Month: December 2022

Lo, Ping Hsun published the artcileThe effect of C_X (alkyl groups) on the migration insertion polymerization (MIP) of ^PFpC_X [^PFp = (PPh₂(CH₂)₃Cp)Fe(CO)₂], Recommanded Product: 1-Bromododecane, the publication is Polymer (2022), 124574, database is CAplus.

Migration insertion polymerization (MIP) of organometallic monomers, ^PFpC_X [^PFp = (PPh₂(CH₂)₃Cp)Fe(CO)₂, C_X = (CH₂)_X-1CH₃, X = 12 or 18] was performed under various conditions. The oligomerization occurred in accompany with the monomer cyclization generating ^PFpC_X small rings at the early stage, which was followed by a complete cyclization of the oligomers generating P(^PFpC_X)_n macrocycles. ^PFpC_X small rings could be completely removed via precipitating the crude products in a poor solvent for the macrocycles. The solution and bulk MIP of ^PFpC_X (X = 12 or 18) had a similar cyclization rate but both were significantly accelerated at a higher MIP temperature (100°C). It is explained by the temperature-dependent tendency for the cyclization. The dependence of d.p. (DP) on the MIP conditions was discussed and the self-assembly of resultant P(^PFpC₁₂)_n was examined

Polymer 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, Recommanded Product: 1-Bromododecane.

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

Sun, Xiaoyang published the artcileHalogen-bond-promoted radical isocyanide insertion of o-diisocyanoarenes with perfluoroalkyl bromides under visible light irradiation, HPLC of Formula: 401-55-8, the publication is Huaxue Xuebao (2017), 75(1), 115-118, database is CAplus.

A halogen-bond-promoted double radical isocyanide insertion of o-diisocyanoarenes with perfluoroalkyl bromides was reported, in which perfluoroalkyl bromides as halogen bond donors and organic bases as halogen bond acceptors. Fluoroalkyl radicals could be generated by a visible-light-induced single electron transfer (SET) process. Fluoroalkyl radicals were trapped by o-diisocyanoarenes to give 2-fluoroalkylated quinoxaline derivatives These reactions could be carried out under mild conditions with good chem. yields and broad substrate scope. A broad range of fluoroalkyl bromides with different functionalities could undergo this reaction to give the corresponding quinoxaline derivatives in good yields. A variety of o-diisocyanides could be fluoroalkylated to give quinoxalines under our established conditions. The radical nature of this reaction was confirmed by ESR (EPR) experiments using tert-butyl-α-phenylnitrone (PBN) as a spin trap. When PBN was introduced into the reaction mixture, a spectrum signal attributed to the spin adduct C₈F₁₇-PBN appeared as a triplet of doublets. Without light and amine, almost no signal was observed These phenomena strongly suggested that the perfluoroalkyl radical was the key intermediate and the generation of the intermediate heavily relied on the presence of light and amine. A series of deuteration experiments were performed and these results suggested that both the amine and solvent could serve as the hydrogen source and solvent was the major source.

Huaxue Xuebao published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C20H12N2O2, HPLC of Formula: 401-55-8.

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

Lu, Mengxia published the artcileSynthesis of D-A low-bandgap polymer-based thieno[3,4-b]pyrazine and benzo[1,2-b:4,5-b’]dithiophene for polymer solar cells, Related Products of bromides-buliding-blocks, the publication is Polymer Bulletin (Heidelberg, Germany) (2017), 74(2), 603-614, database is CAplus.

Three D-A low-bandgap polymer-based benzo[1,2-b:4,5-b’]dithiophene (BDT) and thieno[3,4-b]pyrazine (TP) unit with different substituents were synthesized using Stille coupling. The substituent effects were explored. It is found that attaching the Ph group at the 2,3-positions of thienopyrazine unit is beneficial to good coplanarity and regularity of mol. packing. Meanwhile, attaching the longer alkoxyl side chain at BDT unit or Ph group at the 2,3-positions of thienopyrazine unit had the relatively deep HOMO (LUMO) energy levels. The three D-A polymers showed good thermal stability and exhibited broad absorption, low bandgap, and order packing structure. As a result, the highest PCE of 1.50 % was achieved for the polymer P2 with the substituents, including hexyldecyloxyl at the BDT unit and Ph at the TP unit.

Polymer Bulletin (Heidelberg, Germany) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Related Products of bromides-buliding-blocks.

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

Li, Gongchun published the artcileSynthesis and properties of a novel decacyclic S,N-heteroacene, Related Products of bromides-buliding-blocks, the publication is Acta Crystallographica, Section C: Structural Chemistry (2022), 78(4), 250-256, database is CAplus and MEDLINE.

