the solar cell’s power conversion efficiency. Devices with an active area of 0.28 cm², based on fluorenone-copolymers and [70]PCBM blends showed V_oc up to 0.95 V and Power Conversion Efficiencies (PCE) up to 1.82% under AM1.5 simulated sunlight (100 mW cm^-2) conditions. These values are improved compared to the ones reported to date for this class of materials.

RSC Advances published new progress about 303734-52-3. 303734-52-3 belongs to bromides-buliding-blocks, auxiliary class Thiophene,Bromide, name is 2-Bromo-3-(2-ethylhexyl)thiophene, and the molecular formula is C12H19BrS, Formula: C12H19BrS.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kolycheva, M. T. published the artcileFluorine-containing amino acids. VII. Polyfluoroalkoxy and polyfluoromethylthio derivatives of phenylalanine, COA of Formula: C8H6BrF3S, the publication is Zhurnal Organicheskoi Khimii (1989), 25(6), 1306-11, database is CAplus.

Condensation of benzyl bromides p-RC₆H₄CH₂Br (R = polyfluoroalkoxy or polyfluoromethylthio) with OCHNHCH(CO₂Et)₂, followed by saponification and acidolytic decarboxylation, afforded phenylalanine derivatives p-RC₆H₄CH₂CH(NH₂)CO₂H. Benzaldehydes p-RC₆H₄CHO (R = F₂CHO, C₂F₅O) condensed with acylglycines R¹CO-Gly-OH (R¹ = Me, Ph) to give oxazolinones I, which were cleaved to the amino acids by hydrogenolysis in the presence of PdCl₂ and Et₃N or by HI-P in AcOH.

Zhurnal Organicheskoi Khimii published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, COA of Formula: C8H6BrF3S.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary