Preparation of Boronate Submicroparticles

This result was unprecedented, because normal dehydration between the components in toluene/10% methanol under reflux in a Dean-Stark apparatus provided no nueleation. The average diameter of the submicrospheres was estimated to be 870 100 nm, based on field-emission scanning electron microscopy (FE-SEM) images of 1000 particles. Spectroscopic analysis using 

Subsequent pyridine-assisted polymerization induced a solvophobic orthogonal interaction, based on phenyl-boron-phenyl jt-stacking, leading to dispersible nucleation. On aggregation, pyridine-coordinated boronate ester polymers are converted into planar structures via elimination of pyridine, because the trigonal planar state of the boronate ester is thermodynamically favoured over the pyridine-coordinated tetrahedral structure. As a result, spherical particles composed of lamellar nanostructures are produced, and their size depends on the minimization of interfacial free energy 

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