Adamantane and diamantane; phase diagrams, solubilities, and rates of dissolution

Reiser, J.; Mcgregor, E.; Jones, James William; Enick, Robert M.; Holder, Gerald D.

doi:10.1016/0378-3812(95)02949-4

Cited by 52 publications

(31 citation statements)

References 3 publications

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“…For diamondoids analysis in crude oils/condensates, the sample was diluted with pentane in the concentration of 16 mg oil/ml pentane. The pentane was reported to be a good solvent for adamantanes and diamantanes in terms of high solubility and low boiling point (Reiser et al 1996). The oil solution was well homogenized in ultrasonic bath for at least 1 min.…”

Section: Gas Chromatography-mass Spectrometrymentioning

confidence: 99%

RETRACTED ARTICLE: Light hydrocarbon geochemistry: insight into oils/condensates families and inferred source rocks of the Woodford–Mississippian tight oil play in North-Central Oklahoma, USA

et al. 2020

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The Woodford-Mississippian "Commingled Production" is a prolific unconventional hydrocarbon play in Oklahoma, USA. The tight reservoirs feature variations in produced fluid chemistry usually explained by different possible source rocks. Such chemical variations are regularly obtained from bulk, molecular, and isotopic characteristics. In this study, we present a new geochemical investigation of gasoline range hydrocarbons, biomarkers, and diamondoids in oils from Mississippian carbonate and Woodford Shale. A set of oil/condensate samples were examined using high-performance gas chromatography and mass spectrometry. The result of the condensates from the Anadarko Basin shows a distinct geochemical fingerprint reflected in light hydrocarbon characterized by heptane star diagrams, convinced by biomarker characteristics and diamantane isomeric distributions. Two possible source rocks were identified, the Woodford Shale and Mississippian mudrocks, with a variable degree of mixing. Thermal maturity based on light hydrocarbon parameters indicates that condensates from the Anadarko Basin are of the highest maturity, followed by "Old" Woodford-sourced oils and central Oklahoma tight oils. These geochemical parameters shed light on petroleum migration within Devonian-Mississippian petroleum systems and mitigate geological risk in exploring and developing petroleum reservoirs.

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Section: Gas Chromatography-mass Spectrometrymentioning

confidence: 99%

RETRACTED ARTICLE: Light hydrocarbon geochemistry: insight into oils/condensates families and inferred source rocks of the Woodford–Mississippian tight oil play in North-Central Oklahoma, USA

et al. 2020

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“…The smallest of these species, adamantane C 10 H 16 , consists of only one diamond cage, followed by diamantane C 14 H 20 with two, and triamantane C 18 H 24 with three faced-fused cages. Diamondoids can be found in some natural gas reservoirs, and especially diamantane is one of the deposits in gas pipelines M.Steglich@web.de 1 Corresponding author (Reiser et al 1996). Lately, diamondoids consisting of up to 11 diamond cages were isolated from petroleum by Dahl et al (2003) making these species accessible to laboratory investigations.…”

Section: Introductionmentioning

confidence: 99%

Electronic Spectroscopy of Fuv-Irradiated Diamondoids: A Combined Experimental and Theoretical Study

Steglich¹,

Huisken²,

Dahl³

et al. 2011

ApJ

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Irradiation with high energy photons (10.2 − 11.8 eV) was applied to small diamondoids isolated in solid rare gas matrices at low temperature. The photoproducts were traced via UV absorption spectroscopy. We found that upon ionization the smallest of these species lose a peripheral H atom to form a stable closed-shell cation. This process is also likely to occur under astrophysical conditions for gas phase diamondoids and it opens the possibility to detect diamond-like molecules using their rotational spectrum since the dehydrogenated cations possess strong permanent dipole moments. The lowest-energy electronic features of these species in the UV were found to be rather broad, shifting to longer wavelengths with increasing molecular size. Calculations using time-dependent density functional theory support our experimental findings and extend the absorption curves further into the vacuum ultraviolet. The complete σ − σ * spectrum displays surprisingly strong similarities to meteoritic nanodiamonds containing 50 times more C atoms.

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“…The fact that the loss of C 3 H 7 , C 4 H 8 and C 2 H 4 share the same rate limiting transition is implicitly taken into account in the RRKM model. The barriers for CH 3 and H-loss are used as fit parameters, while the common barrier is varied such that the error in the fit is minimised. The normal mode frequencies of the common transition state leading to C 3 H 7 , C 4 H 8 and C 2 H 4 are treated independently and are used as fit parameters that statistically determine the branching amongst these channels.…”

Section: Statistical Modellingmentioning

confidence: 99%

“…1,2 On Earth, small diamondoids are found in natural gas reservoirs and are abundant in gas pipeline deposits. 3 Recently, larger diamondoids have been isolated from petroleum, 4 triggering experimental studies to elucidate the properties of these molecules that bridge the gap between hydrocarbons and nano-sized diamond crystals. The discovery of small (2-3 nm) nanodiamonds in meteorites 5 drew the attention of astronomers and geologists to this material.…”

Section: Introductionmentioning

confidence: 99%

Dissociative ionisation of adamantane: a combined theoretical and experimental study

Candian

Bouwman

Hemberger

et al. 2018

Phys. Chem. Chem. Phys.

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aDiamond nanoparticles, or nanodiamonds, are intriguing carbon-based materials which, maybe surprisingly, are the most abundant constituent of presolar grains. While the spectroscopic properties of even quite large diamondoids have already been explored, little is known about their unimolecular fragmentation processes. In this paper we characterise the dissociative ionisation of adamantane (C 10 H 16 ) -the smallest member of the diamondoid family -utilising imaging Photoelectron Photoion Coincidence (iPEPICO) spectroscopy and Density Functional Theory (DFT) calculations. We have found adamantane to dissociatively photoionise via several parallel channels of which H, C 3 H 7 and C 4 H 8 losses are the most important ones. Calculations confirm the existence of a rate-limiting transition state for the multiple C-loss channels, which is located at 10.55 eV with respect to neutral adamantane. In addition, we found dissociation channels leading to small cationic hydrocarbons, which may be relevant in the interstellar medium.

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Adamantane and diamantane; phase diagrams, solubilities, and rates of dissolution

Cited by 52 publications

References 3 publications

RETRACTED ARTICLE: Light hydrocarbon geochemistry: insight into oils/condensates families and inferred source rocks of the Woodford–Mississippian tight oil play in North-Central Oklahoma, USA

RETRACTED ARTICLE: Light hydrocarbon geochemistry: insight into oils/condensates families and inferred source rocks of the Woodford–Mississippian tight oil play in North-Central Oklahoma, USA

Electronic Spectroscopy of Fuv-Irradiated Diamondoids: A Combined Experimental and Theoretical Study

Dissociative ionisation of adamantane: a combined theoretical and experimental study

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