Jet spectroscopy of van der Waals dimers of 1-methoxynaphthalene: A laser induced fluorescence study

Using fluorescence excitation, dispersed fluorescence, and hole-burning spectroscopy, it was shown that 1-methoxynapthalene forms two isomeric dimers in the cold environment of a supersonic jet. Unlike the case of naphthalene, both the isomeric dimers of 1-methoxynaphthalene exhibited sharp transitions in the fluorescence excitation spectra. Following light absorption to the S₁ electronic state, the dimers emitted excimer emission. The dynamical characteristics for transition from the locally excited to the excimer states of the two dimers were different.