Metalloporphyrins have been widely studied due to their applications in photochemical and biomedical fields. The objective of this research is to synthesize and characterize the zinc and gold complexes of 5,10,15,20-tetra[3,4-dibenzyloxyphenyl]porphyrin. Both complexes were synthesized using conventional methods and purified using silica gel column chromatography with chloroform as the eluent. Upon metallation of the porphyrin, the electronic absorption spectra exhibited a shift in the Soret band and disappearance of some of the Q bands as was expected upon metallation. The zinc complex exhibited a Soret band at 426 nm and Q bands at 552 and 594 nm with corresponding molar absorptivities of 3.1 x 105 cm-1M-1, 1.5 x 104 cm-1M-1 and 5.5 x 103 cm-1M-1. The zinc complex gave an emission at 606 nm upon excitation in the Soret band and the quantum yield was determined to be 0.08 upon excitation at 515 nm. Preliminary data indicates that the gold complex was successfully synthesized and spectroscopic studies are currently underway. Additional characterizations of these compounds are ongoing.

Synthesis and characterization of the zinc and gold complexes of 5,10,15,20-tetrakis-(3,4-dibenzyloxyphenyl) porphyrin

ACS Spring 2022

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