The key discovery is that in certain types of coordination complexes based on carbene ligands the excited singlet state sinks below the excited triplet state during molecular rotation
Mechanistic studies investigate enhanced emission through restriction of molecular rotation
, crystallization, and fluorescence spectroscopy.
It should be pointed out that this constant is not compatible with conventional theory of molecular rotation
This includes the region that will affect molecular rotation
, though the preferred frequency of 2,450 MHz chosen by some microwave instrumentation manufacturers falls below any of the rotational transitions that will occur in molecules.
But as viscosity increases during cure, the dye molecules' freedom of molecular rotation