Category: 3141-27-3

Reference of 2,5-DibromothiopheneIn 2020 ,《Solution-Processed, Insoluble Thin Films through In Situ Chemical Polymerization of Semiconducting Native Polythiophene》 appeared in Physica Status Solidi A: Applications and Materials Science. The author of the article were Lebert, Jenny; Kratzer, Eva M.; Herzig, Eva M.. The article conveys some information:

The use of multilayer, solution-processed organic thin film devices can benefit strongly from the controlled deposition of insoluble thin films. Here, a solution-based in situ polymerization technique for semiconducting polythiophene thin films based on nonchlorinated solvents forming a range of large-scale structured or homogeneous, insoluble thin films is systematically developed. The high-quality nature of the resulting polythiophene thin films is demonstrated by successfully implementing the films in the active layer of bilayer heterojunction solar cells. It is possible to transfer this protocol to large-scale processing without addnl. changes to the material system. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Reference of 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Reference of 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Reference of 2,5-DibromothiopheneIn 2021 ,《Fabrication and assessment of an electrochromic and radar-absorbent dual device based on the new smart polythiophene-based/RGO/Fe3O4 ternary nanocomposite》 appeared in Chemical Engineering Journal (Amsterdam, Netherlands). The author of the article were Ahmadian-Alam, Leila; Jahangiri, Fatemeh; Mahdavi, Hossein. The article conveys some information:

Both polymeric electrochromic and radar absorption materials were considered as science hotspots over the past few decades. However, integrating both properties (electrochromic and radar absorption) in a single device was not addressed to fabricate a multifunctional device so far. Thus, here, the authors endeavor to shed light on this uncharted area by presenting a new smart ternary nanocomposite (polythiophene-based/RGO-Fe3O4) which can provide both electrochromic and microwave absorbent features simultaneously. In this regard, the authors synthesized the binary Fe3O4-RGO nanocomposites with different contents of Fe3O4 nanoparticles. Then, this binary nanocomposite is used in combination with a polythiophene-based conductive polymer as a tricolor (RGB) organic electrochromic material to synthesize the smart ternary nanocomposite through both in-situ polymerization and phys. mixing methods. The ternary nanocomposites containing different weight fractions of Fe3O4-RGO nanoparticles were used to assemble the rigid and flexible ECD devices using flat and fiber substrates such as glass-In Sn oxide (glass-ITO), polyethylene terephthalate-In Sn oxide (PET-ITO) and stainless steel wire (SSW). By applying a voltage of -2.1 to 2.1 v, a reversible color-switching ability was observed between green color (oxidized state), and red color (reduced state) for all ECDs. The average switching time and color memory for the SSW cell are ∼3 s and 155 min, and for both glass-ITO and PET-ITO cells to be 2 s and 210 min, resp. Addnl., the microwave absorption properties of the prepared ternary nanocomposites were characterized by measuring the electromagnetic parameters such as permittivity, permeability, and reflection loss. A ternary nanocomposite with 3 mm thickness filled with 50% Fe3O4-RGO exhibited a maximum reflection loss ≤-30.2 dB (92% absorption) at 12.3 GHz (in the range of x-bond) with 1.1 GHz bandwidth.2,5-Dibromothiophene(cas: 3141-27-3Reference of 2,5-Dibromothiophene) was used in this study.

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Reference of 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 3141-27-3In 2022 ,《Thienoviologen anolytes for aqueous organic redox flow batteries with simultaneously enhanced capacity utilization and capacity retention》 was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability. The article was written by Liu, Xu; Zhang, Xuri; Li, Guoping; Zhang, Sikun; Zhang, Bingjie; Ma, Wenqiang; Wang, Zengrong; Zhang, Yueyan; He, Gang. The article contains the following contents:

