Tag: M.W=300-350

Moon, Yejin published the artcileLight-Insensitive Organic Field-Effect Transistors with n-Type Conjugated Polymers Containing Dinitrothiophene Units, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Advanced Electronic Materials (2018), 4(11), n/a, database is CAplus.

Here, it is reported that organic field-effect transistors (OFETs) with n-type conjugated polymer, poly[{2,5-bis-(2-octhyldodecyl)-3,6-bis-(thien-2-yl)-pyrrolo[3,4-c]pyrrole-1,4-diyl}-co-{2,2′-(3,4-dinitrothiophene)]-5,5′-diyl}] (PODTPPD-DNT), can be operated without large disturbance by surrounding light. The PODTPPD-DNT polymer synthesized via the Stille coupling reaction could act as a channel layer for n-channel OFETs. Although the PODTPPD-DNT polymer shows a broad optical absorption from UV to near-IR parts up to 1000 nm, the OFETs with the PODTPPD-DNT channel layers do not almost respond to monochromatic (520 and 780 nm) and white light. The reason is assigned to the exciton quenching effect by two nitro groups in the polymer chain. The semitransparent OFETs with the 20 nm thick PODTPPD-DNT channel layers are also almost light-insensitive for operation under typical room light conditions.

Advanced Electronic 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, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Zoombelt, Arjan P. published the artcileThe influence of side chains on solubility and photovoltaic performance of dithiophene-thienopyrazine small band gap copolymers, Category: bromides-buliding-blocks, the publication is Polymer (2009), 50(19), 4564-4570, database is CAplus.

Three small band gap copolymers based on alternating dithiophene and thienopyrazine units were synthesized via Yamamoto coupling and applied in bulk heterojunction solar cells as donor together with PCBM ([6,6]-Ph C₆₁ butyric acid Me ester) as acceptor. The polymers have an optical band gap of ∼1.3 eV in the solid state and only vary by the chem. nature of the solubilizing side chains. The nature of the side chain has a major effect on solubility and processability of the polymer. Using n-butoxymethyl side chains a soluble, easy to process polymer was obtained that gave the best photovoltaic performance. With short-circuit currents up to 5.2 mA/cm² an efficiency of 0.8% was achieved under estimated standard solar light conditions (air-mass 1.5G, 100 mW/cm²) with spectral response up to 950 nm.

Polymer 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 C37H30ClIrOP2, Category: bromides-buliding-blocks.

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

Jeong, Jaemyeng published the artcileSynthesis and characterization of triphenylamine-based polymers and their application towards solid-state electrochromic cells, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is RSC Advances (2016), 6(82), 78984-78993, database is CAplus.

Four novel triphenylamine-based polymers, PJK1, PJK2, PJK3 and PJK4 were successfully synthesized and fully characterized by ¹H NMR, UV-VIS spectroscopy, cyclic voltammetry (CV), GPC and spectroelectrochem. These polymers are easily soluble in many common organic solvents, which make them appropriate for film deposition via spray-coating. We fabricated electrochromic cells comprising ITO-coated glass/polymer/gel electrolyte/ITO-coated glass and patterned the color change by applying d.c. with different voltages. We report herein color changes, from the neutral to oxidized form as follows: for PJK1, orange to dark green; for PJK2, light yellow to reddish brown; for PJK3, light blue to gray; and for PJK4, green to bluish green. The majority of the copolymers exhibited very good thermal stabilities, as evidenced by less than a 5% weight loss in temperatures exceeding 400°C. To further characterize, we simulated the electrochem. and optical properties, which are good agreement with the exptl. data.

RSC Advances 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

Ju, Xiuping published the artcileSynthesis and electrochemical capacitive performance of thieno[3,4-b]pyrazine-based Donor-Acceptor type copolymers used as supercapacitor electrode material, Synthetic Route of 52431-30-8, the publication is Electrochimica Acta (2017), 36-48, database is CAplus.

Two novel donor-acceptor-donor type monomers were synthesized by using thieno[3,4-b]pyrazine (TPZ) as the acceptor units (A) and 3-methylthiophene or 3-methoxythiophene as the donor units (D). The as-prepared D-A-D monomers were named as MOTP and MTP, resp. These two monomers could be facilely polymerized on the glass carbon electrode (GCE) via a potentiostatic method, and the resultant D-A-D alternative conjugated polymers were referred as PMOTP and PMTP. The obtained conjugated polymers were routinely characterized by FT-IR, SEM and TGA at first. Then, as supercapacitor electrode materials, they were further investigated in detail by cyclic voltammetry (CV), constant galvanostatic charge-discharge (GCD) and electrochem. impedance spectroscopy (EIS) methods The GCD results showed that the polymer-modified GCEs had high specific capacitances of 678.2 and 319.1 F/g, for PMOTP and PMTP, resp., at a c.d. of 1 A/g. Excellent switching stabilities were also observed for both polymer-modified GCEs, with the high retention rates of 77.3% and 53.4% for PMOTP and PMTP, resp., after 1000 times of charge-discharge cycling at a c.d. of 10 A/g. Notably, the maximum energy densities of 22.4 Wh/kg and 7.94 Wh/kg were attained at the power d. of 0.55 kW/kg for the sym. supercapacitor based on PMOTP and PMTP, resp. The excellent performances of these two D-A-D type conjugated polymers make them to be the promising electrode materials for energy-storage and conversion applications.

