The iridium compound loses a pyridine molecule to form a simpler structure that helps transfer polarization during the SABRE process.

A special iridium compound can make NMR signals much stronger for certain molecules like pyridine by using hydrogen gas, making it easier to detect these molecules in scientific tests.

The iridium compound has parts that move around quickly at room temperature, with pyridine molecules leaving at about 8 times per second and hydrogen atoms swapping positions about 3.6 times per second.

A different iridium compound doesn't work well for hyperpolarization at room temperature because it holds onto pyridine too tightly, but it shows a little activity when warmed up.

This iridium compound is easy to make, stable in air, and works better for hyperpolarization than the more complicated carbene-based catalysts usually used for this purpose.

The binuclear iridium compound doesn't work for hyperpolarization by itself, but when mixed with the active catalyst, it can help transfer polarization to pyridine molecules.