Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Reviews in Angewandte Chemie, written by leading experts, summarize the important results of recent research on topical subjects in all branches of chemistry, point to unresolved problems, and discuss possible developments. Although review articles are generally written upon invitation of the editor, unsolicited manuscripts are also welcome provided they are in keeping with the character of the journal.
During the past 50 years, PNIPAM became the leading member of the growing families of thermoresponsive polymers and of stimuli-responsive polymers in general. Its thermal response is unanimously attributed to its phase behavior. Yet, in spite of 50 years of research, a coherent quantitative picture remains elusive. This Review aims to alert to open questions in this field.
The grand old newcomer: Silicon may be the “grand old semiconductor”, however, it is a relative newcomer to the field of quantum dots. Silicon nanocrystals (Si-NCs) are emerging as a promising, non-toxic, and greener alternative to Group II–VI and III–V quantum dots. This Review highlights how surface chemistry can be used to engineer properties of Si-NCs and adapt them towards modern applications, such as sensors, photovoltaics, and light-emitting diodes.
Safety net: Polymer electrolytes are a safe alternative to conventional liquid electrolytes in lithium batteries. Their main drawback is low ionic conductivity at room temperature. The most promising solution for this issue is incorporation of ionic liquids, which enhance the performance without decline in safety. This Review elucidates the interactions in these ternary polymer electrolytes and their performance in lithium-metal polymer batteries.
Inspired by nature: Hierarchical nanomaterials are highly suitable as electrocatalysts and electrocatalyst supports in electrochemical energy conversion devices. To further improve their design, in-depth research on the effect of materials architecture on reaction and transport kinetics is necessary. Inspiration can be derived from nature, which is full of very effective hierarchical structures.
Molecular componentry for all the cellular subsystems can be derived from hydrogen cyanide—“Blausäure”—suggesting life arose “out of the blue”.
The unique reactivity and selectivity of radicals paired with the possibility to cross between different regimes (radical/ionic/organometallic) results in catalysis of radical reactions playing an important role in organic synthesis. The basic concepts of catalyzed radical reactions are introduced and illustrated with selected examples from classical and recent literature.