Substituent effect on the photobleaching of pyrylium salts under ultrashort pulsed illumination.
The current article presents the photobleaching properties of a group of pyrylium salts under ultrashort pulsed illumination. These pyrylium salts have the same basic chemical structure and differ only by a specific substituent. It is proven experimentally that two different mechanisms are simultaneously present to the photobleaching of all molecules studied (independently of their specific chemical structure). However, the particular parameters of each mechanism are influenced significantly by the substituent change. The experimental investigation of these parameters showed the presence of multiphoton interactions in the photobleaching of pyrylium salts depending essentially on the specific substituent.
Polyzos
Ioannis
I
Physics Department, University of Patras, P.O. Box 1414, Patras 26500, Greece. ipolyzos@physics.upatras.gr
Tsigaridas
George
G
Fakis
Mihalis
M
Giannetas
Vassilis
V
Persephonis
Peter
P
Mikroyannidis
John
J
D006575:Heterocyclic Compounds, 3-Ring / Q000737:chemistry / Q000528:radiation effects*; D015394:Molecular Structure; D038761:Photobleaching; D017785:Photons
D006575:Heterocyclic Compounds, 3-Ring