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in subjects: "Aromatics"  
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Simultaneously Bound Guests and Chiral Recognition: A Chiral Self-Assembled Supramolecular Host Encapsulates Hydrophobic Guests

Description: Driven by the hydrophobic effect, a water-soluble, chiral, self-assembled supramolecular host is able to encapsulate hydrophobic organic guests in aqueous solution. Small aromatics can be encapsulated in the supramolecular assembly, and the simultaneous encapsulation of multiple guests is observed in many cases. The molecular host assembly is able to recognize different substitutional isomers of disubstituted benzenes with ortho substitution leading to the encapsulation of two guests, but meta … more
Date: March 6, 2008
Creator: Hastings, Courtney J.; Pluth, Michael D.; Biros, Shannon M.; Bergman, Robert G. & Raymond, Kenneth N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups

Description: The effect of intermolecular {pi}-{pi} stacking on the electrical and mechanical properties of monolayer films molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA) were used as model systems with different {pi}-{pi} stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than one order of… more
Date: September 6, 2007
Creator: Fang, Liang; Park, J.Y.; Ma, H.; Jen, A.K.-Y. & Salmeron, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Techniques for the generation and monitoring of vapors

Description: Controlled test atmospheres can be produced using a variety of techniques. Gases are usually generated by using flow dilution methods while vapors are produced by using solvent injection and vaporization, saturation, permeation and diffusion techniques. The resulting gas mixtures can be monitored and measured using flame ionization, photoionization, electrochemical and infrared analytical systems. An ideal system for the production of controlled test atmospheres would not only be able to genera… more
Date: February 6, 1981
Creator: Nelson, G.O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nuclear Spin Statistics of extended aromatic C48N12 Azafullerene

Description: We have presented the nuclear spin statistics of the novel extended aromatic C{sub 48}N{sub 12} azafullerene. The nuclear spin multiplets and statistical weights of {sup 14}N spin-1 bosons are provided. In addition we have also provided the {sup 13}C nuclear spin species and spin statistical weights of {sup 13}C{sub 48}N{sub 12}. The spin statistical weights and spin species show that the presence of {sup 14}N nuclei in the aromatic fullerene can provide unique experimental opportunity to inves… more
Date: May 6, 2004
Creator: Balasubramanian, K
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Efficient Route to Highly Water-Soluble Aromatic Cyclic Hydroxamic Acid Ligands

Description: 2-Hydroxyisoquinolin-1-one (1,2-HOIQO) is a new member of the important class of aromatic cyclic hydroxamic acid ligands which are widely used in metal sequestering applications and metal chelating therapy. The first general approach for the introduction of substituents at the aromatic ring of the chelating moiety is presented. As a useful derivative, the highly water-soluble sulfonic acid has been synthesized by an efficient route that allows general access to 1,2-HOQIO 3-carboxlic acid amides… more
Date: February 6, 2008
Creator: Seitz, Michael & Raymond, Kenneth N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hydrogen Separation Membranes for Vision 21 Fossil Fuel Plants

Description: Eltron Research and team members CoorsTek, McDermott Technology, Sued Chemie, Argonne National Laboratory, and Oak Ridge National Laboratory are developing an environmentally benign, inexpensive, and efficient method for separating hydrogen from gas mixtures produced during industrial processes, such as coal gasification. This objective is being pursued using dense membranes based in part on Eltron-patented ceramic materials with a demonstrated ability for proton and electron conduction. The te… more
Date: November 6, 2001
Creator: Roark, Shane E.; Mackay, Richard & Sammells, Anthony F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Low severity upgrading of F-T waxes with solid superacids. Quarterly report, January 1995--March 1995

Description: In this quarter we studied the effect of hydrogen pressure, and of sulfur and nitrogen containing compounds on the isomerization and hydrocracking of n-hexadecane using a Pt/ZrO{sub 2}/SO{sub 4} catalyst. The reactions were carried out at 300{degrees}C and hydrogen pressures between 50 and 500 psig. Increasing hydrogen pressure resulted in increased conversion and increased hydrocracking. Nitrogen containing compounds had a greater inhibiting effect on the conversion of n-hexadecane than sulfur… more
Date: April 6, 1995
Creator: Tierney, J. W. & Wender, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics and mechanism of desulfurization and denitrogenation of coal-derived liquids. Seventh quarterly report, December 21, 1976--March 20, 1977. [CoO--MoO3 and NiO--MoO3]

Description: Three high-pressure flow microreactors and two batch autoclave reactors have been used to study the reaction networks and kinetics of (1) catalytic hydrodesulfurization of dibenzothiophene and methyl-substituted dibenzothiophenes and (2) catalytic hydrodenitrogenation of acridine. The catalysts were commercial, sulfided CoO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/ and commercial, sulfided NiO-MoO/sub 3//..gamma..-Al/sub 2/O/sub 3/. At 300/sup 0/C and 104 atm, dibenzothiophene reacts to give H/sub… more
Date: April 6, 1977
Creator: Gates, B. C.; Katzer, J. R.; Olson, J. H.; Kwart, H. & Stiles, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization and reactivity of organic monolayers on gold and platinum surfaces

Description: Purpose is to understand how the mobilization, dielectric, orientation, composition, coverage, and structure of self-assembled organic monolayers on metal surfaces affects the surface reactivities and properties of these films in order to facilitate the construction of desired films. Two model systems were used: tiols at Au and aromatic acids at Pt. Surface analysis methods, including contact angle, electrochemistry, ellipsometry, infrared reflection absorption spectroscopy (IRRAS), and x-ray p… more
Date: December 6, 1995
Creator: Wu, Chien-Ching
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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