Diaryl-pyrazinoporphyrins – Prospective photocatalysts for efficient sulfoxidation

Phosphonate-substituted porphyrins as efficient, cost-effective and reusable photocatalysts

“…As a result, homogeneous reactions using porphyrin PCs are often performed in chlorinated solvents, employing specific derivatives prepared through complex multistep synthetic procedures. 14,95–97 To overcome these drawbacks, researchers have focused on developing efficient methods for their heterogenization 98–105 and have explored the replacement of porphyrins with alternative organic dyes or materials, even though these dyes generally possess less favorable light-absorbing properties and photostability. 106–111 Within this context, the availability and improved solubility of porphyrins prepared in this work make them promising candidates for performing various homogeneous photocatalytic processes, including the sulfoxidation reaction.…”

“…As a result, homogeneous reactions using porphyrin PCs are often performed in chlorinated solvents, employing specific derivatives prepared through complex multistep synthetic procedures. 14,[95][96][97] To overcome these drawbacks, researchers have focused on developing efficient methods for their heterogenization [98][99][100][101][102][103][104][105] and have explored the replacement of porphyrins with alternative organic dyes or materials, even though these dyes generally possess less favorable light-…”

Nanostructured Aluminum Oxyhydroxide—A Prospective Support for Functional Porphyrin-Based Materials

“…The porphyrin bearing an anchoring group was subsequently used in the immobilization stage. The photostability of the prepared Ni-5 was tested by irradiation of its solutions with a 3W blue LED, namely the conditions of photobleaching of photoactive porphyrins reported previously [44,45]. Three different solvents were chosen (CCl4, toluene and CH2Cl2) for the tests, which differ in reported lifetimes of singlet oxygen.…”

“…The prepared material was repeatedly washed with CH2Cl2 in 24 h intervals until leaching was not observed and the washings were colorless. The analysis of the washings with UV-Vis allowed us to evaluate the amount of recovered Ni-6 and, thus, to analyze the ratio of porphyrin in the prepared The photostability of the prepared Ni-5 was tested by irradiation of its solutions with a 3W blue LED, namely the conditions of photobleaching of photoactive porphyrins reported previously [44,45]. Three different solvents were chosen (CCl 4 , toluene and CH 2 Cl 2 ) for the tests, which differ in reported lifetimes of singlet oxygen.…”

Efficient Approach to Functionalized β-Imidazolylporphyrins

“…[18][19][20][21] In this respect the formation of the imidazole heterocycles was shown to be a convenient approach for the conjugation of porphyrins and peripheral coordination centers. [18,22,23] Thus, we have successfully generalized the approaches for the preparation of functionalized meso-imidazolyl-, [19,24] imidazo-, [18,25,26] -pyrazino-, [22,27,28] and expanded pyrazino-derivatives. [29] In the present work we focused on the determination of the application scope of Debus-Radziszewski condensation for the preparation of a series of porphyrins containing functional -imidazolyl-substituents.…”