Results 201 to 210 of about 372,836 (352)

Rh‐Catalyzed [2 + 2 + 2] Cycloaddition of Linked Bis(Diynes) Ar‐C≡C‐C≡C‐(CH2)3‐C≡C‐C≡C‐Ar With Quinones: Synthesis and Photophysical Properties of Bis(Arylethynyl)‐Naphthoquinones and Anthraquinones

open access: yesChemistry – A European Journal, EarlyView.
We report the synthesis bis(arylethynyl)naphtho‐ and anthraquinones via Rh(I)‐catalyzed [2 + 2 + 2] cycloaddition reactions. The substrate scope of both quinones and linked bis‐diynes was explored. Microwave irradiation remarkably enhanced yields.
Luana A. Machado   +16 more
wiley   +1 more source

Rational Modulation of Excited‐State Intramolecular Proton Transfer, Aggregation‐Induced Emission, and Intramolecular Motion on Polysubstituted Imidazoles

open access: yesChemPhotoChem, EarlyView.
Precise modulation of the excited‐state intramolecular proton transfer (ESIPT) process was achieved using a newly synthesized family of N‐substituted imidazoles. Combined experimental and theoretical approaches reveal how N‐alkyl and 2‐(methoxy)phenyl modulate enol‐keto equilibrium, molecular conformation, and emission behavior.
Ángel D. Álvarez‐Castillo   +7 more
wiley   +1 more source

Investigation of the failure characteristics of fissure tunnels under dynamic and static combinations

open access: yesDeep Underground Science and Engineering, EarlyView.
This article aims to investigate the dynamic fracture response of fractured tunnel models under zero geological stress through physical experiments and numerical simulations. It further simulates the dynamic fracture characteristics of fractured tunnel models under geological stress ranging from 0 to 2.5 MPa using the numerical software AUTODYN ...
Peng Ying   +7 more
wiley   +1 more source

Correlation between clinical, MRI and arthroscopic findings in various shoulder joint disorders

open access: diamond
Ayush Gupta   +4 more
openalex   +2 more sources

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