Study on Complex Formation of Fluorescein-p-Sulfonatocalix[4]arene by Spectroscopic Methods

Sharadchandra Gawhale¹, Yogita Thakare², Dipalee Malkhede^3*, Gajanan Chaudhari^2*

¹Department of Applied Chemistry, AISSMS-COE, Pune, India.
²Department of Chemistry, Shri.Shivaji Science College, Amravati, India.
³Department of Chemistry, University of Pune, Pune, India.

DOI: 10.4236/opj.2014.49024                

Abstract

The aqueous solution of p-Sulfonatocalix[4]arene-fluorescein complex has been studied based on fluorescence and 1H NMR spectroscopic results. It has been found that the fluorescence intensity quenches regularly upon addition of p-SCX4. The proposed interaction mechanism between p-SCX4 and FL indicates that FL partially goes into the cavity of p-SCX4 with the help of strong electrostatic and π-π* interaction. The quenching constants and stability constants are determined by p-SCX4-FL systems. The proposed inclusion complex is discussed on 1H NMR results. Results are consistent with experimental data obtained from NMR spectroscopy.

Keywords

p-Sulfonatocalix[4]arene, Fluorescein, Electrostatic Interactions, Hydrophobic Interaction, 1H NMR Analysis

Conflicts of Interest

The authors declare no conflicts of interest.

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