Fluorescence anisotropy and transient absorption of halogenated silicon(IV) phthalocyanines with axial poly(ethyleneglycol) substituents

Herein we report the utilization of fluorescence anisotropy to give rough hints on the conformation of three halogenated silicon-phthalocyanines with axially substituted polyethyleneglycol chains in solution. To deconvolute decay data sets from the instrumental response function a scanning fit algorithm was used, which facilitates the visualization of fitting accuracy and correlation of parameters of the assumed decay function. Moreover, to extend our investigation of photophysical properties in the nonlinear domain, the transient absorption in the picosecond range was measured and thus excited state absorption spectra are presented. Copyright © 2005 Society of Porphyrins & Phthalocyanines.