Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 120, Issue 1, Pages 18-24Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcb.5b08741
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- Chemistry Department at Clemson University
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The aromatic free radical BDPA (alpha,gamma-bisdiphenylene-beta-phenylallyl), which has been widely used as a polarizing agent for Dynamic Nuclear Polarization (DNP) of hydrophobic analytes, has been incorporated into nanometer-scale polystyrene latex beads. We have shown that the resulting BDPA-doped beads can be used to hyperpolarize C-13 and Li-7 nuclei in aqueous environments, without the need for a glassing cosolvent. DNP enhancement factors of between 20 and 100 were achieved with overall BDPA concentrations of 2 mM or less. These Highly-Effective Polymer/Radical Beads (HYPR-beads) have potential use as an inexpensive polarizing agent for water-soluble analytes, and also have applications as model nanoparticles in DNP studies.
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