TIGER

Journal Articles: 7 results
Radical Quenching of 1,1-Diphenyl-2-picrylhydrazyl: A Spectrometric Determination of Antioxidant Behavior  John M. Berger, Roshniben J. Rana, Hira Javeed, Iqra Javeed, and Sandi L. Schulien
Describes a colorimetric assay using the persistent radical 1,1-diphenyl-2-picrylhydrazyl to measure the activity of common antioxidants. This exercise is particularly appropriate for a course geared for nutrition or food science majors.
Berger, John M.; Rana, Roshniben J.; Javeed, Hira; Javeed, Iqra; Schulien, Sandi L. J. Chem. Educ. 2008, 85, 408.
Food Science |
Free Radicals |
UV-Vis Spectroscopy |
Vitamins
Synthesis of Triarylmethane and Xanthene Dyes Using Electrophilic Aromatic Substitution Reactions  James V. McCullagh and Kelly A. Daggett
In this experiment, electrophilic aromatic substitution reactions are used to synthesize several triarylmethane and xanthene dyes (fluorescein, erythrosin B, thymolphthalein, and rhodamine B) using common equipment while avoiding often troublesome, hydroscopic Lewis acids. Subsequent UVĀvis analysis produce spectra that match commercially available dye samples.
McCullagh, James V.; Daggett, Kelly A. J. Chem. Educ. 2007, 84, 1799.
Acids / Bases |
Aromatic Compounds |
Dyes / Pigments |
Electrophilic Substitution |
Equilibrium |
Synthesis |
UV-Vis Spectroscopy
An Inexpensive Kinetic Study: The Reaction of FD&C Red #3 (Erythrosin B) with Hypochlorite  Maher M. Henary and Arlene A. Russell
Students use a desktop visible spectrophotometer to quantitatively follow the rate of disappearance of FD&C Red #3 with hypochlorite. The first-order reaction in both dye and bleach yields simple data that students can easily process and graph using spreadsheet software to obtain the rate constant and the rate law.
Henary, Maher M.; Russell, Arlene A. J. Chem. Educ. 2007, 84, 480.
Dyes / Pigments |
Kinetics |
Rate Law |
UV-Vis Spectroscopy
Comparative Methylation of 1,8-Dihydroxy-9,10-anthraquinone: Chemoselectivity in the Organic Chemistry Laboratory  Grigoriy A. Sereda
Describes a laboratory experiment that gives organic chemistry students an example of an environmentally friendly pyrolytic procedure of organic synthesis. Another synthesis with the same reactants teaches the students that appropriate reaction conditions may allow the chemist to perform an organic reaction with high chemoselectivity.
Sereda, Grigoriy A. J. Chem. Educ. 2005, 82, 1839.
Reactions |
Ethers |
Green Chemistry |
Phenols |
Synthesis |
Thin Layer Chromatography |
UV-Vis Spectroscopy
Colorful Azulene and Its Equally Colorful Derivatives  Robert S. H. Liu
Analysis of azulene and related compounds for an explanation of their respective colors.
Liu, Robert S. H. J. Chem. Educ. 2002, 79, 183.
Atomic Properties / Structure |
MO Theory |
UV-Vis Spectroscopy |
Aromatic Compounds |
Alkenes
Isolation and Spectral Analysis of Naturally Occurring Thiarubrine A  Juan Reyes, Melita Morton, Kelsey Downum, and Kevin E. O'Shea
An experiment in which students isolate (from ragweed) and characterize thiarubrine A; thiarubrines are an important class of compounds which have recently received attention because of their unusual reactivity, unique biological activity, and potential medicinal applications.
Reyes, Juan; Morton, Melita; Downum, Kelsey; O'Shea, Kevin E. J. Chem. Educ. 2001, 78, 781.
Aromatic Compounds |
IR Spectroscopy |
Natural Products |
NMR Spectroscopy |
UV-Vis Spectroscopy |
Medicinal Chemistry
Spectroscopic Instruction in Introductory Organic Chemistry: Results of a National Survey  Christopher W. Alexander, Gary L. Asleson, Marion T. Doig, and Frederick J. Heldrich*
The survey results indicated that the spectroscopic techniques of IR, MS, proton NMR, and carbon NMR are core techniques in most courses. A considerable amount of the instruction in spectroscopy is occurring in both the laboratory and the lecture portions of the course.
Alexander, Christopher W.; Asleson, Gary L.; Doig, Marion T.; Heldrich, Frederick J. J. Chem. Educ. 1999, 76, 1294.
IR Spectroscopy |
Mass Spectrometry |
NMR Spectroscopy |
UV-Vis Spectroscopy |
Spectroscopy