Category: 303734-52-3

Tlach, Brian C. published the artcileEffect of Extended Conjugation on the Optoelectronic Properties of Benzo[1,2-d:4,5-d’]bisoxazole Polymers, SDS of cas: 303734-52-3, the publication is Australian Journal of Chemistry (2014), 67(5), 711-721, database is CAplus.

Four copolymers comprising benzo[1,2-d:4,5-d’]bisoxazole (BBO) and benzo[1,2-b:4,5-b’]dithiophene (BDT) bearing phenylethynyl substituents on either the BBO, BDT moieties or both units were synthesized and the influence of two-dimensional conjugation on their optoelectronic properties investigated. Extending conjugation along the BBO resulted in a 0.5eV decrease in the LUMO level, whereas the HOMO level was raised by 0.2eV. Extending conjugation across the BDT moiety in also resulted in a 0.5eV decrease in the LUMO level, however, the effect was negligible on the HOMO level. Thus, cross-conjugation can be used to independently tune the LUMO level within these systems.

Australian Journal of Chemistry 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 C5H10Cl3O3P, SDS of cas: 303734-52-3.

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

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

Choi, Min Hee published the artcileEffect of side chains on solubility and morphology of poly(benzodithiohene-alt-alkylbithiophene) in organic photovoltaics, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) (2015), 120-128, database is CAplus.

It was reported that the side chains play especially an important role in enhancing phys. properties and energy levels. Polythiophene based on benzodithiophene has excellent carrier mobility, but high HOMO level. We synthesized polythiophenes, PBDTBiTh(2EH) and PBDTBiTh(12C), were polymerized using the Stille coupling reaction and had thiophene with a 2-ethylhexyl or n-dodecyl side chain. Upon introducing the 2-ethylhexyl side chain, the absorption coefficients of the monomers and polymers were enhanced. Also, the edge-on orientation was fortified and the HOMO level was decreased to -5.37 eV. PBDTBiTh(2EH) showed a power conversion efficiency (PCE) of 2.1%, which was double that of PBDTBiTh(12C).

Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) 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, Recommanded Product: 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Akkuratov, Alexander V. published the artcileDesign of novel thiazolothiazole-containing conjugated polymers for organic solar cells and modules, Application In Synthesis of 303734-52-3, the publication is Solar Energy (2020), 605-611, database is CAplus.

One of the major challenges in the field of organic photovoltaics is associated with high-throughput manufacturing of efficient and stable organic solar cells. Practical realization of technologies for production of large-area organic solar cells requires the development of novel materials with a defined combination of properties ensuring sufficient reliability and scalability of the process in addition to good efficiency and operation stability of the devices. In this work, we designed two novel polymers comprising thiazolothiazole units and investigated their performance as absorber materials for organic solar cells and modules. Optimized small-area solar cells based on P1/[70]PCBM ([6,6]-phenyl-C71-butyric acid Me ester) blends exhibited promising power conversion efficiency (PCE) of 7.5%, while larger area modules fabricated using slot die coating showed encouraging PCE of 4.2%. Addnl., the fabricated devices showed promising outdoor stability maintaining 60-70% of the initial efficiency after 20 sun days being exposed to natural sunlight at the Negev desert. The obtained results feature the designed polymer P1 as a promising absorber material for a large-scale production of organic solar cells under ambient conditions.

Solar Energy 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, Application In Synthesis of 303734-52-3.

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

Eckstein, Brian J. published the artcileButa-1,3-diyne-Based π-Conjugated Polymers for Organic Transistors and Solar Cells, Application In Synthesis of 303734-52-3, the publication is Macromolecules (Washington, DC, United States) (2017), 50(4), 1430-1441, database is CAplus.

