Month: November 2022

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

Liu, Xuan-Yu published the artcileIron(0)-Mediated Reformatsky Reaction for the Synthesis of β-Hydroxyl Carbonyl Compounds, HPLC of Formula: 401-55-8, the publication is Organic Letters (2019), 21(15), 5873-5878, database is CAplus and MEDLINE.

An efficient, economical, and practical Reformatskii reaction of α-halo carbonyl compounds with aldehydes/ketones by using cheap and com. iron(0) powder as reaction mediator is developed. The reactions proceeded effectively in the presence of a catalytic amount of iodine (20 mol %) to afford the synthetically useful β-hydroxyl carbonyl compounds in moderate to good yields.

Organic Letters published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C4H6BrFO2, HPLC of Formula: 401-55-8.

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

Zhang, Zhong published the artcileVisible-Light-Promoted Oxy-Difluoroalkylation Of Aryl Alkynes For The Synthesis Of β-Fluoroenones And α-Difluoroalkyl Ketones, Synthetic Route of 401-55-8, the publication is Advanced Synthesis & Catalysis (2021), 363(13), 3348-3353, database is CAplus.

A method for regio-, stereoselective synthesis of (E)-β-fluoroenones I [R = H, Et, nPr; R¹ = CO₂Et, C(O)NEt₂, P(O)(OEt)₂, pyrrolidin-1-yl; Ar = Ph, 4-MeC₆H₄, 4-BrC₆H₄, etc.] was synthesized via visible light irradiated oxy-difluoroalkylation of alkynes using di-fluoroacetates and water as oxygen source, potassium carbonate as base. Also, α-difluoroalkyl ketones II [Ar¹ = Ph, 2-thienyl, 4-ClC₆H₄, etc.; R² = Me, Et, nPr, etc.] were obtained using phenylpyridine as base under same reaction conditions. These transformations featured mild condition, wide functional tolerance and step economy. The large-scale transformations and further derivatization showed its potential application in organic synthesis.

Advanced Synthesis & Catalysis published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is 0, Synthetic Route of 401-55-8.

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

Zhang, Pengbo published the artcileCopper and Photocatalytic Radical Relay Enabling Fluoroalkylphosphorothiolation of Alkenes: Modular Synthesis of Fluorine-Containing S-Alkyl Phosphorothioates and Phosphorodithioates, COA of Formula: C4H6BrFO2, the publication is Organic Letters (2021), 23(23), 9267-9272, database is CAplus and MEDLINE.

A photoredox and copper-catalyzed fluoroalkylphosphorothiolation of activated and unactivated alkenes via a radical relay mechanism is reported. By employing fluoroalkyl halides as radical precursors and P(O)SH or P(S)SH compounds as coupling partners, a wide range of β-monofluoroalkyl-, -difluoroalkyl-, -trifluoromethyl-, or -perfluoroalkyl-substituted S-alkyl phosphorothioates and phosphorodithioates can be easily constructed under mild conditions with good functional group tolerance. Furthermore, this modular reaction system can be successfully applied to late-stage functionalization of bioactive mols.

Organic Letters published new progress about 401-55-8. 401-55-8 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Aliphatic hydrocarbon chain,Ester, name is Ethylbromofluoroacetate, and the molecular formula is C8H5F3O2S, COA of Formula: C4H6BrFO2.

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

Lu, Wenqing published the artcileIridium(I)-catalyzed deoxgenation of fluoroalkylsulfoxides with dimethyl diazomalonate to access fluoroalkylthioethers, Formula: C8H6BrF3S, the publication is Chinese Chemical Letters (2022), 33(11), 4865-4869, database is CAplus.

A new method for the preparation of trifluoromethylthioethers RSCF₃ [R = Ph, 4-BrC₆H₄, 4-MeOC₆H₄, etc.]/difluoromethylthioethers RCF₂H [R = 4-O₂NC₆H₄, 4-BrC₆H₄, 3-ClC₆H₄, etc.] via iridium(I)-catalyzed deoxgenation of fluoroalkylsulfoxides with di-Me diazomalonate was developed. In the reaction system, di-Me diazomalonate was used as reducing reagent and the corresponding fluoroalkylthioethers were produced through oxygen atom transfer from fluoroalkylsulfoxides to diazomalonate. The protocol featuring effective oxygen atom transfer, mild reaction conditions and good functional groups tolerance offered an alternative strategy for the synthesis of fluoroalkylthioethers.

Chinese Chemical Letters published new progress about 21101-63-3. 21101-63-3 belongs to bromides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Bromide,sulfides,Benzyl bromide,Benzene, name is (4-(Bromomethyl)phenyl)(trifluoromethyl)sulfane, and the molecular formula is C8H6BrF3S, Formula: C8H6BrF3S.

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

Cao, Xiang-Jian published the artcileControlling the Balance of Photoluminescence and Photothermal Effect in Cyanostilbene-Based Luminescent Liquid Crystals, Quality Control of 143-15-7, the publication is Chinese Journal of Chemistry (2022), 40(8), 902-910, database is CAplus.

Mol. motions of the luminescent liquid crystals (LLCs) show a significant effect on fluorescent emission and heat generation. In this article, a series of cyanostilbene-based LLCs (CSs: CS1-6, CS1-12, CS2-6 and CS2-12) are synthesized to investigate how the photoluminescence and photothermal effect balanced. Among these materials, the mesogens peripheried by single alkyl chains formed enantiotropic nematic (CS1-6) or smectic C (CS1-12) phase with different alkyl tail lengths. When the single aliphatic chain is replaced by mini-dendrons, room temperature (RT) monotropic hexagonal columnar phase (CS2-12) or mol. liquid (CS2-6) is formed. The results revealed that all these materials exhibited high efficiency emission with the highest quantum yield reaching 59.0%. The photoluminescence and photothermal effect can be effectively tuned by dispersing CSs into a com. available RT liquid crystal matrix 8CB, which output significantly improved photothermal conversion efficiency of 63.2%. Furthermore, the photothermal can rapidly trigger the Smectic A-Nematic-Isotropic sequence transitions of 8CB doped with CSs. This work paves a way of adjusting the balance of photoluminescence and photothermal properties of the LLC materials.

