molecules and of their quadrupolar and dipolar counterparts are reported for a series of solvents with varying polarity. The molecules possess a tri-phenylamine electron donating group and mono-cyano acceptors while olefinic and acetylenic π-linkers have been used. Branching led to an increase of the molar extinction coefficient and to a slight bathochromic shift of the absorption spectra while the
Two-Photon Photosensitized Production of Singlet Oxygen: Sensitizers with Phenylene−Ethynylene-Based Chromophores
作者:Sean P. McIlroy、Emiliano Cló、Lars Nikolajsen、Peter K. Frederiksen、Christian B. Nielsen、Kurt V. Mikkelsen、Kurt V. Gothelf、Peter R. Ogilby
DOI:10.1021/jo0482099
日期:2005.2.1
Singlet molecular oxygen (a1Δg) has been produced and optically monitored in time-resolved experiments upon nonlinear two-photon excitation of photosensitizers that contain triple bonds as an integral part of the chromophore. Both experiments and ab initio computations indicate that the photophysical properties of alkyne-containing sensitizers are similar to those in the alkene-containing analogues