Results 221 to 230 of about 262,996 (265)

Illuminating Lead Coordination in Perovskite Precursors via Fluorescence Spectroscopy

open access: yesAngewandte Chemie, EarlyView.
Fluorescence spectroscopy captures the subtle yet critical changes in multi‐scale lead coordination environments in perovskite precursor. By systematically probing halide‐based [PbX6]⁴⁻ octahedra under varied solvents and cations, this work reveals “fingerprints” charting the evolution from low‐dimensional clusters to 3D frameworks.
Siwei Zhang   +9 more
wiley   +2 more sources

Excision of an Anal Leiomyoma. [PDF]

open access: yesDis Colon Rectum
Knowles JP, Golas BJ.
europepmc   +1 more source

Oxidative Rearrangements of the Alkaloid Intermediate Geissoschizine

open access: yesAngewandte Chemie, EarlyView.
19E‐geissoschizine is a key precursor in the biosynthesis of monoterpene indole alkaloids such as strychnine, ibogaine, and vinblastine. Using enzymatic assays and gene silencing, three CYPs were identified from C. roseus that oxidize this compound to four alkaloid scaffolds: strychnos, sarpagan, akuammiline, and mavacurane. Mutational analysis reveals
Mohamed O. Kamileen   +6 more
wiley   +2 more sources

Enantioselective Photochemical Generation of a Short‐Lived, Twisted Cycloheptenone Isomer: Catalytic Formation, Detection, and Consecutive Chemistry

open access: yesAngewandte Chemie, EarlyView.
In a proof‐of‐concept study, it was for the first time shown that planar chiral trans‐cycloalk‐2‐enones, such as 2, can be formed enantioselectively from their cis‐isomers by triplet energy transfer from a chiral catalyst. Computational studies performed with cyclohept‐2‐enone and enone 1 provided invaluable insights into the mode of action of the ...
Max Stierle   +10 more
wiley   +2 more sources

Azobenzene‐Oxindole Photochromic Dyads

open access: yesAngewandte Chemie, EarlyView.
A novel photochromic azobenzene‐oxindole dyad is reported. The combination of the two switches promotes drastic molecular geometry changes and allows for precise NMR quantification. This enables the study of the photokinetic behavior under different irradiation conditions and the discovery of a unique photokinetic relationship between the two ...
Marco Ovalle   +2 more
wiley   +2 more sources

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