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We report on the synthesis and characterization of a series of (mostly) air‐stable diorganyl bis(pyridylimino) isoindolide (BPI) aluminum complexes and their chemistry upon visible‐light excitation. The redox non‐innocent BPI pincer ligand allows for efficient charge transfer homolytic processes of the title compounds. This makes them a universal platform for the generation of carbon‐centered radicals. The photo‐induced homolytic cleavage of the Al−C bonds was investigated by means of stationary and transient UV/Vis spectroscopy, spin trapping experiments, as well as EPR and NMR spectroscopy. The experimental findings were supported by quantum chemical calculations. Reactivity studies enabled the utilization of the aluminum complexes as reactants in tin‐free Giese‐type reactions and carbonyl alkylations under ambient conditions, which both indicated radical‐polar crossover behavior. A deeper understanding of the physical fundamentals and photochemical process was provided, furnishing in turn a new strategy to control the reactivity of bench‐stable aluminum organometallics. [ABSTRACT FROM AUTHOR]

A new homoleptic Co(II) complex bearing two highly sterically congested 2-formiminopyrrolyl N,N′-chelating ligands is reported, displaying slow relaxation of the magnetisation at zero static (DC) field. This compound shows a large value for the zero-field splitting (ZFS) parameter D of −42.6(4) cm−1 leading to a spin-reversal energy barrier Ueff of 85 cm−1. [ABSTRACT FROM AUTHOR]

The article titled "Titelbild: Aktivierung von Diorganyl‐bis(pyridylimino)isoindolid‐Aluminiumkomplexen mit sichtbarem Licht und deren organometallische Radikalreaktivität (Angew. Chem. 19/2024)" discusses the activation of diorganyl-bis(pyridylimino)isoindolid-aluminium complexes using visible light and their organometallic radical reactivity. The cover picture shows one of the title complexes, where a chelating ligand is coordinated to the central aluminum atom. The picture highlights a homolytic bond rupture event, with one of the phenyl rings being "blown" away by light. The article also mentions another research study on the synthesis of unstable polyoxometalates using a coordination cage approach. [Extracted from the article]

The article titled "Cover Picture: Visible-Light Activation of Diorganyl Bis(pyridylimino) Isoindolide Aluminum(III) Complexes and Their Organometallic Radical Reactivity" discusses the coordination of a chelating ligand to an aluminum atom in a complex. The ligand is coordinated by three nitrogen donors, and the aluminum atom has two phenyl rings as substituents. The article highlights a homolytic bond rupture event where one of the phenyl rings is "blown" away by light, indicating its radical nature. The study is reported by Andreas-Neil Unterreiner, Frank Breher, and others. Additionally, the article mentions another research article by Cui-Lian Liu, Tatjana N. Parac-Vogt, and others, which demonstrates a "ship-in-a-bottle" approach for the synthesis of unstable polyoxometalates using a coordination cage. [Extracted from the article]

Hybrid materials consisting of organic semiconductors and molecular quantum bits promise to provide a novel platform for quantum spintronic applications. However, investigations of such materials, elucidating both the electrical and quantum dynamical properties of the same material have never been reported. Here the preparation of hybrid materials consisting of conducting polymers and molecular quantum bits is reported. Organic field‐effect transistor measurements demonstrate that the favorable electrical properties are preserved in the presence of the qubits. Chemical doping introduces charge carriers into the material, and variable‐temperature charge transport measurements reveal the existence of mobile charge carriers at temperatures as low as 15 K. Importantly, quantum coherence of the qubit is shown to be preserved up to temperatures of at least 30 K, that is, in the presence of mobile charge carriers. These results pave the way for employing such hybrid materials in novel molecular quantum spintronic architectures. [ABSTRACT FROM AUTHOR]

We report on the synthesis and characterization of a series of (mostly) air-stable diorganyl bis(pyridylimino) isoindolide (BPI) aluminum complexes and their chemistry upon visible-light excitation. The redox non-innocent BPI pincer ligand allows for efficient charge transfer homolytic processes of the title compounds. This makes them a universal platform for the generation of carbon-centered radicals. The photo-induced homolytic cleavage of the Al-C bonds was investigated by means of stationary and transient UV/Vis spectroscopy, spin trapping experiments, as well as EPR and NMR spectroscopy. The experimental findings were supported by quantum chemical calculations. Reactivity studies enabled the utilization of the aluminum complexes as reactants in tin-free Giese-type reactions and carbonyl alkylations under ambient conditions, which both indicated radical-polar crossover behavior. A deeper understanding of the physical fundamentals and photochemical process was provided, furnishing in turn a new strategy to control the reactivity of bench-stable aluminum organometallics., (© 2024 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)

A new homoleptic Co(II) complex bearing two highly sterically congested 2-formiminopyrrolyl N , N '-chelating ligands is reported, displaying slow relaxation of the magnetisation at zero static (DC) field. This compound shows a large value for the zero-field splitting (ZFS) parameter D of -42.6(4) cm -1 leading to a spin-reversal energy barrier U eff of 85 cm -1 .