Monitoring Dynamics, Structure, and Magnetism of Switchable Metal-Organic Frameworks via ¹ H-Detected MAS NMR.

ABSTRACT: We present a toolbox for the rapid characterisation of powdered samples of paramagnetic metal-organic frameworks at natural abundance by ¹ H-detected solid-state NMR. Very fast MAS rates at room and cryogenic temperatures and a set of tailored radiofrequency irradiation schemes help overcome the sensitivity and resolution limits often associated with the characterisation of MOF materials. We demonstrate the approach on DUT-8(Ni), a framework containing Ni²⁺ paddle-wheel units which can exist in two markedly different architectures. Resolved ¹ H and ¹³ C resonances of organic linkers are detected and assigned in few hours with only 1-2 mg of sample at natural isotopic abundance, and used to rapidly extract information on structure and local intern

SUBMITTER: Blahut J 

PROVIDER: S-EPMC8519119 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature