scholarly journals Effect of Chirality on the Binding of Viologen Guests in Porphyrin Macrocycles

2019 ◽  
Vol 2019 (21) ◽  
pp. 3525-3533 ◽  
Author(s):  
Shaji Varghese ◽  
Bram Spierenburg ◽  
Jeroen P. J. Bruekers ◽  
Anne Swartjes ◽  
Paul B. White ◽  
...  
Keyword(s):  
Porphyrin Macrocycles

Making Graphene-type Material via Polymerization of Porphyrin

2020 ◽  
Author(s):  
SANJIB KAR ◽  
Sruti Mondal ◽  
Kasturi Sahu ◽  
Dilruba Hasina ◽  
Tapobrata Som ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Polymeric Material ◽  
Single Layer ◽  
Type Material ◽  
Synthetic Pathway ◽  
Simple Chemical ◽  
Doped Graphene ◽  
Ring Nitrogen ◽  
2D Structure ◽  
Porphyrin Macrocycles

<p>The synthesis of new graphene-type materials (<i>via</i> polymerization of porphyrin macrocycles) through a simple chemical synthetic pathway (at RT) has been demonstrated. This newly synthesized material can be dispersed in water with an average sheet size of few microns and with single layer thickness. As the porphyrin contains four inner ring nitrogen atoms thus the presented polymeric material will be close analogous of N-doped graphene. Porphyrin as the key component to synthesize layered graphene type continuous 2D structure has never been attempted before. </p> <p> </p>

scholarly journals Syntheses and Functionalizations of Porphyrin Macrocycles

2014 ◽  
Vol 11 (1) ◽  
pp. 3-28 ◽  
Author(s):  
Maria Vicente ◽  
Kevin Smith
Keyword(s):  
Porphyrin Macrocycles

Expanded combinatorial formation of porphyrin macrocycles in aqueous solution containing vesicles. A prebiotic model

2013 ◽  
Vol 37 (4) ◽  
pp. 1073 ◽  
Author(s):  
Ana R. M. Soares ◽  
Masahiko Taniguchi ◽  
Vanampally Chandrashaker ◽  
Jonathan S. Lindsey
Keyword(s):  
Aqueous Solution ◽  
Porphyrin Macrocycles

scholarly journals Influence of solid matrices on spectral features of metalloporphyrins

2018 ◽  
Vol 190 ◽  
pp. 03013
Author(s):  
Aleksandr Starukhin ◽  
Aleksander Gorski ◽  
Michal Kijak
Keyword(s):  
Experimental Data ◽  
Dft Calculations ◽  
Electronic State ◽  
Ground Electronic State ◽  
Spectral Features ◽  
Cryogenic Temperatures ◽  
Solid Matrices ◽  
Porphyrin Macrocycles

A way of simultaneously forming in the ground electronic state a planar, as well as two distorted forms was established for a set of metalloporphyrins in solid matrices at cryogenic temperatures. Experimental data together with results of theoretical DFT calculations are combined for analysis and assignment of possible types of distorted porphyrin macrocycles conformations.

Carbene-Type Species in the Functionalization of Porphyrin Derivatives

Synthesis ◽  
2018 ◽  
Vol 50 (14) ◽  
pp. 2678-2692 ◽  
Author(s):  
Ana Gomes ◽  
Luana Forezi ◽  
Mário Simões ◽  
Daniel Gonzaga ◽  
Mariana Cardoso ◽  
...  
Keyword(s):  
Type Species ◽  
Short Review ◽  
Transient Species ◽  
Porphyrin Derivatives ◽  
Porphyrin Macrocycles

Carbenes and NHCs play an important role in porphyrin chemistry and several synthetically useful transformations leading to the preparation of new porphyrin derivatives have been developed. This short review presents an overview covering the literature from 2007–2017, on the role of these transient species in the functionalization of porphyrin macrocycles.

Excited States of Porphyrin Macrocycles

2008 ◽  
Vol 112 (44) ◽  
pp. 11044-11051 ◽  
Author(s):  
Laura Moroni ◽  
Cristina Gellini ◽  
Pier Remigio Salvi ◽  
Agnese Marcelli ◽  
Paolo Foggi
Keyword(s):  
Excited States ◽  
Porphyrin Macrocycles

Single Molecule Visualization of Coordination-Assembled Porphyrin Macrocycles Reinforced with Covalent Linkings

2005 ◽  
Vol 127 (24) ◽  
pp. 8598-8599 ◽  
Author(s):  
Osami Shoji ◽  
Hiroyuki Tanaka ◽  
Tomoji Kawai ◽  
Yoshiaki Kobuke
Keyword(s):  
Single Molecule ◽  
Porphyrin Macrocycles

Die reversible Einelektronen-Oxydation von Metallochlorinen und ein Vergleich der Liganden Octaäthylporphin und -chlorin

1970 ◽  
Vol 25 (3) ◽  
pp. 255-265 ◽  
Author(s):  
Jürgen-Hinrich Fuhrhop
Keyword(s):  
Saturated Calomel Electrode ◽  
Esr Spectra ◽  
Ligand Field ◽  
Ionic Character ◽  
Unusual Behavior ◽  
Oxidation Potentials ◽  
Porphyrin Derivatives ◽  
The One ◽  
Porphyrin Macrocycles ◽  
Metal Ligand

Many metallochlorins can be reversibly oxidized in a one electron step. The midpoint oxidation potentials of magnesium-octaethyl-chlorin (MgOÄC), ZnOÄC, CuOÄC, NiOÁC and PdOÄC were found to be approximately 107, 197, 331, 356, and 422 mV vs. a saturated calomel electrode in chloroformmethanol. As with analogous metalloporphyrins the order of the oxidations potentials increases approximately linearly with the electronegativity values of the metal ions. The midpoint potentials of the one-electron oxidation of metallochlorins were found to be about 300 mV lower than those of analogous metallporphyrins. Sn (IV) -OÄC-dihydroxide and the monocation of OÄC could not be reversibly oxidized. A simple electrostatic argument can explain the oxidation behavior of these and other porphyrin derivatives. The more negative the ligand ring, the easier it is to remove an electron and vice versa. Thus experimental results point to a more ionic character of the metal-ligand bonds in metallochlorins as compared to metalloporphyrins. The unusual behavior of chlorophyll a and the optical and ESR-spectra of the resulting radicals are discussed.Some general properties of the chlorin- and porphyrin macrocycles are compared. Characteristic differences between the two ligand-systems are explained by the low basicity of the pyrrolin-nitrogen and the decreased symmetry of the ligand field in the chlorins.

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