Rhodium(III)-catalyzed oxidative olefination of N-(1-naphthyl)sulfonamides has been achieved at the peri position. Three categories of olefins have been successfully applied. Activated olefins reacted to afford five-membered azacycles as a result of oxidative olefination-hydroamination. Unactivated olefins reacted to give the olefination product. 2-fold oxidative C-C and C-N coupling was achieved for allylbenzenes.
Intraventricular haemorrhage (IVH) is defined as the eruption of blood in the cerebroventricular system and occurs mostly secondary to intracerebral haemorrhage (ICH) in adults. Hydrocephalus is a severe complication of IVH that can serve as an independent predictor of increased mortality. In this mini-review, we focus on the mechanisms of hydrocephalus after adult IVH, including blood-clot blockage, barrier impairment, inflammation and blood components, and attempt to reconcile the current research findings into a unified framework. We expect our theoretical framework to help guide future clinical and basic research leading to improved monitoring and intervention for IVH and subsequent hydrocephalus.
The sulfur redox in Li–S batteries
involves a complex sequence
of solid–liquid–solid conversions, and reaction catalysis
has recently become a focused area for further advancement. The deposition
of solid Li2S from liquid Li2S4 contributes
to three-quarters of the total theoretical capacity and is therefore
of great significance over the entire cathode reaction. This study
demonstrates a cathode material composed of carbon nanofibers decorated
with catalytic Co phthalocyanine nanorods (CoPc@CNF), which are highly
effective in promoting the deposition of Li2S in three-dimensional
(3D) fine particles rather than 2D thin films. This significantly
alleviates cathode passivation during cell charge and discharge, leading
to obviously improved sulfur utilization and cycling stability for
high loading cathodes. DFT calculations indicate that the promoted
3D deposition of Li2S is related to the facilitated migration
of deposition precursors (Li2S4 and Li-ions)
to migrate on the CoPc nanorods. Lithium–sulfur (Li–S)
pouch cells were prepared with high specific (954 mAh g–1), areal (4.8 mAh cm–2), and total (235 mAh) capacities
achieved at 0.5 C under high sulfur content. As metal phthalocyanines
possess a high structural variability, this study provides opportunities
to the design of a new class of Li–S cathode materials.
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