This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. We are studying linear dichroism and time-resolved fluorescence of chlorophyll a and b in isotropic and oriented films using frequency-domain technique. The complex multi-exponential intensity decay was observed in chlorophyll complexes. Fluorescence lifetime distribution can be correlated with the extend of chlorophyll aggregation. Recently we used Rhodamine 6G laser excitation to obtain high-resolution frequency-domain anisotropy data.
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