In this work, the Cadogan ring-closure reaction between the benzene moiety of thieno[3,2-b]indole and 5,6-dinitrobenzo[c][1,2,5]thiadiazole was employed to prepare the novel decacyclic S,N-heteroacene 15,16-dibutyl-14,17-didodecyldithieno[2”,3”:2′,3′]indolo[6′,7′:4,5]pyrrolo[3,2-e:2′,3′-g][2,1,3]benzothiadiazole I, C₅₈H₇₆N₆S₃. The conjugated backbone of compound I was extended in comparison with its octacyclic analog as the central unit within Y6-type mol. acceptors, a family of overwhelming electron acceptors in polymer solar-cell research. The single-crystal X-ray diffraction (SC-XRD) characterization indicated the existence of π-π and C(sp²)-H···π interactions among TIP mols. The electrochem. and optical properties of compound I were also characterized. As a novel S,N-heteroacene building block, compound I was anticipated to be of potential use in the construction of promising electronic materials.

Acta Crystallographica, Section C: Structural 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, Related Products of bromides-buliding-blocks.

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

Gao, Shouhai published the artcileBuilding fluorescent sensors for carbohydrates using template-directed polymerizations, Computed Properties of 166821-88-1, the publication is Bioorganic Chemistry (2001), 29(5), 308-320, database is CAplus and MEDLINE.

The ability to custom-make fluorescent sensors for different analytes could have a tremendous impact in a variety of areas. Template-directed polymerization or mol. imprinting seems to be a promising approach for the preparation of high-affinity and specific binding sites for different template mols. However, the application of mol. imprinting in the preparation of fluorescent sensors has been hampered by the lack of suitable fluorescent tags, which would respond to the binding event with significant fluorescence intensity changes. We have designed and synthesized a fluorescent monomer (1) that allows for the preparation of fluorescent sensors of cis diols using mol. imprinting methods. This monomer has been used for the preparation of imprinted polymers as sensitive fluorescent sensors for d-fructose. The imprinted polymers prepared showed significant fluorescence intensity enhancement upon binding with the template carbohydrate. (c) 2001 Academic Press.

Bioorganic Chemistry published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, Computed Properties of 166821-88-1.

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

Han, Lin published the artcileMulti-hydroxyl containing organo-vermiculites for enhanced adsorption of coexisting methyl blue and Pb(II) and their adsorption mechanisms, Related Products of bromides-buliding-blocks, the publication is Colloids and Surfaces, A: Physicochemical and Engineering Aspects (2022), 129542, database is CAplus.

To address the competitive adsorption of complex wastewater components on organo-vermiculites (organo-Vts), multi-hydroxy containing gemini surfactants varying in alkyl chain length (G₁₂, G₁₄ and G₁₆) are designed and applied for modifying Na-vermiculite (Na-Vt) targeted to the removal of co-existing MB and Pb(II). Organo-Vts exhibit enhanced hydrophobicity and enlarged interlayer spacing compared with Na-Vt, with the saturated modifier dosage reaching as low as 0.4 CEC of Na-Vt. Shorter alkyl chain induces suitable packing d. and interlayer environment, endowing G₁₂-Vt the highest adsorption capacity towards MB/Pb(II) compared with G₁₄-Vt and G₁₆-Vt (178.3/63.0 mg/g compared with 143.7/38.1 and 88.6/36.6 mg/g, resp.). Freundlich isotherm and PSO kinetic model are agreeable (the values of R² are higher than 0.98) with the endothermic adsorption processes. Notably, a simultaneous effect in binary-component system is obtained, and the maximum adsorption capacities of G₁₂-Vt towards MB/Pb(II) reaching 349.9 and 124.5 mg/g, which are 1.96 and 1.95 times higher than single-component system, resp. Combination of theor. fitting and mol. simulation co-reveals the adsorption mechanism: the simultaneous effect is due to the providing of addnl. active sites by the adsorbed MB, which is stronger than that between Pb(II) and the modifier. Existence of π-ion interaction enhances the retention of Pb(II) for a further step. This work broadens a new research perspective for complex wastewater treatment and provides a deep understanding of the stimulative adsorption mechanism between dyes and metal ions.

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, Related Products of bromides-buliding-blocks.

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

Fan, Guanglin published the artcileRubber-like composites with tunable thermal- and photo-responsive shape memory properties, Safety of 1-Bromododecane, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2022), 137534, database is CAplus.

