Results 51 to 60 of about 23,032 (162)

Computational and Experimental Study of the Structure, Binding Preferences, and Spectroscopy of Nickel(II) and Vanadyl Porphyrins in Petroleum

, 2016
We present a computational exploration of five- and six-coordinate Ni(II) and vanadyl porphyrins, including prediction of UV−vis spectroscopic behavior and metalloporphyrin structure as well as determination of a binding energy threshold between strongly
Stanislav R. Stoyanov (1304532), Murray R. Gray (1264290), Cindy-Xing Yin (1264800), Jeffrey M. Stryker (1264803), Sergey Gusarov (1304526), Andriy Kovalenko (92363)   +5 more
core   +1 more source

Simultaneous Detection of Vanadyl, Nickel, Iron, and Gallium Porphyrins in Marine Shales from the Eagle Ford Formation, South Texas

, 2018
Metalloporphyrins in immature shales of the Late Cretaceous Eagle Ford Formation from South Texas were analyzed by positive-ion electrospray ionization (ESI) Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS).
Chang Samuel Hsu (1280709), Yongge Sun, Fang Zheng (54278), Hong Lu, Zheng, Fang, Quan Shi (1261062), Fang Zheng, Wu, Yangyang, Hong Lu (58784), Hsu, Chang Samuel, Sun, Yongge, Shi, Quan, Yangyang Wu, Lu, Hong, Xun Sun, Zhang, Yahe, Yahe Zhang, Yongge Sun (5801354), Xun Sun (364650), Quan Shi, Chang Samuel Hsu, Sun, Xun, Yangyang Wu (2887202), Yahe Zhang (1261077)   +23 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   +1 more source

Vanadyl Porphyrins in Heavy Crude Oils: Extraction, Petroleomics and Catalytic Applications

This review is devoted to the occurrence, extraction, structural characterization and catalytic applications of vanadyl porphyrins present in heavy crude oils and petroleum residues. Vanadyl porphyrins represent the major vanadium-containing compounds in
Anar Seysembekova, Akerke Abylaikhan, Atıf Koca, Laura Myltykbayeva, Imge Kalkan, Dinara Muktaly, Zhannur Myltykbayeva   +6 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., Biktagirov T., Orlinskii S., Mamin G., Gafurov M., Rodionov A., Galukhin A.   +6 more
core  

An exchange coupled meso-meso linked vanadyl porphyrin dimer for quantum information processing. [PDF]

Chem Sci, 2022
Ranieri D, Santanni F, Privitera A, Albino A, Salvadori E, Chiesa M, Totti F, Sorace L, Sessoli R.   +8 more
europepmc   +1 more source

Hydrodevanadization of Vanadyl Porphyrin by Tetralin

Journal of The Japan Petroleum Institute, 1981
Hiroshi KAMEYAMA, Masami SUGISHIMA, Muneyoshi YAMADA, Akira AMANO   +3 more
openaire   +2 more sources

V-Porphyrins Encapsulated or Supported on Siliceous Materials: Synthesis, Characterization, and Photoelectrochemical Properties. [PDF]

Materials (Basel), 2022
Myltykbayeva ZK, Seysembekova A, Moreno BM, Sánchez-Tovar R, Fernández-Domene RM, Vidal-Moya A, Solsona B, López Nieto JM.   +7 more
europepmc   +1 more source

Impact of N, O Heteroatoms in Asphaltene on Adsorption of Vanadyl/Nickel Etioporphyrin. [PDF]

ACS Omega, 2022
Chen F, Wang Q, Zhang L, Zhu Q.
europepmc   +1 more source

Axial Ligand Coordination in Sterically Strained Vanadyl Porphyrins: Synthesis, Structure, and Properties

, 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, Patra, Ranjan, Rath, Sankar Prasad   +2 more
core   +1 more source