Colorimetric Sensing of Zinc Ions Based of Dipyrrin Derivate
Ayu Tri Khodizah (a), Mohammad Akbar Ferryansyah (a), Lia Dewi Juliawaaty (a), Didin Mujahidin (a), Brian Yuliarto (b),(c), Anas Santria (d),(e), Dikhi Firmansyah(a*)

(a)Organic Chemistry Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia.
*dikhfi[at]itb.ac.id
(b)Advanced Functional Materials (AFM) Laboratory, Engineering Physics, Institut Teknologi Bandung, 40132, Bandung, Indonesia.
(c)Research Center for Nanosciences and Nanotechnology (RCNN), Institut Teknologi
Bandung, 40132, Bandung, Indonesia
(d)Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
(e)Research Center for Chemistry, National Research and Innovation Agency, Kawasan Puspitek, Serpong, Tangerang Selatan, Banten, Indonesia

Abstract

Vanillin&#8210-dipyrrin was described as a colorimetric chemosensor for zinc ions based on the formation of complexes. The interaction between vanillin-dipyrrin ligand and zinc ions resulting in the formation of the zinc-vanillin&#8210-dipyrrin complex compound with a ratio of 1:2. This complex showed high linearity of 0.98 (at 0-0.5 zinc ions eq.) and 0.99 (at 0.5-1 zinc ions eq.) indicating a good quantitative measurements potential. The UV-Vis spectroscopic studies demonstrated that the addition of zinc ions to vanillin-dipyrrin in methanol resulted in a change in the UV-Vis spectra from the initial absorption maxima of 428 and 552 nm to 480 nm, accompanied by a color change from pink to orange.

Keywords: vanillin-dipyrrin- zinc ions- UV-Vis studies- colorimetric

Topic: CHEMISTRY AND MATERIAL SCIENCES