Oxacalix[4]arene Based “Turn-off Florescence Sensor” for Selective and Sensitive Screening of 4-Nitrotoluene: Insight from Spectrophotometry and Spectrofluorometry

Mansi Panchal; Keyur Bhatt

doi:10.17485/IJST/v16i36.772

Article

Oxacalix[4]arene Based “Turn-off Florescence Sensor” for Selective and Sensitive Screening of 4-Nitrotoluene: Insight from Spectrophotometry and Spectrofluorometry

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v16i36.772

Year: 2023, Volume: 16, Issue: 36, Pages: 2965-2972

Original Article

Oxacalix[4]arene Based “Turn-off Florescence Sensor” for Selective and Sensitive Screening of 4-Nitrotoluene: Insight from Spectrophotometry and Spectrofluorometry

Mansi Panchal¹, Keyur Bhatt^1*

¹Department of Chemistry, Mehsana Urban Institute of Sciences, Ganpat University, Mehsana, 384001, Gujarat, India

*Corresponding Author
Email: [email protected]

Received Date:11 April 2023, Accepted Date:17 August 2023, Published Date:27 September 2023

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objective: A chemosensor of novel and highly promising nature, namely 5,17-di(2-naphthoylsulphonyl)tetranitrooxacalix[4]arene (DNSTNOC), has been synthesized. This innovative compound exhibits exceptional potential in the domain of molecular screening, particularly in the realm of selective detection of 4-nitrotoluene (4-NT) in comparison to a variety of other explosive compounds. Methods: The receptor that was synthesized underwent characterization through the utilization of H1 NMR, ESI-MS, and IR spectroscopy. In order to detect explosives, spectroscopic and spectrofluorometric techniques were employed. Findings: A novel chemosensor has been successfully synthesized and investigated for its efficacy in detecting 4-nitrotoluene (4-NT) in the presence of various explosives. In order to monitor the host-guest complexation, absorption and emission studies were conducted with different explosives. The electron-withdrawing nitro group of 4-NT readily interacts with the highly conjugated naphthoyl sulphonyl ring, resulting in a significant quenching of the fluorescence intensity of DNSTNOC through photo induced electron transfer (PET). Novelty: The aforementioned innovative chemosensor, namely 5,17-di(2-naphthoylsulphonyl)tetranitrooxacalix[4]arene (DNSTNOC), presents a pragmatic resolution for real-life predicaments, such as the identification of explosive materials. Its exceptional capability to detect 4-nitrotoluene (4-NT) within a linear concentration range of 50 mM to 1 mM is noteworthy.

Keywords: Oxacalix[4]arene; Turnoff fluorescent sensor; 4nitrotoluene; Quenching; Explosives

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Copyright

© 2023 Panchal & Bhatt. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)