A Novel 5-Bromoindolehydrazone Anchored Diiodo Salicylaldehyde Derivative as A Multifunctional Probe for Selective and Sensitive Detection of Tryptamine and F^‒ Ions Volume 5 - Issue 3

Krishnaveni Karuppiah, Murugesan Sepperumal and Siva Ayyanar*

• Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, India

Received:June 5, 2021   Published:July 07, 2021

*Corresponding author:Siva Ayyanar, Supramolecular and Organometallic Chemistry Laboratory, Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, India

DOI: 10.32474/AOICS.2021.05.000213

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Abstract

A new indole based chemosensor, 2-((5-bromo-1H-indol-2-yl) methylene) hydrazono) methyl)-4, 6-diiodophenol (BHDL) has been developed for the selective and sensitive detection of biogenic tryptamine and F^‒ ions. The binding affinity of probe BHDL towards F^‒/tryptamine (TryptA) has been investigated by UV-visible/fluorescence spectroscopy. In the presence of TryptA, probe exhibits strong enhancement in an emission band at 433 nm and the band at 555 nm underwent a blue shift accompanied by a decrease in intensity by the inhibition of Excited State Intramolecular Proton Transfer (ESIPT) functioned on BHDL. Interestingly, complexation with F^‒ ions as well triggers an enhancement in a fluorescence band at 430 nm with the concomitant disappearance of the emission band at 555 nm due to the inhibition of ESIPT and deprotonation process initiated by the hydrogen bonding complex formation. Further, Density Functional Theoretical (DFT) calculations have been performed to support the mechanism functioned on the probe BHDL in the presence of TryptA/F^‒.

Keywords:Chemosensor; BHDL; ESIPT; Tryptamine; Fluoride ion

Abstract| Introduction| Microbial Bio-Pesticides| Results and Discussion| Conclusion| Acknowledgments| References|