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 C4Br2N2O4S, Synthetic Route of 52431-30-8.

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

Zhang, Yan published the artcileThree novel donor-acceptor type electrochromic polymers containing 2,3-bis(5-methylfuran-2-yl)thieno[3,4-b]pyrazine acceptor and different thiophene donors: Low-band-gap, neutral green-colored, fast-switching materials, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Journal of Electroanalytical Chemistry (2018), 7-19, database is CAplus.

Three novel donor-accept type electrochromic polymers with very low band gap, PMFTTP, PMFBTTP and PMFMOTTP, were prepared via electrochem. polymerization, employing 2,3-bis(5-methylfuran-2-yl)thieno[3,4-b]pyrazine as the acceptor units and thiophene, butylthiophen and methoxythiophene as the donor units, resp. All the polymers were comparatively studied by cyclic voltammetry (CV), scanning electron micrographs (SEM), UV-visible-NIR spectroscopy and colorimetry. PMFTTP and PMFBTTP showed obvious color change from green color to brown in the oxidation process, while PMFMOTTP exhibited color change from brick red to dark gray. And the three polymers possessed very low optical band gaps in the following order: PMFTTP (1.23 eV) > PMFBTTP (0.88 eV) > PMFMOTTP (0.74 eV), which demonstrated the different election-donating ability of thiophene or its derivatives The electrochromic kinetic studies manifested that the polymers presented satisfactory optical contrasts (ΔT%) in the near IR region (NIR), which were 35%, 67% and 60% for PMFTTP, PMFBTTP and PMFMOTTP, resp. Also, the polymers also displayed short switching times (<1 s at any wavelengths), high coloration efficiencies (around ∼200 cm²/C) and outstanding robust stabilities, suggesting the probability of being the promising candidates for the electrochromic devices. In summary, the above pos. results, especially the neutral green color and the very low band gap, had important theor. significance for the application and development of electrochromic polymers.

Journal of Electroanalytical 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 C20H19FN2O2, Recommanded Product: 2,5-Dibromo-3,4-dinitrothiophene.

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

Speck, J. Matthaeus published the artcileFerrocenes Bridged by Ethylenediamino Thiophene: Varying Charge Transfer Properties in a Series of 3,4-Di-N-substituted 2,5-Diferrocenyl Thiophenes, Safety of 2,5-Dibromo-3,4-dinitrothiophene, the publication is Organometallics (2015), 34(15), 3788-3798, database is CAplus.

A series of 3,4-di-N-substituted 2,5-diferrocenyl thiophenes is reported with the aim to explore the electronic interaction between the organometallic termini over their bridging unit. The syntheses of thiophenes 1–4 were implemented on the basis of 2,5-diferrocenyl-3,4-dinitrothiophene (1), which is accessible within a Pd-promoted Suzuki-Miyaura C,C cross-coupling reaction. Reduction of the nitro functionalities and a subsequent methylation or condensation reaction gives 2,5-diferrocenyl-3,4-bis(N,N-dimethylamino)-thiophene (2) or 5,7-diferrocenylthieno[3,4-b]pyrazine (3). Finally, 5,7-diferrocenyl-1,4-dimethyl-1,2,3,4-tetrahydrothieno[3,4-b]pyrazine (4) could be synthesized through conversion of 3 in a two-step reduction/methylation reaction. The spectroscopic characterization of 1–4 was complemented by the investigation of their structural properties in the solid state. The latter disclose no significant influence of the electronically different N substituents on the thiophene bond distances and angles in the solid state. UV-vis solvatochromic studies on thiophenes 1 and 3 in 40 different solvents offer a moderate pos. solvatochromic shift of the MLCT absorption of 1; however, for pyrazine 3 a slight neg. solvatochromism of the appropriate absorption band was observed The electrochem. studies on thiophenes 1–4 reveal an increasing thermodn. stability of the mixed-valent species (K_C) in the order 1 < 2 ≈ 3 < 4. In situ UV-vis-NIR spectroelectrochem. examinations verify these observations. Thus, the NIR absorptions of the corresponding mixed-valent species become more intense and less solvatochromic as the electron-donating effect and the extent of the electronic π system of the bridging unit increase. Hence, the electronic coupling between the iron-based redox centers over the thiophene-based core increases in the order 1 < 2 ≈ 3 < 4.

