Month: December 2022

Wu, Hanqing published the artcileNovel fluorescence liquid crystals with high circularly polarized luminescence based on cholesterol-decorated dicyanodistyrylbenzene, Formula: C12H25Br, the publication is Journal of Molecular Liquids (2022), 118663, database is CAplus.

The sym./asym. cholesterol- decorated dicyanodistyrylbenzene were prepared and the influence of sym./asym. structure on circularly polarized luminescence (CPL) properties was investigated for the first time. Both of them exhibited excellent fluorescence in solution and aggregated states. Their chiroptical properties were influenced greatly by the order degree of mol. stacking in different states. The sym. structure with two chiral units was favorable for better CPL emission than asym. structure with one chiral unit. The highest g_lum value was 1.5 x 10^-2 based on the effective chiral transfer and amplification of orderly liquid-crystalline mol. stacking of sym. cholesterol-decorated dicyanodistyrylbenzene in mesophase.

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 C19H34ClN, Formula: C12H25Br.

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

Oka, Hiroyuki published the artcileSynthesis and characterization of poly(1,3-phenylene)-based polyradicals carrying cyclic aminoxyls, SDS of cas: 111865-47-5, the publication is Journal of Materials Chemistry (2001), 11(5), 1364-1369, database is CAplus.

The synthesis and magnetic properties of poly(2,2,4,4-tetramethyl-N-yloxy-1,4-dihydro-2H-3,1-benzoxazine-6,8-diyl-1,3-phenylene) (4) are described. Polyradical 4 was prepared by the Pd-catalyzed cross-coupling reaction of 6,8-dibromo-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine and bis(trimethylene) 1,3-phenylenediboronate, followed by oxidation with m-chloroperoxybenzoic acid. The number average mol. weights of 4 determined by SEC (size exclusion chromatog.) were ∼4120 (15 repeating units), and the spin concentrations determined by EPR were up to 0.75 spin per repeating unit. The EPR spectrum of 4 in a toluene glass matrix showed the ΔM_s = 2 forbidden transition at g = 4.0. A Curie plot of the ΔM_s = 2 signal intensity vs. 1/T gave a straight line, suggesting that the polyradical is in a triplet ground state or a nearly degenerate singlet-triplet state.

Journal of Materials Chemistry 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 C10H16Br3N, SDS of cas: 111865-47-5.

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

Oka, Hiroyuki published the artcileSynthesis and characterization of poly(1,3-phenylene)-based polyradical carrying cyclic nitroxides observation of ferromagnetic interaction, HPLC of Formula: 111865-47-5, the publication is Polymer Journal (Tokyo) (1999), 31(11-1), 979-982, database is CAplus.

A poly(1,3-phenylene) containing cyclic nitroxide radicals which are planar in most cases, favoring extensive delocalization of unpaired electrons over the whole of radical mol. was prepared and the magnetic properties were studied. The radical containing polyphenylene was prepared by Pd-catalyzed cross-coupling of 6,8-Dibromo-2,2,4,4-tetramethyl-1H,2H,4H-3,1-benzoxazine and 2,2′-(1,3-phenylene)bis-1,3,2-Dioxaborinane, in the presence of Bu₄NCl and K₂CO₃ under N; the intermediate was oxidized by 3-chloroperoxybenzoic acid to generate the polyradical. The spin concentration of the polyradical determined by ESR was 1.61 x 1021 spins/g, corresponding to 0.75 spin per repeating unit. Spin concentration was constant in the solid state for a long time at room temperature A clear absorption peak due to the AM^s = 2 forbidden transition was observed at 5.5-60 K. The signal intensity vs. T-1 plots gives a linear relationship, indicating that the polyradical is in part at least in a triplet ground state (or both the triplet and singlet are nearly degenerated). The intramol. magnetic interaction through the n-conjugation is thus ferromagnetic.

Polymer Journal (Tokyo) 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 C10H16Br3N, HPLC of Formula: 111865-47-5.

