Tag: M.W=200-250

Song, Shizhu published the artcileImidazolium ionic Liquid-Regulated Sub-5-nm Pt(1 1 1) with a stable configuration anchored on hollow carbon nanoshells for efficient oxygen reduction, Name: 1-Bromododecane, the publication is Journal of Colloid and Interface Science (2022), 606(Part_1), 177-191, database is CAplus and MEDLINE.

Here, N-doped hollow carbon sphere (NHCS)-supported (1 1 1)-plane-engineered sub-5-nm Pt (Pt-NHCS) catalysts regulated precisely by imidazolium ionic liquids were synthesized successfully and used to catalyze oxygen reduction The (1 1 1)-plane engineered Pt nanocrystals with a diameter of 4.5 ± 0.5 nm were homogeneously deposited on the 3-dimensional spherical nanoshells. The resulting Pt nanocrystals anchored on the carbon skeleton exhibit a stable configuration in both alk. and acid electrolytes with the help of imidazolium cations and pyrolysis. Among all as-prepared catalysts, the optimized Pt-NHCS shows remarkable long-term durability. Specifically, Pt-NHCS maintains 95.3% of the original c.d. after 10,000 potential cycles, while Pt/C benchmarks exhibit a retention of 78.5%. Accelerated durability test results indicate that Pt-NHCS exhibits a high efficiency of 96% in comparison with initial c.d., while a value of 86% for Pt/C. D. functional theory calculations demonstrate that reactive Pt(1 1 1) planes with well-defined Schottky defects and vacancies adsorb and activate oxygen mol. rapidly while desorbing the reaction intermediates.

Journal of Colloid and Interface Science 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 C19H14O2, Name: 1-Bromododecane.

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

Zhuang, Zhuoxin published the artcileMelt and nucleation reinforcement for stereocomplex crystallites in poly(L-lactide)/lignin-grafted-poly(D-lactide) blend, Recommanded Product: 1-Bromododecane, the publication is European Polymer Journal (2022), 111072, database is CAplus.

Lignin-grafted-poly(D-lactide) (LGPD) with two different poly(D-lactide) (PDLA) block lengths (1100 and 2000 Da), denoted as LGPD_L and LGPD_H resp., were synthesized by ring opening polymerization using dodecylated lignin as initiator. They were then blended with poly(L-lactide) (PLLA) to improve its crystallization, mech. properties and UV-absorbance properties. It was found that stereocomplex (SC) crystallites could be formed in both PLLA/LGPD blends, and the crystallization rate of PLLA/LGPD_H was faster than that of PLLA/LGPD_L because of the longer PDLA block length. Both in the non-isothermal and isothermal crystallization process, the crystallization of PLLA in the PLLA/LGPD_H blend was the fastest when the ratio of LGPD_H was 3%. SC crystallites in the PLLA/LGPD_H blends also showed broader melting ranges and higher final melting temperatures comparing to the blends of PLLA and 4-armed PDLA (4a-PDLA), whose number of PDLA arms and mol. weight was similar to LGPD_H. These results proved that the lignin structure grafted by the PDLA arms could affect the state of SC crystallites and their acceleration effect on the crystallization of PLLA in the blend. The degradation behavior showed that the degradation rate of the LGPD_H-5% blend in the final stage of degradation (about 24 h) was the slowest comparing to other blends. Besides, the PLLA/LGPD blends had better tensile strength and UV-absorbance properties than neat PLLA.

European Polymer Journal 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 C3H6O2, Recommanded Product: 1-Bromododecane.

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

Cao, Xiang-Jian published the artcileControlling the Balance of Photoluminescence and Photothermal Effect in Cyanostilbene-Based Luminescent Liquid Crystals, Quality Control of 143-15-7, the publication is Chinese Journal of Chemistry (2022), 40(8), 902-910, database is CAplus.

