Naslov
Single-Photon, Double Photodetachment of Nickel Phthalocyanine Tetrasulfonic Acid 4- Anions

Autori
Daly, Steven ; Girod, Marion ; Vojkovic, Marin ; Giuliani, Alexandre ; Antoine, Rodolphe ; Nahon, Laurent ; O’Hair, Richard A. J. ; Dugourd, Philippe

Izvornik
The Journal of Physical Chemistry Letters (1948-7185) 7 (2016), 13; 2586-2590

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Anions ; Binding energy ; Electrical energy ; Kinetics ; Photodetachment

Sažetak
Single-photon, two-electron photodetachment from nickel phthalocyanine tetrasulfonic acid tetra anions, [NiPc]4–, was examined in the gas-phase using a linear ion trap coupled to the DESIRS VUV beamline of the SOLEIL Synchrotron. This system was chosen since it has a low detachment energy, known charge localization, and well-defined geometrical and electronic structures. A threshold for two-electron loss is observed at 10.2 eV, around 1 eV lower than previously observed double detachment thresholds on multiple charged protein anions. The photodetachment energy of [NiPc]4– has been previously determined to be 3.5 eV and the photodetachment energy of [NiPc]3-• is determined in this work to be 4.3 eV. The observed single photon double electron detachment threshold is hence 5.9 eV higher than the energy required for sequential single electron loss. Possible mechanisms are for double photodetachment are discussed. These observations pave the way toward new, exciting experiments for probing double photodetachment at relatively low energies, including correlation measurements on emitted photoelectrons.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Interdisciplinarne prirodne znanosti

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