College of Science, University of Misan discussed a master dissertation on preparing, diagnosing, and studying of the photophysical properties of some new porphyrin derivatives by postgraduate student, Ms. Rehab Kattan Aflouk.

The dissertation aimed at preparing new porphyrin derivatives through a condensation reaction between pyrrole and aldehyde derivatives containing diphenyl acrylonitrile groups and oxidizing the resulting product using iodine on a layer of silica gel with heating.

The dissertation highlighted that the preparation of the compounds in question, which were characterized spectroscopically using 1HNMR, 13CNMR, DEPT135, IR, and Mass Spectrometer techniques and the study of the photophysical properties of the prepared compounds.

The dissertation reviewed the possibility of overcoming the quenching resulting from the aggregation of porphyrin molecules in the aqueous medium by linking the porphyrin ring with carbon chains containing diphenyl acronymitrile groups, which also have fluorescence activity, which indicates the occurrence of the phenomenon of fluorescence resonance energy transfer (FRET).

The dissertation that treating prepared porphyrin solutions with some metal ions led to a decrease in the intensity of the characteristic band (soret band) and the appearance of a new diagnostic band at 450 nm.

The dissertation recommended the use of prepared aldehydes bearing diphenyl acrylonitrile to prepare several liquid crystal structures with fluorescence properties, and to evaluate the applications of the prepared porphyrins in various fields such as fluorescence sensors, chemical sensors and bioimaging.