The existence of multiple stable states in breathing MOFs has led to a variety of selective sorption applications and, therefore, an increased interest in their design and synthesis.  We are utilizing semi-rigid ligands to design breathing MOFs which place the hinges or �kneecap� solely on the ligand rather than the metal-ligand interface.  Placing the �kneecap� on the ligand allows for a new approach to breathing in which an aryl moiety of the linker can rotate between fixed positions to open and close the pore as a function of guest.  An additional advantage for this breathing mechanism is that the rotating subunit can be monitored directly by solid state NMR.  Progress in the design and synthesis of a series of these anisotropic MOFs will be discussed.

Rotating linkers as a guest-dependent breathing mechanism in anisotropic MOFs

247th National Meeting (2014)

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