title: Infrared multiphoton spectra from metal dication complexes in the gas phase.
abstract: Infrared multiphoton spectra have been recorded for the first time from metal dication complexes held in an ion trap. The photofragmentation of [M(pyridine)4]2+ complexes has been observed in the range 920-1090 cm(-1) and for M=Cu2+, Mg2+ and Zn2+. The narrow absorption features are identified as vibrational modes of the pyridine molecule and comparisons with calculations suggest that the Mg2+ and Zn2+ ion complexes have D2d (compressed tetrahedron) structures, and that the Cu2+ complex is probably square-planar (D4h).
authors.affiliation: Department of Physical Chemistry, School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.
authors.forename: Guohua
authors.initials: G
authors.lastname: Wu
authors.forename: Jingang
authors.initials: J
authors.lastname: Guan
authors.forename: Georgina D C
authors.initials: GD
authors.lastname: Aitken
authors.forename: Hazel
authors.initials: H
authors.lastname: Cox
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Stace