Tag: M.W=200-250

Ahn, Seongmo published the artcileSystematic Designs of Dicationic Heteroarylpyridiniums as Negolytes for Nonaqueous Redox Flow Batteries, Related Products of iodides-buliding-blocks, the publication is ACS Energy Letters (2021), 6(9), 3390-3397, database is CAplus.

Many organic redox materials are chem. unstable and sparingly soluble in nonaqueous media. Addnl., the crossover of redox materials and the availability of limited membranes have restricted the examination of the long-term cyclability of these materials in nonaqueous redox flow batteries (RFBs). To overcome these limitations, we developed a new class of pyridinium-based negolytes. The π-conjugation structure of the pyridinium mols. was extended by introducing benzothiazole into the C4-position of pyridinium, which improved the stability of these mols. Cationic ammonium functional groups at the N-substituent suppressed the crossover of the pyridinium negolytes through an anion exchange membrane. Furthermore, the solubility of the negolyte was increased up to ~1 M in acetonitrile and 0.3-0.5 M with tetrabutylammonium bis(trifluoromethanesulfonyl)imide (TBATFSI) and acetonitrile. A 0.1 M solution of the dicationic benzothiazolylpyridinium exhibited 0.0083% capacity-fading rate per cycle in sym. RFBs for 250 cycles and 0.08% in full RFBs comprising the ammonium-substituted ferrocene as a posolyte for 500 cycles.

ACS Energy Letters published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Related Products of iodides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Pande, Gaurav K. published the artcileRGB-to-black multicolor electrochromic devices enabled with viologen functionalized polyhedral oligomeric silsesquioxanes, Product Details of C6H13I, the publication is Chemical Engineering Journal (Amsterdam, Netherlands) (2021), 420(Part_3), 130446, database is CAplus.

Here we demonstrate multicolor electrochromic transitions of viologen functionalized polyhedral oligomeric silsesquioxanes (POSS-viologens). Highly efficient RGB coverage, including black, was successfully achieved with POSS-viologen employed multi-stacked electrochromic devices (ECDs). We prepared octa-viologen functionalized POSS (OHV-POSS) with the insertion of thiophene (OTxHV-POSS) and Ph (OPhHV-POSS) moiety. The single-layer ion gel ECDs exhibited outstanding electrochromic performances. OTxHV-POSS and OHV-POSS showed red (R) and blue (B) transitions, resp., with high transmittance changes and superb coloration efficiency. Saturated green (G) was also obtained from the mixture of OPhHV-POSS and OHV-POSS. Furthermore, multi-stacked ECDs were implemented by combining the RGB coloration layers with multiple electrodes. The two-layer ECDs generated intermediate colors, which was fully translated into the color mixing theory. The three-layer device created real black with blackness L^* of 6.99, covering 12.9% of the NTSC color gamut. The unprecedented RGB-to-black multicolor coverage, not reported elsewhere, is attributable to the reversible color-switching at a low redox potential for extended cyclic operations. Current findings imply that carefully designed POSS-viologens offer a universal route to high-performance and stable multicolor ECDs, offering compatibility with various pixelized color-changing displays and smart windows.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Product Details of C6H13I.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Roychowdhury, Pritam published the artcileTraceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates, Synthetic Route of 638-45-9, the publication is Angewandte Chemie, International Edition (2022), 61(28), e202200665, database is CAplus and MEDLINE.

Here, traceless nitrogen activation for C-H amination-which enables application of selective C-H amination chem. to the preparation of diverse N-functionalized products-via sequential benzylic C-H N-aminopyridylation followed by Ni-catalyzed C-N cross-coupling with aryl boronic acids was introduced. Unlike many C-H amination reactions that provide access to protected amines, the current method installs an easily diversifiable synthetic handle that serves as a lynchpin for C-H amination, deaminative N-N functionalization sequences.

Angewandte Chemie, International Edition published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Synthetic Route of 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Hammoud, Fatima published the artcileChemical engineering around the 5,12-dihydroindolo[3,2-a]carbazole scaffold: Fine tuning of the optical properties of visible light photoinitiators of polymerization, Quality Control of 638-45-9, the publication is European Polymer Journal (2022), 111218, database is CAplus.

