Journal
JOURNAL OF FOOD SCIENCE EDUCATION
Volume 20, Issue 1, Pages 26-30Publisher
WILEY
DOI: 10.1111/1541-4329.12214
Keywords
additives; color; gelatin; IYPT2019; photochemistry
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This work connects the subjects of periodic table and photochemistry by making periodic tables out of fluorescent jellies, allowing undergraduate students to discuss concepts of photophysics and photochemistry, as well as 3D-printing process and gelification, without the need for expensive reagents or equipment.
It began in 1869, and today we have 118 elements listed in the Periodic table, thanks to Mendeleev's work. Carbon, hydrogen, oxygen, and nitrogen are elements presented in many organic compounds. Some of them can exhibit photophysical and photochemical properties. Herein, we proposed an easy to make an experiment in chemistry classes to connect both subjects, periodic table and photochemistry, through periodic tables made of fluorescent jellies. A sheet of PET-G was heated and put over the periodic table mold made in a 3D-printing to produce the form used in this work. Quinine and vitamin B2, from tonic water and vitamin supplement, respectively, were the fluorescent compounds selected to be in the gelification process to give the jelly fluorescence. The light source was a black light lamp. This work allowed for the discussion of photophysics and photochemistry concepts, 3D-printing process, gelification, and the International Year of the Periodic Table of Chemical Elements-IYPT2019-with undergraduate students without the use of expensive reagents or equipment.
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