PFG NMR技术在固体核磁共振中具有独特的应用优势。传统的固体NMR技术通常难以对固体样品中不同位置处的核自旋进行分辨,因而难以获取关于固体微观结构的详细信息。而PFG NMR技术则能够通过引入脉冲磁场梯度,实现对固体样品中不同位置处的核自旋进行定位和分辨,从而为研究固体样品的微观结构提供了新的思路和手段。在固体NMR...
网络核磁共振脉冲梯度场;核磁共振脉冲梯度场技术 网络释义
PC9水在碳纳米管内快速自扩散的PFGNMR研究刘鑫,韩秀文,潘秀莲,包信和‘(中国科学院大连化学物理研究所,催化国家重点实验室,大连[16023)331碳纳米管是一种准一维的纳米孑L道,由于其具有非常高的长径比,以及特殊的原予级光滑和化学惰性的石墨化孔壁,使得碳纳米管成为扩散研究及相关应用的优异材料1。大量的分子动力学...
pulsed field gradient nuclear magnetic resonance (PFG NMRmulticomponent self-diffusionUsing alternately 1H and 19F NMR, the pulsed field gradient (PFG) method of NMR spectroscopy is applied to study the self-diffusion of water and perfluorobenzene in active carbons of varying pore sizes. The ...
NMR diffusometry and cryoporometry,PFG NMR diffusometry 大意是核磁共振技术测扩散 PFG是梯度
Theoretical or Mathematical/ nuclear magnetic resonance self-diffusion/ pulsed field gradient NMR probe self-diffusion large field gradients molecular migration inhomogeneous magnetic field transverse nuclear magnetization field-gradient methods second field-gradient pulse heterogeneous systems field-gradient pulses...
PFG-NMRself-diffusionSi/Al ratiozeoliteThe understanding of major zeolite applications is partially based on diffusion of molecules inside or outside microporous networks. However, it is still a challenge to measure such phenomena. The diffusion ordered nuclear magnetic resonance spectroscopy (DOSY) ...
This chapter provides an overview of the hardware required in order to conduct PFG NMR applications. Sections include a discussion on permanent magnets and their construction, magnetic field gradients, gradient amplifiers, RF amplifiers, probes and pre-amplifiers and NMR control systems including ...
Since 1974, the field of our scientific interests connects directly to the development of PFG NMR and its applications for the investigation translational mobility in the complicated molecular systems: polymeric solutions and melts, polymeric networks, biological systems, porous media. Size limitations of...
Mass transfer in chromatographic columns studied by PFG NMR - Spin echoes in the presence of a time-dependent field gradientdoi:10.1016/S0730-725X(98)00019-8TransportinporousmediaPackedcolumnsChromatographyPFGNMRPulsed field gradient (PFG) nuclear magnetic resonance (NMR) is applied to study ...