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A novel nitroamine/energetic ionic salt cocrystal explosive containing CL-20 and 1-AMTN in a 1 : 1 molar ratio is presented. The structure of this cocrystal is determined by single-crystal X-ray diffraction (SC-XRD). The predicted detonation performance is slightly higher than that of RDX, a state-of-the-art explosive. In small-scale impact drop tests, the cocrystal exhibits a surprisingly low sensitivity relative to CL-20. These features make this cocrystal a very promising explosive to replace RDX. [ABSTRACT FROM AUTHOR]

Covalent organic frameworks (COFs) are a new class of functional solids featuring several fantastic structural characteristics, including a great diversity of building units and cross-linking patterns, precise integration of building blocks, and adjustable topology of porous architecture. In addition to the above features, some COF samples are constructed with high-density conjugated fragments, which have unique potential advantages in fluorescence imaging, and thus may have great potential applications in bioimaging. Herein, this article summarizes the recent progress in the design and preparation of fluorescent covalent organic frameworks. We investigate the systemic correlation between the structural qualities of COF networks and biological sensors. Finally, the significant advantages, major challenges, and future opportunities of fluorescent covalent organic frameworks are discussed for the development of next-generation porous materials for sensing applications. [ABSTRACT FROM AUTHOR]