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Journal Article
Research Support, Non-U.S. Gov't
Design of a 15 N Molecular Unit to Achieve Long Retention of Hyperpolarized Spin State.
Scientific Reports 2017 January 10
Nuclear hyperpolarization is a phenomenon that can be used to improve the sensitivity of magnetic resonance molecular sensors. However, such sensors typically suffer from short hyperpolarization lifetime. Herein we report that [15 N, D14 ]trimethylphenylammonium (TMPA) has a remarkably long spin-lattice relaxation time (1128 s, 14.1 T, 30 °C, D2 O) on its 15 N nuclei and achieves a long retention of the hyperpolarized state. [15 N, D14 ]TMPA-based hyperpolarized sensor for carboxylesterase allowed the highly sensitive analysis of enzymatic reaction by 15 N NMR for over 40 min in phophate-buffered saline (H2 O, pH 7.4, 37 °C).
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