Porphyrins are of interest in research for their ability to carry out fast electron transfer.  The newly synthesized 5,10,15,20-tetra[3,4-dibenzyloxy]porphyrin, TDBOP, was purified using silica gel column chromatography with chloroform as the eluent.  The porphyrin was then characterized using 1H NMR, 13C NMR, UV-Visible and fluorescence spectroscopy.  The nuclear magnetic resonance spectra confirmed the structure of the compound.  The UV-Vis absorption spectrum of TDBOP shows characteristic spectral patterns similar to those of tetraphenyl porphyrin, with a Soret band at 424 nm and four Q bands at 519, 557, 592, and 650 nm.  A Beer's Law study was carried out to determine the extinction coefficients at each of these wavelengths.  They were found to be 3.9x104M-1cm-1 (424 nm), 1.6x103M-1cm-1(519nm),1.1x103M-1cm-1(557nm), 5.3x102M-1cm-1(592nm), and 5.0x102M-1cm-1(650nm).  Excitation at 424 nm gave an emission at 654 nm.  The manganese and copper complexes of this porphyrin have been synthesized and are currently undergoing characterization.

Synthesis and characterization of a novel porphyrin

245th National Meeting (2013)

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