Synthesis and luminescent properties of lanthanide-cored supramolecular complexes based on porphyrins for optical amplification

We have investigated the development of lanthanide-cored supramolecular complexes containing porphyrins to circumvent the solubility problem and maximize the optical amplification properties. Their chemical structures were identified by FT-IR, H-1-NMR, UV-Vis absorption and emission spectroscopies. FB-Por 1 and 2 show a very intense UV-visible absorption band at 419 nm, which is attributed to the Soret band. In addition, the relatively weak bands at 516, 551, 591 and 647 nm. are assigned to the Q bands. Upon a photoexcitation wavelength with 430 nm the PL spectra of FB-Por 1 and 2 exhibit a strong band at 653 nm and a weak peak at 715 nm. Zn-Por I and 2 show a very intense band at 420 mn for B-band pi similar to pi* transitions. In addition, the weak bands at 547 and 585 nm were assigned to the Q bands. With an excitation wavelength of 430 run, the PL spectra of Zn-Por 1 and 2 show a moderate band at 596 nm and a strong band at 646 nm.