Results 41 to 50 of about 44,750 (259)

Machine Learning Accelerated Computational Design of Bio‐Inspired Catalysts in the Nitrogen Reduction Reaction

Advanced Materials, EarlyView.
We introduce a computational workflow that combines quantum chemical calculations and machine learning techniques to predict the catalytic performance of a wide range of catalysts in the nitrogen reduction reaction (NRR). The analysis of the trained models provides insights into the complex structure–activity relationship in experimental catalytic ...
Leonardo Di Ciano, Zihan You, Haoran Chen, Qifan Zhong, Rong‐Zhen Liao, Shaoqi Zhan   +5 more
wiley   +1 more source

Obstruction of photoinduced electron transfer from excited porphyrin to graphene oxide: a fluorescence turn-on sensing platform for iron (III) ions. [PDF]

PLoS ONE, 2012
A comparative research of the assembly of different porphyrin molecules on graphene oxide (GO) and reduced graphene oxide (RGO) was carried out, respectively. Despite the cationic porphyrin molecules can be assembled onto the surfaces of graphene sheets,
Zhong De Liu, Heng Xin Zhao, Cheng Zhi Huang   +2 more
doaj   +1 more source

Excited-State Dynamics Leading Either to Triplet Formation or Coordinative Expansion following Photolysis of Cu(II)-Porphyrins: A DFT, TD-DFT, Luminescence and Femtosecond Time-Resolved Absorbance Study

Molecules, 2023
The photophysical properties of Cu(II) complexes with 5,10,15,20-meso-tetrakis(phenyl)porphyrin and 5,10,15,20-meso-tetrakis(N-methylpyridium-4-yl)porphyrin are examined via the luminescence and femtosecond time-resolved absorbance methods, respectively.
Ross J. McGarry, Lazaros Varvarezos, Mary T. Pryce, Conor Long   +3 more
doaj   +1 more source

Magnetic‐Field Modulation of Charge Transport in Non‐Fullerene Semiconductors for Enhanced Hydrogen Evolution

Advanced Materials Interfaces, EarlyView.
ABSTRACT This study demonstrates that weak magnetic fields (16–40 mT) increase the efficiency of the hydrogen evolution reaction (HER) in electrocatalysts based on non‐fullerene acceptor (NFA) derivatives IT‐4Cl and Y6. Electrochemical measurements reveal that the application of the magnetic field reduces the onset potential and increases the current ...
João Paulo Araujo Souza, Marlus Koehler, John Fredy Ricardo Marroquin, Jorlandio Francisco Felix, Thanh‐Tuân Bui, Paulo Eduardo Narcizo de Souza, Sebastião William da Silva, Luana Wouk   +7 more
wiley   +1 more source

A New Modified Electrode with a Copolymer of Aniline/Fe(III)-Tetrakis(Para-Aminophenyl)Porphyrin: Test of Its Electrocatalytic Activity Toward the Reduction of Molecular Oxygen and Oxidation of Ascorbic Acid and Sulfite Ion.

International Journal of Electrochemical Science, 2012
The simultaneous electropolymerization of aniline and Fe-porphyrin in HCl by cycling the potential on glassy carbon (GC) and highly ordered pyrolytic graphite (HOPG) electrodes was studied by Scanning Electron Microscopy (SEM), Atomic Force Microscopy ...
Mauricio Lucero, Maritza Riquelme, Galo Ramírez, M. Carmen Goya, Alejandro González Orive, Alberto Hernández Creus, M. Carmen Arévalo, María J. Aguirre   +7 more
doaj   +1 more source

PMP(Porphyrin–Micelle–PSMA) Nanoparticles for Photoacoustic and Ultrasound Signal Amplification in Mouse Prostate Cancer Xenografts

Pharmaceutics, 2021
Photoacoustic (PA) imaging is used widely in cancer diagnosis. However, the availability of PA agents has not made great progress due to the limitations of the one currently in use, porphyrin.
Daehyun Kim, Wonkook Han, Jin Ho Chang, Hak Jong Lee   +3 more
doaj   +1 more source

Interface‐Engineered Binary Framework Composites: Advancing Porous Materials for Precision Medicine

Advanced Materials Interfaces, EarlyView.
Binary framework composites integrate two complementary porous architectures into a unified platform, enabling multifunctional design, enhanced structural tunability, and improved physicochemical performance. By combining high surface area, ordered porosity, interfacial synergy, and versatile functionalization, these hybrid materials offer new ...
Navid Rabiee, Mohammad Rabiee, Mohammad Akrami‐Hasan‐Kohal, Sidi A. Bencherif   +3 more
wiley   +1 more source

The effect of porphyrins on normal and transformed mouse cell lines in the presence of visible light

Brazilian Journal of Medical and Biological Research, 2001
Photodynamic therapy consists of the uptake of a photosensitizing dye, often a porphyrin, by tumor tissue and subsequent irradiation of the tumor with visible light of an appropriate wavelength matched to the absorption spectrum of the photosensitizing ...
S.P.S Tita, J.R. Perussi
doaj   +1 more source

En Route to a Chiral Melanin: The Dynamic “From-Imprinted-to-Template” Supramolecular Role of Porphyrin Hetero-Aggregates During the Oxidative Polymerization of L-DOPA

Frontiers in Chemistry, 2020
Chiral porphyrin hetero-aggregates, produced from meso-tetrakis(4-N-methylpyridyl) porphyrin H2T4 and copper(II) meso-tetrakis(4-sulfonatophenyl)porphyrin CuTPPS by an imprinting effect in the presence of L-3,4-dihydroxyphenylalanine (L-DOPA), are shown ...
Massimiliano Gaeta, Rosalba Randazzo, Valentina Villari, Norberto Micali, Alessandro Pezzella, Roberto Purrello, Marco d'Ischia, Alessandro D'Urso   +7 more
doaj   +1 more source

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source