Results 51 to 60 of about 179,442 (256)

Photo-excitation of a light-harvesting supra-molecular triad: a Time-Dependent DFT study

, 2009
We present the first time-dependent density-functional theory (TDDFT) calculation on a light harvesting triad carotenoid-diaryl-porphyrin-C60. Besides the numerical challenge that the ab initio study of the electronic structure of such a large system ...
Baruah, T., Manghi, F., Pederson, M. R., Rozzi, C. A., Rubio, A., Spallanzani, N., Varsano, D.   +6 more
core   +1 more source

Topologically protected excitons in porphyrin thin films [PDF]

, 2014
The control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems. This transport is easily deteriorated by traps in the disordered energy landscape.
Aspuru-Guzik, Alán, Saikin, Semion S., Yao, Norman Y., Yuen-Zhou, Joel   +3 more
core   +2 more sources

Oxygen and Conformation Dependent Protein Oxidation and Aggregation by Porphyrins in Hepatocytes and Light-Exposed CellsSummary

Cellular and Molecular Gastroenterology and Hepatology, 2019
Background & Aims: Porphyrias are caused by porphyrin accumulation resulting from defects in the heme biosynthetic pathway that typically lead to photosensitivity and possible end-stage liver disease with an increased risk of hepatocellular carcinoma ...
Dhiman Maitra, Eric L. Carter, Rani Richardson, Laure Rittié, Venkatesha Basrur, Haoming Zhang, Alexey I. Nesvizhskii, Yoichi Osawa, Matthew W. Wolf, Stephen W. Ragsdale, Nicolai Lehnert, Harald Herrmann, M. Bishr Omary   +12 more
doaj   +1 more source

Bipyridine-porphyrin conjugates : a thesis presented in partial fulfilment of the requirements for the degree of Masterate of Science in Chemistry at Massey University [PDF]

, 1998
The research carried out for this thesis comprises an investigation into the synthesis of bipyridyl-bridged porphyrin compounds and their metal complexes.
Allwood, Jacinda Louise
core  

Translational and rotational motions of albumin sensed by a non-covalent associated porphyrin under physiological and acidic conditions: a fluorescence correlation spectroscopy and time resolved anisotropy study. [PDF]

, 2008
The interaction between a free-base, anionic water-soluble porphyrin, TSPP, and the drug carrier protein, bovine serum albumin (BSA) has been studied by time-resolved fluorescence anisotropy (TRFA) and fluorescence correlation spectroscopy (FCS) at two ...
Andrade, S.M., Borst, J.W., Costa, S.M., Hoek, A., van, Visser, A.J.W.G.   +4 more
core   +2 more sources

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

Huisgen-based conjugation of water-soluble porphyrins to deprotected sugars: Towards mild strategies for the labelling of glycans [PDF]

, 2014
Fully deprotected alkynyl-functionalised mono- and oligosaccharides undergo CuAAC-based conjugation with water-soluble porphyrin azides in aqueous environments.
Boyle, Ross W., Bryden, Francesca, Daly, Robin, Giuntini, Francesca, Scanlan, Eoin M.   +4 more
core   +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

The identification of histidine ligands to cytochrome a in cytochrome c oxidase [PDF]

, 1985
A histidine auxotroph of Saccharomyces cerevisiae has been used to metabolically incorporate [1,3-15N2] histidine into yeast cytochrome c oxidase. Electron nuclear double resonance (ENDOR) spectroscopy of cytochrome a in the [15N]histidine-substituted ...
Chan, Sunney I., Martin, Craig T., Scholes, Charles P.   +2 more
core  

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