Methods for Studying Petroleum Porphyrins (Review)

Mironov, N. A.; Milordov, D. V.; Abilova, G. R.; Yakubova, S. G.; Yakubov, M. R.

doi:10.1134/s0965544119100074

Cited by 25 publications

(35 citation statements)

References 103 publications

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“…There are 22 p-electrons present, 18 of which are involved in delocalization, while two electron pairs of nitrogen atoms are sterically hindered when bound to hydrogen, in accordance with Hückel's rule. 4,15 The conjugated double bonds of 6), the metalloporphyrin hemin (7), and the open-chain tetrapyrrole derivatives biliverdin IXa (8) and bilirubin IX-a (9) in aqueous solution (100 mM concentration).…”

Section: Physicochemical Properties Of Selected Porphyrinsmentioning

confidence: 99%

“…9,51 These are collectively known as geoporphyrins or petroporphyrins and have been extensively reviewed. [5][6][7][8][9]11 Selected structures are shown in Fig. 11 along with their supposed biological origins.…”

Section: Proposed Diagenesis Of Heme and Chlorophyll A With Evidence From Sedimentary Porphyrinsmentioning

confidence: 99%

“…2,3 Porphyrins are found either isolated in sediments, oil shales, and petroleum, 4 or bound to a fossil tissue. While the ndings and structural features of sedimentary porphyrins have been extensively discussed, [5][6][7][8][9][10][11] reviews on porphyrins extracted from fossil tissues are lacking. This review article aims to describe the major porphyrins found in fossil plants and animals, and to compare them to natural porphyrins well-known in the present-day world such as heme, chlorophylls, and bacteriochlorophylls.…”

Section: Introductionmentioning

confidence: 99%

“…Fig.2Structures and colors of protoporphyrin IX (6), the metalloporphyrin hemin(7), and the open-chain tetrapyrrole derivatives biliverdin IXa (8) and bilirubin IX-a (9) in aqueous solution (100 mM concentration).…”

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Chemistry of porphyrins in fossil plants and animals

et al. 2021

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Section: Physicochemical Properties Of Selected Porphyrinsmentioning

confidence: 99%

Section: Proposed Diagenesis Of Heme and Chlorophyll A With Evidence From Sedimentary Porphyrinsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Chemistry of porphyrins in fossil plants and animals

et al. 2021

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“…Therefore, the process of extracting vanadium from oil can become more cost effective, and it can also provide products for metallurgical production because its demand for vanadium is constantly growing [4]. In addition, extraction of vanadium in the form of porphyrin complexes by extractive methods is also important for the petrochemical industry [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of leaching parameters on the vanadium extraction from petroleum coke

2021

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More than 60 trace elements, including rare metals, can be found in heavy oils. The most valuable component of oils and petroleum products is vanadium. It is used as an alloying agent to create extra strong steel, as a cathode for lithium-ion batteries, and also as a catalyst in the chemical industry. Nowadays studies of various methods for extracting vanadium from heavy oils and petroleum products are actively carried out. This work presents the method of alkaline and acid leaching of vanadium from petroleum coke and also results of the examination of influence of factors such as the duration of the process (0.5, 1.5 and 2.5 h) and the ratio of solid and liquid phases (1:2, 1:3 and 1:4). The highest yield of vanadium 80% is observed using sulfuric acid with the process duration is 1.5 hours and the ratio S/L = 1:4

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An Indium Synthetic Etioporphyrin for Organic Electronics: Aggregation and Photoconductivity in Thin Films

et al. 2023

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A new complex of indium(III)chloride with etioporphyrin-I was synthesized and characterized. As with naturally occurring extraligated etioporphyrins, the InCl-EtioPÀ I spectrum in solution has a very strong B-band and a more than an order of magnitude weaker Q-band, but this difference diminishes in solid films of InCl-EtioPÀ I obtained by thermal evaporation in vacuum. In a solid, molecules have a tight convex-convex arrangement in a 2D double layered structure with interplane distance of 3.066 Å. The conductivity of films can easily be activated by the action of temperature or light. In the cells with symmetrical lateral contacts the photocurrent exceeds the dark current by about three orders of magnitude, with the contribution of photons in the Q-band range being greater than expected from the experimental or calculated absorption spectrum. The Q-bands contribute significantly to the photovoltaic effect in the ITO/InCl-EtioPÀ I/Al sandwich cells. Such cells show an untypically strong signal in the photodiode regime, which yields the spectral detectivity of 10^12 Jones.

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Methods for Studying Petroleum Porphyrins (Review)

Cited by 25 publications

References 103 publications

Chemistry of porphyrins in fossil plants and animals

Chemistry of porphyrins in fossil plants and animals

Influence of leaching parameters on the vanadium extraction from petroleum coke

An Indium Synthetic Etioporphyrin for Organic Electronics: Aggregation and Photoconductivity in Thin Films

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