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Beni B. Dangi; Maggie A. Cooper; Nathaniel Carnegie; Judy Clark – Journal of Chemical Education, 2025
A laboratory experiment has been designed for teaching laboratories aimed at training students in the basics of spectroscopy in junior and senior level undergraduate chemistry courses. Despite the ubiquity of light-based tools in modern science, students often find it difficult to comprehend light and light-matter interactions. A portable…
Descriptors: Undergraduate Students, Chemistry, Science Instruction, Spectroscopy
Volpe, Kate; Podlesny, Erin E. – Journal of Chemical Education, 2020
A continuous flow photopinacol coupling of benzophenone has been developed and implemented in the undergraduate laboratory. This photoreduction was accomplished using 2-propanol as an H atom donor and cosolvent in the reaction. The simple and inexpensive UV light source and flow reactor design (less than $350/photochemical flow system) provide an…
Descriptors: College Science, Science Instruction, Undergraduate Study, Science Laboratories
Bullis, Ryan; Coker, Joseph; Belding, Jacob; De Groodt, Adam; Mitchell, Dylan W.; Velazquez, Nancy; Bell, Ashtyn; Hall, Jaycee; Gunderson, William A.; Gunderson, Julie E. C. – Journal of Chemical Education, 2021
A fluorometer is a device that measures the spectroscopic properties of fluorescent materials, and fluorometry is used widely in chemistry research settings to characterize fluorescent samples. One of the obstacles faced by undergraduate programs looking to implement fluorometer-based experiments into their laboratory curriculum is the high cost…
Descriptors: Chemistry, Measurement Equipment, Laboratory Equipment, Spectroscopy
Changenet, Pascale; Gustavsson, Thomas; Lampre, Isabelle – Journal of Chemical Education, 2020
In order to introduce students to the fascinating field of femtochemistry, we propose here a practical laboratory training course conceived for second-year master's students in chemistry. We describe the use of a broadband femtosecond transient absorption (pump-probe) experiment for monitoring a fast light-triggered chemical reaction in solution.…
Descriptors: Chemistry, Science Instruction, Spectroscopy, Scientific Concepts
Savakinas, Mallory V.; Frey, Olivia M.; Piro, Nicholas A.; Rhile, Ian J.; Hamann, Christian S. – Journal of Chemical Education, 2021
Friedel-Crafts alkylation reactions using a curated set of alcohols provide students with the opportunity to combine the study of electrophilic aromatic substitution with carbocation rearrangements. In this experiment students may be presented with up to nine alcohols that yield six products, all synthesized under identical reaction conditions.…
Descriptors: Science Instruction, Spectroscopy, Science Experiments, Teaching Methods
da Silva, Rodrigo Sens; Borges, Endler Marcel – Journal of Chemical Education, 2019
Here, students determine aspirin (acetylsalicylic acid) mass in pharmaceutical tablets using a colorimetric method. Aspirin, salicylate, and salicylic acid do not absorb visible light. Thus, in alkaline medium, acetylsalicylic acid was hydrolyzed to salicylate; then, it was reacted with an acidic Fe(III) solution, and a violet complex was formed.…
Descriptors: Spreadsheets, Drug Therapy, Light, Chemistry
Yimkosol, Warangkana; Dangkulwanich, Manchuta – Journal of Chemical Education, 2021
Colorful transitions of various acid-base indicators have been used to illustrate the concept of chemical equilibria, especially in spectrophotometric determination of the equilibrium constants or pKa values. To accommodate an online laboratory environment necessitated by the COVID-19 pandemic, this work employs color analyses from digital images…
Descriptors: Chemistry, Science Instruction, Teaching Methods, Laboratory Experiments
Bauer, Christina A.; Hamada, Terianne Y.; Kim, Hyesoo; Johnson, Mathew R.; Voegtle, Matthew J.; Emrick, Matthew S. – Journal of Chemical Education, 2018
