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Thermocontrolled Radical Nucleophilicity vs Radicophilicity in Regiodivergent C-H Functionalization.
Org Lett
January 2025
School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India.
The temperature-dependent switching behavior of the saccharin radical is demonstrated, enabling the regiodivergent C-H and C-H functionalization of quinoxalin-2(1)-ones. The saccharin radical was generated through N-Br bond cleavage in -bromosaccharin (NBSA) and was observed to transition between radical and radicophile roles. At -10 °C, it was utilized as a radicophile, resulting in 100% C-amination, while at +35 °C, it acted as a radical, leading to exclusive C-bromination.
View Article and Find Full Text PDFEffect of Superficial Large Vessel Insulation Combined with Self-heating Warm Paste on Intraoperative Hypothermia in Patients Undergoing Urologic Surgery.
Arch Esp Urol
December 2024
Surgical Complex, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, 317000 Taizhou, Zhejiang, China.
Objective: This study aimed to explore the application effect of superficial large vessel insulation combined with self-heating warm paste on intraoperative hypothermia in patients undergoing urologic surgery.
Methods: This study included 313 patients who underwent urologic surgery in Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University from May 2023 to March 2024. After 13 patients with incomplete clinical data, abnormal basal metabolism and preoperative skin injury were excluded, 300 patients were finally included.
Construction and validation of a nomogram predictive model for assessing the risk of surgical site infections following posterior lumbar fusion surgery.
Sci Rep
January 2025
Department of Spinal Surgery, Orthopedic Medical Center, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Central, Guangzhou, 510260, Guangdong Province, China.
Surgical site infections (SSIs) are a significant concern following posterior lumbar fusion surgery, leading to increased morbidity and healthcare costs. Accurate prediction of SSI risk is crucial for implementing preventive measures and improving patient outcomes. This study aimed to construct and validate a nomogram predictive model for assessing the risk of SSIs following posterior lumbar fusion surgery.
View Article and Find Full Text PDFBoosting the Actuation Performance of a Dynamic Supramolecular Polyurethane-Urea Elastomer via Kinetic Control.
ACS Appl Mater Interfaces
January 2025
College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
The ongoing soft actuation has accentuated the demand for dielectric elastomers (DEs) capable of large deformation to replace the traditional rigid mechanical apparatus. However, the low actuation strain of DEs considerably limits their practical applications. This work developed high-performance polyurethane-urea (PUU) elastomers featuring large actuation strains utilizing an approach of kinetic control over the microphase separation structure during the fabrication process.
View Article and Find Full Text PDFPt/IrO enables selective electrochemical C-H chlorination at high current.
Nat Commun
January 2025
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Republic of Singapore.
Employing electrochemistry for the selective functionalization of liquid alkanes allows for sustainable and efficient production of high-value chemicals. However, the large potentials required for C(sp)-H bond functionalization and low water solubility of such alkanes make it challenging. Here we discover that a Pt/IrO electrocatalyst with optimized Cl binding energy enables selective generation of Cl free radicals for C-H chlorination of alkanes.
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