Synthesis to enhance the electron donor ability of organic radicals has not been attempted due to reactivity challenges. Herein, naphthalenediimide-based (NDI) zwitterionic radicals are synthesized and isolated bestowing SOMO levels up to -4.04 eV. As a result, reduction of the NDI is realized with NDI radicals in their ground states. Notably, reduction of the NDI unit applying a π-electron donor is unprecedented and has been limited to inorganic/organometallic reagents or by light-driven excited states.
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http://dx.doi.org/10.1021/acs.orglett.0c01263 | DOI Listing |
J Am Chem Soc
January 2025
State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
The cycloaddition of aziridines with unsaturated compounds is a valuable method for synthesizing nitrogen heterocycles. However, this process is predominantly substrate-controlled, posing significant challenges in regulating the regioselectivity of the C-N bond cleavage. In this study, we report a nickel-catalyzed dynamic kinetic activation strategy that enables catalyst-controlled activation of aziridines.
View Article and Find Full Text PDFLangmuir
January 2025
Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, Shosha, Himeji, Hyogo 671-2201, Japan.
To prepare amphiphilic diblock copolymers (MP), a controlled radical polymerization approach was employed, incorporating hydrophilic poly(2-(methacryloyloxy)ethyl phosphorylcholine) (PMPC) with hydrophobic poly(3-methoxypropyl acrylate) (PMPA). The synthesized diblock copolymers feature a PMPC block with a degree of polymerization (DP) of 100 and a PMPA block with DP (=) values of 171 and 552. The hydrophilic PMPC block exhibits biocompatibility, such as inhibition of platelet and protein adsorption, because of its hydrophilic pendant zwitterionic phosphorylcholine groups that have the same chemical structure as cell membrane surfaces.
View Article and Find Full Text PDFMater Today Bio
October 2024
Department of Otorhinolaryngology Head and Neck Surgery, The Affiliated Lihuili Hospital of Ningbo University, Ningbo, 315040, Zhejiang, PR China.
The tympanic membrane (TM) is constantly in a state of vibrating. However, there is currently a lack of drug-delivery scaffolds suitable for the dynamic environment of TM perforation. In this study, a mechano-responsive tough hydrogel was developed.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Jharkhand, 826004, India.
Int J Biol Macromol
December 2024
Department of Chemistry and Chemical Engineering, Beijing Forestry University, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing 100083, China. Electronic address:
Design and development of a multifunctional wound dressing with self-healing, adhesive, and antibacterial properties to attain optimal wound closure efficiency are highly desirable in clinical applications. Nevertheless, conventional hydrogels face significant barriers in their mechanical strength, adhesive performance, and antibacterial properties. Herein, a tough hydrogel based on aldehyde-grafted galactomannan was synthesized through radical copolymerization and Schiff base reaction, incorporating hyaluronic acid, acrylamide, and the zwitterionic monomer to create a multi-crosslinked structure.
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