All articles by Katrina Krämer – Page 20
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PodcastAntihistamines
From calming a hyperactive immune system to increasing cognitive abilities, these small molecules have a big impact
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ResearchSuper-reactive molecule could solve space sugar mystery
How did carbohydrates form in space and on early Earth? The clue might be in the carbene
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ResearchChemists weave granny and triple trefoil knots
Interwoven grids folded into mechanically interlocked molecules, including a super-coiled three-trefoil
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ResearchReverse liquid sieve lets only large particles pass
Soap film that retains smaller particles while letting bigger ones through could be useful in open surgery or water-free toilets
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ResearchObserving orbitals solves hydrogen transfer puzzle
Visualising atoms’ wave function lets chemists tell true from indirect hydrogen atom transfer
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ResearchWorld’s oldest cheese contained infectious bacteria
3000-year-old cheese found in ancient Egyptian tomb was infected with brucellosis
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ResearchRed–blue light switch pushes equilibrium both ways
Switchable reaction cycle drives bond-making or breaking depending on light colour
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ResearchExoplanet with heavy metal atmosphere discovered
Iron found for the first time in gas giant’s ultra-hot atmosphere
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![Structural Characterization of r[5]C24+](https://d2cbg94ubxgsnp.cloudfront.net/Pictures/100x67/2/4/0/138240_CHEMPR499-10-7b.jpg)
ResearchMolecular necklace with record 24 positive charges made
Supercharged catenane squeezes 24 positive charges into five-ring interlocked system
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ResearchRound-the-ring catalysis makes cyclic peptides chiral
Classic hydrogenation catalyst installs multiple stereocentres one by one to create small amino acid rings as single enantiomers
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NewsMerck’s €10k synthesis competition will lab test routes
Pharma company offers €10,000 in prize money for retrosynthesis challenge that will bench test finalists’ proposals
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ResearchChameleon boron switches between electrophile and nucleophile
Mida boronates can be either electrophilic or nucleophilic in rearrangement reactions
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ResearchProbability count reveals single atoms under electron microscope
Statistical model removes human bias in finding individual atoms in fuzzy images
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ResearchHighly reactive carbocations tamed in bond forming reaction
Chemists harness vinyl cations for hydrocarbon synthesis and discover an unusual mechanism along the way
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ResearchMass spectrometry and machine learning find fake Robert Burns’ manuscripts
Chemical fingerprinting distinguishes famous Scottish poet’s 200-year-old letters from contemporary forgeries
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ResearchMOF detox could save aspirin overdose patients
Detoxifying metal–organic framework removes dangerous doses of salicylic acid from rats’ guts
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ResearchAntioxidant repair keeps radical reaction running
Repurposed antioxidant’s mechanism-mending properties make tough alkene alkylation possible
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ResearchFirst firm evidence for liquid water on Mars
Not quite life on Mars, but there are lakes beneath the red planet’s glaciers