Blood donation is generally considered to be a safe procedure, but occasionally adverse reactions of varying severity may occur predonation, donation, or postdonation phases. Various studies have reported the incidence of adverse donor reaction as 0.6%-5.6%. Donor reactions are classified into mild, moderate, and severe types or immediate and delayed. Although delayed reactions account for <2% of total adverse donor reactions, 27.6% are severe with or without injury. Herein, we report a case of potentially preventable delayed Grade 2 vasovagal reaction in a 56-year-old replacement blood donor.
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http://dx.doi.org/10.4103/ajts.ajts_22_22 | DOI Listing |
J Am Chem Soc
January 2025
Department of Chemistry, The University of Hong Kong, Hong Kong 999077, P. R. China.
Electron donor-acceptor complexes are commonly employed to facilitate photoinduced radical-mediated organic reactions. However, achieving these photochemical processes with catalytic amounts of donors or acceptors can be challenging, especially when aiming to reduce catalyst loadings. Herein, we have unveiled a framework-based heterogenization approach that significantly enhances the photoredox activity of perylene diimide species in radical addition reactions with alkyl silicates by promoting faster and more efficient electron donor-acceptor complex formation.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, 8093 Zürich, Switzerland.
Organic redox systems that can undergo oxidative and reductive (ambipolar) electron transfer are elusive yet attractive for applications across synthetic chemistry and energy science. Specifically, the use of ambipolar redox systems in proton-coupled electron transfer (PCET) reactions is largely unexplored but could enable "switchable" reactivity wherein the uptake and release of hydrogen atoms are controlled using a redox stimulus. Here, we describe the synthesis and characterization of an ambipolar functionalized terthiophene (TTH) bearing methyl thioether and phosphine oxide groups that exhibits switchable PCET reactivity.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Sichuan University, School of Chemical Engineering, No.24 South Section 1, Yihuan Road, 610065, Chengdu, CHINA.
Covalent organic frameworks (COFs) are often employed in oxygen reduction reactions (ORR) for hydrogen peroxide production due to their tunable structures and compositions. However, COF electrocatalysts require precise structural engineering, such as heteroatoms or metal site doping, to modulate the reaction pathway during the ORR process. In this work, we designed a tetraphenyl-p-phenylenediamine based COF electrocatalyst, namely TPDA-BDA, which exhibited excellent two-electron (2e) ORR performance with high H2O2 selectivity of 89.
View Article and Find Full Text PDFChemSusChem
January 2025
Universita degli Studi di Ferrara, Dipartimento di Scienze Chimiche e Farmaceutiche, Via Borsari 46, 44121, Ferrara, ITALY.
Direct photochemical conversion of CO2 into a single carbon-based product currently represents one of the major issues in the catalysis of the CO2 reduction reaction (CO2RR). In this work, we demonstrate that the combination of an organic photosensitizer with a heptacoordinated iron(II) complex allows to attain a noble-metal-free photochemical system capable of efficient and selective conversion of CO2 into CO upon light irradiation in the presence of N,N-diisopropylethylamine (DIPEA) and 2,2,2-trifluoroethanol (TFE) as the electron and proton donor, respectively, with unprecedented performances (ΦCO up to 36%, TONCO > 1000, selectivity > 99%). As shown by transient absorption spectroscopy studies, this can be achieved thanks to the fast rates associated with the electron transfer from the photogenerated reduced dye to the catalyst, which protect the dye from parallel degradation pathways ensuring its stability along the photochemical reaction.
View Article and Find Full Text PDFInorg Chem
January 2025
Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States.
The isolation of nucleophilic boron bases has led to a paradigm shift in boron chemistry. Previous studies of the bis(carbene) borylene complexes revealed that these compounds possess strong donor abilities, and their reaction inertness is due to the large steric hindrance between boron reagents and reactant. In the present study, we have theoretically studied the [(N)BX] and [(N)BX] compounds (X = H, F, Cl, Br).
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