Absorption Spectra of 4-Nitrophenolate Ions Measured in Vacuo and in Solution (pages 1207–1209)
Maj-Britt Suhr Kirketerp, Michael Åxman Petersen, Marius Wanko, Leonardo Andres Espinosa Leal, Henning Zettergren, Françisco M. Raymo, Angel Rubio, Mogens Brøndsted Nielsen and Steen Brøndsted Nielsen
Version of Record online: 2 APR 2009 | DOI: 10.1002/cphc.200900174
From blue to red: While four π-conjugated nitrophenolates absorb within a relatively narrow region in solution, they cover the entire visible spectrum when isolated in vacuo (see picture). The work combines gas- and solution-phase spectroscopy and provides the first benchmark of theoretical excitation energies for nitrophenolates.