Mol. motions of the luminescent liquid crystals (LLCs) show a significant effect on fluorescent emission and heat generation. In this article, a series of cyanostilbene-based LLCs (CSs: CS1-6, CS1-12, CS2-6 and CS2-12) are synthesized to investigate how the photoluminescence and photothermal effect balanced. Among these materials, the mesogens peripheried by single alkyl chains formed enantiotropic nematic (CS1-6) or smectic C (CS1-12) phase with different alkyl tail lengths. When the single aliphatic chain is replaced by mini-dendrons, room temperature (RT) monotropic hexagonal columnar phase (CS2-12) or mol. liquid (CS2-6) is formed. The results revealed that all these materials exhibited high efficiency emission with the highest quantum yield reaching 59.0%. The photoluminescence and photothermal effect can be effectively tuned by dispersing CSs into a com. available RT liquid crystal matrix 8CB, which output significantly improved photothermal conversion efficiency of 63.2%. Furthermore, the photothermal can rapidly trigger the Smectic A-Nematic-Isotropic sequence transitions of 8CB doped with CSs. This work paves a way of adjusting the balance of photoluminescence and photothermal properties of the LLC materials.

Chinese Journal of Chemistry 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, Quality Control of 143-15-7.

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

Yang, Tangpo published the artcileA bifunctional amino acid to study protein-protein interactions, Name: (4-Bromobut-1-yn-1-yl)trimethylsilane, the publication is RSC Advances (2020), 10(69), 42076-42083, database is CAplus and MEDLINE.

Protein-protein interactions (PPIs) play crucial roles in regulating essentially all cellular processes. Photo-crosslinking represents a powerful method to study PPIs. To fulfil the requirements for the exploration of different PPIs, there is a continuous demand on the development of novel photo-reactive amino acids with diverse structural properties and functionalities. Reported herein is the development of a bifunctional amino acid termed dzANA, which contains a diazirine, for photo-crosslinking, and a terminal alkyne group, for bioorthogonal tagging. Using known PPIs between histone posttranslational modifications (PTMs) and their binding partners as models, we demonstrate that the dzANA-harbouring peptide-based photoaffinity probes could efficiently and selectively capture the weak and transient PPIs mediated by histone modifications. Our study indicates the potential of dzANA to identify and characterize unknown PPIs.

RSC Advances 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 C11H8F2, Name: (4-Bromobut-1-yn-1-yl)trimethylsilane.

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

Lenstra, Danny C. published the artcileSustainable organophosphorus-catalysed Staudinger reduction, SDS of cas: 147181-08-6, the publication is Green Chemistry (2018), 20(19), 4418-4422, database is CAplus.

A highly efficient and sustainable catalytic Staudinger reduction for the conversion of organic azides to amines in excellent yields was developed. The reaction displayed excellent functional group tolerance to functionalities that were otherwise prone to reduction, such as sulfones, esters, amides, ketones, nitriles, alkenes and benzyl ethers. The green nature of the reaction was exemplified by the use of PMHS, CPME and a lack of column chromatog.

Green Chemistry published new progress about 147181-08-6. 147181-08-6 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Salt,Amine,Benzene, name is (4-Bromo-2-fluorophenyl)methanamine hydrochloride, and the molecular formula is C7H8BrClFN, SDS of cas: 147181-08-6.

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

Jenkins, T. E. published the artcileThe Raman spectrum of 2,3-dibromo-2,3-dimethylbutane between 15 K and room temperature, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (1980), 36A(5), 491-4, database is CAplus.

The Raman spectrum of (BrCMe₂)₂ was determined at 15-300 K. A gauche conformer is present at room temperature A phase transition was observed at 185 K. Another orientational phase transition at ∼77 K was discussed.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Recommanded Product: 2,3-Dibromo-2,3-dimethylbutane.

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

Fetin, P. A. published the artcileComb-like polyelectrolytes – new surfactants with controlled solubilization capacity, Safety of 1-Bromododecane, the publication is Journal of Molecular Liquids (2022), 119085, database is CAplus.

Cationic surface-active monomers with 11-acryloyloxyundecyl tail in quaternary ammonium group and the corresponding comb-like polyelectrolytes are investigated. The sources of quaternary ammonium were aliphatic amines (trimethylamine and triethylamine) or aromatic and aliphatic cyclic amines (N-methylpiperidine, N-methylmorpholine, pyridine, quinoline). The monomer to polymer transformation increases the solubilization capacity of surfactant in one order of magnitude. The comb-like polyelectrolytes are capable to effective solubilization of hydrophobic probe over the wide concentration range including extremely low concentrations of the polymer. There aren’t any precipitations of comb-like polyelectrolytes with temperature decrease unlike of many ionic low-mol. weight surfactants. Solubilization capacity of the hydrophobic probe by comb-like polyelectrolyte is slightly influenced by the mol. weight of the polymer and is determined by the nature of the ionic group of comb-like polyelectrolyte and counterion.