A series of thienoviologen derivatives ([(NPr)2TV]Cl4 and [(OHPr)2TV]Cl2) with a narrow bandgap, high solubility and two-electron transfer properties as anolytes for high-performance aqueous organic redox flow batteries (AORFBs) is reported. Compared with [(OHPr)2TV]Cl2 and other viologen anolytes, [(NPr)2TV]Cl4 showed a higher diffusion coefficient (D, 3.36 x 10-6 cm2 s-1) and electron transfer constant (k0, 0.31 cm s-1). Paired with (ferrocenylmethyl)-trimethylammonium chloride (FcNCl) as the catholyte, the specific capacity of the [(NPr)2TV]Cl4/FcNCl AORFB reached 4.62 A h L-1, and the capacity utilization was up to 86.1%. Moreover, the system also maintained high stability over 300 cycles and delivered 87.9% capacity retention and 99.96% capacity retention per cycle. The simultaneously enhanced capacity retention and capacity utilization of [(NPr)2TV]Cl4-based AORFBs were attributed to the high D and k0, resulting from the smaller mol. volume (583.38 Å3) and appropriate dihedral angle (∼18.37°) between the pyridines. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Recommanded Product: 3141-27-3)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Recommanded Product: 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Safety of 2,5-DibromothiopheneIn 2022 ,《Water-soluble thienoviologen derivatives for imaging bacteria and antimicrobial photodynamic therapy》 was published in Journal of Materials Chemistry B: Materials for Biology and Medicine. The article was written by Guo, Mengying; Zhou, Kun; Ding, Rui; Zhao, Xiaodan; Zhang, Yueyan; Zhang, Zixi; He, Gang. The article contains the following contents:

A series of water-soluble cationic thienoviologen derivative photosensitizers (nTPy-Rs) for photodynamic therapy (PDT) is reported. Cationic pyridine groups were introduced into the thiophene framework to enhance solubility and bacteria-binding ability, which effectively improved bacteriol. imaging and antibacterial activity. The optoelectronic properties of nTPy-Rs were regulated by adjusting the number of thiophene groups, and the differences in antibacterial activity due to the functional scaffolds were compared. The results showed that nTPy-Rs could generate reactive oxygen species (ROS, including macroscopic free radicals), efficiently inhibit bacterial growth, and achieve the min. inhibitory concentration (MIC) to the ng mL-1 level. Remarkably, 2TPyC6, containing two thiophene groups and modified by alkyl side chains, showed the best bacteriostatic performance, with the MIC of 20 ng mL-1 and 4.5 ng mL-1 for E. coli and S. aureus, resp., which are the lowest photosensitizer concentrations used in PDT to date. The low cell cytotoxicity and excellent antibacterial performance give nTPy-Rs great potential as PDT agents in vivo. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Safety of 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Safety of 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Enzyme activity of thiophene-fluorene based-copolymer blended with urease in thin films》 was published in Colloids and Surfaces, A: Physicochemical and Engineering Aspects in 2020. These research results belong to Rodrigues, Rebeca da Rocha; de Aquino, Tamires Pedrali; Caseli, Luciano; Peres, Laura Oliveira. Name: 2,5-Dibromothiophene The article mentions the following:

Enzyme activity can be boosted if the mol. architecture of films is manipulated. In this paper, we show an alternative way to immobilize the enzyme urease in a matrix composed of the copolymer poly[(9,9-dioctylfluorene)-co-thiophene] by using the spin coating method. The films were characterized with Fluorescence, UV-vis, and IR spectroscopies, confirming not only the adsorption of the enzyme, but also the maintenance of its secondary structure. Enzyme activity of the blended films was evaluated in terms of hydrolysis of urea as a heterogeneous catalyst. As measured with UV-vis spectroscopy, the blended films presented substrate-enzyme affinity in relation to the Langmuir-Blodgett method, which may be important for the production of enzymic sensors with enhanced performance. This increase was related to the configurational disorder in the copolymer/enzyme blend with their chains being intertwined, facilitating the access of urea to the catalytic site of the enzyme. The experimental part of the paper was very detailed, including the reaction process of 2,5-Dibromothiophene(cas: 3141-27-3Name: 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Name: 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Conjugation-extended viologens with thiophene derivative bridges: near-infrared electrochromism, electrofluorochromism, and smart window applications》 was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2020. These research results belong to Chang, Meijuan; Chen, Weinan; Xue, Haodong; Liang, Dingli; Lu, Xuefeng; Zhou, Gang. Recommanded Product: 2,5-Dibromothiophene The article mentions the following:

