Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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22 Jul 1999TL;DR: In this article, the authors used improved asymmetric membranes for selective separation of aromatic and non-aromatic hydrocarbons in a feed stream using a polyimide and a lubricating oil.
Abstract: Selectively permeable separation of aromatic hydrocarbons from non-aromatic hydrocarbons in a feed stream is accomplished using improved asymmetric membranes. The preferred membranes are fashioned from a polyimide and conditioned with a lubricating oil. Feed streams containing a mixture of aromatic and non-aromatic hydrocarbons are contacted with the dense active layer side of the polyimide membrane under a pressure and temperature sufficient to selectively permeate the desired aromatic hydrocarbon.
46 citations
TL;DR: In this paper, the positions of 20 aromatic polycyclic hydrocarbons have been calculated by the semi-empirical limited configuration interaction method in a π −electron approximation using Huckel's molecular orbitals.
Abstract: The positions of p‐bands of 20 aromatic polycyclic hydrocarbons have been calculated by the semiempirical limited configuration interaction method in a π‐electron approximation using Huckel's molecular orbitals. The agreement with experimental values is very good. The effect of the extent of configuration interaction has been studied. It has been demonstrated that the contribution of electron repulsion integrals is nearly constant within this class of hydrocarbons. The failure of the approximation of Huckel in the studies of spectra of compounds with conjugated double bonds belonging to different classes of hydrocarbons, has been explained by the fact that the contribution of electron repulsion integrals is larger with polyenes and considerably smaller with tropylium and its benzoderivatives. The usefulness of the approximation of Huckel within one class of compounds is demonstrated by a comparison of the experimental and theoretical (according to Huckel) positions of the lowest energy absorption maximum of the aromatic hydrocarbon derivatives.
45 citations
TL;DR: In this paper, the effect of mild hydrogenation on the cracking behavior of bio-oil model compound mixture was studied in detail based on the two-stage fixed-bed reactor.
45 citations
TL;DR: Az-BN-1 and Az-BN -2 exhibit unexpected deboronization upon addition of trifluoroacetic acid, which distinguishes them from other reported BN-heteroaromatics and can be ascribed to the unique property of azulene unit.
Abstract: Azulene, a nonalternant bicyclic aromatic hydrocarbon, has unique chemical and physical properties and is considered to be a promising building block for constructing novel polycyclic aromatic hydrocarbons (PAHs) and heteroaromatics. We present here the first two azulene-based BN-heteroaromatics Az-BN-1 and Az-BN-2. The chemical structures and optical and electrochemical properties of both compounds have been investigated, as well as their sensing behavior in response to fluoride ion. Az-BN-1 and Az-BN-2 show different photophysical properties from other reported BN-embedded PAHs, such as lower band gaps and unusual fluorescence. In addition, Az-BN-1 and Az-BN-2 exhibit unexpected deboronization upon addition of trifluoroacetic acid, which distinguishes them from other reported BN-heteroaromatics and can be ascribed to the unique property of the azulene unit.
45 citations
45 citations