π-Expanded pyrazinoporphyrins for photocatalysis: How many rings are required?

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.…”

Sewage remediation using solar energy and a triply fused Zn-porphyrin dimer molecular graphene photocatalytic agent

“…[18][19][20][21] To replace an external electrical LED light source with a solar energy source, the photocatalyst must exhibit the following three properties: 1) a small energy band gap to ensure a large light absorption range, 2) a low photogenerated charge carrier complexation rate to ensure a high photogenerated electron lifetime, and 3) a large specific surface area to ensure enhanced adsorption sites for a complete photocatalytic process. [22][23][24] However, due to the high compounding rate of the photogenerated charge carriers, the photocatalytic activity of low bandgap semiconductors is greatly inhibited, thus limiting the application of solar energy in replacing external electrical LED light sources in photocatalytic systems.…”

Efficient Approach to Functionalized β-Imidazolylporphyrins

“…[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.…”