Abstract
The quenching rate constant of 2-methylnaphthalene (2 MN) with triethylamine (TEA) and N-methylpiperidine (NMP) in a polar protic solvent is found to be less than diffusion controlled. In a non polar solvent the exciplex stabilisation and entropy of formation indicate a tighter bound complex for the 2 MN-TEA system than for 2 MN-NMP. Both observations are interpreted as arising from geometric restrictions in the approach of the amine to the excited 2-methylnaphthalene.
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