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An efficient quantum mechanical method for radical pair recombination reactions [PDF]
The Journal of Chemical Physics, 2016 The standard quantum mechanical expressions for the singlet and triplet survival probabilities and product yields of a radical pair recombination reaction involve a trace over the states in a combined electronic and nuclear spin Hilbert space. If this trace is evaluated deterministically, by performing a separate time-dependent wavepacket calculation ...
Alan M. Lewis +2 more
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Exploration of the close chemical space of tryptophan and tyrosine reveals importance of hydrophobicity in CW-photo-CIDNP performances [PDF]
Magnetic Resonance, 2021 Sensitivity being one of the main hurdles of nuclear magnetic resonance (NMR) can be gained by polarization techniques including chemically induced dynamic nuclear polarization (CIDNP).
F. Torres, A. Renn, R. Riek
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Frontiers in Oncology, 2021 Electromagnetic fields (EMF) raise intracellular levels of reactive oxygen species (ROS) that can be toxic to cancer cells. Because weak magnetic fields influence spin state pairing in redox-active radical electron pairs, we hypothesize that they disrupt
Martyn A. Sharpe +17 more
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Radical triads, not pairs, may explain effects of hypomagnetic fields on neurogenesis.
PLoS Computational Biology, 2022 Adult hippocampal neurogenesis and hippocampus-dependent cognition in mice have been found to be adversely affected by hypomagnetic field exposure. The effect concurred with a reduction of reactive oxygen species in the absence of the geomagnetic field ...
Jess Ramsay, Daniel R Kattnig
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The Two Faces of the Guanyl Radical: Molecular Context and Behavior
Molecules, 2021 The guanyl radical or neutral guanine radical G(-H)• results from the loss of a hydrogen atom (H•) or an electron/proton (e–/H+) couple from the guanine structures (G). The guanyl radical exists in two tautomeric forms.
Chryssostomos Chatgilialoglu
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Entangled radicals may explain lithium effects on hyperactivity
Scientific Reports, 2021 It is known that bipolar disorder and its lithium treatment involve the modulation of oxidative stress. Moreover, it has been observed that lithium’s effects are isotope-dependent.
Hadi Zadeh-Haghighi, Christoph Simon
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Spin polarization transfer by the radical pair mechanism
The Journal of Chemical Physics, 2015 In a three-site representation, we study a spin polarization transfer from radical pair spins to a nearby electron or nuclear spin. The quantum dynamics of the radical pair spins is governed by a constant exchange interaction between the radical pair spins which have different Zeeman frequencies.
Mehdi, Zarea +2 more
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How Important Are Radical Mechanisms in Frustrated Lewis Pair Chemistry? [PDF]
Chem, 2017 Reaction mechanism is the foundation of understanding chemical reactivity. In this issue of Chem , Stephan and co-workers overturn long-held assumptions regarding the reactivity of frustrated Lewis pairs by providing compelling evidence that radical mechanisms might operate in some cases.
Hamilton, Hugh B., Wass, Duncan F.
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Magnetic isotope effects: a potential testing ground for quantum biology
Frontiers in Physiology, 2023 One possible explanation for magnetosensing in biology, such as avian magnetoreception, is based on the spin dynamics of certain chemical reactions that involve radical pairs.
Hadi Zadeh-Haghighi +5 more
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Magnetic Field Intervention Enhances Cellular Migration Rates in Biological Scaffolds
Bioengineering, 2023 The impact of magnetic fields on cellular function is diverse but can be described at least in part by the radical pair mechanism (RPM), where magnetic field intervention alters reactive oxygen species (ROS) populations and downstream cellular signaling.
Amy M. Vecheck +3 more
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