Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization - Archive ouverte HAL Access content directly
Journal Articles Chemical Science Year : 2016

Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization

Abstract

A series of 37 dinitroxide biradicals have been prepared and their performance studied as polarizing agents in cross-effect DNP NMR experiments at 9.4 T and 100 K in 1,1,2,2-tetrachloroethane (TCE). We observe that in this regime the DNP performance is strongly correlated with the substituents on the polarizing agents, and electron and nuclear spin relaxation times, with longer relaxation times leading to better enhancements. We also observe that deuteration of the radicals generally leads to better DNP enhancement but with longer build-up time. One of the new radicals introduced here provides the best performance obtained so far under these conditions.
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Dates and versions

hal-01387080 , version 1 (25-10-2016)

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Dominik J Kubicki, Gilles Casano, Martin Schwarzwälder, Sebastien ´ Abel, Claire ´ Sauvée, et al.. Rational design of dinitroxide biradicals for efficient cross-effect dynamic nuclear polarization. Chemical Science, 2016, 7 (1), pp.550 - 558. ⟨10.1039/C5SC02921J⟩. ⟨hal-01387080⟩
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