DIPYRRIN DERIVATES AS AN IMPORTANT ION COLORIMETRIC SENSOR AND FOR HIGH SCHOOL EXPERIMENT MODULE MATERIALS

• Main Author: Tri Khodizah, Ayu
• Format: Theses
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/71520
• Institution: Institut Teknologi Bandung

Ions play a vital role in many chemical and biological processes. Various ions have different roles. Some important ions are Zn2+ (zinc ion), F- (fluoride ion), and CN- (cyanide ion). Zinc ions play important roles in the body's metabolism. If the body lacks zinc, it will cause several metabolic disorders. The application of fluoride, especially in toothpaste, has a negative impact when used in excessive concentrations, and cyanide ions can cause death. Due to the negative impact of these important ions, it is necessary to have ion detectors that are selective, fast at detecting color changes, portable, and economical. Several synthetic organic compounds have been developed and have great potential as ion detectors. These compounds are also known as chemosensors of organic compounds with a colorimetric design. Dipyrrin derivatives are one of the chemosensors that have been reported as potential selective sensors for certain ions, but meso-phenyl dipyrrin is still limited in its application as a detector of important ions. Therefore, this study aimed to synthesize and test the interaction between two dipyrrin derivatives and zinc, fluoride, and cyanide ions, as well as develop a colorimetric experiment e-module for high school students. Two dipyrrin derivatives, namely vanillin-dipyrrin and 4-hydroxybenzaldehyde-dipyrrin, have been successfully synthesized. The results of interaction testing of vanillin-dipyrrin derivatives with zinc showed bathochromic and hypsochromic effects, accompanied by a change in the color of the test solution from pink to orange. Meanwhile, the interaction between vanillin-dipyrrin and 4-hydroxybenzaldehyde-dipyrrin with fluoride ions only showed a decrease in the absorbance value. Furthermore, the interaction of vanillin-dipyrrin derivatives with cyanide ions showed an increase and decrease in absorbance but did not show a shift in wavelength. The results of this study indicate that vanilin-dipyrrin has the potential to be a colorimetric zinc ion detector.