From Cryogenic to RT: Advances in DNP-MAS for Materials Characterization | Dr Yao Fu | Session 124

During the 124th session of the Global NMR Discussion Meetings held on June 16th, 2026, via Zoom, Dr Yao Fu from Fudan University, China, gave a talk on the topic "From Cryogenic to Room Temperature: Advances in DNP-MAS for Materials Characterization". The recording serves as a tutorial. Find out more about Dr Yao Fu's research : http://hyperfun.cn Abstract: This presentation highlights recent advances in Dynamic Nuclear Polarization (DNP)-enhanced solid-state NMR spanning temperatures from cryogenic (30-100 K) to ambient conditions. At cryogenic temperatures, cross-effect DNP was applied to a range of material systems, including SiO₂ nanoparticle-polymer composites, conductive mesoporous polymers, and the metal-organic framework (MOF) UiO-66. In UiO-66, DNP-enhanced NMR revealed previously unrecognized water-induced structural rearrangements, in which water molecules reversibly replace coordinating linkers to form hydrogen-bond-stabilized dangling groups. To overcome limitations associated with exogenous polarizing agents and low-temperature operation, room-temperature Overhauser DNP was explored in trityl radical thin films relevant to OLED technologies. Efficient polarization transfer and site-resolved measurements of electron delocalization were achieved under ambient conditions. Together, these studies illustrate the evolution of DNP methodologies across a broad temperature range and highlight their growing potential for investigating increasingly complex and technologically relevant material systems. Content of this video : 00:00 - 41:17 - 41:18 - 54:54 Q&A Current organizers: Adrian Draney (Creighton Uni.) Asif Equbal (New York Uni., Abu Dhabi) Charlotte Bocquelet (HMRLab, CRMN Lyon) Diganta Sarkar (CEA Grenoble) Julie Buhl Kaasen (Uni. JKU Linz) Marcel Levien (Emsley Lab, EPFL) Mengshan Ye (Vanderbilt Uni.) Mouzhe Xie (Arizona State Uni.) Nikita Rao (Indian Institute of Science, Bangalore) Nesreen Elathram (Debelouchina Lab, UCSD) Tamali Nag (Uni. of Lille/Grenoble)