Results 21 to 30 of about 40,631 (243)

Gold(II) Porphyrins are Inherently Waved [PDF]

open access: yes, 2023
Relativistic DFT (OLYP-D3/ZORA-STO-TZ2P) calculations predict low adiabatic ionization potentials for gold(II) porphyrins, from 4.60 eV for Au[TPP] (TPP = tetraphenylporphyrin) to 5.34 eV for Au[TPFPP] [TPFPP = tetrakis(pentafluorophenyl)porphyrin ...
Abhik, Ghosh, Jeanet, Conradie
core   +2 more sources

Porphyrins as Corrosion Inhibitors for N80 Steel in 3.5% NaCl Solution: Electrochemical, Quantum Chemical, QSAR and Monte Carlo Simulations Studies

open access: yesMolecules, 2015
The inhibition of the corrosion of N80 steel in 3.5 wt. % NaCl solution saturated with CO2 by four porphyrins, namely 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphyrin (HPTB), 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphyrin (T4PP), 4,4′,4″,4 ...
Ambrish Singh   +11 more
doaj   +1 more source

Nonlinear photonics properties of porphyrins nanocomposites and self-assembled porphyrins [PDF]

open access: yes, 2012
Two major reasons limit porphyrins photonic applications: (i) the difficulty of handling them in liquid solutions and (ii) their degradation with long exposure to light.
D. Hamidi   +19 more
core   +1 more source

Preliminary study of metalloporphyrins in some oil shales, red sea, Egypt

open access: yesEgyptian Journal of Petroleum, 2017
Occurence and distribution of metalloporphyrins were studied in asphaltene and maltene fractions of some Egyptian oil shales from the main producing mines (Abu-Shegeili, El-Beida, El-Nakheil and Abu-Tundub I, II) in red sea area (Fig.
S.M. El-Sabagh   +3 more
doaj   +1 more source

Phosphates Induced H-Type or J-Type Aggregation of Cationic Porphyrins with Varied Side Chains

open access: yesMolecules, 2023
Non-covalent interactions have been extensively used to fabricate nanoscale architectures in supramolecular chemistry. However, the biomimetic self-assembly of diverse nanostructures in aqueous solution with reversibility induced by different important ...
Zhiliang Li   +4 more
doaj   +1 more source

Photodynamic activity of novel cationic porphyrins conjugated to graphene quantum dots against Staphylococcus aureus [PDF]

open access: yes, 2022
Novel 5-(pyridyl)-10-15-20-tris(4-bromophenyl) porphyrin (complex 1), indium metal derivative (complex 2), and quaternized derivative (complex 3) were synthesized and conjugated to graphene quantum dots (GQDs).
Magaela, N Bridged   +3 more
core   +1 more source

Xenobiotics Triggering Acute Intermittent Porphyria and Their Effect on Mouse Brain Respiratory Complexes

open access: yesJournal of Xenobiotics
Heme enzyme dysfunction causes a group of diseases called porphyrias. Particularly, a decrease in porphobilinogen deaminase, involved in the third step of heme biosynthesis, leads to acute intermittent porphyria (AIP).
Johanna Romina Zuccoli   +3 more
doaj   +1 more source

Effect of Antiepileptic Drugs on the Urinary Excretion of Porphyrins in Non-porphyric Subjects

open access: yesJournal of Pharmacological Sciences, 2005
The action of some anticonvulsant drugs as the causal agents of attacks of acute porphyria has been widely documented in the literature. However, little attention has been paid to the effect of these drugs on the urinary excretion of porphyrins in non ...
Maria J. Tutor-Crespo   +2 more
doaj   +1 more source

Synthesis and characterization of novel azo-bridged Zn(II) and Co(II) bisphthalocyanines

open access: yes, 2006
Metal phthalocyanines containing an unsymmetrically substituted nitro group were synthesized from 4-nitrophthatonitrile and the corresponding anhydrous metal salts (Co(OAc)(2), Zn(OAc)(2)) by the method of statistically mixed condensation reactions.

core   +2 more sources

A Modified Vilsmeier–Haack Strategy to Construct β-Pyridine-Fused 5,10,15,20-Tetraarylporphyrins

open access: yesSynOpen, 2020
A modified Vilsmeier–Haack strategy has been developed to construct a novel series of π-extended nickel(II) or copper(II) complexes of 2-chloro-3-formyl- and 3-formylpyrido[2,3-b]porphyrins from 2-acetamido-meso-tetraarylporphyrins. After chromatographic
Pargat Singh, Mahendra Nath
doaj   +1 more source

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