Julia Darcy

Journal article Neurogastroenterol Motil · January 2025 BACKGROUND: Patients' report of bowel movement consistency is unreliable. We demonstrate the feasibility of long-term automated stool image data collection using a novel Smart Toilet and evaluate a deterministic computer-vision analytic approach to assess ... Full text Link to item Cite

Base-Directed Photoredox Activation of C-H Bonds by PCET

Journal article Journal of Organic Chemistry · June 5, 2020 Photoredox catalysis using proton-coupled electron transfer (PCET) has emerged as a powerful method for bond transformations. We previously employed traditional chemical oxidants to achieve multiple-site concerted proton-electron transfer (MS-CPET) activat ... Full text Cite

Transition State Asymmetry in C-H Bond Cleavage by Proton-Coupled Electron Transfer.

Journal article Journal of the American Chemical Society · July 2019 The selective transformation of C-H bonds is a longstanding challenge in modern chemistry. A recent report details C-H oxidation via multiple-site concerted proton-electron transfer (MS-CPET), where the proton and electron in the C-H bond are transferred t ... Full text Cite

A Continuum of Proton-Coupled Electron Transfer Reactivity.

Journal article Accounts of chemical research · October 2018 Proton-coupled electron transfer (PCET) covers a wide range of reactions involving the transfer(s) of electrons and protons. The best-known PCET reaction, hydrogen atom transfer (HAT), has been studied in detail for more than a century. HAT is generally de ... Full text Cite

A new strategy to efficiently cleave and form C-H bonds using proton-coupled electron transfer.

Journal article Science advances · July 2018 Oxidative activation and reductive formation of C-H bonds are crucial in many chemical, industrial, and biological processes. Reported here is a new strategy for these transformations, using a form of proton-coupled electron transfer (PCET): intermolecular ... Full text Cite

Nondirected, cu-catalyzed sp3 C-H aminations with hydroxylamine-based amination reagents: Catalytic and mechanistic studies

Journal article Organometallics · April 10, 2017 This work demonstrates the use of hydroxylamine-based amination reagents RSO2NH-OAc for the nondirected, Cu-catalyzed amination of benzylic C-H bonds. The amination reagents can be prepared on a gram scale, are benchtop stable, and provide benzy ... Full text Cite

Rare Earth Recycling: Forecast of Recoverable Nd from Shredder Scrap and Influence of Recycling Rates on Price Volatility

Journal article Journal of Sustainable Metallurgy · September 1, 2015 This manuscript quantifies the recoverability of the rare earth (RE) element neodymium from shredder scrap during the next two decades and provides a forecast of recycling rates until 2034 based on these calculations. In combination with this forecast, an ... Full text Cite

Protonation and Proton-Coupled Electron Transfer at S-Ligated [4Fe-4S] Clusters.

Journal article Chemistry (Weinheim an der Bergstrasse, Germany) · June 2015 Biological [Fe-S] clusters are increasingly recognized to undergo proton-coupled electron transfer (PCET), but the site of protonation, mechanism, and role for PCET remains largely unknown. Here we explore this reactivity with synthetic model clusters. Pro ... Full text Cite

Closing the lifecycle of rare earth magnets: Discovery of neodymium in slag from steel mills

Journal article Energy Technology · February 1, 2015 Analysis of slag from steel mini-mills reveals that substantial amounts of the rare earth element neodymium (Nd, an average of 0.032wt% in the tested samples) are present in this waste product. This provides insight into a currently unknown part of the rar ... Full text Cite

Value analysis of neodymium content in shredder feed: toward enabling the feasibility of rare earth magnet recycling.

Journal article Environmental science & technology · June 2014 In order to facilitate the development of recycling technologies for rare earth magnets from postconsumer products, we present herein an analysis of the neodymium (Nd) content in shredder scrap. This waste stream has been chosen on the basis of current bus ... Full text Cite