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Articles 481 - 490 of 490
Full-Text Articles in Physical Sciences and Mathematics
Solving Chemical Problems Of Environmental Importance Using Cavity Ring-Down Spectroscopy, Dean B. Atkinson
Solving Chemical Problems Of Environmental Importance Using Cavity Ring-Down Spectroscopy, Dean B. Atkinson
Chemistry Faculty Publications and Presentations
Cavity ring-down (CRD) is a sensitive variant of traditional absorption spectroscopy that has found increasing use in a number of chemical measurement applications. This review focuses on applications of cavity ring-down spectroscopy that will be of interest to environmental chemists and analytical chemists working on environmental problems. The applications are classified into direct monitoring approaches, indirect analysis methods and ancillary studies and a differentiation is made between field-tested instruments and proof of principle studies.
Synthesis And Characterization Of A Polypyridyl Ru(Ii)-Alloxazine Complex For Adsorption On Tio2-Coated Ito Electrodes, Manisha A. Patel
Synthesis And Characterization Of A Polypyridyl Ru(Ii)-Alloxazine Complex For Adsorption On Tio2-Coated Ito Electrodes, Manisha A. Patel
Masters Theses
TiO2-coated conducting glass electrodes can be modified by attachment of redox-active molecules to the TiO2 surface. This thesis describes the synthesis and characterization of a polypyridyl Ru(II) complex that can be covalently bound to a TiO2 surface through the carboxylate groups of 2,2'-bipyridine-4,4' -dicarboxylic acid, H2dcbpy. In addition, the bound complex contains a redox-active alloxazine derivative, pptd, which is capable of 2e-/2H+ transfers. Thus the TiO2-coated electrode is modified with a transition metal complex capable of shuttling H-atoms to substrates in solution. Synthesis of the PF6- salt …
Comparison Between Hydrogen And Dihydrogen Bonds Among H3bnh3, H2bnh2, And Nh3, T. Kar, Steve Scheiner
Comparison Between Hydrogen And Dihydrogen Bonds Among H3bnh3, H2bnh2, And Nh3, T. Kar, Steve Scheiner
Chemistry and Biochemistry Faculty Publications
Several possible binary complexes among ammonia-borane, aminoborane, and ammonia, via hydrogen and/or dihydrogen bonds, have been investigated to understand the effect of different hybridization. Møller–Plesset second-order perturbation theory with aug-cc-pVDZ basis set was used. The interaction energy is corrected for basis set superposition error, and the Morokuma–Kitaura method was employed to decompose the total interaction energy. Like H3BNH3, the sp2 hybridized H2BNH2 also participates in H- and dihydrogen bond formation. However, such bonds are weaker than their sp3 analogs. The contractions of BN bonds are associated with blueshift in …
Approaches To The Synthesis Of Novel Triptycene Dendrimers And Hyperbranched Poly(Phenylene Sulfides) And Poly(Phenylene Sulfones), Alfredo Mellace
Approaches To The Synthesis Of Novel Triptycene Dendrimers And Hyperbranched Poly(Phenylene Sulfides) And Poly(Phenylene Sulfones), Alfredo Mellace
Seton Hall University Dissertations and Theses (ETDs)
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Investigation Of Model Cell Membrane Disruption Via Fluorescence And Light Scattering Techniques, Imara Charles
Investigation Of Model Cell Membrane Disruption Via Fluorescence And Light Scattering Techniques, Imara Charles
Seton Hall University Dissertations and Theses (ETDs)
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Chlorobenzenes And Chloronitrobenzenes Interaction With Iron (O), Manuel Alejandro Serratos
Chlorobenzenes And Chloronitrobenzenes Interaction With Iron (O), Manuel Alejandro Serratos
Masters Theses
Degradation of chlorobenzene, dichlorobenzenes and chloronitrobenzenes (ClB, x-Cl2B and x-ClNO2B) was tested by trying to make them react with metallic iron, Fe (0), in water solvent.
The experiments consisted of optimizing the parameters of the reactions (like minimum mass of iron needed) and analytical detection conditions. Analytical techniques used were gas and liquid chromatography (GC and HPLC), mass spectrometry (MS) and UV-Vis spectroscopy.
No substances other than the initial ClB and x-Cl2B were detected in their tests with Fe (0) after shaking for periods of up to three days, although 10%weight average decreases in concentration were observed.
The ClNO2B isomers …
Dmap As A Catalyst For Carbon Acylation: Elucidation Of Mechanistic Pathway, Including Spectral Characterization Of The Putative Reactive Intermediate, Jagadish K. Boppisetti
Dmap As A Catalyst For Carbon Acylation: Elucidation Of Mechanistic Pathway, Including Spectral Characterization Of The Putative Reactive Intermediate, Jagadish K. Boppisetti
Masters Theses
3-Phenylbenzofuranone, when deprotonated with sodium hydride, forms an extended enolate system which, when treated with excess alkyl chloroformates, affords only oxygen-acylated products, as opposed to the usually desired carbon-functionalized derivatives. It was discovered that such molecules, when treated with a catalytic amount of 4- (N, N-dimethylamino)pyridine (DMAP), rearrange quantitatively to the carbon acylated isomers.
These migrations, which are accompanied by a deep blue color, are proposed to involve a reactive intermediate. This intermediate, which is postulated as an ion pair charge transfer (IPCT) complex, has been closely studied in order to gain a better understanding of the …
Bismuth Compounds In Organic Synthesis. Synthesis Of Resorcinarenes Using Bismuth Triflate, Ram S. Mohan, Katherine E. Peterson, Russell C. Smith
Bismuth Compounds In Organic Synthesis. Synthesis Of Resorcinarenes Using Bismuth Triflate, Ram S. Mohan, Katherine E. Peterson, Russell C. Smith
Ram S. Mohan
Bismuth Compounds In Organic Synthesis. Deprotection Of Ketoximes Using Bismuth Bromide-Bismuth Triflate, Ram S. Mohan, Joshua N. Arnold, Patrick D. Hayes, Robert L. Kohaus
Bismuth Compounds In Organic Synthesis. Deprotection Of Ketoximes Using Bismuth Bromide-Bismuth Triflate, Ram S. Mohan, Joshua N. Arnold, Patrick D. Hayes, Robert L. Kohaus
Ram S. Mohan
Reactions Of Boranes And Metallaboranes With Phosphines, Lawrence Barton, Oleg Volkov, Mitsuhiro Hata, Paul Mcquade, Nigam P. Rath