5,12-Dihydroindolo[3,2-a]carbazole is a promising scaffold for the design of visible light photoinitiators of polymerization due to the simultaneous presence of two carbazole moieties that can be differently functionalized. Notably, red shift of the absorption spectra can be facilely obtained by nitration of one of the two carbazoles, the second carbazole group being functionalized with various groups. Dinitration of 5,12-dihydroindolo[3,2-a]carbazole is another efficient approach for designing dyes with strong absorptions extending over the visible range. In this work, a series of 36 compounds never reported in the literature and differing by the substitution pattern have been designed and synthesized. Notably, the possibility to design push-pull dyes by Knoevenagel and Claisen Schmidt reactions, to introduce electroactive groups such as thiophene by Suzuki cross-coupling reactions or to design water soluble chromophore has been explored. To evidence the interest of these structures, photopolymerization experiments have been carried out at 405 nm and the polymerization of acrylates has been examined in thick and thin films. To support the polymerization efficiency, mechanisms involved in the free radical polymerization of acrylates have been established by the combination of various techniques including UV-visible absorption and fluorescence spectroscopy, cyclic voltammetry and photolysis experiments

European Polymer Journal published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Quality Control of 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Wynter, Clive I. published the artcileMoessbauer effect of iodine-129 in pyridine complexes of iodine monohalides, Safety of Pyridine Iodochloride complex, the publication is Journal of Chemical Physics (1969), 50(9), 3872-4, database is CAplus.

The values of isomer shift and quadrupole interaction at the 129I nucleus in IBr and ICl complexes with cyclic N bases have been measured. These have been used to estimate σ and π bondings in these complexes. All these complexes exhibit a linear N-I-X (X = Cl, Br) linkage. Although the Br complexes show a systematic dependence of the isomer shift on the basicity of the complexing cyclic amines, no such trend is observed in Cl complexes.

Journal of Chemical Physics published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C6H12F3NO5S, Safety of Pyridine Iodochloride complex.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Yu, Shuling published the artcileSynthesis of Cyclopentenones through Rhodium-Catalyzed C-H Annulation of Acrylic Acids with Formaldehyde and Malonates, Application In Synthesis of 638-45-9, the publication is Organic Letters (2021), 23(13), 5054-5059, database is CAplus and MEDLINE.

An efficient rhodium-catalyzed protocol for the synthesis of cyclopentenones I (R¹ = Et, Bn, c-hexyl, etc.; R² = H, Me, Et, Ph; -R¹R²– = -(CH₂)₃-, -(CH₂)₄-; R³ = Me, Et, n-Pr, i-Pr, n-Bu) based on a three-component reaction of acrylic acids, formaldehyde, and malonates via vinylic C-H activation is reported. Exploratory studies showed that 5-alkylation of as-prepared cyclopentenones could be realized smoothly by the treatment of a variety of alkyl halides with a Na₂CO₃/MeOH solution Excess formaldehyde and malonate led to a multicomponent reaction that afforded the multisubstituted cyclopentenones II (R¹ = n-Bu, 3-FC₆H₄, Ph(CH₂)₂, etc.; R² = H, Me, Et, etc.; R³ = Me, Et, n-Pr, i-Pr; -R¹R²– = -(CH₂)₄-) through a Michael addition

Organic Letters published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C7H10O4, Application In Synthesis of 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Lee, Jin Young published the artcileRadical alkylation of bis(silyloxy)enamine derivatives of organic nitro compounds, Application of Ethyl 2-Iodopropionate, the publication is Angewandte Chemie, International Edition (2006), 45(37), 6182-6186, database is CAplus and MEDLINE.

Alkylation β to a nitro group by radical chem. is made possible by initial conversion of the organic nitro compound into a bis(silyloxy)enamine (TBSOTf = tert-butyldimethylsilyl trifluoromethanesulfonate). E.g., reaction of Me₂CHNO₂ with TBSOTf gave (TBSO)₂NCMe:CH₂. Irradiation of a solution of the latter, ICH₂SO₂Ph, and hexamethylditin gave oxime ether (E)-PhSO₂CH₂CH₂CMe:NOTBS in 71% yield. Hydrolysis of the latter gave ketone PhSO₂CH₂CH₂COMe in 91% yield. An advantage of the method is the simultaneous conversion of the nitro group into a synthetically useful oxime ether group.

