Spectral features of conjugated bichromophores: porphyrins with curcumin

Conjugated bichromophores of porphyrins with natural compound curcumin were synthesized and studied by methods of spectroscopy. The fluorescence spectra of bichromophore consist of four bands covered almost a whole visible spectrum from 450 to 700 nm. A relatively weak interaction between curcumin and metalloporphyrin allows to combine both effects: high generation efficiency of singlet oxygen by metalloporphyrin and an anticancer treatment of curcumin

Spectral features of conjugated bichromophores: porphyrins with curcumin

Conjugated bichromophores of porphyrins with natural compound curcumin were synthesized and studied by methods of spectroscopy. The fluorescence spectra of bichromophore consist of four bands covered almost a whole visible spectrum from 450 to 700 nm. A relatively weak interaction between curcumin and metalloporphyrin allows to combine both effects: high generation efficiency of singlet oxygen by metalloporphyrin and an anticancer treatment of curcumin

Creation of chemically conjugated multichromophoric complexes based on

New multichromophoric complexes based on metallocomplexes of meso-tetraphenylporphyrins chemically conjugated with curcumins and para-terphenyls have been synthesized. Four bands appeared in the luminescence spectrum were assigned. Two first bands in the spectrum at 465 and 497 nm correspond to the luminescence of curcumin, and the bands at 619 and 677 nm belong to the luminescence of the meso-substituted metallocomplex of porphyrin. Similar spectral data are manifested in the fluorescence spectra of a complex with four para-terphenyl substituents. For the last one compound the energy transfer between the molecules of the para-terphenyl and metalloporphyrin was postulated with the efficiency of about 20%

Creation of chemically conjugated multichromophoric complexes based on meso-substituted metalloporphyrins

New multichromophoric complexes based on metallocomplexes of meso-tetraphenylporphyrins chemically conjugated with curcumins and para-terphenyls have been synthesized. Four bands appeared in the luminescence spectrum were assigned. Two first bands in the spectrum at 465 and 497 nm correspond to the luminescence of curcumin, and the bands at 619 and 677 nm belong to the luminescence of the meso-substituted metallocomplex of porphyrin. Similar spectral data are manifested in the fluorescence spectra of a complex with four para-terphenyl substituents. For the last one compound the energy transfer between the molecules of the para-terphenyl and metalloporphyrin was postulated with the efficiency of about 20%

Conductive Luminescent Material Based on Polymer-Functionalized Graphene Composite

The synthesis of a new nanostructured supramolecular europium complex supported by graphene oxide (GO) as a structure-forming site is herein presented. The bonding of Eu ions to the GO surface is proven by energy dispersive X-ray spectroscopy and photoluminescence mapping, as well as scanning electron microscopy (SEM), spectroscopic, Fourier transform infrared spectroscopy, Raman, and luminescence measurements. Though GO is one of the ligands and absorbs light strongly, the energy transfer from GO to Eu ion is weak. The splitting of D-5(0)-> F-7(2) peak and three-component luminescence decay means that there are several emitting centers in this composite. The obtained data are the first proof of concept for a stable, highly luminescent, and electrically conductive hybrid nanocomposite based on polystyrene added with 2% (w/w) of the obtained Eu-GO complex. The simple and reliable proposed procedure is prone to be easily scaled up and open the route for the commercialization of this nanomaterial