Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.

Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.

Bibliographic Details
Main Author: Farshbaf, Sepideh
Language:English
Published: Bowling Green State University / OhioLINK 2021
Subjects:
Chemistry
Photochemistry
Photophysics
Fluorescent sensor
Supramolecular sensing
Phosphates
Arsenate
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626352646326308
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu16263526463263082021-09-02T05:10:44Z Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes. Farshbaf, Sepideh Chemistry Photochemistry Photophysics Fluorescent sensor Supramolecular sensing Phosphates Arsenate <p>Analytical chemistry together with photophysical studies is a powerful tool for the detection and quantification of crucial chemical species involved in the environment and biological processes. Among analytical techniques, luminescent chemosensors are widely used in the development of new solutions to long-standing problems. Here, the main focus of this research is the recognition and quantification of important biological and organic/inorganic anions utilizing luminescent molecular sensors.</p><p> The first part of this work is focused on the recognition of ATP due to its pivotal role in many biological processes. Bisantrene, a molecule comprising imidazolium hydrazone receptor moieties and anthracene as a central fluorophore, was employed as a new sensor for ATP in water at neutral pH by displaying amplified fluorescence. This process was selective to ATP while other nucleotide phosphates such as AMP, GTP, UTP, and CTP did not elicit sensor response. Also, this sensor was used to sense other small anions such as F<sup>-</sup>, Cl<sup>-</sup>, AcO<sup>-</sup>, H<sub>2</sub>PO<sub>4</sub><sup>-</sup> and HP<sub>2</sub>O<sub>7</sub><sup>3-</sup> in an organic solvent, where the sensor shows fluorescence quenching.</p> <p> The second project is focused on the recognition and sensing of various phosphates and carboxylates in water using a metal-sensor coordination system. The sensors are based on fluorescent carboxamidequinoline chemosensors derivatized by phenol and benzothiazole. These sensors form non-fluorescent complexes with Eu<sup>3+</sup> where the fluorescence is recovered when the phosphate anion sequesters the Eu<sup>3+</sup> from the complex. The present sensors show selectivity for biological phosphates such as ATP, ADP, and AMP.</p> </p>Arsenate (HAsO<sub>4</sub><sup>2-</sup>) is a highly toxic analyte to living organisms, and efforts toward sensing arsenate are an important area of research. The third project is aimed at the detection of arsenate (HAsO<sub>4</sub><sup>2-</sup>) in water by luminescence spectroscopy using a lanthanide/transition metal dyad. We have synthesized a cryptand molecule which binds Eu<sup>3+</sup>and displays a ligand-sensitized luminescence. This intense luminescence is quenched upon addition of Zn<sup>2+</sup>, only to be restored in the presence of arsenate. This lanthanide/transition metal dyad was used for the detection of arsenate in water utilizing an Off-to-On intensity switching of Eu<sup>3+</sup> luminescence.</p> 2021-09-01 English text Bowling Green State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626352646326308 http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626352646326308 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Chemistry
Photochemistry
Photophysics
Fluorescent sensor
Supramolecular sensing
Phosphates
Arsenate
spellingShingle Chemistry
Photochemistry
Photophysics
Fluorescent sensor
Supramolecular sensing
Phosphates
Arsenate
Farshbaf, Sepideh
Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
author Farshbaf, Sepideh
author_facet Farshbaf, Sepideh
author_sort Farshbaf, Sepideh
title Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
title_short Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
title_full Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
title_fullStr Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
title_full_unstemmed Photophysical Studies of Luminescent Supra-Molecules and Their Application in Sensing of Anionic Analytes.
title_sort photophysical studies of luminescent supra-molecules and their application in sensing of anionic analytes.
publisher Bowling Green State University / OhioLINK
publishDate 2021
url http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626352646326308
work_keys_str_mv AT farshbafsepideh photophysicalstudiesofluminescentsupramoleculesandtheirapplicationinsensingofanionicanalytes
_version_ 1719474080927711232

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