Development and Evaluation of the H NMR MoleculAR Application
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Lyniesha Wright [1] ; Maria Oliver-Hoyo [1]
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[1] North Carolina State University
North Carolina State University
Township of Raleigh, Estados Unidos
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- Localización: Journal of chemical education, ISSN 0021-9584, Vol. 98, Nº 2, 2021, págs. 478-488
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
An augmented reality (AR) application and an activity worksheet have been developed to support students in visualizing the concepts involved when solving 1H NMR problems. This instructional resource was designed to encourage conceptual problem-solving and prevent memorization by eliminating the use of chemical shift tables. It uses the compare–predict–observe–explain (CPOE) cycle and contrasting cases to guide students to abstract principles about how proton equivalency, nuclear spin, electronegativity, and anisotropy impact the number, intensity, splitting, and shift of signals on a spectrum. The AR resource aids students in visualizing 3D structures, molecular orbitals, and electrostatic potential maps. Results from the user experience questionnaire revealed that students had a positive user experience and ranked the novelty of the application as its best feature. We also provide evidence using the Behavioral Observation of Students in Schools protocol that merits the use of this instructional resource in the laboratory setting on the basis of the minimal need for instructor’s assistance that was observed. This paper describes how the application H NMR MoleculAR, now freely available in Android and iOS stores, was incorporated as an in-lab app for the 1H NMR laboratory at our institution. It has also been administered remotely and has been proven to be a useful complement to organic chemistry instruction.