Quantum dots (QDs) are useful for demonstrating the particle-in-a-box (PIB) model utilized in quantum chemistry, and can readily be applied to a discussion of both thermodynamics and kinetics in an undergraduate laboratory setting. Modifications of existing synthetic procedures were used to create QDs of different sizes and compositions (CdS…
Descriptors: Science Instruction, College Science, Undergraduate Study, Chemistry
Herrera-González, Ana M.; Caldera-Villalobos, Martín; Pérez-Mondragón, Alma A.; Cuevas-Suárez, Carlos E.; González-López, J. Abraham – Journal of Chemical Education, 2019
An experiment for the calculation of the degree of double bond conversion, after a polymerization reaction, of photopolymerizable liquid monomers using FTIR-ATR spectroscopy is reported. The experiment was successfully conducted with undergraduate students in materials engineering during the Fundamentals of Polymeric Material course. Students…
Descriptors: Spectroscopy, Chemistry, Science Instruction, Undergraduate Students
Özdemir, Erdogan; Coramik, Mustafa; Ürek, Handan – Physics Education, 2019
Optics is one of the subject areas in which students have difficulty learning. Establishing the right connections between the concepts of optics and daily life supports the learning of the concepts of optics. In addition, this connection increases the students' motivation to learn optical issues. In this study, three activities related to prisms…
Descriptors: Optics, Scientific Concepts, Physics, Light
Quin~ones, Rosalynn; Moreno, Sara; Shoup, Deben; Klein, Mieke; Westfall, Tamara D.; Damai, Aakriti – Journal of Chemical Education, 2021
With the advancements in broad-spectrum sunscreens and the recent bans on benzene-based sunscreens due to their environmental toxicity, there has been a push toward broad-spectrum sunscreens containing in organic active ingredients. In this study, a procedure was developed to analyze the particle size and size distribution of inorganic active…
Descriptors: Radiation, Safety, Hazardous Materials, Chemistry
Zhao, Yanlu; Lim, Minyoung; Choi, Sungmoon; Yu, Junhua – Journal of Biological Education, 2022
The attractive photophysical properties of luminescent nanoparticles have prompted numerous studies on their synthesis and biological applications. Due to the complexity of components, sizes, morphologies, and strong light scattering of the nanoparticles the absorption spectrum alone is not enough for characterising and analysing the real…
Descriptors: Spectroscopy, Cytology, Light, Science Instruction
Onorato, Pasquale; Gratton, Luigi; Malgieri, Massimiliano; Oss, Stefano – Physics Education, 2017
The lifetimes of the photoluminescent compounds contained in the coating of fluorescent compact lamps are usually measured using specialised instruments, including pulsed lasers and/or spectrofluorometers. Here we discuss how some low cost apparatuses, based on the use of either sensors for the educational lab or commercial digital photo cameras,…
Descriptors: Science Instruction, Light, Physics, Science Experiments
Koenig, Emma; Jacobs, Ari; Lisensky, George – Journal of Chemical Education, 2017
Semiconductors are an important class of materials; preparing ZnO nanorods allows semiconducting properties to be easily observed. The week before lab, groups of four students take 15 min to setup two fluorine-doped tin oxide glass (FTO) slides in a zinc nitrate and hexamethylenetetramine solution stored at 90°C until the next lab. Hexagonal ZnO…
Descriptors: Science Instruction, College Science, Undergraduate Study, Inorganic Chemistry
Dangkulwanich, Manchuta; Kongnithigarn, Kaness; Aurnoppakhun, Nattapat – Journal of Chemical Education, 2018
Routinely used in quantitative determination of various analytes, UV-vis spectroscopy is commonly taught in undergraduate chemistry laboratory courses. Because the technique measures the absorbance of light through the samples, losses from reflection and scattering by large molecules interfere with the measurement. To emphasize the importance of…
Descriptors: Telecommunications, Handheld Devices, Educational Technology, Technology Uses in Education