Category: 52431-30-8

Pruschinski, Lucas published the artcileSuzuki-Miyaura Cross-Couplings under Acidic Conditions, Application of 2,5-Dibromo-3,4-dinitrothiophene, the publication is Synthesis (2020), 52(6), 882-892, database is CAplus.

Suzuki-Miyaura reactions with Pd(PPh₃)₄ had carried out using lithium N-phenylsydnone-4-carboxylate as additive, which gave best yields at pH 5.7 in a mixture of acetic acid, water, and sodium carbonate. Reaction parameters such as the Pd source, the solvent, reaction time and temperature, acid, base and carboxylate have been varied and some representative examples of the Suzuki-Miyaura reaction have been examined

Synthesis 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, Application of 2,5-Dibromo-3,4-dinitrothiophene.

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

Freese, Tyll published the artcileAnionic N-heterocyclic carbenes derived from sydnone imines such as molsidomine. Trapping reactions with selenium, palladium, and gold, SDS of cas: 52431-30-8, the publication is Tetrahedron (2017), 73(36), 5350-5357, database is CAplus.

The sydnone imines Molsidomine and 5-(benzoylimino)-3-(2-methoxyphenyl)-1,2,3-oxadiazolium-2-ide gave anionic N-heterocyclic carbenes on deprotonation at C4 which were trapped as methylated selenium adducts, gold complexes (x-ray anal.) as well as palladium complexes (x-ray anal.). The ¹³C NMR resonance frequencies of the carbene carbon atom are extremely shifted upfield and appear at δ = 142.1 ppm (Molsidomine carbene) and δ = 159.8 ppm (sydnone imine carbene). The Pd complexes were applied as catalysts in Suzuki-Miyaura and Sonogashira-Hagihara cross-coupling reactions.

Tetrahedron 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, SDS of cas: 52431-30-8.

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

Kulhanek, Jiri published the artcile3,4-Dinitrothiophene as a central unit of quadrupolar push-pull-push systems, Related Products of bromides-buliding-blocks, the publication is Chemistry of Heterocyclic Compounds (New York, NY, United States) (2017), 53(1), 46-53, database is CAplus.

A series of quadrupolar D-π-A-π-D mols. bearing methoxythiophene terminal donor and systematically enlarged/varied π-linkers, e.g., I was synthesized by employing cross-coupling and Knoevenagel reactions. 3,4-Dinitrothiophene was utilized as a central acceptor unit in quadrupolar D-π-A-π-D push-pull-push chromophores. Optical properties were studied by electronic absorption spectra. Fundamental optoelectronic properties were investigated by semiempirical PM7 calculations It was shown that by varying the p-conjugated system the longest wavelength absorption maxima could be shifted from 341 to 489 nm. The calculated HOMO-LUMO gaps were found within the range of 6.69-7.29 eV, while the second-order mol. polarizabilities could be tuned from 0.038 to 1.578 × 10-27 esu.

Chemistry of Heterocyclic Compounds (New York, NY, United States) 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

Jung, In Hwan published the artcileSynthesis and Search for Design Principles of New Electron Accepting Polymers for All-Polymer Solar Cells, SDS of cas: 52431-30-8, the publication is Chemistry of Materials (2014), 26(11), 3450-3459, database is CAplus.

New electron withdrawing monomers, thieno[2′,3′:5′,6′]pyrido[3,4-g]thieno[3,2-c]isoquinoline-5,11(4H,10H)-dione (TPTI) and fluorenedicyclopentathiophene dimalononitrile (CN), have been developed and used to form 12 alternating polymers having different monomer combinations: (a) weak donating monomer-strong accepting monomer, (b) weak accepting monomer-strong accepting monomer, (c) weak accepting monomer-weak accepting monomer, and (d) strong donating monomer-strong accepting monomer. It was found that LUMO energy levels of polymers are significantly determined by stronger electron accepting monomers and HOMO energy levels by the weak electron accepting monomers. In addition, fluorescent quantum yields of the TPTI-based polymers in chloroform solution are significantly decreased as the LUMO energy levels of the TPTI series of polymers become deeper. The quantum yield was found to be closely related with the photovoltaic properties, which reflects the effect of internal polarization on the photovoltaic properties. Only the electron accepting polymers showing SCLC mobility higher than 10^-4 Cm²/(V s) exhibited photovoltaic performance in blend films with a donor polymer, and the PTB7:PNPDI (1:1.8 weight/weight) device exhibited the highest power conversion efficiency of 1.03% (V_oc = 0.69 V, J_sc = -4.13 mA/Cm², FF = 0.36) under AM 1.5G condition, 100 W/Cm². We provide a large set of systematic structure-property relationships, which gives new perspectives for the design of electron accepting materials.

