General Strategy to Synthesize Star-Shaped Nanographenes with Controllable Symmetries.

Nanographenes with diverse topological structures have shown enormous potential in fields such as photonics, optoelectronics, and spintronics. This work employs a "from-core-to-branch" strategy to controllably synthesize star-shaped nanographenes with various symmmetries. The obtained star-shaped nanographenes exhibit symmetry-dependent HOMO-LUMO gaps and photoluminescence quantum yields, revealing the importance of precisely controlling the molecular topologies.

Adjustable Self-Assembly of Perchlorate with Nitrogen-Rich Bicyclic Compounds: High-Energy Component Enhances Combustion of Composite Solid Propellants.

Developing energetic compounds with high energy and low sensitivity is a key focus for the progression of civil and military industries. Driven by crystal engineering, the solvent-mediated adjustable self-assembly strategy of perchlorate with nitrogen-rich bicyclic energetic compounds was successfully explored, and three kinds of oxidant-dropped self-assembly energetic compounds (, , and ) were prepared under the guidance of electrostatic potential. Among them, has a high density (1.

Timing matters: pre-assembly post-assembly functionalization of a polyoxovanadate-organic cuboid.

The pre-assembly and post-assembly approaches in the functionalization of a polyoxovanadate-organic cuboid, [{VS}(QPTC){V}], are discussed. We have shown that the two pathways have led to distinctly different systems, with either an expanded or contracted interior void space, when phenylphosphonate is introduced at different stages of the self-assembly. One leaves the cuboid framework largely intact, whereas the other results in a compact, twisted cuboid.