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.
Papers published on a yearly basis
Papers
More filters
TL;DR: Results demonstrated that the size between targeted molecules and the cyclodextrin cavities strongly correlates with its ability to engage in complexation, which plays an important role in the inclusion complex formation as well as in the strength of the interaction between the molecules.
Abstract: Among various cavitand molecules, cyclodextrins are extensively studied due to their ability to form host-guest complexes with small hydrophobic molecules. Aiming to explore cyclodextrin implementation on the scopes related to the environmental pollution monitoring or remediation, extensive studies for understanding the cyclodextrin-based host-guest complex formation with selected targeted substances are conducted. In this context, two polycyclic aromatic hydrocarbons, naphthalene and fluoranthene as well as toluene as a member of volatile organic compounds, were studied regarding their ability to encapsulate into cyclodextrin cavities. Synthesised complexes were examined by thermogravimetric analysis combined with Raman spectroscopy. The obtained results demonstrated that the size between targeted molecules and the cyclodextrin cavities strongly correlates with its ability to engage in complexation. Thus, this latter parameter plays an important role in the inclusion complex formation as well as in the strength of the interaction between the molecules.
18 citations
Patent•
22 Feb 2000
TL;DR: In this paper, the problem of obtaining a new compound of a sulfur atom-containing aromatic hydrocarbon compound, and useful as a constituent material of an organic electroluminescence element having high thermal stability, high luminescent characteristics and a low drive voltage, was solved.
Abstract: PROBLEM TO BE SOLVED: To obtain a new compound of a sulfur atom-containing aromatic hydrocarbon compound, and useful as a constituent material of an organic electroluminescence element having high thermal stability, high luminescent characteristics and a low drive voltage. SOLUTION: This new compound is the one of formula I [An is a divalent group composed of a mono- to hexa-cyclic aromatic ring (substituted with one or more kinds of 1-30C alkyls and the like) or the like; Ar1 and Ar2 are each a single bond (with the proviso that the single bond is limited to one of Ar1 and Ar2, and in the case, the other is a sulfur atom-containing polyarylene comprising a heterocycle having two or more heterocycles), a 5-30C divalent group having sulfur atom, or the like; R1 to R4 are each a 6-20C aryl (substituted with one or more kinds of H, a 1-30C alkyl and the like), or the like], e.g. a compound of formula II. The compound of formula I is obtained by forming a compound of formula III (e.g. a compound of formula IV) into a Grignard reagent, and coupling the obtained Grignard reagent with a compound of the formula Br-An-Br (e.g. 9,10-dibromoanthracene).
18 citations
01 Dec 2003
TL;DR: In this paper, a new class of nonproteinogenic aromatic amino acids, benzoxazol-5-yl-alanine derivatives, possessing an aromatic hydrocarbon substituent in position 2 is described.
Abstract: A new class of nonproteinogenic aromatic amino acids, benzoxazol-5-yl-alanine derivatives, possessing an aromatic hydrocarbon substituent in position 2 is described. They characterize by long-wavelength absorption and emission bands, high molar absorption coefficient, high fluorescence quantum yield and short, compared to the parent methyl-substituted hydrocarbon, fluorescence lifetime. The MOPAC 2002 package with COSMO model of the solvent was used to calculate the structure of compounds studied in the ground and excited states in methanol, acetonitrile and methylcyclohexane. The position of the vertical absorption and emission transitions were calculated using a INDO/S method within a SCRF approximation for the solvent. The calculated absorption transitions agreed with the corresponding experimental values when all possible singly excited configuration were considered, while the emission–transition wavelengths were overestimated regardless the size of the active space.
18 citations
Patent•
20 Sep 1995
TL;DR: In this paper, a process for the removal of nitrogen compounds from an aromatic hydrocarbon stream comprising the nitrogen compounds by contacting the hydrocar stream with a selective adsorbent having an average pore size less than 5.5 Angstroms is described.
Abstract: This invention relates to a process for the removal of nitrogen compounds from an aromatic hydrocarbon stream comprising the nitrogen compounds by contacting the hydrocarbon stream with a selective adsorbent having an average pore size less than. about 5.5 Angstroms. The selective adsorbent is a molecular sieve selected from the group consisting of pore closed zeolite 4A, zeolite 4A, zeolite 5A, silicalite, F-silicalite, ZSM-5 and mixtures thereof. In one embodiment, the present invention comprises a combination of a fractionation zone and an adsorption zone wherein the feedstream is passed to the fractionation zone to provide a dry bottoms product stream essentially free of the nitrogen compounds and an overhead stream. The overhead stream is condensed to provide an aqueous stream and a hydrocarbon stream. The hydrocarbon stream is passed to an adsorption zone and a treated effluent recovered therefrom is returned to the fractionation zone. The invention provides significant cost advantages when the feedstream is subject to slugs or surges in levels of nitrogen compounds which can be detrimental to downstream catalyst as found in aromatic conversion reactions.
18 citations
Patent•
25 Dec 2002
TL;DR: In this paper, the amine compounds represented by general formulas (1, Ar 2, Ar 3 and Ar 4) are each a substituted or unsubstituted aromatic hydrocarbon group or a substituted/unsubstantiated aromatic heterocyclic group.
Abstract: PROBLEM TO BE SOLVED: To provide an amine compound which can suitably be used as a luminescent material for organic electroluminescent elements. SOLUTION: The amine compounds represented by general formulas (1) and/or (1') [Ar 1 , Ar 2 , Ar 3 and Ar 4 are each a substituted or unsubstituted aromatic hydrocarbon group or a substituted or unsubstituted aromatic heterocyclic group; Ar 1 and Ar 2 may be bound to each other to form a nitrogen-containing heterocyclic group; R is H, cyano, a halogen atom, a substituted or unsubstituted straight chain, branched or cyclic alkyl, a substituted or unsubstituted aromatic hydrocarbon, or a substituted or unsubstituted aromatic heterocyclic group; X is a divalent aromatic hydrocarbon or a divalent heterocyclic group], and the organic electroluminescent element between whose electrodes at least one layer containing at least one of the amine compounds represented by general formulas (1) and/or (1') is nipped. The amine compound is a luminescent material for organic electroluminescent elements which have low driving electric voltages, long luminescent lives, and excellent durability. COPYRIGHT: (C)2004,JPO&NCIPI
18 citations