When this iridium compound is used with special hydrogen gas, it can make NMR signals for pyridine much stronger—over 200 times stronger in some cases.

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.

When this iridium compound is exposed to special hydrogen gas, its hydrogen atoms show enhanced signals in NMR tests, which is a sign of polarization transfer.

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.

The binuclear iridium compound can swap hydrogen atoms in pyridine molecules at specific rates, with the ortho position exchanging fastest.