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Investigation of the Q x –Q y Equilibrium in a Metal‐Free Phthalocyanine
Author(s) -
Baeten Yannick,
Fron Eduard,
Ruzié Christian,
Geerts Yves Henri,
Van Der Auweraer Mark
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500386
Subject(s) - phthalocyanine , excited state , fluorescence , metal , femtosecond , transition metal , chemistry , absorption (acoustics) , ultrafast laser spectroscopy , analytical chemistry (journal) , photochemistry , absorption spectroscopy , materials science , atomic physics , laser , optics , organic chemistry , physics , composite material , catalysis
Phthalocyanines (Pcs) have attracted a lot of interest as small molecules for organic electronics. However, some excited‐state properties of metal‐free phthalocyanines, as for example, the dynamics of the transition between the nondegenerate Q x and Q y states in a metal‐free phthalocyanine, have not been fully established. This effect results in a blue‐shifted shoulder with low intensity in the Pc fluorescence spectrum. This shoulder was suggested to be related to emission from the more energetic Q y state. By using ultrafast femtosecond transient absorption, we have found a clear equilibrium between the Q x and Q y state of metal‐free phthalocyanines in solution.