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Chiral Resolution and Chiroptical Properties of Hindered Tetraphenylethylene Helicates.
Org Lett
January 2025
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Hindered tetraphenylethylene (hTPE) helicates are resolved into two left-handed (M) and right-handed (P) isomers by linkage and removal of chiral auxiliary (1,2,5)-menthol, furnishing gram-scale hTPE enantiomers via flash silica column chromatography. hTPE helicate enantiomers bearing electron-accepting cyano and electron-donating triphenylamine groups can emit deep-blue CPL signals with a fluorescence quantum yield surpassing 50%. Full-color and white-light emission were achieved by blending them with dyes in a poly(methyl methacrylate) (PMMA) film.
View Article and Find Full Text PDFSymmetry Breaking: Case Studies with Organic Cage-Racemates.
Acc Chem Res
January 2025
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
ConspectusSymmetry is a pervasive phenomenon spanning diverse fields, from art and architecture to mathematics and science. In the scientific realms, symmetry reveals fundamental laws, while symmetry breaking─the collapse of certain symmetry─is the underlying cause of phenomena. Research on symmetry and symmetry breaking consistently provides valuable insights across disciplines, from parity violation in physics to the origin of homochirality in biology.
View Article and Find Full Text PDFOn the Influence of Additives and Modifiers on the Chiral HPLC Separation of the Enantiomers of Nicotine.
Chirality
February 2025
Daicel Chiral Technologies, West Chester, Pennsylvania, USA.
The influence of additives and modifiers on the chiral HPLC separation of the nicotine enantiomers using UV/Vis detection is discussed. Selected alcohols as modifiers and selected amines as additives were found to have a significant effect on the resolution and retention times of nicotine enantiomers even to the point of eliminating component elution. Systematic variations in the concentration of ethanol, methanol, and isopropanol, as modifiers, along with variations in the concentration of diethylamine, triethylamine, tributylamine, ethylenediamine, isopropylamine, as additives, revealed that the average resolution (R) of the nicotine enantiomers ranged from 2.
View Article and Find Full Text PDFCorrection: Magin et al. Impact of Non-Covalent Interactions of Chiral Linked Systems in Solution on Photoinduced Electron Transfer Efficiency. 2023, , 9296.
Int J Mol Sci
January 2025
Voevodsky Institute of Chemical Kinetics and Combustion, 630090 Novosibirsk, Russia.
The journal's Editorial Office and Editorial Board are jointly issuing a resolution and removal of the Journal Notice linked to this article [...
View Article and Find Full Text PDFAutomatic monitoring and on-line chiral separation of chiral drug synthesis.
J Chromatogr A
January 2025
College of Chemistry and Materials Engineering, Bohai University, Jinzhou, Liaoning Province 121013, PR China.
Chiral synthesis of single chiral drugs offers high efficiency, controllable costs, and excellent enantioselectivity, making it crucial in the pharmaceutical industry. A significant number of studies on chiral drug synthesis primarily focuses on the design and synthesis of innovative chiral catalysts and ligands with extremely high selectivity, as well as the development of new methods and strategies. Nonetheless, the on-line monitoring of chiral drug synthesis and its underlying mechanisms remain obscure.
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