Tag: M.W=300-350

Liang, Hua published the artcileOrtho-hydroxyl-oriented tandem-responsive diacylhydrazones with super sensitivity for Al³⁺ and subsequent potential recognition of Cu²⁺, SDS of cas: 1207448-58-5, the publication is Sensors and Actuators, B: Chemical (2018), 62-69, database is CAplus.

Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al³⁺ detection were investigated. Except 2d, all the other compounds exhibit notable turn-on fluorescence toward Al³⁺ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho-OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al³⁺ systems show selective fluorescence turn-off for Cu²⁺, providing a potential platform for tandem recognition of Al³⁺ and Cu²⁺. 2a as a standard, shows a 1:2 molar ratio to Al³⁺ confirmed by Job′s plot, ¹H NMR spectra and mass spectra, and its detection limit for Al³⁺ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al³⁺ detection, anion selectivity was also explored and it shows that 2a, 2b and 2c all have selectivity toward CN^– evidenced by UV-vis spectra.

Sensors and Actuators, B: Chemical 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, SDS of cas: 1207448-58-5.

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

Li, Zeqing published the artcileMicrowave-assisted, Ir-catalyzed aromatic C-H borylation, Category: bromides-buliding-blocks, the publication is Research on Chemical Intermediates (2013), 39(4), 1917-1926, database is CAplus.

One-step conversions of 1,3-disubstituted benzenes to aryl boronates and 2,6-disubstituted pyridines to heteroaryl boronates are described. Microwave heating was used for all reactions. [(COD)Ir(μ-OMe)]₂ and 4,4′-di-tert-butyl-2,2′-bipyridine were used as catalysts, in Me tert-Bu ether. Acceleration of the rate of reaction was remarkable compared with that of same reaction under conventional heating conditions.

Research on Chemical Intermediates 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, Category: bromides-buliding-blocks.

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

Li, Yan published the artcileLigand-Controlled Cobalt-Catalyzed Regiodivergent Alkyne Hydroalkylation, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of the American Chemical Society (2022), 144(30), 13961-13972, database is CAplus and MEDLINE.

Herein, a ligand-controlled cobalt-catalyzed regiodivergent alkyne hydroalkylation was reported. The sensible selection of bisoxazoline and pyridine-oxazoline ligands led to reliable and predictable protocols that provided (E)-1,2-disubstituted and 1,1-disubstituted alkenes with high E/Z stereoselectivity and regioisomeric ratio starting from identical terminal alkyne and alkyl halide substrates and produced trisubstituted alkenes in the case of internal alkynes. This method exhibited a broad scope for terminal and internal alkynes with a wide range of activated and unactivated alkyl halides and shows excellent functional group compatibility.

Journal of the American Chemical Society published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

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

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

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

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

Li, Qing published the artcileSolution-processible Thieno-[3,4-b]-pyrazine Derivatives with Large Stokes Shifts for Non-doped Red Light-emitting Diodes, Product Details of C4Br2N2O4S, the publication is Macromolecular Rapid Communications (2011), 32(9-10), 736-743, database is CAplus and MEDLINE.

A group of novel thieno-[3,4-b]-pyrazine-cored mols. containing polyphenyl dendrons with or without arylamino or carbazolyl surface groups (DTP, N-DTP and C-DTP) are synthesized and investigated. They are characterized by extra large Stokes shifts of over 250 nm. In addition, to provide the site-isolation effect on the planar emissive core, the bulky dendrons enable these mols. to be solution processible. The peripheral carbazolyl or arylamino units facilitate the hole transporting ability in the neat films of these mols. These dendritic materials are used as a non-doped emitting layer to fabricate organic light-emitting diodes (OLEDs) using a spin coating technique and saturated red emission is obtained. The dendritic mols. with arylamino or carbazolyl surface groups (N-DTP and C-DTP) exhibit a brightness of 1020 cd m^-2 and a luminous efficiency of 0.6 cd A^-1, both higher than the dendritic analog without the surface functional groups (DTP), even superior to the small mol. reference compound which fails to transmit pure red emission under identical conditions. This performance is also comparable with that from vacuum deposited thieno-[3,4-b]-pyrazine-based counterparts and that for some other solution processible red fluorescent dendrimers. This is the first example of solution processible thieno-[3,4-b]-pyrazine derivatives for OLED applications.

Macromolecular Rapid Communications 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, Product Details of C4Br2N2O4S.

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

Li, Qing published the artcileNovel red-emitting thieno-[3,4-b]-pyrazine derivatives suitable for vacuum evaporation and solution method to fabricate non-doped OLEDs, Related Products of bromides-buliding-blocks, the publication is Dyes and Pigments (2012), 92(1), 674-680, database is CAplus.

Two novel red-emitting thieno-[3,4-b]-pyrazine-cored mols. with phenyls (TP) or polyphenyls (Muellen type dendron, DTP) as peripheral groups were designed and synthesized. They have large Stokes shifts over 100 nm. DTP is thermally stable with decomposition temperature up to 458°C. More importantly, it is amorphous with a remarkably high glass transition temperature of 262°C. DTP can be made into thin films either by solution method or vacuum evaporation Red OLEDs were fabricated using either spin coated or vacuum evaporated DTP film as emitting layer. The evaporated device exhibited a maximum brightness of 1753 cd m^-2 and a luminous efficiency of 0.74 cd A^-1, which are among the best data ever reported for thieno-[3,4-b]-pyrazine derivatives so far. In contrast, TP failed to produce satisfactory red emission in its evaporated OLEDs.

Dyes and Pigments 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

Li, Qing published the artcileSynthesis and characterization of thieno[3,4-b]pyrazine materials for solution-processible organic red light-emitting diodes, Product Details of C4Br2N2O4S, the publication is Chemistry Letters (2011), 40(4), 417-419, database is CAplus.

Two novel thieno[3,4-b]pyrazine-cored mols., P-DTP and TP-DTP, are synthesized and are characterized by extra large Stokes shifts of over 300 nm. The bulky polyaromatic arms enable these mols. to be solution processible and provide site-isolation on the planar emissive core. They exhibit saturated red electroluminescence in non-oped organic light-emitting diodes fabricated by spin coating.

Chemistry Letters 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, Product Details of C4Br2N2O4S.

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