期刊
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
卷 63, 期 -, 页码 -出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2022.101663
关键词
Crystallization; Spectroscopy; Nuclear magnetic resonance; NMR; Hyperpolarization; Dynamic nuclear polarization; DNP; Sensitivity; Prenucleation; In-situ; Ex-situ; Snapshot
This paper reviews the recent progress of Nuclear Magnetic Resonance (NMR) in investigating crystallization processes. It discusses the use of in-situ and ex-situ strategies combining cryogenic conditions with dynamic nuclear polarization (DNP) NMR to study the formation of intermediate phases during crystallization. The increased temporal and structural resolution enabled the detection of previously elusive transient forms.
Crystallization underpins essential processes in our everyday life, creating exceptional materials. Yet, fundamental under-standing of the mechanisms underlying crystallization pro-cesses is still lacking because of the scarcity of experimental approaches allowing atomic-level investigation of the sequence of intermediate phases formed during crystallization as a function of time. We review recent progress of Nuclear Magnetic Resonance (NMR) in tackling this challenge across the last four years. New in-situ and ex-situ strategies are discussed, in which cryogenic conditions are combined with dynamic nuclear po-larization (DNP) NMR to monitor crystallization. Under these conditions, both the temporal and structural resolution of the analysis increase, enabling the detection of - previously elusive - transient forms. We conclude with suggestions of future directions that could extend the capabilities of NMR even further, bringing key mechanistic details of crystallization process that could expand our fundamental understanding of crystallization and improve control over crystallization outcome.
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