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The precise control of the chirality of polymer assemblies is a challenge faced by scientists and has received significant attention in recent years. In this study, we employed the polymerization-induced chiral self-assembly (PICSA) method to create chiral side-chain cyanobiphenyl (CB) block copolymer (BCP) assemblies. The flexible spacers in chiral CB monomers were regulated to exhibit two distinct odd-even effects in the supramolecular asymmetrical arrangement of the CB mesogens inside BCP assemblies. The research results indicated that the liquid crystalline properties of CB mesogens significantly influence the magnitude and sign of their chiroptical properties. These findings have significant implications for the design of polymer assemblies with designable chiroptical functions.
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http://dx.doi.org/10.1039/d4nr02532f | DOI Listing |
Chem Sci
August 2025
Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
Ring-opening/cyclization represents a classic reaction of bicyclic diaziridines. In this study, an unprecedented ring-opening/migration cascade process was discovered in the reaction between bicyclic diaziridines and donor-acceptor (D-A) cyclopropanes. By employing a chiral ,'-dioxide/scandium(iii) complex as the catalyst, a diverse array of chiral dihydro-1-pyrazoles with a stereocenter in the side chain was efficiently synthesized featuring excellent ee values.
View Article and Find Full Text PDFAnal Chem
September 2025
Shandong Provincial Key Laboratory of Tumor Imaging Equipment Development and Integrated Diagnosis and Treatment Technology, Institute of Biochemical Analysis, Linyi University, Lin Yi 276000, Shandong China.
The differences in the spatial structures of chiral enantiomers often lead to variations in physiological activity. Focusing on the stereoselective behavior of chiral enantiomers, timely and accurate risk assessment has become an important issue in pharmaceutical research development. The development of high-selectivity and rapid discrimination detection methods is the key to chiral enantiomer-related research.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
Forschungszentrum Jülich GmbH, Helmholtz-Institute Erlangen-Nürnberg (HI-ERN), 91058 Erlangen, Germany.
Achieving high performance and long-term stability in perovskite solar cells (PSCs) typically requires the use of surface passivation layers to suppress the interfacial defects. However, these additional passivation agents often introduce chemical and structural instabilities, limiting the device lifetime. Here, we present a molecular engineering strategy utilizing a chiral series of C-Furan-Sugar (CFS) fullerene derivatives blended with [6,6]-phenyl-C-butyric acid methyl ester (PCBM) to modify the electron transport layer (ETL).
View Article and Find Full Text PDFJ Am Chem Soc
August 2025
Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
Herein, we report that molecular tension generated by the swelling of a polyacrylate network containing a chiral [Biphep]Rh(I) catalyst as a tension-bearing, bis-tethered cross-linker enhances the enantioselectivity of hydrogenation of methyl 2-acetamidoacrylate. Differential swelling of the network is achieved by changing the relative concentrations of toluene (low swelling) and dichloromethane (high swelling) cosolvents. Swelling is characterized by the ratio of final to initial length in a single dimension of the network (λ = /), noting that changes are the same in all dimensions; λ = λ = λ.
View Article and Find Full Text PDFSci Technol Adv Mater
July 2025
Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology, Takamatsu, Japan.
Room-temperature bulk photovoltaic effect of a ferroelectric liquid crystal based on diphenylterthiophene bearing dilactate side chains is provided in this study. In the polarized smectic phase of this compound, the improved bulk photovoltaic effect was observed without electron acceptors, indicating the open-circuit voltage of 1.1 V.
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