报告题目：Solid-state NMR of organic molecules

报告人：Yusuke Nishiyama博士（日本理化学研究所）

邀请人：张荣纯副研究员

时间：2018年8月15日（星期三）下午15:30

地点：华南软物质科学与技术高等研究院（北区科技园2号楼）324报告厅

欢迎广大师生踊跃参加。

华南软物质科学与技术高等研究院

2018年7月29日

报告摘要：

　　NMR is widely used method to elucidate the atomic level structure and dynamics. However, the NMR spectra of rigid solids give featureless broad signals because of presence of anisotropic interactions, hampering widespread applications. These broadening can be removed by spinning the sample at the magic angle, i.e. magic angle spinning (MAS). Since the invention of MAS, solid-state NMR becomes widely used to obtain atomic level information of nonsoluble and noncrystalline samples of any shape and size.

First, we will demonstrate the idea of MAS and discuss the typical applications to organic polymers. The detailed structure of polyethylene can be obtained from a single one-dimensional NMR spectrum. The change in molecular dynamics below and above the glass transition temperature can also be very easily observed.

Second, we will introduce the cutting edge MAS technology and its applications. While MAS rates are typically limited to 10 – 20 kHz, the cutting edge technology enables the ultrafast MAS NMR (~120 kHz). Such a fast MAS opens a new avenue to structural elucidation of organic molecules. Some recent results will be introduced.

报告人简介：

Dr. Yusuke Nishiyama is currently unit leader of nano-crystallography unit of RIKEN-JEOL Collaboration Center (Japan) and researcher in JEOL RESONANCE Inc. He received his Ph.D. In 2002 from Kyoto University where he worked on solid-state NMR methodology development of oriented materials with Prof. Takehiko Terao. After obtaining Ph.D., he moved to RIKEN Genomic Sciences Center as a postdoc and worked on general theory to manipulate spin Hamitonian with Dr. Toshio Yamazaki. In 2007, he joined JEOL Ltd. as a researcher and is involved in various aspects of solid-state NMR including hardware development, implementing new software, application to material, chemical, biological sciences, etc. From 2014, he is concurrently appointed as a unit leader at RIKEN-JEOL Collaboration Center in order to focus on academic research. His interest is methodological development and application of solid-state NMR, especially very fast MAS techniques > 100 kHz. He has published more than 80 peer reviewed article in international journals.