Solvent-Driven Self-Organization of Meso-Substituted Porphyrins: Morphological Analysis from Fluorescence Lifetime Imaging Microscopy.

ABSTRACT: A morphological analysis of different thin films of meso-tetra-p-(di-p-phenylamino)phenylporphyrin, H₂T(TPA)₄P, was made by fluorescence lifetime imaging microscopy (FLIM) and scanning electron microscopy (SEM). A comprehensive study of H₂T(TPA)₄P was undertaken through UV/vis absorption and fluorescence techniques in different solvents, solvent mixtures and in thin films. In solution, occurrence of intramolecular energy transfer from the triphenylamine (TPA) moieties to the porphyrin core, with quenching efficiencies in the order of 94-97%, is observed. The energy transfer rate constants are determined assuming Förster's dipole-dipole and Dexter's electron

SUBMITTER: Costa T 

PROVIDER: S-EPMC10134502 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature