Absorption and fluorescence properties of aryl substituted porphyrins in different media

Photofunctional hybrid silica microspheres covalently functionalized with metalloporphyrins

“…It is well known that the electronic absorption spectra of porphyrins are extremely sensitive to metallation, protonation, ring oxidation or dimerization processes [32][33][34][35]. Fig.…”

“…2 shows the electronic absorption spectra of the free porphyrin Pp-IX in DMF solution, as well as those corresponding to the metalloporphyrins complex and the hybrid materials. The spectra are characterized by an intense band near 400 nm (which is branded as the Soret band, 405 nm for Pp-IX, 420 nm for Zn-Pp-IX, and 410 nm for Pp-IX-Si-1, respectively) and a series of smaller bands, between 500 and 620 nm, assigned to the Q bands which result from the electronic transitions (505, 540, 575, 617, 630 nm for Pp-IX, 505, 546, 585, 616, 630 nm for Zn-Pp-IX, and 505, 535, 577, 617, 630 nm for Pp-IX-Si-1, respectively) [35]. As shown in Fig.…”

Hybrids formed between polyvinylpyrrolidone and an A3B porphyrin dye: behaviour in aqueous solutions and chemical response to CO2 presence

“…Porphyrins with phenoxy substituents have been synthesized and attracted much attention because of their relatively rigid planar structure and owing to the fact that fluorescence quantum yields of these porphyrins are higher than those of others . These types of aryloxy‐substituted porphyrins have found applications for obtaining functionalized polymers, as building blocks in supramolecular chemistry and as chromatographic supports …”