Angewandte Chemie, International Edition published new progress about 31253-08-4. 31253-08-4 belongs to iodides-buliding-blocks, auxiliary class Iodide,Ester, name is Ethyl 2-Iodopropionate, and the molecular formula is C5H9IO2, Application of Ethyl 2-Iodopropionate.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Batsanov, Andrei S. published the artcileStereoselective chloro-deboronation reactions induced by substituted pyridine-iodine chloride complexes, Category: iodides-buliding-blocks, the publication is European Journal of Organic Chemistry (2005), 1876-1883, database is CAplus.

A novel class of charge-transfer complexes based on iodine chloride and substituted pyridines, which possess a number of interesting and unique structural features, can be employed to bring about a stereocontrolled chloro-deboronation of vinyl boronates to generate the (Z)-alkenyl chlorides in good yields.

European Journal of Organic Chemistry published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Category: iodides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Person, Willis B. published the artcileInfrared spectra of iodine monochloride charge-transfer complexes, Name: Pyridine Iodochloride complex, the publication is Journal of the American Chemical Society (1958), 2049-53, database is CAplus.

Changes in the infrared spectrum of the ICl stretching vibration as the compound forms complexes of increasing stability are reported. Difficulties arising from the chem. reactivity of ICl were encountered and, to a certain extent, eliminated. The spectrum of this band is very sensitive to the strength of interaction between ICl and the donor mol. with which it is complexed. The frequency decreases regularly from 375 cm.^-1 for the uncomplexed ICl in CCl₄ to 275 cm.^-1 for the strongest complex, pyridine-ICl (I). The intensity of the band increases regularly with increasing strength of the complex, and is 8 times as great for I as for the uncomplexed ICl. The half-intensity width also increases with the strength of the complex. An attempt is made to explain the results in terms of “charge-transfer” theory. The analogy between these exptl. results and the changes in the OH stretching frequency on H-bond formation is discussed.

Journal of the American Chemical Society published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Name: Pyridine Iodochloride complex.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Mateen, Fahad published the artcileLuminescent solar concentrator utilizing energy transfer paired aggregation-induced emissive fluorophores, Computed Properties of 638-45-9, the publication is International Journal of Energy Research (2021), 45(12), 17971-17981, database is CAplus.

Recently, semitransparent luminescent solar concentrators (LSCs) have attracted considerable attention because they offer an easy and cost-effective route to harvest incident light. Various fluorophores including semiconducting quantum dots and organic dyes have been prepared and utilized for LSC fabrication. However, the narrow light absorption range, reabsorption losses, and limited photostability of the fluorophores still hinder the widespread use of LSCs under outdoor and indoor light conditions. Here, we rationally designed an LSC utilizing aggregation-induced emissive fluorophores (AIEgens) and an energy transfer (ET) strategy. We employ diketopyrrolopyrrole with triphenylamine moiety as a highly stable AIEgen that functions as an emissive ET acceptor in LSC; for a donor, we use tetraphenylethene containing triphenylamine moiety that shows good aggregation-induced emission features and excellent spectral overlap with the acceptor to yield an efficient ET process. A thin-film LSC device with an optimized donor:acceptor ratio (1:0.5) was fabricated. Under AM 1.5G solar spectrum, an LSC coupled with three side reflectors and a backside diffuser exhibits 18% optical conversion efficiency and a concentration factor of 1.18. Under indoor white LED illumination, the values were 27% and 1.68%, resp. After exposed to intense UV radiations for 5 h, the LSCs preserved 98% fluorescence which suggests their superior long-term photostability. Our results suggest that the combination of AIEgens and ET holds the potential for enhancing the efficiency of the device and extended stability of the fluorophores, two of the major requirements to allow industrial production and large-scale use of outdoor/indoor light harvesting LSCs.

International Journal of Energy Research published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Computed Properties of 638-45-9.

Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com