Results 271 to 280 of about 391,792 (372)

Modulation of Lanthanide Luminescence with the Mechanical Bond: Antenna‐Emitter Confinement in a Compact [2]Rotaxane

open access: yesAngewandte Chemie, EarlyView.
Luminescent lanthanide emitters typically need sensitization from an attached chromophore – an “antenna” – to have useful emission intensities. Here we show that the mechanical bond can be used to connect the antenna to the emitter, providing unique stimuli‐responsiveness to the resulting assemblies.
Anja Ramström   +5 more
wiley   +2 more sources

Thermodynamics of Water Displacement from Binding Sites and its Contributions to Supramolecular and Biomolecular Affinity

open access: yesAngewandte Chemie, EarlyView.
The affinity between a guest and a macrocyclic host depends strongly on the water encapsulated inside the host cavity, with free‐energy variations on the order of 20 kcal mol−1 being possible even in the absence of direct host‐guest interactions. This conclusion–which contrasts alternative views–can be drawn from molecular dynamics simulations for the ...
Jeffry Setiadi   +3 more
wiley   +2 more sources

Helicenes with Four Helical Turns: Dimerization of [13]Helicenes to [27]Helicenoids

open access: yesAngewandte Chemie, EarlyView.
The telephone cord challenge: When a 2‐naphthol‐annulated hetero[13]helicene is oxidatively dimerized, two structurally distinct hetero[27]helicenes (both with four helical turns) are formed. When a racemic mixture of [13]helicenes is dimerized, a (M)‐ and a (P)‐helicene join to form a mixed [27]helicenoid (right), and when an enantiomerically pure [13]
Matea Sršen   +4 more
wiley   +2 more sources

Selective Chemo‐Divergent Hydrogenation of Ethylene Carbonate Enabled by Multi‐Functional Poly(Ionic Liquids)‐Stabilized Ru Nanoparticles

open access: yesAngewandte Chemie, EarlyView.
A highly efficient and selective chemo‐divergent hydrogenation of cyclic carbonates is promoted by in situ generated poly(ionic liquid)‐stabilized ruthenium nanoparticles (Ru@PIL) catalysts. Under solvent‐free conditions, ethylene carbonate is transformed into either ethylene glycol and CH4 or EtOH and CO2, following a “direct hydrogenation” or a ...
Wenjuan Wang   +2 more
wiley   +2 more sources

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