Gas-sorption properties of cobalt(II)--carborane-based coordination polymers as a function of morphology.

Coordination-polymer materials represent a rapidly growing area in modern chemistry and materials science. These structures can now be made in many forms, including crystalline metal–organic frameworks (MOFs) and welldefined (in terms of size and shape) infinite-coordinationpolymer (ICP) nanoand microparticles. These materials show promise in many applications, including catalysis, gas storage, separation processes, ion exchange, smallmolecule detection, drug delivery, and optoelectronics. The properties of the coordination polymers and, therefore, their potential for application can be highly dependent on bulk and microscopic structure, yet little has been done to compare and contrast one set of structures as a function of morphology and particle size. Thus far, much more attention has been devoted to the study of crystalline macroscopic MOFs than to other potential morphologies of coordination-polymer materials. Indeed, only a handful of reports involve adsorption studies of amorphous metal–organic microparticles, semicrystalline materials, and nanostructures. Interestingly however, none of these studies address how the gas-sorption properties of one class of coordination polymer depend on morphology. Understanding the differences in the gas-uptake