The Critical Isomerization Effect of Core Bromination on Nonfullerene Acceptors in Achieving High‐Performance Organic Solar Cells with Low Energy Loss
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DOI: 10.1002/adma.202413376
Abstract: Highly efficient nonfullerene acceptors (NFAs) for organic solar cells (OSCs) with low energy loss (Eloss) and favorable morphology are critical for breaking the efficiency bottleneck and achieving commercial applications of OSCs. In this work, quinoxaline‐based… read more here.
Keywords: core; energy; nonfullerene acceptors; bromination ... See more keywords
Resonant Electron Tunneling Induces Isomerization of π‐Expanded Oligothiophene Macrocycles in a 2D Crystal
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DOI: 10.1002/advs.202200557
Abstract: Macrocyclic oligothiophenes and their π‐expanded derivatives constitute versatile building blocks for the design of (supra)molecularly engineered active interfaces, owing to their structural, chemical, and optoelectronic properties. Here, it is demonstrated how resonant tunneling effect induces… read more here.
Keywords: resonant electron; tunneling induces; isomerization; expanded oligothiophene ... See more keywords
NHC‐Au‐Catalyzed Isomerization of Propargylic B(MIDA)s to Allenes and Double Isomerization of Alkynes to 1,3‐Dienes
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DOI: 10.1002/advs.202308710
Abstract: The synthesis of allenyl boronates is an important yet challenging topic in organic synthesis. Reported herein is an NHC‐gold‐catalyzed 1,3‐H shift toward allenyl boronates synthesis from simple propargylic B(MIDA)s. Mechanistic studies suggest dual roles of… read more here.
Keywords: isomerization propargylic; nhc catalyzed; catalyzed isomerization; mida allenes ... See more keywords
“Inverted” Cyclic(Alkyl)(Amino)Carbene (CAAC) Ruthenium Complex Catalyzed Isomerization Metathesis (ISOMET) of Long Chain Olefins to Propylene at Low Ethylene Pressure
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DOI: 10.1002/advs.202400118
Abstract: Isomerization Metathesis (ISOMET) reaction is an emerging tool for “open loop” chemical recycling of polyethylene to propylene. Novel, latent N‐Alkyl substituted Cyclic(Alkyl)(Amino)Carbene (CAAC)–ruthenium catalysts (5a‐Ru, 3b‐Ru – 6c‐Ru) are developed rendering “inverted” chemical structure while… read more here.
Keywords: alkyl; metathesis isomet; isomerization metathesis; carbene ... See more keywords
Palladium‐Catalyzed Isomerization/(Cyclo)carbonylation of Pentenamides: a Mechanistic Study of the Chemo‐ and Regioselectivity
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DOI: 10.1002/cctc.201700345
Abstract: A new isomerizing ring‐closing amidocarbonylation reaction is reported using Pd catalysis with bulky diphosphane ligands. From terminal as well as internal pentenamide isomers (PAs), cyclic imides were obtained in good yield (92 %) with cationic Pd… read more here.
Keywords: isomerization cyclo; regioselectivity; study; isomerization ... See more keywords
A General Strategy for Open‐Flask Alkene Isomerization by Ruthenium Hydride Complexes with Non‐Redox Metal Salts
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DOI: 10.1002/cctc.201700687
Abstract: A homogenous metal hydride (M−H) catalyst for isomerization normally requires rigorous air‐free techniques. Here, we demonstrate a highly efficient protocol in which simple non‐redox metal ions as Lewis acids can promote olefin isomerization dramatically with… read more here.
Keywords: non redox; hydride; redox metal; open flask ... See more keywords
Ethylene Dimerization, Isomerization and Trimerization: Mechanistic Insights into Competing Pathways on Metal–Organic Framework Supported Metal Hydrides
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DOI: 10.1002/cctc.202400906
Abstract: Catalytic ethylene oligomerization is important in the petrochemical industry, as it produces valuable products like linear alpha‐olefins (LAOs) for the synthesis of polymers and specialty chemicals. Catalysts, typically transition metal complexes or metal‐containing materials, play… read more here.
Keywords: ethylene oligomerization; metal; trimerization; isomerization ... See more keywords
Synthesis of 16‐Electron RuHCl(CO)(PPh3)2 Catalyst Rendering Superior C═C Double Bond Isomerization Activity
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DOI: 10.1002/cctc.202500100
Abstract: The double bond isomerization of olefins is an atomicefficient, industrially highly relevant chemical reaction. One of its emerging applications is the tandem isomerization metathesis (ethenolysis) reaction (ISOMET or IE) used for transforming plastic waste to… read more here.
Keywords: ruhcl pph3; isomerization activity; double bond; bond isomerization ... See more keywords
Comparison of Various Phosphine Additives in Zeolite Based Catalytic Isomerization of Oleic Acid
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DOI: 10.1002/ejlt.201800070
Abstract: Isostearic acids (ISA) are important bio‐based ingredients for many commercial products such as lubricants, detergents, and cosmetics. This study is targeted to compare the efficacy of various phosphine derivatives in neutralizing the external acidic surface… read more here.
Keywords: phosphine additives; zeolite; phosphine; various phosphine ... See more keywords
Enhanced Solubility and Reduced Crystallinity of Carotenoids, β‐Carotene and Astaxanthin, by Z‐Isomerization
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DOI: 10.1002/ejlt.201800191
Abstract: The impact of the Z‐isomer content of carotenoids, β‐carotene and astaxanthin, on their solubility in organic solvents and crystallinity is investigated. Carotenoid samples containing different Z‐isomer contents are prepared from the high‐purity all‐E‐isomers by the… read more here.
Keywords: crystallinity; isomer; isomerization; carotenoids carotene ... See more keywords
Mechanistic Insights Into the Methoxycarbonylation of Technical Grade Oleochemicals: Catalytical and Structural Analysis of Conjugated Fatty Acid Methyl Esters
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DOI: 10.1002/ejlt.202400198
Abstract: This study examines the valorization of vegetable oils through Pd‐catalyzed methoxycarbonylation. It investigates the inhibitory effects of polyunsaturated fatty acid methyl esters (PU‐FAME) on catalyst activity, which are frequently reported in academic literature. A particular… read more here.
Keywords: structural analysis; methoxycarbonylation; methyl esters; acid methyl ... See more keywords