1,087 research outputs found
An Investigation of Supramolecular Interactions in some Electronically Active Organic and Organometallic Materials
No full textThe opening section of this thesis reviews the application of the concepts of supramolecular chemistry to the control of the solid-state behaviour of organic and organometallic materials. The application of these concepts to our understanding of (i) electronically active salts based on TCNQ and its analogues; and (ii) simple 2,6-disubstituted pyridine derivatives is then reported.Two series of salts have been prepared based on (a) the Mn+ (mnt2-)2) anion and (b) on radialene and triazine analogues of TCNQ.- (TCNQ = 7,7,8,8-tetracyanoquinodimethane). For both these series, counter cations chosen for study were either (i) simple ammonium and pyridinium cations; (ii) cyaninium cations or (iii) ionophore-encapsulated alkali metal cations. Detailed comparison of the solid-state behaviour of these materials has revealed that in addition to electrostatic association, specific C-H......X interactions play an important structure forming role.In a parallel study C-H......X interactions have been found to play a crucial role in the solid-state behaviour of pyridine 2,6-dicarboxylate esters, where a triple interaction of this type leads to the formation of infinite tapes in the solid-state. This contact, a novel supramolecular synthon, is insensitive to the nature of the ester side arms. Preliminary studies on the effect of modifying the nature of this contact are also reported. The analogous pyridine 2,6-dicarboxamides do not show this phenomenon, but prefer a U-shaped conformation which is shown to be ideal for metal ion complexation. In particular 2,6-bis-N,N-(2-pyridylmethyl) pyridine dicarboxamide reacts with nickel (II) and copper (II) to form neutral complexes, which in the latter case are helical. However with cobalt (III) a 2:1 ligand-to-metal complex is formed.</p
Mrs. Neil R. Ferguson, bride
No full textMiss Wanda Louise Kirkpatrick, daughter of Mr. and Mrs. Foy Kirkpatrick, 700 Springer Avenue, was married to Neil Ray Ferguson, 4314 Bowman Springs road, in a recent ceremony at the home of the officiating minister, Carl Smith, in Weatherford. The bridegroom\u27s sister, Mrs. Billy Horton, Mr. Horton and Charles Rainey attended the couple. The bride wore a coral-colored Knit suit with black accessories and an orchid corsage. The couple are residing at the Bowman Springs Road address.https://mavmatrix.uta.edu/specialcollections_startelegram1950s/23867/thumbnail.jp
Liberating data: how libraries and librarians can help researchers with text and data mining.
No full textWith advances in computational methods and the proliferation of data sources, text and data mining offers exciting new directions for research. Neil Stewart, Jane Secker, Chris Morrison and Laurence Horton look at the role of libraries in providing support to researchers for these projects, particularly to help with rights issues and to digitise material for scholarly re-use. Librarians should be bold about the advice they give to researchers and encourage them to use the new copyright exceptions
Self-assembly into infinite tapes by 2,7-disubstituted-1,8-naphthyridines in the solid state
No full text2,7-Disubstituted-1,8-naphthyridine derivatives have been found to self-assemble into infinite 1-D tapes in the solid state in a manner similar to that seen previously for their 2,6-disubstituted pyridine analogues.<br/
Methoxy-phenyl groups reduce the cytotoxicity and increase the aqueous solubility of phosphonium zwitterions and salts
No full textThe ability of phosphonium cations to act as intracellular transport vectors is well-established. Previous research has demonstrated that phosphonioalkylthiosulfate zwitterions, and -thioacetylalkylphosphonium salts are useful precursors for the formation of phosphonium-functionalised gold nanoparticles and enable the nanoparticles to be transported into cells for diagnostic and therapeutic purposes.
