Photoluminescence and transient spectroscopy of free base porphyrin aggregates

Research was conducted to examine the photoluminescence and transient spectroscopy of free base porphyrin aggregates. Four different types of aggregates whose absorption spectra were characterized by invariant Soret bands with bandwidths that were independent of the preparative approach were studied. Results demonstrate that the aggregates differ in their time-resolved absorption and fluorescence decay properties which may be attributed to differences in aggregate structures.