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← ScienceWhich outcome accelerates when vibrational mode functions of a triatomic molecule increasingly overlap?
A)Increased rate of internal conversion✓
B)Decreased phosphorescence quantum efficiency
C)Enhanced radiative decay lifetimes
D)Reduced intersystem crossing probability
💡 Explanation
Increased overlap leads to accelerated internal conversion because the **Born-Oppenheimer approximation** fails, therefore electronic energy dissipates as vibrational energy faster, rather than slower emission processes occurring due to less efficient energy transfer to other pathways.
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