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Gas-phase and water-mediated mechanisms for the OCS + OH reaction.
Phys Chem Chem Phys
January 2025
Departamento de Físico-Química, Instituto de Química - Universidade Federal da Bahia, Rua Barão de Jeremoabo, 147, Salvador, Bahia, 40170-115, Brazil.
We report a computational study of the gas-phase and water-mediated mechanisms for the oxidation of carbonyl sulfide (OCS) by the hydroxyl radical. To achieve reliable results, we employ a dual-level strategy within interpolated single-point energies (VTST-ISPE) at the CCSD(T)/aug-cc-pVTZ//M06-2X/aug-cc-pVTZ level of theory. In the gas-phase mechanism, we have determined the rate constants by kinetic Monte Carlo simulation in the interval of temperatures of 250-550 K.
View Article and Find Full Text PDFLow temperature thermal RAFT depolymerization: the effect of Z-group substituents on molecular weight control and yield.
Chem Sci
January 2025
Laboratory of Polymeric Materials, Department of Materials, ETH Zurich Vladimir Prelog Weg 5 8093 Zurich Switzerland
The labile end-groups inherent to many controlled radical polymerization methodologies, including atom transfer radical polymerization (ATRP) and reversible addition-fragmentation chain-transfer (RAFT) polymerization, can trigger the efficient chemical recycling of polymethacrylates yielding high percentages of pristine monomer. Yet, current thermal solution ATRP and RAFT depolymerization strategies require relatively high temperatures ( 120-170 °C) to proceed, with slower depolymerization rates, and moderate yields often reported under milder reaction conditions ( lower temperatures). In this work, we seek to promote the low temperature RAFT depolymerization of polymethacrylates regulating the Z-group substitution of dithiobenzoate.
View Article and Find Full Text PDFMultifaceted role of HO in the solvothermal synthesis of green-emitting nitrogen-doped graphene quantum dots.
Chem Sci
January 2025
Instituto de Carboquímica (ICB-CSIC) C/Miguel Luesma Castán 4 E-50018 Zaragoza Spain
Fluorescent nitrogen-doped carbon dots (N-GQDs) with long-wavelength emission properties are of increased interest for technological applications. They are widely synthesized through the solvothermal treatment of graphene oxide (GO) using ,-dimethylformamide (DMF) as a cleaving and doping agent. However, this process simultaneously generates undesired interfering blue-emissive by-products.
View Article and Find Full Text PDFNutritional composition and antioxidant potential of monkey pineapple () fruit pulp and seeds from Cameroon Eastern forests.
Heliyon
January 2025
Research Unit of Biochemistry, Medicinal Plants, Food Sciences and Nutrition, Department of Biochemistry, University of Dschang, P.O. Box 67, Dschang, Cameroon.
The aim of this work was to determine the nutritional value and antioxidant potential of the pulp and seeds of the fruit of grown and consumed in the Eastern Region of Cameroon. The physicochemical and nutritional analyses of the pulp and seeds showed that the water content ranged from 89.33 to 95.
View Article and Find Full Text PDFConversion therapy for unresectable intrahepatic cholangiocarcinoma using gemcitabine plus S-1 combined with PD-1 inhibitors: a case report.
Front Oncol
January 2025
Department of Hepatopancreatobiliary Surgery, The Affiliated People's Hospital of Ningbo University, Ningbo, China.
Intrahepatic cholangiocarcinoma (iCCA) is a highly malignant tumor of the liver and gallbladder, which is usually diagnosed at an advanced stage and the opportunity for surgery is lost. Therefore, conversion therapy is important to convert the iCCA into a resectable state. In recent years, the conversion protocol of immuno-chemotherapy has been applied for advanced liver cancer.
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