98%
921
2 minutes
20
Recent years have seen increasing interest in uranyl(VI) photocatalysis. In this study, uranyl complexes were successfully synthesized from ligands - and UO(NO)·6HO under reflux conditions, yielding products - with yields ranging from 30% to 50%. The complexes were thoroughly characterized using NMR spectroscopy, single-crystal X-ray diffraction, and elemental analysis. The results indicate that complexes - possess a pentagonal bipyramidal geometry, whereas complex exhibits an octahedral structure. The photocatalytic properties of these novel complexes for sp C-H bond functionalization were explored. The results demonstrate that complex functions as an efficient photocatalyst for converting C-H bonds to C-C bonds via hydrogen atom transfer under blue light irradiation.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11397425 | PMC |
http://dx.doi.org/10.3390/molecules29174077 | DOI Listing |
J Am Chem Soc
September 2025
Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States.
The direct transformation of C-H bonds into C-C bonds via cross-dehydrogenative coupling (CDC) represents a powerful strategy in synthetic chemistry, enabling streamlined bond construction without the need for prefunctionalized substrates. While traditional CDC approaches rely on polar mechanisms and preactivation of one of the C-H partners, recent advances have introduced radical-based strategies that employ a hydrogen atom transfer (HAT) approach to access carbon-centered radicals from unactivated substrates. Herein, we report a nickel-catalyzed CDC reaction between aldehydes and alkenes for the synthesis of skipped enones, leveraging aryl radicals as intermolecular HAT agents.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
State Key Laboratory of Chemistry for NBC Hazards Protection, College of Chemistry, Fuzhou University, Fuzhou 350116, P. R. China.
The activation of methane and other gaseous hydrocarbons at low temperature remains a substantial challenge for the chemistry community. Here, we report an anaerobic photosystem based on crystalline borocarbonitride (BCN) supported Fe-O nanoclusters, which can selectively functionalize C-H bonds of methane, ethane, and higher alkanes to value-added organic chemicals at 12 °C. Scanning transmission electron microscopy and X-ray absorption spectroscopy corroborated the ultrafine FeOOH and FeO species in Fe-O clusters, which enhanced the interfacial charge transfer/separation of BCN as well as the chemisorption of methane.
View Article and Find Full Text PDFJ Org Chem
September 2025
State Key Laboratory of Chemical Resource Engineering, Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China.
The -di(2-pyridyl)arenes, featuring a unique structure, hold significant promise for applications in fluorescent probes, synthetic nanoparticle stabilizers, and chemical synthesis. The mechanism of Ru-catalyzed decarboxylation and heteroarylation reactions of aryl carboxylic acids to access -dipyridylarenes was elucidated using DFT calculations, which involved C-H bond activation, oxidative addition, reductive elimination, and decarboxylation processes to form -di(2-pyridyl)arenes. The rate-determining step of the reaction is the second reductive elimination step with an energy barrier of 27.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
Department of Chemistry, Rutgers University-Newark, Newark, New Jersey 07102, United States.
Carbon-hydrogen bond activation is a pillar of synthetic chemistry. While it is generally accepted that Pd is more facile than Ni in C-H activation catalysis, there are no experimental platforms available to directly compare the magnitude of C-H bond weakening between Ni and Pd prior to bond scission. This work presents the first direct measurements of C(sp)-H bond acidity (p) and bond dissociation free energy (BDFE) for a species containing a ligated alkane-palladium interaction (RCH···Pd), also known as an agostic interaction.
View Article and Find Full Text PDFChem Sci
August 2025
College of Chemistry and Materials Science, Key Laboratory of Chemical Biology of Hebei Province, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Institute of Life Science and Green Development Hebei University Baoding Hebei 071002 P. R. China
The photocatalytic oxidative dipolar [3 + 2] cycloaddition reaction is a promising green approach for producing pyrrolo[2,1-]isoquinolines. However, developing sustainable cycloaddition methods with heterogeneous photocatalysts is still in its infancy, largely owing to their low reactivity and photostability. Herein, we propose a charge-oxygen synergy strategy through a dual-engineered covalent organic framework (COF) by integrating π-spacers with donor-acceptor motifs to promote intermolecular cycloaddition.
View Article and Find Full Text PDF