Chinese Journal of Chemistry published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C12H25Br, Quality Control of 143-15-7.

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

Zheng, Hongzhi published the artcileUncovering the Circular Polarization Potential of Chiral Photonic Cellulose Films for Photonic Applications, Recommanded Product: 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde, the publication is Advanced Materials (Weinheim, Germany) (2018), 30(13), n/a, database is CAplus and MEDLINE.

Circularly polarized light (CPL) is central to photonic technols. A key challenge lies in developing a general route for generation of CPL with tailored chiroptical activity using low-cost raw materials suitable for scale-up. This study presents that cellulose films with photonic band gaps (PBG) and left-handed helical sense have an intrinsic ability for circular polarization leading to PBG-based CPL with extraordinary |g| values, well-defined handedness, and tailorable wavelength by the PBG change. Using such cellulose films, incident light ranging from near-UV to near-IR can be transformed to passive L-CPL and R-CPL with viewing-side-dependent handedness and |g| ≤ 0.87, and spontaneous emission transformed to R-CPL emission with |g| values up to 0.68. Unprecedented evidence is presented with theor. underpinning that the PBG effect can stimulate the R-CPL emission. The potential of cellulose-based CPL films for polarization-based encryption is illustrated. The evaporation-induced self-assembly coupled with nanoscale mesogens of cellulose nanocrystals opens new venues for technol. advances and enables a versatile strategy for rational design and scalable manufacturing of organic and inorganic CPL films for photonic applications.

Advanced Materials (Weinheim, Germany) 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 C12H14BNO2, Recommanded Product: 4-((6-Bromohexyl)oxy)-2-hydroxybenzaldehyde.

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

Zhuang, Zhuoxin published the artcileMelt and nucleation reinforcement for stereocomplex crystallites in poly(L-lactide)/lignin-grafted-poly(D-lactide) blend, Recommanded Product: 1-Bromododecane, the publication is European Polymer Journal (2022), 111072, database is CAplus.

Lignin-grafted-poly(D-lactide) (LGPD) with two different poly(D-lactide) (PDLA) block lengths (1100 and 2000 Da), denoted as LGPD_L and LGPD_H resp., were synthesized by ring opening polymerization using dodecylated lignin as initiator. They were then blended with poly(L-lactide) (PLLA) to improve its crystallization, mech. properties and UV-absorbance properties. It was found that stereocomplex (SC) crystallites could be formed in both PLLA/LGPD blends, and the crystallization rate of PLLA/LGPD_H was faster than that of PLLA/LGPD_L because of the longer PDLA block length. Both in the non-isothermal and isothermal crystallization process, the crystallization of PLLA in the PLLA/LGPD_H blend was the fastest when the ratio of LGPD_H was 3%. SC crystallites in the PLLA/LGPD_H blends also showed broader melting ranges and higher final melting temperatures comparing to the blends of PLLA and 4-armed PDLA (4a-PDLA), whose number of PDLA arms and mol. weight was similar to LGPD_H. These results proved that the lignin structure grafted by the PDLA arms could affect the state of SC crystallites and their acceleration effect on the crystallization of PLLA in the blend. The degradation behavior showed that the degradation rate of the LGPD_H-5% blend in the final stage of degradation (about 24 h) was the slowest comparing to other blends. Besides, the PLLA/LGPD blends had better tensile strength and UV-absorbance properties than neat PLLA.

European Polymer Journal published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C3H6O2, Recommanded Product: 1-Bromododecane.

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

Song, Shizhu published the artcileImidazolium ionic Liquid-Regulated Sub-5-nm Pt(1 1 1) with a stable configuration anchored on hollow carbon nanoshells for efficient oxygen reduction, Name: 1-Bromododecane, the publication is Journal of Colloid and Interface Science (2022), 606(Part_1), 177-191, database is CAplus and MEDLINE.

Here, N-doped hollow carbon sphere (NHCS)-supported (1 1 1)-plane-engineered sub-5-nm Pt (Pt-NHCS) catalysts regulated precisely by imidazolium ionic liquids were synthesized successfully and used to catalyze oxygen reduction The (1 1 1)-plane engineered Pt nanocrystals with a diameter of 4.5 ± 0.5 nm were homogeneously deposited on the 3-dimensional spherical nanoshells. The resulting Pt nanocrystals anchored on the carbon skeleton exhibit a stable configuration in both alk. and acid electrolytes with the help of imidazolium cations and pyrolysis. Among all as-prepared catalysts, the optimized Pt-NHCS shows remarkable long-term durability. Specifically, Pt-NHCS maintains 95.3% of the original c.d. after 10,000 potential cycles, while Pt/C benchmarks exhibit a retention of 78.5%. Accelerated durability test results indicate that Pt-NHCS exhibits a high efficiency of 96% in comparison with initial c.d., while a value of 86% for Pt/C. D. functional theory calculations demonstrate that reactive Pt(1 1 1) planes with well-defined Schottky defects and vacancies adsorb and activate oxygen mol. rapidly while desorbing the reaction intermediates.

Journal of Colloid and Interface Science published new progress about 143-15-7. 143-15-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromododecane, and the molecular formula is C19H14O2, Name: 1-Bromododecane.

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