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Articles 1 - 10 of 10
Full-Text Articles in Other Chemistry
Molecular Probes For The Detection Of Zn2+ And Fe3+ Ions, Erendra Manandhar
Molecular Probes For The Detection Of Zn2+ And Fe3+ Ions, Erendra Manandhar
Dissertations
A number of molecular probes have been designed and synthesized for the detection of Zn2+ and Fe3+ ions. Two types of functional groups have been incorporated into the molecular scaffolds to utilize different fluorescent mechanisms. The first class of receptors contains a pyrene moiety. These molecular probes use the excimer mechanism for the detection of Zn2+ ion. The probes work well in an organic solvent with a detection limit of 20 nM (one ppb). Alternatives are made to make them water soluble, but this proved to be difficult. An interesting ion-induced self-assembly system will also be discussed. …
Receptor For Fluorescence Sensing Of Organic Acid And Method Of Preparation Thereof (유기산 형광 인지 수용체 및 이의 제조방법), Hong Seok Kim, Md Wasi Ahmad
Receptor For Fluorescence Sensing Of Organic Acid And Method Of Preparation Thereof (유기산 형광 인지 수용체 및 이의 제조방법), Hong Seok Kim, Md Wasi Ahmad
Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)
The invention relates to the receptor it is the novel cholestane -based fluorescence which selectively reacts to the organic acid the pyrene group is bound as the fluorescence having the selectivity in the organic acid the receptor and a manufacturing method thereof in the imidazole -based cholestane introducing the imidazole to more detailed cholestane skeleton and manufacturing method thereof. By showing the organic acid, especially, the oxalic acid and high binding affinity the receptor has the effect that it selectively senses and the receptor can use in the sensing of the oxalic acid whether it is the imidazole -based cholestane …
Developing Spatial Reasoning Skills In General Chemistry Students, Deborah L. Carlisle
Developing Spatial Reasoning Skills In General Chemistry Students, Deborah L. Carlisle
Doctoral Dissertations
The study of organic chemistry requires the understanding and use of spatial relationships, which can be challenging for many students. Prior research has shown that there is a need to develop students’ spatial reasoning skills. To that end, this study implemented guided activities designed to strengthen students’ spatial skills, with the aim of preparing students for organic chemistry and other future STEM courses. Students, taking the second semester of a two-semester general chemistry course, engaged in these activities. This study followed a quasi experimental design, in which the experimental (n = 209) and the control group (n = 212) were …
Heat Release Of Polyurethanes Containing Potential Flame Retardants Based On Boron And Phosphorus Chemistries, Vladimir Benin, Bastien Gardelle, Alexander Morgan
Heat Release Of Polyurethanes Containing Potential Flame Retardants Based On Boron And Phosphorus Chemistries, Vladimir Benin, Bastien Gardelle, Alexander Morgan
Chemistry Faculty Publications
Using a polyurethane of methylene diphenyl isocyanate and 1,3-propane diol, several new non-halogenated aromatic boron and phosphorus flame retardants were evaluated for heat release reduction potential using the pyrolysis combustion flow calorimeter (PCFC). The polyurethanes were prepared in the presence of the potential flame retardants via solvent mixing and copolymerization methods, and were then analyzed via spectroscopic methods to determine if the flame retardant was still present in the final product. PCFC testing on the resulting products showed that the flame retardant molecule can have different effects on heat release depending upon how it is mixed into the polyurethane. Some …
Determination Of Corrosion Inhibitor Lubricity Improver In Jet Fuel By Liquid Chromatography-Electrospray Ionization Mass Spectrometry, David W. Johnson, Milissa Flake, Ryan Adams
Determination Of Corrosion Inhibitor Lubricity Improver In Jet Fuel By Liquid Chromatography-Electrospray Ionization Mass Spectrometry, David W. Johnson, Milissa Flake, Ryan Adams
Chemistry Faculty Publications
Military jet fuel (JP-8) is very similar to commercial jet fuel (Jet A) except for the presence of three additives, fuel system icing inhibitor, corrosion inhibitor–lubricity improver (CI-LI), and antistatic additive, which are added to improve characteristics of JP-8. Of particular interest is the CI-LI additive; the most common active ingredient is a dimer of linoleic acid. This article focuses on quantification of the active ingredient in the CI-LI additive by liquid chromatography–mass spectrometry (LC–MS). This method will allow the determination of CI-LI content in military jet fuel samples.