Organometallics 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 C11H21BF4N2O2, Safety of 2,5-Dibromo-3,4-dinitrothiophene.

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

Boebel, Timothy A. published the artcileConversion of 1,3-disubstituted arenes to chiral α,α-diaryl methylammonium chlorides using arene borylation, Formula: C13H18BBrO3, the publication is Tetrahedron (2008), 64(29), 6824-6830, database is CAplus.

A two-step conversion of 1,3-disubstituted arenes to chiral α,α-diaryl methylammonium chlorides is described. In this procedure, arenes are converted to aryl boronic esters by iridium-catalyzed borylation, and the aryl boronic esters are converted to enantioenriched amines by subsequent rhodium-catalyzed addition to chiral tert-butanesulfinamides.

Tetrahedron 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, Formula: C13H18BBrO3.

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

Jayasundara, Chathurika R. K. published the artcileMerging Iridium-Catalyzed C-H Borylations with Palladium-Catalyzed Cross-Couplings Using Triorganoindium Reagents, Category: bromides-buliding-blocks, the publication is Journal of Organic Chemistry (2022), 87(1), 751-759, database is CAplus and MEDLINE.

A versatile and efficient method to prepare borylated arenes furnished with alkyl, alkenyl, alkynyl, aryl and heteroaryl functional groups is developed by merging Ir-catalyzed C-H borylations (CHB) with a chemoselective Pd-catalyzed cross-coupling of triorganoindium reagents (Sarandeses-Sestelo coupling) with aryl halides bearing a boronic ester substituent. Using triorganoindium cross-coupling reactions to introduce unsaturated moieties enables the synthesis of borylated arenes that would be difficult to access through the direct application of the CHB methodol. The sequential double catalyzed procedure can be also performed in one vessel.

Journal of Organic Chemistry published new progress about 942069-47-8. 942069-47-8 belongs to bromides-buliding-blocks, auxiliary class Boronic acid and ester,Boronic Acids,Boronate Esters, name is 2-(3-Bromo-4,5-dimethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, and the molecular formula is C14H20BBrO2, Category: bromides-buliding-blocks.

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

Li, Yang published the artcileOrganic NIR-II dyes with ultralong circulation persistence for image-guided delivery and therapy, Formula: C4Br2N2O4S, the publication is Journal of Controlled Release (2022), 157-169, database is CAplus and MEDLINE.

Nanocarriers hold great promise for the controlled release of therapeutic payloads to target organs/tissues and extended duration of anticancer agents in the bloodstream. However, limited data on their in vivo pharmacokinetics and delivery process hamper clin. applications. Here we report a series of micellar nanocarriers self-assembled from new-generation thiophenthiadiazole (TTD)-based NIR-II fluorophores HLAnP (n = 1-4) for simultaneous bioimaging and drug delivery. The NIR-II HLA4P nanocarrier displays exceptional non-fouling performance, minimal immunogenicity, ultralong blood half-life, and high tumor accumulation even with different administration routes. When used as a drug carrier, HLA4P with encapsulated doxorubicin (DOX) realized accurate tumor targeting and continuous real-time in vivo NIR-II tracking of drug delivery and therapy, showing a sustained release rate, improved therapeutic effect, and diminished cardiotoxicity as compared to free DOX. This study provides a new perspective on the design of dual-functional NIR-II fluorophores for diagnostic and therapeutic applications.

Journal of Controlled Release 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

Hu, Qinglian published the artcileMitochondria-Targeted Cancer Therapy Using a Light-Up Probe with Aggregation-Induced-Emission Characteristics, Safety of 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, the publication is Angewandte Chemie, International Edition (2014), 53(51), 14225-14229, database is CAplus and MEDLINE.

Subcellular organelle-specific reagents for simultaneous tumor targeting, imaging, and treatment are of enormous interest in cancer therapy. Herein, the authors present a mitochondria-targeting probe (AIE-mito-TPP) by conjugating a triphenylphosphine (TPP) with a fluorogen which can undergo aggregation-induced emission (AIE). Owing to the more neg. mitochondrial membrane potential of cancer cells than normal cells, the AIE-mito-TPP probe can selectively accumulate in cancer-cell mitochondria and light up its fluorescence. More importantly, the probe exhibits selective cytotoxicity for studied cancer cells over normal cells. The high potency of AIE-mito-TPP correlates with its strong ability to aggregate in mitochondria, which can efficiently decrease the mitochondria membrane potential and increase the level of intracellular reactive oxygen species (ROS) in cancer cells. The mitochondrial light-up probe provides a unique strategy for potential image-guided therapy of cancer cells.

Angewandte Chemie, International Edition published new progress about 1207448-58-5. 1207448-58-5 belongs to bromides-buliding-blocks, auxiliary class Bromide,Benzene,Phenol,Ether,Aldehyde, name is 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, and the molecular formula is C13H17BrO3, Safety of 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde.

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