Covalent organic frameworks (COFs) consist of monomers arranged in predictable structures with emergent properties. {However|Nevertheless|Nonetheless|Even so|On the other hand|Having said that}, {improved|enhanced} crystallinity, porosity, and {solution|answer|remedy|resolution|option} processability {remain|stay} {major|significant|main|key|big|important} challenges. To this {end|finish}, colloidal COF nanoparticles are {useful|helpful|beneficial|valuable} for mechanistic {studies|research} of nucleation and {growth|development} and {enable|allow} {advanced|sophisticated} spectroscopy and {solution|answer|remedy|resolution|option} processing of thin films. {Here|Right here} we present a {general|common|basic} {approach|method|strategy} to synthesize imine-linked 2D COF nanoparticles and {control|manage|handle} their size by favoring imine polymerization {while|whilst|although|even though|when|though} {preventing|stopping} the nucleation of new particles. The {method|technique|approach|strategy|system|process} yields uniform, crystalline, and high-surface-area particles and is applicable to {several|a number of|numerous|many|various|quite a few} imine-linked COFs. In situ X-ray scattering experiments reveal the nucleation of amorphous polymers, which crystallize {via|by way of|through|by means of} imine exchange processes {during|throughout|in the course of|for the duration of|through} and {after|following|right after|soon after|immediately after|just after} particle {growth|development}, {consistent|constant} with {previous|prior|earlier|preceding} mechanistic {studies|research} of imine-linked COF powders. The separation of particle formation and {growth|development} processes {offers|provides|gives|delivers|presents} {control|manage|handle} of particle size and {may|might|could|may possibly|may well|may perhaps} {enable|allow} {further|additional} improvements in crystallinity {in the|within the|inside the} future. m-PEG12-acid web Ethyl 8-aminoquinoline-3-carboxylate web PMID:23695992
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