Results 51 to 60 of about 370 (171)
, 2021 This work presents a reliable approach for screening porphyrins directly from asphaltenes using positive-ion electrospray ionization mass spectrometry (ESI MS) with sodium formate as an ESI spray modifier.
Jose Mendez-Arroyo +3 more
core +1 more source
Two‐ and Three‐Spin Hybrid Inorganic‐Organic [2]Rotaxanes Containing Metallated Salen Groups
Chemistry – An Asian Journal, Volume 19, Issue 20, October 16, 2024.Heterometallic paramagnetic rotaxanes substituted with additional spins are reported. These additional spins are coordinated to salen ligands and the structure is confirmed in solution by pulsed EPR spectroscopy‐ Abstract Mono‐ and bis‐salen functionalised [2]rotaxanes have been synthesised from the esterification of [2]rotaxanes containing phenol ...
Tom S. Bennett +7 more
wiley +1 more source
Bulletin of the Korean Chemical Society, Volume 45, Issue 10, Page 835-862, October 2024.This review discusses electron paramagnetic resonance (EPR) spectroscopic methods for characterization of transition metal complexes. EPR spectroscopy provides valuable insights into the geometric, electronic, and magnetic properties of paramagnetic molecules, reinforcing the blind spot of nuclear magnetic resonance spectroscopy‐based structural ...
Minyoung Ju, Jin Kim, Jeongcheol Shin
wiley +1 more source
Metalloporphyrins as Building Blocks for Quantum Information Science
Advanced Optical Materials, Volume 12, Issue 18, June 26, 2024.Porphyrins represent ideal building blocks for quantum information science. Their ability to accommodate metal ions makes them an excellent platform for quantum bits. Their distinctive molecular structure enables the formation of quantum logic gates and higher‐dimensional systems.
Fabio Santanni, Alberto Privitera
wiley +1 more source
Electronic and Magnetic Properties of a Monolayer of VOTPP Molecules Sublimated on Ag(100)
Advanced Physics Research, Volume 3, Issue 5, May 2024.Vanadyl tetraphenyl porphyrin molecules (VOTPP) exhibit weak interaction with the Ag(100) surface, displaying only subtle screening effects in the monolayer. The preservation of electronic and spin properties holds promise for quantum applications.
Lorenzo Poggini +14 more
wiley +1 more source
, 2023 We report the synthesis of new vanadyl porphyrins bearing peripheral coordination sites. By using palladium(II) or platinum(II) as connecting ions, porphyrin dimers were isolated and characterized by X-ray crystallography. These paramagnetic species were
Athanassios K. Boudalis (2190952) +7 more
core +1 more source
ENDOR study of nitrogen hyperfine and quadrupole tensors in vanadyl porphyrins of heavy crude oil
, 2020 © Kazan Federal University (KFU).We report the observation of pulsed electron-nuclear double resonance (ENDOR) spectrum caused by interactions of the nitrogen nuclei14N with the unpaired electron of the paramagnetic vanadyl complexes VO2+ of vanadyl ...
Gracheva I. +6 more
core
, 2021 In the present work, the first data on the catalytic activity of d-metal complexes of petroleum porphyrins obtained via two-stage re-metallization (acid demetallization with subsequent metalation) of high-purity petroleum vanadyl porphyrins are presented.
Nikolay Mironov +6 more
core +1 more source
Electron spin resonance of some vanadyl, copper and cobalt porphyrins
, 1974 Electron Spin Resonance study was carried out on a series of metalloporphyrins (where metal = VO²⁺, ⁶³Cu²⁺ , and CO²⁺, porphyrin = (4-pyridyl)porphin, (p-carboxylphenyl)porphin, tetrabenzporphyrin, and octamethyltetrabenzporphyrin), magnetically diluted ...
Lau, Pui-Wah
core
, 2008 A hitherto unknown family of six-coordinate vanadyl porphyrins of the sterically crowded, nonplanar 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetranitroporphyrin incorporating axial ligand L [where L is pyridine, tetrahydrofuran (THF), or methanol (MeOH)]
Ghosh, Sudip Kumar +2 more
core +1 more source