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Now Available with a Negative Charge too

Stabilization of the borafluorene anion with carbenes

07-May-2021

The incorporation of boron into polycyclic aromatic hydrocarbon systems leads to interesting chromophoric and fluorescing materials for optoelectronics, including organic light-emitting diodes (OLEDS) and field-effect transistors, as well as polymer-based sensors. In the journal Angewandte ...

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CO2 Catalysis Made More Accessible

An economical alloy-based aerogel as electrocatalyst for carbon fixation

03-May-2021

Many industrial processes emit carbon dioxide into the atmosphere. Unfortunately, however, current electrochemical separation methods are expensive and consume large amounts of power. They also require expensive and rare metals as catalysts. A study in the journal Angewandte Chemie describes a ...

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The Fastest One Wins

Enantioselective synthesis of indole derivatives

12-Apr-2021

Indole, and structures derived from it, are a component of many natural substances, such as the amino acid tryptophan. A new catalytic reaction produces cyclopenta[b]indoles—frameworks made of three rings that are joined at the edges—very selectively and with the desired spatial structure. As a ...

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Degradable sugar-based polymers may store and release useful molecular freight

Options for chemical plastic recycling

25-Jan-2021

Degradable, bio-based polymers offer options for chemical recycling, and they can be a tool to store and release useful molecules. Scientists have developed a class of sugar-based polymers that are degradable through acid hydrolysis. The researchers also integrated “cargo” molecules in the ...

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Purely Organic Hole Transporter

Dopant-free, humidity-stable organic layers give perovskite solar cells 21% efficiency

19-Jan-2021

Durable, high-performing perovskite solar cells also require durable, high-performing charge-transporting layers. Scientists have developed the first organic hole transporter that does not need a dopant to attain high charge mobility and stability. According to the study published in the journal ...

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Inverted Fluorescence

Discovery of chromophores that emit light in the ultraviolet region when excited with visible light

23-Dec-2020

Fluorescence usually entails the conversion of light at shorter wavelengths to light at longer wavelengths. Scientists have now discovered a chromophore system that goes the other way around. When excited by visible light, the fluorescent dyes emit light in the ultraviolet region. According to ...

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Anions Matter

Zinc-ion hybrid capacitors with ideal anions in the electrolyte show extra-long performance

18-Nov-2020

Metal-ion hybrid capacitors combine the properties of capacitors and batteries. One electrode uses the capacitive mechanism, the other the battery-type redox processes. Scientists have now scrutinized the role of anions in the electrolyte. The results, which have been published in the journal ...

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Well oriented: Catalysts for isotactic polar polypropylenes

Japanese scientists developed a new approach that allows more suitable catalysts to be produced much more easily

03-Nov-2020

Polypropylene (PP) is one of the most widely used plastics in the world. By controlling the spatial orientation of the propylene building blocks and additional polar components, it should be possible to create a new generation of attractive, engineered, specialty plastics, with improved ...

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Ultraheavy precision polymers

Controlled photoenzymatic RAFT polymerization of nonconjugated polymers

30-Oct-2020

An environmentally friendly and sustainable synthesis of "heavyweight" polymers with very narrow molecular weight distributions is an important concept in modern polymer chemistry. Thanks to a new photoenzymatic process, Chinese researchers have been able to increase the range of possible ...

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Palladium Catalysts Can Do Its

Direct coupling of aryl halides and alkyllithium compounds by palladium catalysis

14-Oct-2020

Palladium catalysts help synthesize key chemicals for many industries. However, direct reaction of two basic reagents, aryl halides and alkyllithium compounds, remains a challenge. Now, a team of scientists have found that a catalyst containing YPhos-type ligands can mediate this reaction even at ...

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