In this report we describe the synthesis and characterisation of a series of phosphonioalkylthiosulfate zwitterions, and-thioacetylalkylphosphonium salts derived from the methoxy-phenylphosphines tris(2,4,6-trimethoxyphenyl)phosphine, tris(2,6-dimethoxyphenyl)phosphine and tri(4-methoxyphenyl)phosphine. The methoxyphenyl-substituted phosphonium compounds show greater solubility in aqueous systems than the corresponding phenyl derivatives and cytotoxicity studies reveal that the compounds are significantly less toxic than the related triphenylphosphonium derivatives.
The solid-state structures of the tris(2,4,6-trimethoxyphenyl)- and tris(2,6-dimethoxyphenyl)-phosphoniopropylthiosulfate zwitterions have been investigated by single crystal X-ray crystallography. The differences in the molecular packing of the compounds may account for greater solubility of these zwitterions in aqueous solutions
Ivor Horton's Beginning Visual C++ 2005
No full textPopular author Ivor Horton uses his trademark approachable writing style to provide novice programmers with the basic tools as they learn Visual C++ 200
Past and future sea-level rise along the coast of North Carolina, USA
No full textWe evaluate relative sea level (RSL) trajectories for North Carolina, USA, in the context of tide-gauge measurements and geological sea-level proxy reconstructions spanning the last ∼11,000 years. RSL rise was fastest (∼7 mm/yr) during the early Holocene and slowed over time with the end of the deglaciation. During the pre-Industrial Common Era (i.e., 0–1800 CE), RSL rise (∼0.7 to 1.1 mm/yr) was driven primarily by glacio-isostatic adjustment, though dampened by tectonic uplift along the Cape Fear Arch. Ocean/atmosphere dynamics caused centennial variability of up to ∼0.6 mm/yr around the long-term rate. It is extremely likely (probability P = 0.95) that 20th century RSL rise at Sand Point, NC, (2.8 ± 0.5 mm/yr) was faster than during any other century in at least 2,900 years. Projections based on a fusion of process models, statistical models, expert elicitation, and expert assessment indicate that RSL at Wilmington, NC, is very likely (P = 0.90) to rise by 42–132 cm between 2000 and 2100 under the high-emissions RCP 8.5 pathway. Under all emission pathways, 21st century RSL rise is very likely (P > 0.90) to be faster than during the 20th century. Due to RSL rise, under RCP 8.5, the current ‘1-in-100 year’ flood is expected at Wilmington in ∼30 of the 50 years between 2050-2100.The final publication is available at Springer via http://dx.doi.org/10.1007/s10584-015-1451-xPeer reviewe
Quiet Power: The Plays and Films of Horton Foote
No full textProfessor Laurin Porter, a nationally recognized Foote scholar, and author of Orphan\u27s Home: The Voice and Vision of Horton Foote, will discuss his contributions to both film and stage form at the October Focus on Faculty meeting from 12- 1:30pm in the Central Library parlor. Using clips from some of his best known works, including To Kill a Mockingbird and The Trip to Bountiful, Porter will introduce listeners to the world of Horton Foote, a celebrated Texas writer
Robert Horton and abrupt rises of groundwater.
No full textThere are 94 boxes of the scientific papers of Robert E. Horton's papers in the US National Archives. In Box 71, there are copies of letters exchanged between LeRoy K. Sherman, Consulting Engineer of Chicago, IL (and author of the classic paper on the unitgraph) and Robert E. Horton, Consulting Hydraulic Engineer of Voorheesville, NY, concerning rapid rises of groundwater levels in near-stream wells and their relationship to the storm hydrograph. They provide an interesting insight into the views of both Sherman and Horton on controls on stream flow generation, and the relationship between Horton and other hydrologists. Horton's analysis of subsurface flow processes and saturated areas anticipates later analyses of topographic controls on hydrological responses
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MISAME
No full textRecording of Neil Rolnick's Gate Beats. This work consists of sound samples taken from the song "No War Blues" by the composers improvisational band, Fish Love That. These samples were put together to create a new piece that presents a variety of changing and morphing meters and patterns. During live performances, the composer will slowly lower a noise gate on each sample to create new patterns
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