Photoelectron spectroscopy of doubly charged anions: Intramolecular Coulomb repulsion and solvent stabilization
- Washington State Univ., Richland, WA (United States). Dept. of Physics
Photoelectron spectroscopy has been combined with an electrospray ionization technique to study gas-phase multiple charged anions and their intramolecular Coulomb repulsion and solvation stabilization. The authors report an initial study on a series of linear dicarboxylate dianions (DC{sup 2{minus}}), {sup {minus}}O{sub 2}C(CH{sub 2}){sub n}CO{sub 2}{sup {minus}} (n = 3--6), solvated by one and two waters. The second electron binding energy of DC{sup 2{minus}} decreases with decreasing aliphatic chain length owing to the increasing Coulomb repulsion between the two charges; the dianion with n = 2 has a binding energy close to zero and is not stable in the gas phase. The authors found that this dianion can be stabilized by one water, and in general the first water stabilizes the electron binding energy of DC{sup 2{minus}} by {approximately}0.3 eV. The second water, however, was observed to show a much stronger stabilization effect ({approximately}0.6 eV), suggesting that the two waters solvate the two carboxylate groups separately.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 316001
- Journal Information:
- Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory, Vol. 102, Issue 45; Other Information: PBD: 5 Nov 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Intramolecular Coulomb repulsion and anisotropies of the repulsive Coulomb barrier in multiply charged anions
Photoelectron imaging of multiply charged anions:Effects of intramolecular Coulomb repulsion and photoelectron kinetic energies on photoelectron angular distributions