Strong 31P nuclear spin hyperpolarization produced via reversible chemical interaction with parahydrogen

Abstract

Substantial ³¹P NMR signal enhancement of more than two orders of magnitude at 7 T for free and bound PPh₃ species was observed under reversible interaction of (PPh₃)₃Ir(H₂)Cl with parahydrogen. The large improvement in sensitivity made single-shot ³¹P NMR imaging of a model object possible. The observed effects are temperature and magnetic field dependent as shown experimentally and theoretically.