STUDY OF ZINE(II) DIPYRIN COMPLEX AS A COLORIMETRIC SENSOR FOR CYANIDE IONS
The cyanide ion (CN-) is a higly toxic molecule because it can disrupt cellular respiration processes. Cyanide exposure generally comes from natural sources as well as industrial activities. Therefore, a sensitive and selective detection method for the CN- ion is needed. The colorimetric approach ha...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/81358 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The cyanide ion (CN-) is a higly toxic molecule because it can disrupt cellular respiration processes. Cyanide exposure generally comes from natural sources as well as industrial activities. Therefore, a sensitive and selective detection method for the CN- ion is needed. The colorimetric approach has the advantage of rapid and easy analysis due to color changes when the target ion is present. One group of compounds that has potential as colorimetric sensors is dipyrrin and its complexes. In previously reported research, phenolic-dipyrrin can be applied can be applied as a sensor for Zn(II) ions. Phenolic-dipyrrin can form a pink hemiquinone species that, when complexed with Zn(II) ions, results ini an orange color. The CN- ion is a strong ligand that can form coordination with the Zn(II) ions, so when the cN- ion interacts with the Zn(II) phenolic-dipyrrin complex, it is hypothesized to release hemiquinone species. Therefore, this study aims to investigate the Zn(II) dipyrrin complex as a colorimetric sensor material for the CN- ion, focusing on the Zn(II) vanillin-dipyrrin and Zn(II) 5-allylvanillin dipyrrin complexes. lhls research was conducted in three stages: synthesis of 5-allylvanillin, synthesis and complexation of dipyrrin with Zn(II) ions, and testing the interaction between the Zn(II) dipyrrin complex and ions using UV-Vis colorimetry. The synthesis of vanillin dipyrrin and 5-allylvanillin-dipyrrin from their reduced forms resultes in yields of 76% and 89%, respectively. Testing the interaction of the Zn(II) dipyrrin complex showed a color change from orange to pink upon the addition of CN- ions, with detection limits for the Zn(II) vanillin-dipyrrin and Zn(II) 5-allylvanillin-dipyrrin complexes being 0.19 and 0.48 ppm, respectively. Further testing with c1- and Y- ions did not show significant color changes, indicating the selectivity of the Zn(II) dipyrrin complex. Therefore, the Zn(II) dipyrrin complex has potential as a colorimteric sensor for the cN- ion. |
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