Question

Why increase in the viscosity causes increased fluorescence?

Answer 1

Hey there !

Quantum efficiency of Fluorescencedecreases with increasingtemperature. As the temperatureincreases, the frequency of the collision increases which increasesthe probability of deactivation by external conversion. Solvents with lower viscosity have higher possibility of deactivation by external conversion.

Hope it helps you !

Answer 2

hey guys this happens because fluorescence is directly proportional to velocity.......
please mark my answer as branialist answer......