Which process initiates phosphorescence in a metal-ligand complex?

💡 Explanation

Intersystem crossing causes phosphorescence because it allows a transition from a singlet excited state to a triplet state with a longer lifetime, therefore emission persists rather than fluorescence which decays rapidly.

• Which mechanism drastically alters a gallium arsenide varactor diode capacitance?
• Which outcome follows unexpectedly increasing percentage of deuterium isotopes?
• Which outcome accelerates in a black hole when the event horizon radius diminishes?
• Which energy level shift results when two hydrogen atoms approach?
• Which outcome occurs when a semiconductor device drops below the inversion threshold?
• Which consequence results when spatial coherence degrades within a stellar interferometer?