Results 141 to 150 of about 23,032 (162)

Vanadyl Porphyrin Complex Functionalized with Nitronyl Nitroxide

Inorganic Chemistry
Abstract The development of effective frameworks for coupling chemically synthesized qubits is essential for advancing molecular quantum technologies. Vanadium(IV) (VO) magnetic centers are promising candidates for molecular quantum units.
Anastasiya M. Zimina, Alexandr S. Shmakov, Andrey V. Stepanov, Anastasia Lisyukova, Igor A. Zayakin, Egor A. Sosunov, Nina P. Gritsan, Alexey A. Dmitriev, Aleksander V. Akimov, Evgeny V. Tretyakov   +9 more
openaire   +1 more source

Nickel and vanadyl porphyrins in Saudi Arabian crude oils

Energy & Fuels, 1993
This study reports the isolation and characterization of nickel and vanadyl porphyrins in the residue (535 °C+) and asphaltenes from Arabian Heavy crude oil. The residue was obtained by distillation of crude oil, whereas the asphaltenes were precipitated by n-heptane from the crude oil.
Mohammad F. Ali, H. Perzanowski, A. Bukhari, Adnan A. Al-Haji   +3 more
openaire   +1 more source

Observation of vanadyl porphyrins and sulfur‐containing vanadyl porphyrins in a petroleum asphaltene by atmospheric pressure photonionization Fourier transform ion cyclotron resonance mass spectrometry

Rapid Communications in Mass Spectrometry, 2008
Abstract Vanadyl (VO) porphyrins and sulfur‐containing vanadyl (VOS) porphyrins of a wide carbon number range (C 26 to C 52 ) and Z‐number range (−28 to −54) were detected and identified in a petroleum asphaltene by atmospheric ...
Kuangnan, Qian, Anthony S, Mennito, Kathleen E, Edwards, Dave T, Ferrughelli   +3 more
openaire   +2 more sources

The structure of vanadyl porphyrins of petroleum

Petroleum Chemistry U.S.S.R., 1980
A SHULGA, T MOZZHELINA, O SEREBRENNIKOVA, V TITOV   +3 more
openaire   +1 more source

Electrochemistry of vanadyl porphyrins in dimethylformamide

Inorganic Chemistry, 1988
Karl M. Kadish, D. Sazou, C. Araullo, Y. M. Liu, A. Saoiabi, M. Ferhat, R. Guilard   +6 more
openaire   +1 more source

Diffusivity and hydrogenation of vanadyl porphyrins in the synthesized NiMo/Zr-SBA-15 and industrial NiMo/γ-AlO catalysts

Chemical Engineering Science, 2022
Zhentao Chen, Jiahuan Yu
exaly  

Distributions of vanadyl and nickel porphyrins in the Woodford Shale and selective chelation of metal species by different tetrapyrrole configurations

Organic Geochemistry, 2023
Xiao-Lei Liu, Derek Parks
exaly  

Adsorption-Extrographic Preconcentration of Petroleum Vanadyl Porphyrins from Dimethylformamide Extract of Heavy Petroleum Asphaltenes

Russian Journal of Applied Chemistry, 2021
Svetlana G Yakubova, Elvira G Tazeeva, Makhmut R Yakubov   +2 more
exaly  

A Comparative Analysis of Vanadyl Porphyrins Isolated from Heavy Oil Asphaltenes with High and Low Vanadium Content

Petroleum Chemistry, 2022
Svetlana G Yakubova, Elvira G Tazeeva, Damir Tazeev   +2 more
exaly  

The Kinetics of Porphyrin Hydrodemetallation. 2. Vanadyl Compounds

Industrial & Engineering Chemistry Process Design and Development, 1980
Chi-Wen Hung, James Wei
openaire   +1 more source