Chemistry of Materials 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, SDS of cas: 52431-30-8.

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

McNamara, Louis E. published the artcileDonor-Acceptor-Donor Thienopyrazines via Pd-Catalyzed C-H Activation as NIR Fluorescent Materials, COA of Formula: C4Br2N2O4S, the publication is Journal of Organic Chemistry (2016), 81(1), 32-42, database is CAplus and MEDLINE.

A series of thienopyrazine-based donor-acceptor-donor (D-A-D) near-IR (NIR) fluorescent compounds II were synthesized from I through a rapid, palladium-catalyzed C-H activation route. The dyes were studied through computational anal., electrochem. properties anal., and characterization of their photophys. properties. Large Stokes shifts of approx. 175 nm were observed, which led to near-IR emission. Computational evaluation shows that the origin of this large Stokes shift is a significant mol. reorganization particularly about the D-A bond. The series exhibits quantum yields of up to φ = >4%, with emission maxima ranging from 725 to 820 nm. The emission is strong in solution, in thin films, and also in isolation at the single-mol. level. Their stable emission at the single-mol. level makes these compounds good candidates for single-mol. photon sources in the near-IR.

Journal of Organic 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, COA of Formula: C4Br2N2O4S.

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

Peng, Qiang published the artcileThieno[3,4-b]pyrazine-based low bandgap photovoltaic copolymers: Turning the properties by different aza-heteroaromatic donors, Category: bromides-buliding-blocks, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2011), 49(20), 4458-4467, database is CAplus.

A new series of low-bandgap copolymers based on electron-accepting thieno[3,4-b]pyrazine (TPZ) and different electron-donating aza-heteroaromatic units, such as carbazole (CZ), dithieno[3,2-b:2′,3′-d]pyrrole (TPR) and dithieno[3,2-b:2′,3′-e]pyridine (TPY), have been synthesized by Suzuki or Stille coupling polymerization The resulting copolymers were characterized by NMR, elemental anal., gel permeation chromatog., thermogravimetric anal., and differential scanning calorimetry. UV-vis absorption and cyclic voltammetry measurements show that TPZ-based copolymer with TPR has the best absorption due to the strongest intramol. charge transfer effect and smallest bandgap. The basic electronic structure of D-A model compounds of these copolymers were also studied by d. functional theory (DFT) calculations The conclusion of calculation agreed also well with the exptl. results. The polymer solar cells (PSCs) based on these copolymers were fabricated with a typical structure of ITO/PEDOT:PSS/copolymer:PC₇₁BM/Ca/Al under the illumination of AM 1.5G, 100 mW cm^-2. The performance results showed that TPZ-based copolymer with TPR donor segments showed highest efficiency of 1.55% due to enhanced short-circuit c.d. The present results indicate that good electronic, optical, and photovoltaic properties of TPZ-based copolymers can be achieved by just fine-tuning the structures of aza-heteroaromatic donor segments for their application in PSCs. © 2011 Wiley Periodicals, Inc., J Polym Sci Part A: Polym Chem, 2011.

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, Category: bromides-buliding-blocks.

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

Tsai, Yu-Tang published the artcileFrequency-Selective Photobleaching as a Route to Chromatic Control in Supramolecular OLED Devices, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is ACS Applied Materials & Interfaces (2017), 9(41), 36045-36052, database is CAplus and MEDLINE.

Mols. that spontaneously self-organize into small electroluminescent domains of sub-μm dimensions when dissolved in THF are reported. The self-assembled spherical aggregates have an average diameter of 300 nm and exhibit efficient energy transfer from the blue to the green or red component. The aggregates can be chromatically addressed or patterned by selective bleaching of the energy-acceptor component using a laser source. This allows the fabrication of electroluminescence devices by directly photopatterning the active layer without the need of addnl. steps. Sub-μm features (700 nm) can be achieved using a collimated light source.