We report the synthesis and characterization of new alkyl-substituted 1,4-di(thiophen-2-yl)buta-1,3-diyne (R-DTB) donor building blocks, based on the -CC-CC- conjugative pathway, and their incorporation with thienyl-diketopyrrolopyrrole (R’-TDPP) acceptor units into π-conjugated PTDPP-DTB polymers (P1-P4). The solubility of the new polymers strongly depends on the DTB and DPP solubilizing (R and R’, resp.) substituents. Thus, solution processable and high mol. weight PDPP-DTB polymers are achieved for P3 (R = n-C₁₂H₂₅, R’ = 2-butyloctyl) and P4 (R = 2-ethylhexyl, R’ = 2-butyloctyl). Systematic studies of P3 and P4 physicochem. properties are carried using optical spectroscopy, cyclic voltammetry, and thermal anal., revealing characteristic features of the dialkynyl motif. For the first time, optoelectronic devices (OFETs, OPVs) are fabricated with 1,3-butadiyne containing organic semiconductors. OFET hole mobilities and record OPV power conversion efficiencies for acetylenic organic materials approach 0.1 cm²/(V s) and 4% resp., which can be understood from detailed thin-film morphol. and microstructural characterization using AFM, TEM, x-ray diffraction, and GIWAXS methodologies. Importantly, DTB-based polymers (P3 and P4) exhibit, in addition to stabilization of frontier MOs and to -CC-CC- relief of steric torsions, discrete morphol. pliability through thermal annealing and processing additives. The advantageous materials properties and preliminary device performance reported here demonstrate the promise of 1,3-butadiyne-based semiconducting polymers.

Macromolecules (Washington, DC, United States) 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, Application In Synthesis of 303734-52-3.

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

Gunathilake, Samodha S. published the artcileSynthesis and characterization of novel semiconducting polymers containing pyrimidine, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene, the publication is Polymer Chemistry (2013), 4(20), 5216-5219, database is CAplus.

The acidic Me protons of 4,6-dimethylpyrimidines can be easily deprotonated with a base to generate a resonance stabilized carbanion which can be used as a substrate for aldol condensation reactions. A series of novel conjugated polymers were synthesized by the aldol condensation reaction of 2-decyloxy-4,6-dimethylpyrimidine with various aromatic dialdehydes.

Polymer Chemistry 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, Safety of 2-Bromo-3-(2-ethylhexyl)thiophene.

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

Shames, Alexander I. published the artcileAssessing the outdoor photochemical stability of conjugated polymers by EPR spectroscopy, Quality Control of 303734-52-3, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2016), 4(34), 13166-13170, database is CAplus.

We report the first outdoor study of the intrinsic photochem. stability of a series of conjugated polymers encapsulated in an inert atm. and exposed to natural sunlight illumination conditions in the Negev Desert. The photoinduced aging effects resulting in the modification of the chem. structures of the materials and the appearance of persistent radical species in the samples were revealed by EPR spectroscopy. Comparing the degradation profiles normalized to the total number of absorbed photons allowed us to establish some correlations between the chem. structures of polymers (and even particular building blocks) and their photostability. Our approach may be widely used for the facile screening of many existing conjugated polymers with respect to their intrinsic photostability under outdoor solar conditions as well as for the elaboration of guidelines for designing novel promising materials for stable and efficient organic photovoltaics.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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 C14H22O2, Quality Control of 303734-52-3.

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

Doba, Takahiro published the artcileIron-catalysed regioselective thienyl C-H/C-H coupling, Computed Properties of 303734-52-3, the publication is Nature Catalysis (2021), 4(7), 631-638, database is CAplus.

Regioselective thienyl-thienyl coupling is arguably one of the most important transformations for organic electronic materials. A prototype of ideal organic synthesis to couple two thienyl groups by cutting two C-H bonds requires formal removal of two hydrogen atoms with an oxidant, which often limits the synthetic efficiency and versatility for oxidation-sensitive substrates (for example, donor and hole-transporting materials). Here, we found that di-Et oxalate, used together with AlMe3, acts as a two-electron acceptor in an iron-catalyzed C-H activation. We describe the regioselective thienyl C-H/C-H coupling with an iron(III) catalyst, a trisphosphine ligand, AlMe3 and di-Et oxalate under mild conditions. The efficient catalytic system accelerated by ligand optimization polymerizes thiophene-containing monomers into homo- and copolymers bearing a variety of electron-donative π motifs. The findings suggest the versatility of iron catalysis for the synthesis of functional polymers, for which the potential of this ubiquitous metal has so far not been fully appreciated.

Nature Catalysis 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, Computed Properties of 303734-52-3.

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