New, stable β??phosphorus??labelled pyrrolidine nitroxides from nitrones for magnetometry: an ESR investigation

…, EG Janzen, G Chen, VJ Robinson…

Index: Haire, D. Lawrence; Janzen, Edward G.; Chen, Guoman; Robinson, Valerie J.; Hrvoic, Ivan Magnetic Resonance in Chemistry, 1999 , vol. 37, # 4 p. 251 - 258

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Citation Number: 14

Abstract

Abstract The present study was devoted to the design and synthesis of new, prototypical nitroxides for use in dynamic nuclear polarization (DNP) magnetometers. Specifically, eight β-phosphorylated pyrrolidine nitroxides were synthesized. Their large (ca. 5.0 mT) β-31 P hyperfine splittings render them desirable for magnetometry applications. Seven of these free radicals are 2-dialkylphosphityl-2, 5, 5-trialkyl-or 2-diarylphosphityl-2, 5, 5- ...