Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

Journal of Materials Chemistry C, Год журнала: 2024, Номер 12(28), С. 10330 - 10389

Опубликована: Янв. 1, 2024

Different applications of semiconductor quantum dots with their unique fundamental properties.

Язык: Английский

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Cross-Electrophile Coupling: Principles, Methods, and Applications in Synthesis

Chemical Reviews, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 26, 2024

Cross-electrophile coupling (XEC), defined by us as the cross-coupling of two different σ-electrophiles that is driven catalyst reduction, has seen rapid progression in recent years. As such, this review aims to summarize field from its beginnings up until mid-2023 and provide comprehensive coverage on synthetic methods current state mechanistic understanding. Chapters are split type bond formed, which include C(sp

Язык: Английский

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Electrochemical NiH‐Catalyzed C(sp³)−C(sp³) Coupling of Alkyl Halides and Alkyl Alkenes

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(44)

Опубликована: Сен. 14, 2023

Herein, an electrochemically driven NiH-catalyzed reductive coupling of alkyl halides and alkenes for the construction Csp3 -Csp3 bonds is firstly reported. Notably, serve dual function as substrates hydrogen sources to generate NiH species under electrochemical conditions. The tunable nature this reaction realized by introducing intramolecular coordinating group substrate, where product can be easily adjusted give desired branched products. method proceeds mild conditions, exhibits a broad substrate scope, affords moderate excellent yields with over 70 examples, including late-stage modification natural products drug derivatives. Mechanistic insights offer evidence process. sp3 -carbon-halogen activated through single electron transfer (SET) nickel catalyst in its low valence state, generated cathodic reduction, generation from pivotal transformation.

Язык: Английский

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Interfacial Charge Transfer Regulates Photoredox Catalysis

ACS Central Science, Год журнала: 2024, Номер 10(3), С. 529 - 542

Опубликована: Фев. 26, 2024

Photoredox catalytic processes offer the potential for precise chemical reactions using light and materials. The central determinant is identified as interfacial charge transfer, which simultaneously engenders distinctive behavior in overall reaction. An in-depth elucidation of main mechanism highlighting complexity transfer can occur through both diffusive direct models, revealing its sophisticated design complex transformations. fundamental photophysics uncover these comprehensive applications a clue future development. This research contributes to growing body knowledge on photoredox catalysis sets stage further exploration this fascinating area research.

Язык: Английский

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Dual nickel- and photoredox-catalyzed carbon-carbon bond formations via reductive cross-coupling involving organohalides

Chem Catalysis, Год журнала: 2024, Номер 4(3), С. 100952 - 100952

Опубликована: Март 1, 2024

Язык: Английский

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Chromium‐Catalyzed Reductive Cross‐Coupling to Construct C−SS Bonds from Unactivated Alkyl Electrophiles

ChemCatChem, Год журнала: 2024, Номер 16(15)

Опубликована: Март 15, 2024

Abstract Low‐valent chromium catalysts are cheap and less toxic compared to other transition metal catalysts. Here in, we reported a ligand‐free chromium(III)‐catalyzed manganese reductive cross‐coupling of unactivated alkyl electrophiles, such as sulfonates chlorides, with trisulfide dioxides thiolation agents form carbon−sulfur bonds. The powerful method featured ample substrate scope wide functional group tolerance, constructing large number unsymmetrical disulfides under simple conditions.

Язык: Английский

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Ni-catalyzed enantioconvergent deoxygenative reductive cross-coupling of unactivated alkyl alcohols and aryl bromides

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 28, 2024

Abstract Transition metal-catalyzed enantioconvergent cross-coupling of an alkyl precursor presents a promising method for producing enantioenriched C(sp 3 ) molecules. Because alcohol is ubiquitous and abundant family feedstock in nature, the direct reductive coupling aryl halide enables efficient access to valuable compounds. Although several strategies have been developed overcome high bond dissociation energy C − O bond, asymmetric pattern remains unknown. In this report, we describe realization deoxygenative unactivated (β-hydroxy ketone) bromide presence NHC activating agent. The approach can accommodate substituents various sizes functional groups, its synthetic potency demonstrated through gram scale reaction derivatizations into other compound families. Finally, apply our convergent synthesis four β-aryl ketones that are natural products or bioactive

Язык: Английский

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Inorganic–Organic Dual-Ligand-Regulated Photocatalysis of CdS@Zn_xCd_1–xS@ZnS Quantum Dots for Lignin Valorization

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(10), С. 12624 - 12636

Опубликована: Фев. 29, 2024

In a dual-functional lignin valorization system, harmonious oxidation and reduction rate is prerequisite for high photocatalytic performance. Herein, an efficient facile ligand manipulating strategy to balance the redox reaction process exploited via decorating surface of CdS@Zn

Язык: Английский

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Visible-light-mediated Diels–Alder reactions under single-chain polymer confinement: investigating the role of the crosslinking moiety on catalyst activity

Polymer Chemistry, Год журнала: 2024, Номер 15(18), С. 1833 - 1838

Опубликована: Янв. 1, 2024

Single-chain polymer nanoparticle photoredox catalysts are designed wherein spatial proximity enables the crosslinking acene to act as a redox mediator, thus achieving up 30-fold enhancement of catalyst activity in model Diels–Alder reaction.

Язык: Английский

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Multiphoton‐driven Photocatalytic Defluorination of Persistent Perfluoroalkyl Substances and Polymers by Visible Light

Angewandte Chemie, Год журнала: 2024, Номер 136(42)

Опубликована: Июнь 19, 2024

Abstract Perfluoroalkyl substances (PFASs) and fluorinated polymers (FPs) have been extensively utilized in various industries, whereas their extremely high stability poses environmental persistence difficulty waste treatment. Current decomposition approaches of PFASs FPs typically require harsh conditions such as heating over 400 °C. Thus, there is a pressing need to develop new technique capable decomposing them under mild conditions. Here, we demonstrated that perfluorooctanesulfonate (PFOS), known “persistent chemical,” Nafion, widely sulfonated FP for ion‐exchange membranes, can be efficiently decomposed into fluorine ions ambient via the irradiation visible LED light onto semiconductor nanocrystals (NCs). PFOS was completely defluorinated within 8‐h 405‐nm light, turnover number C−F bond dissociation per NC 17200. Furthermore, 81 % defluorination Nafion achieved 24‐h irradiation, demonstrating efficient photocatalytic properties light. We revealed this driven by cooperative mechanisms involving light‐induced ligand displacements Auger‐induced electron injections hydrated electrons higher excited states. This study not only demonstrates feasibility breaking down but also paves way advancing toward sustainable fluorine‐recycling society.

Язык: Английский

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