Tag: M.W=300-350

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

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

Huang, Weichen published the artcileCobalt-Catalyzed Asymmetric Cross-Coupling Reaction of Fluorinated Secondary Benzyl Bromides with Lithium Aryl Boronates/ZnBr₂, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Organic Letters (2020), 22(11), 4327-4332, database is CAplus and MEDLINE.

A cobalt-catalyzed asym. cross-coupling of α-bromo-α-fluorotoluene derivatives with a variety of aryl zincates derived from lithium aryl Bu pinacol boronates and ZnBr₂ under mild reaction conditions was described. In addition to mild reaction conditions, another advantage includes the compatibility of various common functional groups such as fluoride, chloride, bromide, cyano, or ester groups. Furthermore, this protocol was successfully applied to the enantioselective synthesis of three fluorinated derivatives of biol. active compounds or drug mols.

Organic Letters published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

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

Xu, Xiaofeng published the artcilePyrrolo[3,4-g]quinoxaline-6,8-dione-based conjugated copolymers for bulk heterojunction solar cells with high photovoltages, Formula: C4Br2N2O4S, the publication is Polymer Chemistry (2015), 6(25), 4624-4633, database is CAplus.

A new electron-deficient building block 5,9-di(thiophen-2-yl)-6H-pyrrolo[3,4-g]quinoxaline-6,8(7H)-dione (PQD) was synthesized via functionalizing the 6- and 7-positions of quinoxaline (Qx) with a dicarboxylic imide moiety. Side chain substitution on the PQD unit leads to good solubility which enables very high mol. weight copolymers to be attained. The fusion of two strong electron-withdrawing groups (Qx and dicarboxylic imide) makes the PQD unit a stronger electron-deficient moiety than if the unit had just one electron-withdrawing group, thus enhancing the intramol. charge transfer between electron-rich and deficient units of the copolymer. Four PQD-based polymers were synthesized which feature deep-lying HOMO (HOMO) levels and bathochromic absorption spectra when compared to PBDT-Qx and PBDT-TPD analogs. The copolymers incorporated with benzo[1,2-b:4,5-b’]dithiophene (BDT) units show that the 1D and 2D structural variations of the side groups on the BDT unit are correlated with the device performance. As a result, the corresponding solar cells (ITO/PEDOT:PSS/polymer:PC₇₁BM/LiF/Al) based on the four copolymers feature very high open-circuit voltages (V_oc) of around 1.0 V. The copolymer PBDT-PQD1 attains the best power conversion efficiency of 4.9%, owing to its relatively high absorption intensity and suitable film morphol. The structure-property correlation demonstrates that the new PQD unit is a promising electron-deficient building block for efficient photovoltaic materials with high V_oc.

Polymer Chemistry 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 C19H21N3O3S, Formula: C4Br2N2O4S.

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

Ding, Siyi published the artcileNNB-type tridentate boryl ligands enabling a highly active iridium catalyst for C-H borylation, Application In Synthesis of 401797-04-4, the publication is Molecules (2019), 24(7), 1434, database is CAplus and MEDLINE.

Boryl ligands play a very important role in catalysis because of their very high electron-donating property. NNB-type boryl anions were designed as tridentate ligands to promote aryl C-H borylation. In combination with [IrCl(COD)]₂, they generate a highly active catalyst for a broad range of (hetero)arene substrates, including highly electron-rich and/or sterically hindered ones. This work provides a new NNB-type tridentate boryl ligand to support homogeneous organometallic catalysis.

Molecules 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, Application In Synthesis of 401797-04-4.

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

Tarkuc, Simge published the artcileThe effect of changes in π-conjugated terthienyl systems using thienyl and ethylenedioxybenzene functionalized thieno[3,4-b]pyrazine precursors: Multicolored low band gap polymers, HPLC of Formula: 52431-30-8, the publication is Electrochimica Acta (2010), 55(24), 7254-7258, database is CAplus.

New classes of thieno[3,4-b]pyrazines containing thienyl and ethylenedioxy Ph units on electron-withdrawing moieties of π-conjugated terthienyl were synthesized. The effect of structural differences on electrochem. and optoelectronic properties of the resulting polymers was studied. Changes in the electronic nature of the functional groups enable to tune the electrochem. properties of the π-conjugated terthienyl monomers by lowering oxidation potential from 0.62 V (DTTP) to 0.56 V (DBTP). Spectroelectrochem. analyses revealed that the neutral polymer (PDBTP) is dark green in its neutral state revealing π-π^* transitions in two well-separated bands at 410 and 751 nm. The electronic band gap of polymer, defined as the onset of the π-π^* transition, is 1.0 eV. Using the thienyl unit instead of ethylenedioxy Ph, a red shift in the band gap (0.95 eV) is observed The polymer, PDTTP, exhibits multicolor electrochromism and can be switched between a dark yellow neutral state, a green intermediate state, and a brown oxidized state. PDBTP also shows a multicolored electrochromic behavior with three distinct states: dark green at the neutral state, a brown intermediate state, and a brown-violet oxidized state.

Electrochimica Acta 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 C17H14N2O2, HPLC of Formula: 52431-30-8.

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

Batiste, Laurent published the artcileChemical Space Expansion of Bromodomain Ligands Guided by in Silico Virtual Couplings (AutoCouple), SDS of cas: 850429-74-2, the publication is ACS Central Science (2018), 4(2), 180-188, database is CAplus and MEDLINE.