Pyrene Appended Imidazole Compound And Selective Fluorescence Sensing Of Aromatic Carboxylic Acids Using The Same (파이렌-이미다졸기가 연결된 화합물 및 이를 이용한 방향족 카르복실산의 선택적 형광인지), Hong Seok Kim, Md Wasi Ahmad
Pyrene Appended Imidazole Compound And Selective Fluorescence Sensing Of Aromatic Carboxylic Acids Using The Same (파이렌-이미다졸기가 연결된 화합물 및 이를 이용한 방향족 카르복실산의 선택적 형광인지), Hong Seok Kim, Md Wasi Ahmad
Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)
The invention relates to the novel compound and the manufacturing method thereof, and the benzoic acid derivative and the salicylic acid derivative composition for detecting using the same. The novel compound of the present invention is comprised of the pyrene and imidazole. And it hydrogen-bonds with the compound which the imidazole part detects. It interacts with the benzene ring and strong π - π of the compound which the pyrene part detects and the fluorescence intensity is changed the aromatic carboxylic acid can be recognized.
Science Classics, Mark Masthay
Science Classics, Mark Masthay
Chemistry Faculty Publications
An essay on the impact of the works in the Imprints and Impressions: Milestones in Human Progress, an exhibition of rare books from the collection of Stuart Rose. Exhibition was held Sept. 29-Nov. 9, 2014, at the University of Dayton.
Investigations Into The Fluorescent Covalent Labeling Of Biomolecules Utilizing Rhodamine Dyes, Electrophilic Leaving Groups And Mrna Display., Susan D. Selaya
Investigations Into The Fluorescent Covalent Labeling Of Biomolecules Utilizing Rhodamine Dyes, Electrophilic Leaving Groups And Mrna Display., Susan D. Selaya
Theses and Dissertations
The discovery of a method by which proteins of interest can selectively be labeled with a probe of choice intracellularly is a longstanding goal in chemical biology research. Conventional labeling techniques have utilized large domain tags but despite the development of small labeling molecules there have been no short peptide sequences known to covalently label a small molecule without the aid of an enzymatic process or metal chelation. We aimed to find a sequence of nucleophilic peptides that reacted covalently and specifically with electrophilic small labeling molecules using mRNA display. Our goal was to show that an electrophilic small labeling …
Stereoselective Synthesis Of 3,7-Diarylaminocholestanes By Titanium-Mediated Reductive Amination, Md Wasi Ahmad, Hong Seok Kim
Stereoselective Synthesis Of 3,7-Diarylaminocholestanes By Titanium-Mediated Reductive Amination, Md Wasi Ahmad, Hong Seok Kim
Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)
An efficient method for the synthesis of aryl aminocholestanes, using a chlorotriisopropoxytitanium (IV)-mediated reductive amination reaction of 5a-cholestane-3,7-dione, is reported. A series of 3, 7-diarylaminocholestane derivatives were prepared according to this methodology in up to 98% yield. These compounds were primarily characterized by 1H NMR, 13C NMR, and mass spectrometry.
Selective Fluorescence Sensing Of Salicylic Acid Using A Simple Pyrene Appended Imidazole Receptor, Md Wasi Ahmad, Bo Yeon Kim, Hong Seok Kim
Selective Fluorescence Sensing Of Salicylic Acid Using A Simple Pyrene Appended Imidazole Receptor, Md Wasi Ahmad, Bo Yeon Kim, Hong Seok Kim
Dr. Mohammad Wasi Ahmad (Md Wasi Ahmad)
A simple salicylic acid selective fluorescence receptor 1 was designed by combining 1-pyrenecarboxaldehyde and 1-(3-aminopropyl)imidazole. The selective sensing of salicylic acid resulted in a significant increase in monomer emissions due to the p–p interactions between the benzene and pyrene rings. The nature of the interactions between receptor 1 and salicylic acid was investigated further by 1H NMR spectroscopy, and the energy minimised structure of the complex between receptor 1 and salicylic acid was optimised. Receptor 1 showed the highest binding constant with 5-nitrosalicylic acid among all the aromatic carboxylic acids tested. 5-Nitrosalicylic acid formed a complex with receptor 1 at …