Month: November 2022

Kim, Yong Ryun published the artcileConjugated polyelectrolytes for stable perovskite solar cells based on methylammonium lead triiodide, Name: 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2022), 10(7), 3321-3329, database is CAplus.

Despite the outstanding role of conjugated polyelectrolytes in organic solar cells, the use of conjugated polyelectrolytes in perovskite solar cells (PSCs) has rarely been reported due to instability issues of the material itself under operating conditions. Herein, an efficient and stable inverted perovskite solar cell (p-i-n) was fabricated by introducing an amine-containing carbazole-based conjugated polyelectrolyte (CzNBr) with a simple and room temperature solution process as a cathode buffer layer (CBL) at the underlying layer of a metal electrode in PSCs. Promisingly, this approach allows not only modification of the work function of the metal electrode, yielding improved charge extraction properties, but also detainment of the migrating ionic defects of the perovskite layer induced by the metal electrode, resulting in robust stable PSCs. Ultimately, it exhibits a significant enhancement of both the efficiency (20.28%) and stability of PSCs based on methylammonium lead triiodide (MAPbI₃); nonencapsulated PSCs maintained 80% of their initial efficiency (T₈₀) under continuous heating at 85 °C for 1000 h and 50 cycles of thermal cycling tests (from -25 to 85 °C). The excellent charge extraction and detainment of ionic defects with the CzNBr layer enable the demonstration of highly stable and efficient PSCs to prove the huge potential of this new type of CBL in applications. Furthermore, our results open up new possibilities for CPEs in PSCs in terms of their performance to demonstrate easily processed highly efficient and stable PSCs.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 1268162-40-8. 1268162-40-8 belongs to dioxole, auxiliary class Boronic acid and ester,Boronic acid and ester,Bromide, name is 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole, and the molecular formula is C30H42B2BrNO4, Name: 9-(6-Bromohexyl)-2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Shen, Guoli published the artcilePd/Zn Co-catalyzed Asymmetric Ring-opening Reactions of Aza/Oxabicyclic Alkenes with Oximes, Computed Properties of 503538-69-0, the publication is Asian Journal of Organic Chemistry (2019), 8(1), 97-102, database is CAplus.

An application of various oximes as nucleophiles in the asym. ring-opening (ARO) reaction of aza/oxabicyclic alkenes resulting in cis-ARO products has been developed. The reaction was co-catalyzed by Pd(OAc)₂ and Zn(OTf)₂ with (R)-DIFLUORPHOS as the chiral ligand. This methodol. exhibits broad substrate scope, functional group tolerance with high enantioselectivity. A synthetic application of this method has been demonstrated.

Asian Journal of Organic Chemistry published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C6H10N2, Computed Properties of 503538-69-0.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Lucciola, Daniela published the artcileFurther developments of an enantioselective palladium-catalyzed polyene cyclization: surprising solvent and ligand effects, Recommanded Product: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, the publication is Synlett (2011), 1618-1622, database is CAplus.

The enantioselectivity of a Pd-catalyzed domino Heck-Mizoroki cyclization is dramatically enhanced by ligand and solvent choice. Electron-deficient ligands such as (R)-DIFLUORPHOS gave I in %ee values ranging from 94% ee to >99% ee. EtOH was found to be superior to other solvents traditionally used in Heck-Mizoroki reactions, generally showing increases in enantioselectivity when compared to toluene. It is also shown that microwave heating accelerates the reaction in either solvent and allows for a longer catalyst lifetime without eroding the %ee.

Synlett published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Recommanded Product: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Horio, T. published the artcileA potent attractant of zoospores of Aphanomyces cochlioides isolated from its host, Spinacia oleracea, HPLC of Formula: 110204-45-0, the publication is Experientia (1992), 48(4), 410-14, database is CAplus.

A highly potent attractant of zoospores of A. cochlioides, a causal fungus of the root rot disease of spinach (S. oleracea), was isolated from spinach roots, and its structure was determined by spectroscopic evidence and chem. synthesis as cochliophilin A (5-hydroxy-6,7-methylenedioxyflavone, I). A chromosorb particle prepared by soaking in I solution showed a potent attracting activity toward the zoospores using concentrations of I above 10^-9 or 10^-10 M.

