Results 261 to 270 of about 1,811,886 (362)

Can Conformers Be Identified via Cyclic Ion Mobility Mass Spectrometry? Hexosamine Epimers Reveal Ultrastable Ring Structures

open access: yesChemistry–Methods, EarlyView.
It was demonstrated how carbohydrate ring structures can be separated and identified using cyclic ion mobility mass spectrometry, making solid‐, solution‐, and gas‐phase structures comparable. In addition, it was determined which collisional cross‐section prediction or calculation method is the best suited for carbohydrates.
Viktória Goldschmidt Gőz   +7 more
wiley   +1 more source

Surface inclusion and dynamics of cucurbit[7]uril-based supramolecular complexes. [PDF]

open access: yesChem Sci
Santos Hurtado C   +6 more
europepmc   +1 more source

Exploring the Photophysical Processes of an Al3+ Sensor Based on Schiff Base

open access: yesChemPhysChem, EarlyView.
Multiple excited‐state intramolecular proton transfer (ESIPT) processes and twisted intramolecular charge transfer (TICT) states are observed on the S1 state potential energy surface of an Al3+ sensor. The ESIPT process induces an ultrafast CC rotation process and leads to a non‐emissive TICT state.
Bingqing Sun   +4 more
wiley   +1 more source

UV–Vis Spectra of Carbonic Acid: Rationalizing Experimental Redshifts between Monomer and Bulk based on (H2CO3)n Calculations

open access: yesChemPhysChem, EarlyView.
In bulk carbonic acid (e.g., in interstellar icy dust grains) cluster formation produces two distinct UV‐Vis spectral features redshifted by ≈2 eV (25 nm) and by ≈5 eV (80 nm) compared to gas phase single molecule carbonic acid 's adiabatic ionization energy. Theory and experiment were used to investigate the origin of these shifts.
Dennis F. Dinu   +7 more
wiley   +1 more source

Exploring the Helical Structure of Ethylene Oxides: Beyond Steric and Related Effects

open access: yesChemPhysChem, EarlyView.
A helical structure in ethylene oxides begins to emerge early as the chain length increases in solution. This formation is facilitated by the attenuation of dipolar repulsion and stabilization of dipoles. However, it is primarily driven by hyperconjugative interactions, which often underpin gauche effects and dominate over Lewis‐type interactions ...
Matheus P. Freitas
wiley   +1 more source

Donor–Acceptor Interactions of C60F18 with Polycyclic Aromatic Hydrocarbons: Size Effects in Bulk Crystallization and Surface Constraints

open access: yesChemPlusChem, EarlyView.
Donor–acceptor (D/A) interactions between spheroidal C60F18 and three planar polycyclic aromatic hydrocarbons (PAHs)—coronene (CORO), perylene , and pyrene—show a strong dependence on PAH size. X‐Ray diffraction reveals increasing layered stacking (either D/A/D/A or D/A/A/D/A/A).
Nicholas J. DeWeerd   +9 more
wiley   +1 more source

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