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

Nakamura, Karin published the artcileFacile preparation of poly(3-substituted thiophene) block copolymers by nickel-catalyzed deprotonative polycondensation without external generation of thiophene organometallic species, HPLC of Formula: 303734-52-3, the publication is Chemistry Letters (2013), 42(10), 1200-1202, database is CAplus.

Thiophene-based block copolymers are synthesized by addition of bromothiophene and the Knochel-Hauser base (TMPMgCl.LiCl). Ni-catalyzed deprotonative C-H coupling polycondensation of 3-substituted-thiophenes gives head-to-tail-type poly(3-substituted thiophen-2,5-diyl) bearing Ni at the polymer end. Block copolymers of thiophene derivatives are obtained by successive addition of 2-bromo-3-alkylthiophene and Mg amide to a living polythiophene end. The use of Ni catalyst bearing an o-tolyl group gives the tolyl-group-terminated thiophene diblock copolymers in high efficiency. Triblock copolymer is also synthesized by the iterative addition of bromothiophene and TMPMgCl.LiCl.

Chemistry Letters 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, HPLC of Formula: 303734-52-3.

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

Fuji, Kanta published the artcileMurahashi Coupling Polymerization: Nickel(II)-N-Heterocyclic Carbene Complex-Catalyzed Polycondensation of Organolithium Species of (Hetero)arenes, Related Products of bromides-buliding-blocks, the publication is Journal of the American Chemical Society (2013), 135(33), 12208-12211, database is CAplus and MEDLINE.

Revisiting Murahashi coupling, we found that it effectively allows polymerization of lithiated (hetero)arenes by nickel(II)-catalyzed polycondensation. Deprotonative polymerization of 2-chloro-3-substituted thiophene with n-butyllithium gave head-to-tail-type poly(3-substituted thiophene). Poly(1,4-arylene)s were obtained by the reaction of the corresponding dibromides through lithium-bromine exchange. A lithiated thiophene derivative obtained via deprotonative halogen dance also underwent polymerization to afford a bromo-substituted polythiophene.

Journal of the American Chemical Society 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, Related Products of bromides-buliding-blocks.

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

Kabir, Shahriar published the artcileNear-infrared organic photodetectors with a soluble Alkoxy-Phthalocyanine derivative, Formula: C8H17Br, the publication is Optical Materials (Amsterdam, Netherlands) (2022), 112209, database is CAplus.

The condition of the bulk-heterojunction (BHJ) is an important factor for photodetectors as it significantly influences the efficiency of exciton dissociation from bound exciton pairs inside the active layer. In this study, we realized near-IR (NIR) photodetectors with the BHJ system of a soluble donor organic semiconductor, 1,4,8,11,15,18,22,25-octaoctyloxy-phthalocyanine, and phenyl-C61-butyric acid Me ester. By experimenting with the blend ratio of the organic materials, we observed substantial change of device performance owing to the change in the crystalline condition and morphol. of the active layer. Our organic photodiodes with optimized BHJ active layer reached shot noise limited specific detectivity of 2.1 x 10¹² Jones and external quantum efficiency of 18% with a bias of -0.5 V at the NIR wavelength of 770 nm. We attributed this improvement to the decrease in grain size inside the BHJ which resulted in an increased exciton dissociation efficiency at the donor-acceptor interface.

Optical Materials (Amsterdam, Netherlands) 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, Formula: C8H17Br.

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

Ukai, Shusaku published the artcileA Supramolecular Polymer Constituted of Antiaromatic Ni^II Norcorroles, Application In Synthesis of 143-15-7, the publication is Angewandte Chemie, International Edition (2022), 61(6), e202114230, database is CAplus and MEDLINE.

For the creation of next-generation organic electronic materials, the integration of π-systems has recently become a central theme. Such functional materials can be assembled by supramol. polymerization when aromatic π-systems are used as monomers, and the properties of the resulting supramol. polymer strongly depend on the electronic structure of the monomers. Here, the authors demonstrate the construction of a supramol. polymer consisting of an antiarom. π-system as the monomer. An amide-functionalized Ni^II norcorrole derivative formed a one-dimensional supramol. polymer through π-π stacking and hydrogen-bonding interactions, ensuring the persistency of the conducting pathway against thermal perturbation, which results in higher charge mobility along the tightly bound linear aggregates than that of the aromatic analog composed of Zn^II porphyrins.

