Photophysics and photochemistry of porphyrin core PAMAM dendrimers. Excited states interaction with quinones

Abstract

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Machine Learning System To Monitor Hg2+ and Sulfide Using a Polychromatic Fluorescence-Colorimetric Paper Sensor

“…The fluorescence quenching is static quenching if the quenching constant decreases as the temperature rises. Otherwise, the quenching of the fluorescence is dynamic. , The Stern–Volmer equation is as follows: F 0 F = 1 + K S V 0.25em [ c ] where [ c ] denotes the concentration of the quencher (C Hg 2+ or C S 2– ), respectively. K sv is the Stern–Volmer quenching constant, F is the fluorescence intensity after adding a quencher, and F 0 is the addition of a quenching agent.…”

Dielectronic properties and photocatalytic activities of two novel cobalt(II) meso-tetraphenylporphyrin-based coordination complexes

“…These macrocycles have attracted the attention of researchers thanks to their stable π-ring system, due on the one hand to the nature of the substituents in the meso and/or β-positions of the macrocycle and to the coordinating ability of the central metal ion on the other. They have been used in many fields such as optical materials [1], fluorescence materials [2], semiconductors [3], solar photovoltaic cells [4], photochemistry and photophysics [5], coordination chemistry [6] and intermediates for drug synthesis [7] etc. The nitrogen atoms of porphyrin core can coordinate with metal ions, hence porphyrins can act as multi-dentate N-donor ligand to construct metalloporphyrinic coordination complexes.…”

Porphyrin-Modified Cobalt Sulfide as a Developed Noble Metal-free Photoelectrocatalyst toward Methanol Oxidation under Visible Light

“…Porphyrins, a class of macromolecular heterocyclic compound formed from four pyrrole linked by a methylene bridge, have highly efficient optical and electrochemical catalytic properties. − Therefore, more research studies have focused on porphyrin derivatives in the field of electrochemical catalysis and photoelectrocatalysis, especially in the catalytic oxidation reaction. For example, Wang et al synthesized platinum deposited on TMPyP-graphene for methanol electro-oxidation.…”