Experientia published new progress about 110204-45-0. 110204-45-0 belongs to dioxole, auxiliary class Flavonoids, name is 9-Hydroxy-6-phenyl-8H-[1,3]dioxolo[4,5-g]chromen-8-one, and the molecular formula is C16H10O5, HPLC of Formula: 110204-45-0.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Salomaa, Pentti published the artcileHydrolysis of 1,3-dioxolane and its alkyl-substituted derivatives. I. Structural factors influencing the rates of hydrolysis of a series of methyl-substituted dioxolanes, Safety of 2,2,4-Trimethyl-1,3-dioxolane, the publication is Acta Chemica Scandinavica (1961), 871-8, database is CAplus.

The exptl. techniques for the rate studies were dilatometric, for dioxolane derivatives which carried one or two Me groups at the 2-position, and titrimetric, for those derivatives that did not carry substituents at the 2-position. Based on the magnitude of the activation entropies, it was probable that the dioxolanes hydrolyzed by essentially the same mechanism as acyclic acetals. The introduction of a methyl group at the 2-position increased the rate of hydrolysis of dioxolanes by a factor of 10³-10⁴, primarily due to low activation energies. A second Me group at the 2-position increased the rate by another power of 10. The addition of one or more Me groups as substituents at the 4- and 5-position had a more complex influence on the rate of hydrolysis, most likely because of interaction of steric strain and polar effects. The polar factors involved were similar to those observed in acyclic acetals. The steric strain considerations which involved the partial 2,3-double bond after proton uptake at the 1-position also permitted distinguishing between cis- and trans-2,4-dimethyl-1,3-dioxolane, the cis form hydrolyzing about 4 times faster than the trans form.

Acta Chemica Scandinavica published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Safety of 2,2,4-Trimethyl-1,3-dioxolane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Maruyama, Kazuya published the artcileAlternating Cationic Copolymerization of Vinyl Ethers and Aryl-Substituted Cyclic Acetals: Structural Investigation of Effects of Cyclic Acetals on Copolymerizability, Application In Synthesis of 177-10-6, the publication is Macromolecules (Washington, DC, United States) (2022), 55(10), 4034-4045, database is CAplus.

The effects of the structural difference of cyclic acetals were investigated in the cationic copolymerization with vinyl monomers via the concurrent vinyl-addition and ring-opening mechanisms. A series of alkyl- and aryl-substituted cyclic acetals were successfully copolymerized with 2-chloroethyl vinyl ether (CEVE) under appropriate conditions. In particular, copolymerization of an aryl-substituted 2-(4-methoxyphenyl)-1,3-dioxolane (PMPDOL) with CEVE involved exclusive crossover reactions between PMPDOL and CEVE, resulting in alternating copolymers. Copolymerization of PMPDOL and other vinyl ethers and styrene derivatives also proceeded via the frequent crossover reactions, while the copolymerization of 2-methyl-1,3-dioxolane, a methyl-substituted counterpart of PMPDOL, with vinyl monomers except for CEVE proceeded negligibly. The difference in the substituents of cyclic acetals significantly affected the electronic and steric environments around the carbocation generated in the propagation reaction, which is related to the frequency of the crossover reaction. Acid hydrolysis of alternating copolymers resulted in complete degradation and selective generation of a single compound due to the periodic incorporation of acetal structures in the main chains, which supported the well-defined structure of copolymers. The monomer reactivity ratios were also consistent with the copolymerizability difference between the aryl- and alkyl-substituted cyclic acetals. The structure-polymerizability relationship of cyclic acetals in the copolymerization was discussed based on the reaction mechanism during the propagating reaction.

Macromolecules (Washington, DC, United States) published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, Application In Synthesis of 177-10-6.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Maruyama, Kazuya published the artcileAlternating Cationic Copolymerization of Vinyl Ethers and Aryl-Substituted Cyclic Acetals: Structural Investigation of Effects of Cyclic Acetals on Copolymerizability, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane, the publication is Macromolecules (Washington, DC, United States) (2022), 55(10), 4034-4045, database is CAplus.

The effects of the structural difference of cyclic acetals were investigated in the cationic copolymerization with vinyl monomers via the concurrent vinyl-addition and ring-opening mechanisms. A series of alkyl- and aryl-substituted cyclic acetals were successfully copolymerized with 2-chloroethyl vinyl ether (CEVE) under appropriate conditions. In particular, copolymerization of an aryl-substituted 2-(4-methoxyphenyl)-1,3-dioxolane (PMPDOL) with CEVE involved exclusive crossover reactions between PMPDOL and CEVE, resulting in alternating copolymers. Copolymerization of PMPDOL and other vinyl ethers and styrene derivatives also proceeded via the frequent crossover reactions, while the copolymerization of 2-methyl-1,3-dioxolane, a methyl-substituted counterpart of PMPDOL, with vinyl monomers except for CEVE proceeded negligibly. The difference in the substituents of cyclic acetals significantly affected the electronic and steric environments around the carbocation generated in the propagation reaction, which is related to the frequency of the crossover reaction. Acid hydrolysis of alternating copolymers resulted in complete degradation and selective generation of a single compound due to the periodic incorporation of acetal structures in the main chains, which supported the well-defined structure of copolymers. The monomer reactivity ratios were also consistent with the copolymerizability difference between the aryl- and alkyl-substituted cyclic acetals. The structure-polymerizability relationship of cyclic acetals in the copolymerization was discussed based on the reaction mechanism during the propagating reaction.