Two types of thiophene derivatives, i.e., thiophene (T) and 3,4-ethylenedioxylthiophene (ET) with a single thiophene ring, and thieno[3,2-b]thiophene (TT) and 2,2′-bithiophene (BT) with double thiophene rings, have been inserted between the two pyridinium units of an octyl viologen (V). The effective conjugation lengths of the resulting thienoviologens TV, ETV, TTV, and BTV have been successfully extended. Unlike a traditional alkyl viologen, which always serves as a fluorescence quencher, all four thienoviologens exhibit intense photoluminescence (PL). The bathochromic shifts in both absorption and PL spectra are more pronounced in TTV and BTV with double thiophene rings as compared with TV and ETV with a single thiophene bridge. Moreover, upon applying a neg. potential, all four thienoviologens display significant changes in both absorption and PL spectra, indicating their electrochromic (EC) and electrofluorochromic (EFC) properties. Addnl., the EC response can be found not only in the visible but also in the near-IR (NIR) region. Although TTV and BTV with longer conjugated bridges exhibit more extended effective conjugation lengths and higher PL quantum yields, the EC and EFC devices based on TV and ETV gels display better performance than that for TTV and BTV owing to the faster charge and mass transport for smaller mols. Consequently, a better comprehensive property is achieved by the ETV-based gel, which demonstrates fast coloration (1.9 s), high color contrast (87%), and high coloration efficiency (521 cm2 C-1) in the EC device with high fluorescence contrast ratio (Ion/Ioff = 221) in the EFC device. Furthermore, two smart windows have been fabricated to utilize their different driving potentials. Upon increasing the potential, the “”window flower”” in the first device blossoms out with gradually changing petal colors, while the other dual-functional smart window can be adjusted between flower decoration and light blocking functions. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Recommanded Product: 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Recommanded Product: 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Feriancova, Lucia; Cigan, Marek; Kozisek, Jozef; Gmucova, Katarina; Nadazdy, Vojtech; Dubaj, Tibor; Sobota, Michal; Novota, Miroslav; Weis, Martin; Putala, Martin published an article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices. The title of the article was 《Dithienylnaphthalenes and quaterthiophenes substituted with electron-withdrawing groups as n-type organic semiconductors for organic field-effect transistors》.SDS of cas: 3141-27-3 The author mentioned the following in the article:

The authors report a successful design strategy for n-type semiconductor materials based on an analogy with efficient p-type semiconductors, by introducing electron-withdrawing groups while maintaining the symmetry of the mols. upon omitting one thiophene unit on each side of the oligoaryl core. Two series of dithienylnaphthalenes and quaterthiophenes substituted with various electron-withdrawing groups have been synthesized using Suzuki or Stille cross-coupling, and Knoevenagel condensation as key steps. The comparison of theor. and exptl. mol. properties related to the effect of electron-withdrawing groups is presented. Both the DFT-calculated and exptl. determined values of the energy gap between frontier orbitals have shown a decreasing trend in the order of perfluoroalkyl, acyl, perfluoroacyl, nitro, alkyldicyanovinyl and perfluoroalkyldicyanovinyl in both series. The x-ray anal. of five derivatives revealed almost planar geometry of the oligoaryl core with a herringbone or lamellar packing motif. The crystal structures of quaterthiophenes exhibited an s-cis conformation between the outer thiophenes in the crystals, in contrast to the theor. prediction. Carbonyl-based compounds showed n-type behavior as an active layer in OFET devices with an electron mobility of up to 0.57 cm2 V-1 s-1. The results came from multiple reactions, including the reaction of 2,5-Dibromothiophene(cas: 3141-27-3SDS of cas: 3141-27-3)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.SDS of cas: 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Dong, Changshuai; Meng, Bin; Liu, Jun; Wang, Lixiang published an article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices. The title of the article was 《An n-type narrow-bandgap organoboron polymer with quinoidal character synthesized by direct arylation polymerization》.SDS of cas: 3141-27-3 The author mentioned the following in the article:

Narrow bandgap conjugated polymers have received great attention due to their wide applications in optoelectronic devices. Because of the synthetic difficulty, it is greatly challenging to develop n-type conjugated polymers with a narrow bandgap with quinoidal character. Herein, we report an n-type narrow-bandgap organoboron polymer with quinoidal character, PBN-TP. PBN-TP is designed with alternating units of BNBP (double B ← N bridged bipyridine) and quinoidal TP (thieno[3,4-b]pyrazine). Direct arylation polymerization of the di-bromo BNBP unit and the di-hydro TP unit affords the organoboron polymer with a high number-average mol. weight of 28.3 kDa. Compared with the control polymer with alternating units of BNBP and thiophene, PBN-T, the replacement of the thiophene unit with a quinoidal TP unit reduces the bond length alternation (BLA) of carbon-carbon bonds and planarized the polymer backbone of PBN-TP, leading to an enhanced contribution of the polymer quinoidal resonance structure. As a result, compared with PBN-T, PBN-TP shows a much reduced bandgap of 1.50 eV, which is among the lowest reported for n-type organoboron polymers based on BNBP. Moreover, due to the low LUMO energy level, PBN-TP could be readily n-doped and used as an n-type polymer thermoelec. material. This work provides a new n-type narrow bandgap conjugated polymer with quinoidal character. In the experiment, the researchers used many compounds, for example, 2,5-Dibromothiophene(cas: 3141-27-3SDS of cas: 3141-27-3)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used as starting reagent for the synthesis of α,α′-didecylquater-, -quinque- and -sexi-thiophenes.SDS of cas: 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Original synthesis and spectroscopic study of thiophene triazine derivatives with enhanced luminescence properties》 was written by Rodrigues, Alysson Duarte; Marcotte, Nathalie; Quignard, Francoise; Deabate, Stefano; Robitzer, Mike; Lerner, Dan A.. Synthetic Route of C4H2Br2SThis research focused onthiophene triazine preparation arylation palladium catalyst fluorescence quantum yield; Fluorescence; Fluorescent label; Oligothiophene; Palladium catalyzed C–H arylation; Thiophene; Triazine. The article conveys some information:

A straightforward access to π-conjugated oligothiophenes bearing amino-rich groups was developed. Palladium-catalyzed C-H arylation applied in the main step of the synthesis allowed to couple 2-thiophenecarbonitriles and aryl bromides with moderate to excellent yields (35-93%). Then, to improve their basic fluorescence properties, these compounds were transformed into their 2,4-diamino-1,3,5-triazine derivatives, also with good to excellent yields (74-98%). UV-Visible absorption and fluorescence studies identified a strongly emissive mol. (fluorescence quantum yield: ΦF = 0.78 ± 0.05), which could find use in sensors for applications in biol. and in material chem. We observed an antagonistic effect in the spectroscopic properties of oligothiophenes bearing 2,4-diamino-1,3,5-triazine, resulting in improved absorptive and emissive properties for more constrained structures having shorter oligothiophenes chains. After reading the article, we found that the author used 2,5-Dibromothiophene(cas: 3141-27-3Synthetic Route of C4H2Br2S)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Synthetic Route of C4H2Br2S

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Walesa-Chorab, Monika; Muras, Kacper; Filiatrault, Heather L.; Skene, W. G. published an article in 2022. The article was titled 《Suitability of alkyne donor-π-donor-π-donor scaffolds for electrofluorochromic and electrochromic use》, and you may find the article in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices.Recommanded Product: 2,5-Dibromothiophene The information in the text is summarized as follows:

A series of electroactive materials consisting of an aromatic core that was conjugated with two alkynes and flanked with two tri-Ph amines was investigated as electrochromes and electrofluorochromes. The yellow colored conjugated donor-π-donor-π-donor (D-π-D-π-D) alkynes could be electrochem. oxidized because of the terminal triphenylamine amines. The oxidation potential varied by 170 mV contingent on the central aromatic core (thiophene and EDOT) and whether the electroactive group was either unsubstituted or substituted with methyls in the 4,4′-positions. The emission of the chromophores was also contingent on the solvent and it spanned upwards of 90 nm. The emission yield was consistent (ca. 40%) and it was insensitive to the type of aromatic core, the triphenylamine substitution, and the solvent. The collective visible color and the electroactivity of the D-π-D-π-D compounds were ideal properties for electrochromic applications. The compounds underwent reversible color change from yellow to blue with the applied potential. The electrochromic devices fabricated from the D-π-D-π-D alkynes could be operated upwards of 15 h and operating devices that were flexible could also be prepared The intrinsic fluorescence of the D-π-D-π-D compounds could be reversibly turned-off with the applied potential, which enables them to be used in operating electrofluorochromic devices. Although the alkyne framework was robust for electrochromic use, it could react with tetracyanoethylene, leading to octanitrile substituted D-π-A-π-D-π-A-π-D chromophores that were red in color. The experimental process involved the reaction of 2,5-Dibromothiophene(cas: 3141-27-3Recommanded Product: 2,5-Dibromothiophene)

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Recommanded Product: 2,5-Dibromothiophene

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary