Photodissociation Spectrum of Naphthalene Dimer Cation

Abstract

The electronic spectrum of (CloH8)2+ is obtained in the 455-1400 nm region by applying photodissociation spectroscopy to the ion produced by the laser-induced plasma technique. The spectrum shows a local excitation band at 580 nm and a charge resonance band at 1180 nm. The locations of these bands coincide with those reported for intramolecular dimer cations of dinaphthylpropanes with a partially overlapped conformation, suggesting that (ClOHg)2+ has a similar conformation in the gas phase.

Infrared spectroscopy of CH stretching vibrations of jet-cooled alkylbenzene cations by using the “messenger” technique

“…The blueshift of the aromatic CH stretches upon the ionization gives an interesting suggestion for the interpretation of the IR spectrum of the (benzene) 3 ϩ cluster cation, which was reported by Inokuchi et al 9 The (benzene) 3 ϩ cation has the triple sandwich structure with the dimer ion core. Inokuchi et al found a strong IR absorption band at 2986 cm Ϫ1 , and they attributed it to the CH stretch in the dimer ion core.…”

Photoelectron spectroscopy of naphthalene cluster anions

“…While the charge resonance stabilized, naphthalene dimer cation is thought to possess a structure with cofacial moieties that partially overlap, 29 the geometry of the naphthalene dimer anion can be totally different, as, for instance, in a nonparallel structure with little orbital overlap. We carried out a cursory ab initio calculation that showed that the binding energy of a neutral T-shaped naphthalene dimer is as large as 70% of that of a cofacial dimer.…”

“…[25][26][27][28][29][30][31][32][33][34][35][36] Charge resonance is well known in several aromatic homogeneous dimer cations, where it is characterized by extra stabilization, unique absorption bands, and a charge distribution in which the excess positive charge is evenly distributed over the two aromatic moieties. [25][26][27][28][29][30][31][32][33][34][35][36] Charge resonance is well known in several aromatic homogeneous dimer cations, where it is characterized by extra stabilization, unique absorption bands, and a charge distribution in which the excess positive charge is evenly distributed over the two aromatic moieties.…”

Positive charge distribution in (benzene)1(toleune)2+ and (benzene)2(toluene)1+ studied by photodissociation spectroscopy

“…An analogous CR band is observed also for (toluene͒ 2 ϩ and ͑naphthalene͒ 2 ϩ . 10,11 For these ions, the principal intermolecular interaction is the CR interaction between the -electrons of the aromatic molecules. As seen in Fig.…”