Our recent publication in JACS Au showcased a remarkable study on the selective binding of (Bipyridine)3Ru(II) vis-à-vis (Phenanthroline)3Ru(II) complexes.
We introduced multianionic trimeric cyclophane receptors with an extraordinary ability to distinguish between two closely related targets. These receptors exhibit an unparalleled capacity to selectively bind the highly versatile (Bipyridine)3Ru(II) complex while excluding the nearly identical (Phenanthroline)3Ru(II) complex. Notably, these receptors can also undergo redox-switching to release the guest molecule.
The significance of this research extends beyond selective binding. These receptors open up avenues for precise control of applications such as photocatalysis and luminescent sensing by selectively exposing or concealing (Bipyridine)3Ru(II) complexes. Essentially, a discrete molecular host can now select, pick up, and drop off a 3D nanometric object, enabling unprecedented control over the applications of (Bipyridine)3Ru(II) complexes.
Moreover, these multianionic receptors serve as protective shields for the excited states of these metal complexes, safeguarding them from quenchers like phenolates. This unique property significantly delays the initial step in photocatalytic phenolate oxidation, providing an innovative avenue for controlling and enhancing catalytic processes.