Expanding the chem. space and simultaneously ensuring synthetic accessibility is of upmost importance, not only for the discovery of effective binders for novel protein classes, but more importantly, for the development of compounds against hard-to-drug proteins. Here, the authors present AutoCouple, a de novo approach to computational ligand design focused on the diversity-oriented generation of chem. entities via virtual couplings. In a benchmark application, chem. diverse compounds with low-nanomolar potency for the CBP bromodomain and unprecedented selectivity (up to 1500 fold) against the BRD4(1) bromodomain were achieved by the synthesis of ∼50 derivatives of the original fragment. The binding mode was confirmed by x-ray crystallog., target engagement in cells was demonstrated and anti-proliferative activity showcased in three cancer cell lines. These results reveal AutoCouple as a useful in silico coupling method to expand the chem. space in hit optimization campaigns resulting in potent, selective and cell permeable bromodomain ligands.

ACS Central Science published new progress about 850429-74-2. 850429-74-2 belongs to bromides-buliding-blocks, auxiliary class Morpholine,Bromide,Sulfamide,Benzene, name is 4-((3-Bromo-4-methylphenyl)sulfonyl)morpholine, and the molecular formula is C11H14BrNO3S, SDS of cas: 850429-74-2.

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

Cimrova, Vera published the artcileDonor-acceptor copolymers containing bithiophene and dithiophenylthienothiadiazole units with fast electrochromic response, Quality Control of 52431-30-8, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2019), 7(28), 8575-8584, database is CAplus.

New low-bandgap donor-acceptor (D-A) functional copolymers, CDTDBT and CEHTDBT, composed of a 3,3′-didodecyl-2,2′-bithiophene donor and 4,6-bis(3′-dodecylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (DT) or 4,6-bis(3′-(2-ethylhexyl)thiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (EHT) acceptor structural units, resp., were synthesized by Stille coupling of the corresponding comonomers. The influence of decyls or branched 2-ethylhexyls chains attached to the thiophenes of the 4,6-bis(3′-alkylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole on the photophys., thermochromic, electrochem., and spectroelectrochem. properties are reported and discussed in comparison to a series of D-A copolymers with various donor units and the corresponding dithiophenylthienothiadiazole (DT or EHT) acceptor units. The new copolymers, CDTDBT and CEHTDBT, exhibit interesting electrochromic behaviors with fast response times, which reach full optical contrast in 0.3 s. These new copolymers have the potential to be used for optical switching.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices 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, Quality Control of 52431-30-8.

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

Kminek, Ivan published the artcileLow-band gap copolymers containing thienothiadiazole units: synthesis, optical, and electrochemical properties, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2010), 48(13), 2743-2756, database is CAplus.

Novel low-band gap alternating copolymers consisting of 9,9-bis(2-ethylhexyl)fluorene and 4,6-di(2-thienyl)thieno[3,4-c][1,2,5]thiadiazole and its 3,3”-dialkyl derivatives were synthesized by Suzuki copolymerization reaction, and their photophys. and electrochem. properties were studied. The copolymers possess small optical band gap 1.3-1.4 eV. The absorption covers the whole visible spectral region. The long-wavelength absorption maxima in thin films located at approx. 750-785 nm are significantly red shifted compared with those in solution, indicating strong intermol. interactions. The introduction of alkyl chains to the thiophene units increases the mol. weights of soluble fractions and solubility of the final copolymers, leading to the improved processability of thin films. Polymer solutions exhibited solvatochromism and thermochromism, which is strongly supported by the involvement of the alkyl chains. The copolymers exhibited ambipolar redox properties and reversible electrochromic behavior. The electronic properties are influenced only slightly by alkyl substituents.

Journal of Polymer Science, Part A: Polymer Chemistry 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, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Mikroyannidis, J. A. published the artcileEfficient bulk heterojunction solar cells using an alternating phenylenevinylene copolymer with dithenyl(thienothiadiazole) segments as donor and PCBM or modified PCBM as acceptor, Formula: C4Br2N2O4S, the publication is Solar Energy Materials & Solar Cells (2011), 95(11), 3025-3035, database is CAplus.

A novel low band gap alternating phenylenevinylene copolymer, P, with dithenyl (thienothiadiazole) segments was synthesized by Heck coupling. It was soluble in common organic solvents, showed broad absorption curve with long-wavelength absorption maximum at 580-598 nm and optical band gap of 1.74 eV, which is comparable with the electrochem. band gap of about 1.80 eV. P (electron donor) was blended with PCBM or modified PCBM i.e. F (electron acceptor) to fabricate bulk heterojunction (BHJ) solar cells. The power conversion efficiency (PCE) of the devices based on P:PCBM and P:F cast from 1.2-dichlorobenzene (DCB) was found to be 1.40% and 2.32%, resp. The higher value of PCE for the device with P:F as compared to P:PCBM is attributed to the increase in both short circuit current (J _sc) and open circuit voltage (V_oc). The increase in the J _sc is due to the stronger light absorption of F in visible region as compared to PCBM, i.e. more exciton generation in the blend. On the other hand, the higher difference between the LUMO levels of P and F, as compared to P and PCBM is responsible for the enhancement in the V_oc. A maximum overall PCE of 4.20% was obtained for the BHJ polymer cell based on the active layer (P:F) deposited from mixed solvents 1-chloronaphthalene/1,2-dichlorobenzene (CN/DCB) and subsequent thermal annealing at 120 °C. This improvement in the PCE has been attributed to the enhanced crystallinity of the blend and more balanced charge transport in the device due to the thermal treatment.

Solar Energy Materials & Solar Cells 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, Formula: C4Br2N2O4S.

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