Journal of Molecular Liquids 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, Safety of 1-Bromododecane.

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

Ju, Cheng-Wei published the artcileModular Synthesis of Pentagonal and Hexagonal Ring-Fused NBN-Phenalenes Leading to an Excited-State Aromatization-Induced Structural Planarization Molecular Library, Quality Control of 89694-44-0, the publication is Journal of the American Chemical Society (2021), 143(15), 5903-5916, database is CAplus and MEDLINE.

Although polycyclic aromatic hydrocarbons (PAHs) with a nitrogen-boron-nitrogen (NBN) moiety have recently attracted tremendous interest due to their intriguing electronic and optoelectronic properties, all of the NBN-fused π-systems reported to date are called NBN-dibenzophenalenes and were synthesized by electrophilic aromatic substitution. The synthesis of NBN-phenalenes remains challenging, and transition-metal catalysis has never been utilized to construct NBN-embedded π-scaffolds. Herein, a palladium-catalyzed cyclization/bicyclization strategy was developed for the synthesis of diverse pentagonal and hexagonal ring-fused NBN-phenalenes and half-NBN-phenalenes. All of the NBN-embedded π-scaffolds presented in our paper are fluorescent in both solution and the solid state. Further investigations showed that the five-membered NBN rings exhibit the properties of traditional luminogens, while those with a six-membered NBN ring generally undergo photoinduced structural planarization (PISP) and exhibit different colors and quantum yields of fluorescence with different concentrations in solution Time-resolved spectroscopy and TD-DFT calculations revealed that excited-state aromatization is the driving force for PISP in hexagonal ring-fused NBN-π systems, leading to the formation of excimers. Notably, the scope of PISP compounds is still quite limited, and PISP has never been observed in NBN-π systems before. These hexagonal ring-fused NBN-π systems constitute a novel PISP mol. library and appear to be a new class of aggregation-induced excimer emission (AIEE) materials. Finally, the AIEE behavior of these six-membered NBN rings was applied to the detection of nitro explosives, achieving excellent sensitivity. In general, this work provides a new viewpoint for synthesizing NBN-fused π-systems and understanding the excited-state motion of luminogens.

Journal of the American Chemical Society 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, Quality Control of 89694-44-0.

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

Hou, Rui-zhen published the artcileHydrolysis of 5-(2-haloethyl)-1,3-dioxolanes, COA of Formula: C8H15BrO2, the publication is Jilin Daxue Ziran Kexue Xuebao (2000), 94-95, database is CAplus.

Three different kinds of 1,3-dioxolane compounds were hydrolyzed in an acidic condition. The results showed that tetrahydro-3-furanmethanol (I) was the main product. For example, hydrolysis of 5-(2-iodoethyl)-1,3-dioxolane with aqueous HCl gave 81% I.

Jilin Daxue Ziran Kexue Xuebao published new progress about 97845-58-4. 97845-58-4 belongs to bromides-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Bromide, name is 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane, and the molecular formula is C8H15BrO2, COA of Formula: C8H15BrO2.

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

Ding, Rui published the artcileA Highly Efficient Method for the Bromination of Alkenes, Alkynes and Ketones Using Dimethyl Sulfoxide and Oxalyl Bromide, Application In Synthesis of 594-81-0, the publication is Synthesis (2018), 50(21), 4325-4335, database is CAplus.

The pairing of DMSO and oxalyl bromide is reported as a highly efficient brominating reagent for various alkenes, alkynes and ketones. This bromination approach demonstrates remarkable advantages, such as mild conditions, low cost, short reaction times, provides excellent yields in most cases and represents a very attractive alternative for the preparation of dibromides and α-bromoketones.

Synthesis published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Application In Synthesis of 594-81-0.

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