Results 21 to 30 of about 148,723 (351)

Synthesis of Fe(II)/Co(II)-Fused Triphenyl Porphyrin Dimer as Candidate for Oxygen Reduction Reaction Catalyst

Indonesian Journal of Chemistry, 2021
This paper reports the synthesis of Fe(II)/Co(II) fused triphenyl porphyrin dimers as candidate of hybrid organic metal electrocatalyst. The synthesis was conducted in five-step reactions using the starting materials pyrrole and benzaldehyde.
Atmanto Heru Wibowo, Anggit Pradifta, Abu Masykur, Ken-ichi Yamashita, Yosuke Tani, Ari Yustisia Akbar, Takuji Ogawa   +6 more
doaj   +1 more source

Anthracene‐Porphyrin Nanoribbons

Angewandte Chemie International Edition, 2023
Abstractπ‐Conjugated nanoribbons attract interest because of their unusual electronic structures and charge‐transport behavior. Here, we report the synthesis of a series of fully edge‐fused porphyrin‐anthracene oligomeric ribbons (dimer and trimer), together with a computational study of the corresponding infinite polymer.
Zhu, H, Chen, Q, Rončević, I, Christensen, KE, Anderson, HL   +4 more
openaire   +4 more sources

Proof of concept for molecular velcro based on the attractive interaction between porphyrin and pyridine containing copolymers

eXPRESS Polymer Letters, 2018
In this short communication, we investigated the synthesis and mixing of porphyrin and pyridine functionalized copolymers as a proof of concept for a velcro-like interaction.
M. Sievers, J. C. Namyslo, F. Lederle, E. G. Huebner   +3 more
doaj   +1 more source

Porphyrin-Based Covalent Organic Frameworks: Design, Synthesis, Photoelectric Conversion Mechanism, and Applications

Biomimetics, 2023
Photosynthesis occurs in high plants, and certain organisms show brilliant technology in converting solar light to chemical energy and producing carbohydrates from carbon dioxide (CO2).
Xiaoyu Li, Chuanyin Tang, Li Zhang, Mingyang Song, Yujie Zhang, Shengjie Wang   +5 more
doaj   +1 more source

Interlocked Porphyrin Switches [PDF]

Chemistry – A European Journal, 2013
AbstractWe describe the synthesis of a series of interlocked structures from porphyrin–glycoluril cage compounds and bis(olefin)‐terminated viologens by an olefin‐metathesis protocol. The length of the chain connecting the olefin substituents with the viologen has a marked effect on the products of the ring‐closure reaction.
Coumans, R.G.E., Coumans, R.G.E., Elemans, J.A.A.W., Rowan, A.E., Rowan, A.E., Nolte, R.J.M.   +5 more
openaire   +6 more sources

Inverted porphyrins and expanded porphyrins: An overview [PDF]

Journal of Chemical Sciences, 2002
Porphyrins and metallopophyrins have attracted the attention of chemists for the past 100 years or more owing to their widespread involvement in biology. More recently, synthetic porphyrins and porphyrin-like macrocycles have attracted the attention of researchers due to their diverse applications as sensitizers for photodynamic therapy, MRI ...
Simi K. Pushpan, Venkataramanarao G. Anand, Tavarekere K. Chandrashekar, Jeyaraman Sankar, Harapriya Rath, Sundararaman Venkatraman   +5 more
openaire   +2 more sources

Chiral porphyrin assemblies

Aggregate, 2023
Porphyrins are among the most important macrocycles because they perform many essential functions in living systems and serve as building blocks in many functional materials. Incorporating the chirality into porphyrins can aid biomimetic research and the
Li Zhang, Tianyu Wang, Jianzhuang Jiang, Minghua Liu   +3 more
doaj   +1 more source

Excited-state normal-modes analysis: the case of porphyrins [PDF]

arXiv, 2023
Excited state normal modes analysis is systematically applied to investigate and compare relaxation and internal conversion dynamics of a free-base porphyrin with a novel functional porphyrin derivative. We discuss strenghts and limitation of the method, and employ it to predict very different dynamical behaviours in the two compounds and to clarify ...
arxiv  

Characterization of the Magnetism and Conformation of Single Porphyrin Molecules Adsorbed on Surfaces, and Artificial Graphene Nanoflakes [PDF]

arXiv, 2022
My thesis mostly focusses on the systems of porphyrin molecules adsorbed on single-crystalline metallic surfaces. Cyclic tetrapyrrole porphyrins play key roles in many important chemical and biological processes, such as oxygen transport in heme (iron porphyrin), electron transfer and oxidation reactions in photosynthetic chlorophyll (magnesium ...
arxiv  

Detection of adsorbed transition-metal porphyrins by spin-dependent conductance of graphene nanoribbon [PDF]

RSC Advances 7, 29112 (2017), 2017
Electronic transport in a zig-zag-edge graphene nanoribbon (GNR) and its modification by adsorbed transition metal porphyrins is studied by means of density functional theory calculations. The detachment reaction of the metal centre of the porphyrin is investigated both in the gas phase and for molecules adsorbed on the GNR.
arxiv   +1 more source