Shape memory polymers (SMPs) are crosslinked networks with mol. switches to control network mobility and thus macroscopic deformation. The network crosslinking and the mol. switches make most SMPs behave like hard plastics, with very few exceptions whose extensibilities are comparable to rubbers and elastomers. Here we report a class of composites that comprise polystyrene-b-ethylene-co-butylene-b-styrene (SEBS) as elastic matrixes and azobenzene derivatives (ADs) as mol. switches. The incorporation of the ADs does not impair the extensibility of the SEBS substrates, and the tensile strains of the prepared composites can exceed 900% even when the content of the ADs reaches 30 wt%. The thermal- and photo-responsive solid-liquid transitions of the ADs are responsible for the shape memory effects of the composites. The photo-responsive shape recovery process can be completed within 2 s, and 2D-to-3D shape transformations are realized on the samples fixed with tensile strains by spatiotemporal control of UV irradiation On another aspect, the chem. structures of the ADs can be tailored to regulate their m.ps. and thus the thermal responsive shape memory properties of the composites. Furthermore, different pieces of composites can be combined by hot-pressing to exhibit spatially tailorable thermal responsive shape recovery behaviors. The facile preparation and interesting shape memory properties of the rubber-like composites can inspire the design of soft SMPs with more promising applications.

Chemical Engineering Journal (Amsterdam, Netherlands) 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

Luo, Min published the artcileSynthesis and Optical Properties of Soluble Near-Infrared Arylene Bisthienoimidazole Dyes, COA of Formula: C4Br2N2O4S, the publication is Organic Letters (2011), 13(15), 4092-4095, database is CAplus and MEDLINE.

Soluble, film-forming near-IR arylene bisthienoimidazole dyes with a band gap of 1.2-1.3 eV are electrochromic and absorb strongly at the telecommunication wavelengths (1310 and 1550 nm) in the oxidized state.

Organic Letters published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, COA of Formula: C4Br2N2O4S.

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

Yang, Peng published the artcileEnantioselective Dearomative [3 + 2] Umpolung Annulation of N-Heteroarenes with Alkynes, Category: bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2022), 144(3), 1087-1093, database is CAplus and MEDLINE.

Enantioselective [3 + 2] annulation of N-heteroarenes such as 2-(2-bromophenyl)quinoline with alkynes R¹CCR² [R¹ = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.; R² = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.] has been developed via a cobalt-catalyzed dearomative umpolung strategy in the presence of chiral ligand e.g., [(2R,3R)-3-(diphenylphosphanyl)butan-2-yl]diphenylphosphane and reducing reagent. A variety of electron-deficient N-heteroarenes e.g., 2-(2-bromophenyl)quinoline and internal or terminal alkynes are employed in this reaction, showing a broad substrate scope and good functionality tolerance. Annulation of electron-rich indoles I (R = H, 5-Cl) with alkynes is also developed. This protocol provides a straightforward access to a variety of N-spiroheterocyclic mols. such as II and in excellent enantioselectivities (76 examples, up to 99% ee).

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 C3H12Cl2N2, Category: bromides-buliding-blocks.

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

Yang, Peng published the artcileEnantioselective Dearomative [3 + 2] Umpolung Annulation of N-Heteroarenes with Alkynes, HPLC of Formula: 1450711-53-1, the publication is Journal of the American Chemical Society (2022), 144(3), 1087-1093, database is CAplus and MEDLINE.

Enantioselective [3 + 2] annulation of N-heteroarenes such as 2-(2-bromophenyl)quinoline with alkynes R¹CCR² [R¹ = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.; R² = Me, Ph, benzyloxymethyl, (thiophen-2-ylmethoxy)methyl, etc.] has been developed via a cobalt-catalyzed dearomative umpolung strategy in the presence of chiral ligand e.g., [(2R,3R)-3-(diphenylphosphanyl)butan-2-yl]diphenylphosphane and reducing reagent. A variety of electron-deficient N-heteroarenes e.g., 2-(2-bromophenyl)quinoline and internal or terminal alkynes are employed in this reaction, showing a broad substrate scope and good functionality tolerance. Annulation of electron-rich indoles I (R = H, 5-Cl) with alkynes is also developed. This protocol provides a straightforward access to a variety of N-spiroheterocyclic mols. such as II and in excellent enantioselectivities (76 examples, up to 99% ee).

Journal of the American Chemical Society published new progress about 1450711-53-1. 1450711-53-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Boronic Acids,Boronic Acids,Boronic acid and ester, name is (2-Bromo-5-methylphenyl)boronic acid, and the molecular formula is C8H15ClN2, HPLC of Formula: 1450711-53-1.

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