Self-assembled trityl radical capsules – implications for dynamic nuclear polarization
نویسندگان
چکیده
منابع مشابه
Polychlorinated trityl radicals for dynamic nuclear polarization: the role of chlorine nuclei.
Polychlorinated trityl radicals bearing carboxylate substituents are water soluble persistent radicals that can be used for dynamic nuclear polarization. In contrast to other trityl radicals, the polarization mechanism differs from the classical solid effect. DFT calculations performed to rationalize this behaviour support the hypothesis that polarization is transferred from the unpaired electr...
متن کاملChiral Microenvironments in Self-Assembled Capsules
A nonracemic compound is synthesized and shown to assemble reversibly through hydrogen bonding to form a cyclic tetramer. The chiral arrangement of atoms in the individual pieces becomes amplified through self-assembly to yield multiple functional groups asymmetrically arranged within the cavity. The tetrameric capsule shows a special affinity for ketones and is able to discriminate between the...
متن کاملSelf-Assembled Capsules of Unprecedented Shapes**
Reversible encapsulation allows the temporary isolation of molecules in very small spaces. There, molecular behavior is quite different than that in bulk solvent; in capsules recognition can be amplified, reactive intermediates can be stabilized, reactions can be accelerated or even catalyzed and new reaction pathways can appear. Accordingly, a multitude of capsules have been devised over the l...
متن کاملRadical-free dynamic nuclear polarization using electronic defects in silicon
M. C. Cassidy,1 C. Ramanathan,2 D. G. Cory,3, 4 J. W. Ager,5 and C. M. Marcus6, 7 School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, USA Department of Chemistry and Institute for Quantum Computing, University of Waterloo, Waterloo ON N2L 3G1, Canada Perimeter Institute for...
متن کاملCross-polarization for dissolution dynamic nuclear polarization.
Dynamic nuclear polarization (DNP) in combination with subsequent dissolution of the sample allows the detection of low-γ nuclei in the solution state with a signal gain of up to tens of thousand times compared to experiments starting from Boltzmann conditions. The long polarization build-up times of typically more than one hour are a drawback of this technique. The combination of dissolution D...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Chemistry Chemical Physics
سال: 2015
ISSN: 1463-9076,1463-9084
DOI: 10.1039/c4cp05225k