ACS Applied Materials & Interfaces 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 C10H7NO3, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Li, Jiuyan published the artcileNovel Thieno-[3,4-b]-Pyrazines Cored Dendrimers with Carbazole Dendrons: Design, Synthesis, and Application in Solution-Processed Red Organic Light-Emitting Diodes, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is ACS Applied Materials & Interfaces (2011), 3(6), 2099-2107, database is CAplus and MEDLINE.

A series of novel red-emitting thieno-[3,4-b]-pyrazine-cored mols. containing oligo-carbazole dendrons (called C1-TP, C2-TP) are synthesized. Their photophys., electrochem., and electroluminescent properties are investigated. The peripheral carbazolyl units facilitate the hole transporting ability and inhibit the intermol. interactions, but quench the fluorescence of the thieno-[3,4-b]-pyrazine core through intramol. charge transfer (ICT). Introduction of a polyphenyl spacer between the core and the first generation carbazole dendrons, i.e., C-DTP, decreases the ICT efficiency. In addition to providing the site-isolation effect on the planar emissive core, these bulky dendrons enable these mols. to be solution processable. As a result, efficient OLEDs with saturated red emission are fabricated by spin coating technique using these dendritic materials as nondoped emitting layer. C-DTP exhibits much better device performance than C1-TP and C2-TP, while the small mol. reference compound containing neither the spacer nor the carbazole dendrons (TP) fails to transmit pure red emission under identical conditions. A brightness of 925 cd m^-2 and a luminous efficiency of 0.53 cd A^-1 are obtained for C-DTP, which are comparable with OLEDs fabricated from thieno-[3,4-b]-pyrazine-based counterparts by the vacuum deposition method or those assembled with other red fluorescent dendrimers via the solution processing method.

ACS Applied Materials & Interfaces 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

Liu, Xingqiang published the artcileA Coordination Complex System for Generic, Ultrafast, and Sensitive Multimode Fluorescent Staining of Biomolecules, HPLC of Formula: 52431-30-8, the publication is Inorganic Chemistry (2012), 51(1), 188-192, database is CAplus and MEDLINE.

Gel electrophoresis staining methodologies documented thus far are largely utilized in a biomol. context-dependent manner. The authors report herein the development of a generic, ultrafast, and sensitive multimode fluorescent system for the efficient identification of DNA, RNA, and proteins. Interaction between a pos. charged, planar ligand-based coordination complex with partner biomol. leads to aggregation-induced fluorescence quenching and allows for the image contrast generation within one minute. Alternatively, successive reactions of the biomol.-loaded gel with cation and ligand, in either order of sequence, provide an equally effective staining efficacy. Image contrast reversal is accomplished through a facile washing or photobleaching procedure. The versatility in the applicable target species and signal generation modes provides a hint at the design of novel staining structures and potentially enables the high-throughput readout of biomols.

Inorganic 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, HPLC of Formula: 52431-30-8.

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

Abdulahi, Birhan A. published the artcileStructural engineering of pyrrolo[3,4-f]benzotriazole-5,7(2H,6H)-dione-based polymers for non-fullerene organic solar cells with an efficiency over 12%, Category: bromides-buliding-blocks, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2019), 7(33), 19522-19530, database is CAplus.

In this work, we have synthesized two wide band gap donor polymers based on benzo[1,2-b:4,5-b’]dithiophene (BDT) and pyrrolo[3,4-f]benzotriazole-5,7(2H,6H)-dione (TzBI), namely, PBDT-TzBI and PBDT-F-TzBI and studied their photovoltaic properties by blending them with ITIC as an acceptor. Polymer solar cell devices made from PBDT-TzBI:ITIC and PBDT-F-TzBI:ITIC exhibited power conversion efficiencies (PCEs) of 9.22% and 11.02% and while annealing at 160 °C, improved the device performances to 10.24% and 11.98%, resp. Upon solvent annealing with di-Ph ether (DPE) (0.5%) and chlorobenzene (CB), the PCE of the PBDT-F-TzBI-based device increased to 12.12%. The introduction of the fluorinated benzodithiophene (BDT-F) moiety on the backbone of PBDT-F-TzBI improved the open circuit voltage, short circuit current and fill factor simultaneously. The high PCEs of the PBDT-F-TzBI:ITIC-based devices were supported by comparison and anal. of the optical and electronic properties, the charge carrier mobilities, exciton dissociation probabilities, and charge recombination behaviors of the devices.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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, Category: bromides-buliding-blocks.

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