Results 61 to 70 of about 47,133 (204)
Synthesis of Asymmetrical Porphyrins Substituted in the meso-Position from Dipyrrolomethanes
Molecules, 2000 A convenient procedure for the synthesis of 5-(4-acetamidophenyl)-10,15,20-tris(4-substituted phenyl) porphyrins from dipyrrolomethane is reported. meso-(4-Substituted phenyl) dipyrrolomethanes were obtained in yields of 72-84%. The amide porphyrins were
E. N. Durantini +3 more
doaj +1 more source
Covalent Organic Frameworks for Photocatalysis
Advanced Materials, EarlyView.This review provides an overview of recent advances in covalent organic frameworks (COFs) for photocatalysis, focusing on sustainable energy applications like water splitting, hydrogen peroxide generation, and CO2 and N2 reduction. It discusses design principles, structure‐function relationships, challenges in COF photocatalysis, and strategies to ...
Bikash Mishra +6 more
wiley +1 more source
When do tripdoublet states fluoresce? A theoretical study of copper(II) porphyrin [PDF]
arXiv, 2023 Open-shell molecules rarely fluoresce, due to their typically faster non-radiative relaxation rates compared to closed-shell ones. Even rarer is the fluorescence from states that have two more unpaired electrons than the open-shell ground state, for example tripdoublet states (a triplet excitation antiferromagnetically coupled to a doublet state).
arxiv
Porphyrins as Theranostic Agents from Prehistoric to Modern Times
Theranostics, 2012 Long before humans roamed the planet, porphyrins in blood were serving not only as indispensable oxygen carriers, but also as the bright red contrast agent that unmistakably indicates injury sites.
Yumiao Zhang, Jonathan F. Lovell
doaj
Advanced Materials, EarlyView.This review describes recent developments in the design and synthesis of metal–organic frameworks (MOF)/textile composites for the detoxification of chemical warfare agent and simulants with extensive discussion on the advantages and disadvantages of different methods.
Zhihua Cheng +4 more
wiley +1 more source
Electrically addressing the spin of a magnetic porphyrin through covalently connected graphene electrodes [PDF]
, 2019 We report on the fabrication and transport characterization of atomically-precise single molecule devices consisting of a magnetic porphyrin covalently wired by graphene nanoribbon electrodes. The tip of a scanning tunneling microscope was utilized to contact the end of a GNR-porphyrin-GNR hybrid system and create a molecular bridge between tip and ...
arxiv +1 more source
Quantum Batteries: A Materials Science Perspective
Advanced Materials, EarlyView.This perspective is focused on advanced materials that might allow the new device class of quantum batteries to be developed. These systems include microcavities with organic molecules, inorganic nanostructures and perovskites, and superconductor circuits.
Andrea Camposeo +5 more
wiley +1 more source
Temperature‐ and pH‐Responsive Polymeric Photocatalysts for Enhanced Control and Recovery
Angewandte Chemie, Volume 134, Issue 51, December 19, 2022., 2022 Stimuli‐responsive photocatalytic materials have emerged that are not only able to efficiently catalyze reactions but can use external stimuli to modulate their physical properties. This technique has been used to control the reactivity of a photocatalytic material turning it on/off. Moreover, photocatalytic materials have been synthesized which can be
Rong Li +2 more
wiley +2 more sources
Excitation transfer and luminescence in porphyrin-carbon nanotube complexes [PDF]
arXiv, 2007 Functionalization of carbon nanotubes with hydrosoluble porphyrins (TPPS) is achieved by "$\pi$-stacking". The porphyrin/nanotube interaction is studied by means of optical absorption, photoluminescence and photoluminescence excitation spectroscopies. The main absorption line of the porphyrins adsorbed on nanotubes exhibits a 120 meV red shift, which ...
arxiv
Advanced Materials, EarlyView.This review explores how in situ and operando spectroscopic techniques reveal the real‐time behavior of reticular materials, including MOFs and COFs. These methods track material formation and functionalization, structural changes, defect formation, dynamic responses to external triggers, and catalytic processes.
Bettina Baumgartner +4 more
wiley +1 more source