Macromolecules (Washington, DC, United States) published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Recommanded Product: 2,2,4-Trimethyl-1,3-dioxolane.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Yin, Liang published the artcileA Facile Pathway to Enantiomerically Enriched 3-Hydroxy-2-Oxindoles: Asymmetric Intramolecular Arylation of α-Keto Amides Catalyzed by a Palladium-DifluorPhos Complex, Recommanded Product: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, the publication is Angewandte Chemie, International Edition (2011), 50(33), 7620-7623, S7620/1-S7620/90, database is CAplus and MEDLINE.

The first catalytic, enantioselective intramol. aryl-transfer reaction of aryl triflates to ketones has been developed, providing 3-hydroxy-2-oxindoles, e.g., I, from α-keto amides, e.g., II, in 82-99% ee. Initial extension of the methodol. to the synthesis of 4-hydroxydihydroquinolin-2-ones is also explored. This method features overall practicality, including substrate stability and accessibility (protecting-group free) plus no need for the use of stoichiometric amounts of metals.

Angewandte Chemie, International Edition published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C7H13ClNNaO5S, Recommanded Product: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Kwon, Ki-Dong published the artcileCharacterization of emissions composition for selected household products available in Korea, HPLC of Formula: 1193-11-9, the publication is Journal of Hazardous Materials (2007), 148(1-2), 192-198, database is CAplus and MEDLINE.

This study examined the emission composition for 59 household products currently sold in Korea, using a headspace anal. The chem. composition and concentrations of total volatile organic compounds (VOCs) broadly varied along with products, even within the same product category. Up to 1-17 organics were detected in the headspace gas phase of any one of the products. The chem. composition of certain household products determined in the current study was different from that of other studies from other countries. Between 4 and 37 compounds were detected in the headspace gas phase of each product class. Several compounds were identified in >1 product class. Of the 59 household products analyzed, 58 emitted ≥1 of the 72 compounds at chromatog. peak areas above 10⁴. There were 11 analytes which occurred with a frequency of >10%: Limonene (44.2%), ethanol (30.5%), acetone (18.6%), α-pinene (18.6%), o,m,p-xylenes (18.6%), decane (17.0%), toluene (17.0%), β-myrcene (11.9%), ammonia (10.2%), ethylbenzene (10.2%), and hexane (10.2%).

Journal of Hazardous Materials published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, HPLC of Formula: 1193-11-9.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem

Jadhav, Sumit V. published the artcileNanosized sulfated zinc ferrite as catalyst for the synthesis of nopol and other fine chemicals, SDS of cas: 177-10-6, the publication is Catalysis Today (2012), 198(1), 98-105, database is CAplus.

A nanosized highly ordered mesoporous zinc ferrite (ZnFe₂O₄; ZF) was synthesized via co-precipitation method, further sulfated with ammonium sulfate solution to obtain sulfated ZF (SZF) and have been used for the synthesis of nopol by Prins condensation of β-pinene and paraformaldehyde. The NH₃-TPD and pyridine sorption DRIFT-IR studies revealed the significant enhancement in Lewis acidic sites of the zinc ferrite on sulfatation. The influence of various reaction parameters such as reaction temperature, effect of substrate stoichiometry and catalyst loading has been investigated. It gave 70% conversion of β-pinene with 88% selectivity to nopol. The spent catalyst was regenerated and reused successfully up to four cycles with slight loss in catalytic activity. The nanosized SZF catalyst was found to be highly active towards several other com. important acid catalyzed reactions such as isomerization, acetalization and aldol condensation.

Catalysis Today published new progress about 177-10-6. 177-10-6 belongs to dioxole, auxiliary class Dioxolane,Spiro, name is 1,4-Dioxaspiro[4.5]decane, and the molecular formula is C8H14O2, SDS of cas: 177-10-6.

Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem