Spirobifluorene-based hole-transporting materials for RGB OLEDs with high efficiency and low efficiency roll-off

Chemical Science, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

In this work, we designed and synthesized three spirobifluorene (SBF)-based hole-transporting materials (HTMs) by incorporating the di-4-tolylamino group at different positions of SBF skeleton. These demonstrate excellent thermal stability with decomposition temperatures (

Язык: Английский

How to Achieve Hydrogenation/Hydrofunctionalization via Metal Hydride Complexes

Accounts of Chemical Research, Год журнала: 2025, Номер unknown

Опубликована: Апрель 20, 2025

ConspectusMetal hydride (M-H) complexes have garnered widespread attention in the synthesis of fine chemicals, materials, agrochemicals, and pharmaceuticals owing to remarkable reactivity M-H bonds. Specifically, are active intermediates that catalyze hydrogen-transfer reactions, leading efficient hydrogenation hydrofunctionalization C═C/C═X (X = O or N) bonds unsaturated organic substrates for formation new carbon-hydrogen, carbon-carbon, carbon-heteroatom bonds.Our research group has long studied transformation mechanisms, with significant advancements over past decade. For this Account, we drawn on our extensive expertise investigate mechanisms governing numerous transformation-driven including inert C═X compounds, bonds, dehydrogenative coupling, C-H functionalizations. On basis these mechanistic investigations, developed a series representative models, which offer robust theoretical guidance modulating selectivity hydrofunctionalization.Our Account begins structures properties complexes, lead homolytic heterolytic cleavage reactions different conditions, showcasing versatility metal reactivity. Based principles, three modes discussed. First, transfer low-oxidation-state is chiefly engaged because hydrogen atom attached high electron density strongly nucleophilic. In case, serves as from center electropositive substrate through following pathways: (a) insertion an bond into bond; (b) direct electrophilic site (c) σ-bond metathesis; (d) oxidative migration. Reductive elimination might also occur when oxidation state increases becomes electron-deficient. This usually regenerates catalytic species while producing C/X'-H Notably, (MHAT) advanced approach radical-type hydrofunctionalizations. MHAT induced by one-electron redox process enabled paramagnetic low dissociation energy (BDE) values. Two possible types (i.e., spontaneous passive), regioselectivities, proposed. article provides detailed account strategies related transformations, thus offering valuable rational design novel reaction systems.

Язык: Английский

Synthesis of biaryl-based carbazoles via C-H functionalization and exploration of their anticancer activities

Organic & Biomolecular Chemistry, Год журнала: 2024, Номер 22(45), С. 8916 - 8944

Опубликована: Янв. 1, 2024

We described the application of C–H functionalization for constructing carbazole-based biaryls and their anticancer activities in cancer cell lines, e.g. , HeLa, HCT116, MDA-MB-231 MDA-MB-468 human embryonic kidney line HEK293T.

Язык: Английский