Angewandte Chemie, International Edition 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 C18H28B2O4, Application In Synthesis of 143-15-7.

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

Ishiyama, Tatsuo published the artcileMild Iridium-Catalyzed Borylation of Arenes. High Turnover Numbers, Room Temperature Reactions, and Isolation of a Potential Intermediate, Safety of 2-(3-Bromo-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, the publication is Journal of the American Chemical Society (2002), 124(3), 390-391, database is CAplus and MEDLINE.

The borylation of arenes leads to the formation of synthetically versatile products from unactivated arene reagents. It is reported that Ir(I) precursors in conjunction with bipyridine ligands catalyze in high yields the borylation of arenes under mild conditions. These reactions encompass arenes bearing both electron-withdrawing and electron-donating substituents. The temperatures required for the transformation are much lower than those previously reported for direct arene borylation. The combination of [Ir(COE)₂Cl]₂ and (4,4-di-t-butyl)bipyridine even allows for reaction at room temperature The same catalyst system at 100° provides remarkably high turnover numbers for a hydrocarbon functionalization process. Mechanistic studies show that the reactions involve uncommon, Ir(II) tris-boryl complexes. An example of this type of complex ligated by di-t-butylbipyridine, [Ir(COE)(Bpin)₃(4,4′-di-t-Bu-BPY)], was isolated and structurally characterized. It reacted rapidly at room temperature to produce aryl boronate esters in high yields.

Journal of the American Chemical Society published new progress about 401797-04-4. 401797-04-4 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronate Esters,Boronic acid and ester, name is 2-(3-Bromo-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C13H18BBrO3, Safety of 2-(3-Bromo-5-methoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane.

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

Zhang, Yue published the artcileSynthesis of All-Conjugated Diblock Copolymers by Quasi-Living Polymerization and Observation of Their Microphase Separation, Application In Synthesis of 303734-52-3, the publication is Journal of the American Chemical Society (2008), 130(25), 7812-7813, database is CAplus and MEDLINE.

We designed and synthesized the all-conjugated diblock copolymers poly(3-hexylthiophene-block-3-(2-ethylhexyl)thiophene)s (P(3HT-b-3EHT)s) via a modified Grignard metathesis (GRIM), a type of quasi-living polymerization, and studied their microphase-separated structures. The P(3HT-b-3EHT)s synthesized had well-controlled mol. weights and very narrow polydispersity indexes (PDIs), which demonstrates the usefulness of GRIM polymerization for the synthesis of semiconducting block copolymers. P(3HT-b-3EHT)s self-organized to form clear microphase-separated patterns upon thermal treatment, as observed by AFM. Interestingly, the enhancement of the interchain interaction of the P3HT segments compared with the P3HT homopolymer was clearly observed from the UV-vis spectra, despite the fact that the amount of crystalline P3HT fraction was reduced to 83% of the total polymer amount in P(3HT-b-3EHT). It is suggested that the relatively unconstrained, amorphous segments of P3EHT can enhance the crystallization of P3HT segments to form an ordered self-organized nanostructure.

Journal of the American Chemical Society 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 C42H63O3P, Application In Synthesis of 303734-52-3.

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

Dastan, Arif published the artcileBromination of naphthalene and derivatives: high temperature bromination. XI, Recommanded Product: 1,3-Dibromonaphthalene, the publication is Tetrahedron (1999), 55(44), 12853-12864, database is CAplus.

Thermal bromination and photobromination of naphthalenes have been studied. Several hexabromo- and tetrabromotetralin derivatives have been obtained as the major products, besides bromonaphthalene derivatives Base-promoted elimination reactions provided di-, tri-, and tetrabromonaphthalenes. A convenient method was developed for the synthesis of 1,3-dibromonaphthalene starting from I. The structures of these products were determined by ¹H- and ¹³C-NMR data and x-ray structural anal.

Tetrahedron published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Recommanded Product: 1,3-Dibromonaphthalene.

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