高产极化 [(107,109)Ag] 配合物的制备及 NMR 特征分析。
Production and NMR characterization of hyperpolarized (107,109)Ag complexes.
机构信息
University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390, USA.
出版信息
Angew Chem Int Ed Engl. 2012 Jan 9;51(2):525-7. doi: 10.1002/anie.201106073. Epub 2011 Oct 13.
Abstract
Both isotopes of silver, (107)Ag and (109)Ag, were simultaneously polarized by dynamic nuclear polarization (DNP), thus allowing large signal enhancements and the NMR characterization of Ag complexes in the millimolar concentration range. Since both isotopes have long relaxation times T(1), the hyperpolarized NMR signal of one isotope could still be observed even after the magnetization of the other isotope had been destroyed by radio-frequency pulses.
摘要
两种银同位素（107Ag 和 109Ag）通过动态核极化（DNP）同时极化，从而允许在毫摩尔浓度范围内对 Ag 配合物进行大信号增强和 NMR 表征。由于两种同位素都具有较长的弛豫时间 T(1)，因此即使另一种同位素的磁化已被射频脉冲破坏，仍可观察到一种同位素的超极化 NMR 信号。
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