SupraBank - p-Sulfonatocalix[8]arene and vitamin C complexation: assessment of photophysical, pKa and antioxidant property

DOI:: https://doi.org/10.34804/supra.20210928252
Title:: p-Sulfonatocalix[8]arene and vitamin C complexation: assessment of photophysical, pKa and antioxidant property

Description:: Abstract Mode of inclusion complexation of p-sulfonatocalix[8]arene and ascorbic acid in aqueous solution has been investigated in acidic pH based by UV–visible, fluorescence, FT-IR, 1H-NMR and HR-MS spectroscopic studies. Addition of ascorbic acid solution to p-sulfonatocalix[8]arene enhances the fluorescence intensity of p-Sulfonatocalix[8]arene with blue shift in absorption spectra. Hypsochromic shift in absorbance maxima and hyperchromic shift in emission maxima indicates that ascorbic acid experiences less polar microenvironment when bind with SCX8. Binding site and stoichiometry are examined by 1H-NMR and HR-MS techniques. Binding constant (K = 0.42 × 102 M−1) for the inclusion complex is calculated. For complexation, forces like electrostatic attraction, hydrogen bonding and hydrophobic environment of p-sulfonatocalix[8]arene cavity play important role. p-sulfonatocalix[8]arene shows upward pKa shift after binding with Ascorbic acid. The antioxidant property of ascorbic acid has been investigated which shows enhancement by 57% upon complexation with p-sulfonatocalix[8]arene. Graphical Abstract

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Citation:	V. S. Kalyani, D. D. Malkhede, SupraBank 2024, p-Sulfonatocalix[8]arene and vitamin C complexation: assessment of photophysical, pKa and antioxidant property (dataset). https://doi.org/10.34804/supra.20210928252
Link:	https://doi.org/10.34804/supra.20210928252
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Citation:	V. S. Kalyani, D. D. Malkhede, J Incl Phenom Macrocycl Chem 2017, 87, 179–189.
Link:	https://doi.org/10.1007/s10847-016-0689-x
Export:	BibTex \| RIS \| EndNote \|