Nathan C. Flanders

TL;DR: Two-dimensional covalent organic frameworks (2D COFs) offer broad monomer scope but are generally isolated as powders comprising aggregated nanometer-scale crystallites, but it is found that 2D COF formation could be controlled using a two-step procedure in which monomers are added slowly to preformed nanoparticle seeds, which should enable a broad exploration of synthetic 2D polymer structures and properties.

TL;DR: This work reports a general, scalable method to exfoliate two-dimensional imine-linked COF powders by temporarily protonating their linkages, and demonstrates that the film fabrication process proceeds through a partial depolymerization/repolymerized mechanism, providing mechanically robust films that can be easily separated from their substrates.

TL;DR: It is shown that cesium lead bromide nanocrystals experience a reversible orthorhombic-to-cubic phase transition at moderate excitation fluences and become amorphous at higher fluences, demonstrating that light-driven phase transitions occur in perovskite materials.

TL;DR: Highly crystalline, monodisperse, imine-linked covalent organic framework nanoparticles were obtained under Sc(OTf)3-catalyzed conditions and enlarged by a slow monomer addition technique that prevents secondary nucleation.

TL;DR: In situ grazing-incidence wide-angle X-ray scattering is used to monitor film formation during spin-coating and outlines the primary causes of phase distribution and perpendicular orientation in 2D perovskite films and paves the way for rationally designed film fabrication techniques.