Kinetic Studies on the Formation of Two Intramolecular Excimers in Substituted Dinaphthylpropanes

Article abstract of DOI:10.1021/ja00380a024

The emission properties of 1,3-bis(4-methoxy-1-naphthyl)propane (BMNP) and 1,3-bis(4-hydroxy-1-naphthyl)propane (BHNP) have been investigated in fluid solution.They exhibit, in addition to the monomer fluorescence, two structureless emissions derived from two different types of excimer: a normal excimer and a second excimer, the latter having a partially overlapping structure of aromatic rings.The kinetic analysis of transient decay curves for the fluorescence of BMNP showed that the second excimer is not formed from or converted to the normal excimer and that the two are formed independently from the excited monomer.Some activation energies and rate constants were determined.The activation energy for the second excimer formation was found to be smaller than that of the normal excimer formation.