Results 1 to 10 of about 21,304 (118)

Heterogeneous porphyrin photosensitizers based on multiple acid–base interactions with amberlyst: high leaching stability under aqueous and non-aqueous conditions and acid-dependent spectral, solubility, and photocatalytic properties [PDF]

RSC Advances
Hexaprotonated meso-tetra(aryl)porphyrins (aryl = 2-pyridyl, 3-pyridyl and 4-pyridyl) anchored to nanostructured Amberlyst 15, nanoAmbSO3H or the sodium salt (NanoAmbSO3Na) with an exceptionally high stability against oxidative degradation and a singlet ...
Deniz Chodari-gharehpapagh, Saeed Zakavi
doaj   +2 more sources

Mechanisms of Phototoxic Effects of Cationic Porphyrins on Human Cells In Vitro

Molecules, 2023
The toxic effects of four cationic porphyrins on various human cells were studied in vitro. It was found that, under dark conditions, porphyrins are almost nontoxic, while, under the action of light, the toxic effect was observed starting from nanomolar ...
Yegor E. Yegorov, Khava S. Vishnyakova, Xiaowen Pan, Anton E. Egorov, Konstantin V. Popov, Liana L. Tevonyan, Galina V. Chashchina, Dmitry N. Kaluzhny   +7 more
doaj   +1 more source

An overview on AIEgen‐decorated porphyrins: Current status and applications

Aggregate, 2023
One of the major obstacles of porphyrins is the aggregation‐caused quenching (ACQ) of photoluminescence due to the strong intermolecular π–π interaction of the planar porphyrin core in the solid state.
Govardhana Babu Bodedla, Xunjin Zhu, Wai‐Yeung Wong   +2 more
doaj   +1 more source

Possible therapeutic targets and promising drugs based on unsymmetrical hetaryl-substituted porphyrins to combat SARS-CoV-2

Journal of Pharmaceutical Analysis, 2021
Coronavirus disease 2019 is a serious disease that causes acute respiratory syndrome and negatively affects the central nervous system. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) crosses the blood-brain barrier due to the spike (S ...
Yury A. Gubarev, Natalya Sh. Lebedeva, Elena S. Yurina, Sergey A. Syrbu, Aleksey N. Kiselev, Mikhail A. Lebedev   +5 more
doaj   +1 more source

Geospatial Synthesis of Biogeochemical Attributions of Porphyrins to Oil Pollution in Marine Sediments of the Gulf of México

Geosciences, 2022
Porphyrins are highly persistent in the environment and represent a helpful biogeochemical attribute to assess the spatial distribution of the effects of oil spills on ecosystems and their resilience.
Francisco Muñoz-Arriola, José Vinicio Macías-Zamora   +1 more
doaj   +1 more source

Functionalization of Porphyrins Using Metal-Catalyzed C–H Activation

Inorganics, 2022
The review is devoted to the C–H functionalization of porphyrins. Porphyrins exhibit the properties of organic semiconductors, light energy converters, chemical and electrochemical catalysts, and photocatalysts.
Aleksey N. Kiselev, Sergey A. Syrbu, Natalia Sh. Lebedeva, Yury A. Gubarev   +3 more
doaj   +1 more source

Air oxidation of the kerogen/asphaltene vanadyl porphyrins: an electron spin resonance study [PDF]

Journal of the Serbian Chemical Society, 2000
The thermal behavior of vanadyl porphyrins was studied by electron spin resonance during heating of kerogens, isolated from the La Luna (Venezuela) and Serpiano (Switzerland) bituminous rocks, at 25°C for 1 to 20 days in the presence of air.
MIRJANA S. PAVLOVIC, DRAGAN M. DJORDJEVIC, IVANA R. TONSA, PAVLE I. PREMOVIC   +3 more
doaj   +2 more sources

Cellular Localization of Selected Porphyrins and Their Effect on the In Vitro Motility of Human Colon Tumors and Normal Cells

Molecules, 2023
Standard therapies for colorectal cancer cannot eliminate or sufficiently reduce the metastasis process. Photodynamic therapy (PDT) may be an alternative to minimizing this problem.
Maciej P. Frant, Mariusz Trytek, Kamil Deryło, Mateusz Kutyła, Roman Paduch   +4 more
doaj   +1 more source

Thiol regulation by Mn porphyrins, commonly known as SOD mimics

Redox Biology, 2019
Superoxide dismutases play an important role in human health and disease. Three decades of effort have gone into synthesizing SOD mimics for clinical use. The result is the Mn porphyrins which have SOD-like activity.
Ines Batinic-Haberle, Margaret E. Tome
doaj   +1 more source

Assessing the In Vitro Activity of Selected Porphyrins in Human Colorectal Cancer Cells

Molecules, 2022
Standard in vitro analyses determining the activity of different compounds included in the chemotherapy of colon cancer are currently insufficient. New ideas, such as photodynamic therapy (PDT), may bring tangible benefits.
Maciej Piotr Frant, Mariusz Trytek, Roman Paduch   +2 more
doaj   +1 more source