Hope Michael A, Halat David M, Magusin Pieter C M M, Paul Subhradip, Peng Luming, Grey Clare P
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
DNP MAS NMR Facility, Sir Peter Mansfield Magnetic Resonance Centre, University of Nottingham, Nottingham, NG7 2RD, UK.
Chem Commun (Camb). 2017 Feb 9;53(13):2142-2145. doi: 10.1039/c6cc10145c.
Surface-selective direct O DNP has been demonstrated for the first time on CeO nanoparticles, for which the first three layers can be distinguished with high selectivity. Polarisation build-up curves show that the polarisation of the (sub-)surface sites builds up faster than the bulk, accounting for the remarkable surface selectivity.
首次在CeO纳米颗粒上证明了表面选择性直接光抽运动态核极化，对于这种纳米颗粒，其前三层可以以高选择性区分。极化建立曲线表明，（亚）表面位点的极化比体相建立得更快，这说明了显著的表面选择性。
