Characterization of multicomponent mixtures of polynuclear aromatic hydrocarbons with .alpha.-cyclodextrin-induced solid-surface room-temperature luminescence

1988 ◽  
Vol 60 (13) ◽  
pp. 1285-1290 ◽  
Author(s):  
J. M. Bello ◽  
R. J. Hurtubise
Keyword(s):  
Solid Surface ◽  
Aromatic Hydrocarbons ◽  
Room Temperature ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Multicomponent Mixtures ◽  
Room Temperature Luminescence

Room-Temperature Luminescence of a Variety of Compounds on 1% α-Cyclodextrin/NaCl Mixture

1989 ◽  
Vol 43 (5) ◽  
pp. 810-812 ◽  
Author(s):  
Marsha D. Richmond ◽  
Robert J. Hurtubise
Keyword(s):  
Solid Surface ◽  
Room Temperature ◽  
Lower Cost ◽  
Model Compounds ◽  
Figures Of Merit ◽  
Room Temperature Luminescence ◽  
Analytical Figures Of Merit

With the use of model compounds of widely different functionality, it was found that a 1% α-cyclodextrin/NaCl mixture could be used in place of an 80% α-cyclodextrin/NaCl mixture to obtain solid surface room-temperature fluorescence (RTF) and phosphorescence (RTP) data. Analytical figures of merit are reported for four compounds. The use of a smaller percentage of α-cyclodextrin results in lower cost; no loss of analytical integrity, compared with that for an 80% α-cyclodextrin/NaCl mixture; and easier handling of the α-cyclodextrin/NaCl mixtures.

Total solid-surface room-temperature luminescence for analysis of mixtures

1984 ◽  
Vol 56 (6) ◽  
pp. 913-918 ◽  
Author(s):  
V. P. Senthilnathan ◽  
R. J. Hurtubise
Keyword(s):  
Solid Surface ◽  
Room Temperature ◽  
Total Solid ◽  
Room Temperature Luminescence

scholarly journals Structural characterization of two solvates of a luminescent copper(II) bis(pyridine)-substituted benzimidazole complex

2017 ◽  
Vol 73 (11) ◽  
pp. 1616-1621 ◽  
Author(s):  
David K. Geiger ◽  
Matthew R. DeStefano ◽  
Robert A. Lewis
Keyword(s):  
Absorption Spectrum ◽  
Biological Activity ◽  
Room Temperature ◽  
Bond Distance ◽  
Ligand Field ◽  
Asymmetric Unit ◽  
Square Planar ◽  
Pharmaceutical Uses ◽  
Room Temperature Luminescence

Copper(II) complexes of benzimidazole are known to exhibit biological activity that makes them of interest for chemotherapeutic and other pharmaceutical uses. The complex bis(acetato-κO){5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)methyl]-1H-benzimidazole-κ2N2,N3}copper(II), has been prepared. The absorption spectrum has features attributed to intraligand and ligand-field transitions and the complex exhibits ligand-centered room-temperature luminescence in solution. The acetonitrile monosolvate, [Cu(C2H3O2)2(C20H18N4)]·C2H3N (1), and the ethanol hemisolvate, [Cu(C2H3O2)2(C20H18N4)]·0.5C2H6O (2), have been structurally characterized. Compound2has two copper(II) complexes in the asymmetric unit. In both1and2, distorted square-planar N2O2coordination geometries are observed and the Cu—N(Im) bond distance is slightly shorter than the Cu—N(py) bond distance. Intermolecular π–π interactions are found in1and2. A weak C—H...π interaction is observed in1.

scholarly journals Characterization of a Sinorhizobium Isolate and Its Extracellular Polymer Implicated in Pollutant Transport in Soil

2002 ◽  
Vol 68 (1) ◽  
pp. 423-426 ◽  
Author(s):  
J. Janecka ◽  
M. B. Jenkins ◽  
N. S. Brackett ◽  
L. W. Lion ◽  
W. C. Ghiorse
Keyword(s):  
Aromatic Hydrocarbons ◽  
Sinorhizobium Meliloti ◽  
Lipid Fraction ◽  
Extracellular Polysaccharide ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Lead And Cadmium ◽  
Hydrophobic Pollutants ◽  
Biolog Analysis ◽  
Extracellular Polymer

ABSTRACT A bacterium isolated from soil (designated 9702-M4) synthesizes an extracellular polymer that facilitates the transport of such hydrophobic pollutants as polynuclear aromatic hydrocarbons, as well as the toxic metals lead and cadmium in soil. Biolog analysis, growth rate determinations, and percent G+C content identify 9702-M4 as a strain of Sinorhizobium meliloti. Sequence analysis of a 16S rDNA fragment gives 9702-M4 a phylogenetic designation most closely related to Sinorhizobium fredii. The extracellular polymer of isolate 9702-M4 is composed of both an extracellular polysaccharide (EPS) and a rough lipopolysaccharide. The EPS component is composed mainly of 4-glucose linkages with monomers of galactose, mannose, and glucuronic acid and has pyruval and acetyl constituents. The lipid fraction and the negative charge associated with carbonyl groups of the exopolymer are thought to account for the binding of polynuclear aromatic hydrocarbons and cationic metals.

Determination of terbium with solid surface room temperature luminescence optosensing

1996 ◽  
Vol 322 (3) ◽  
pp. 167-171 ◽  
Author(s):  
Wei Shoulian ◽  
Lu Jianzhong ◽  
Zhang Zhujun
Keyword(s):  
Solid Surface ◽  
Room Temperature ◽  
Room Temperature Luminescence
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