Schwartz, Heidi A., Laurenzen, Hannah, Kerschbaumer, Samuel, Werker, Melanie, Olthof, Selina ORCID: 0000-0002-8871-1549, Kopacka, Holger, Huppertz, Hubert ORCID: 0000-0002-2098-6087, Meerholz, Klaus and Ruschewitz, Uwe ORCID: 0000-0002-6511-6894 (2020). Thiophene-phenylquinazoline probe for selective ratiometric fluorescence and visual detection of Fe(iii) and turn-off fluorescence for I- and its applications. Photochem. Photobiol. Sci., 19 (12). S. 1730 - 1741. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1474-9092

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Abstract

A 2,5-bis(4-phenylquinazolin-2-yl)thiophene (BQT) probe is designed, synthesized and explored for selective ratiometric fluorescence and visual detection of Fe3+ and as a turn-off fluorescence probe for I- anion. BQT is colorless and has blue emission in CH3CN solution. BQT selectively complexes with Fe3+, turns its solution from colorless to greenish yellow and enables the ratiometric sensing of Fe3+ with limit of detection (LOD) and limit of quantitation (LOQ) of 2 x 10(-8) M and 6.1 x 10(-8) M, respectively. Binding constant of BQT with Fe3+ is found to be 4.1 x 10(-4) M-1. BQT is also able to sense I- anion present in aqueous solution by selectively turning colorless to yellow and fluorescence quenching with a LOD of 1.7 x 10(-7) M and LOQ of 5.2 x 10(-7) M. BQT sensing ability is not influenced by the presence of other metal ions and anions in the vicinity. The BQT-Fe3+ complex is thoroughly characterized using MALDI-TOF, NMR and Job's plot. A reversibility experiment with EDTA suggests BQT is a reversible fluorescent chemosensor for Fe3+ ions. The spectroscopic data of BQT and its complexes are employed to construct a field test kit for qualitative analysis and INHIBIT logic gate.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Schwartz, Heidi A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Laurenzen, HannahUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kerschbaumer, SamuelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Werker, MelanieUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olthof, SelinaUNSPECIFIEDorcid.org/0000-0002-8871-1549UNSPECIFIED
Kopacka, HolgerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huppertz, HubertUNSPECIFIEDorcid.org/0000-0002-2098-6087UNSPECIFIED
Meerholz, KlausUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ruschewitz, UweUNSPECIFIEDorcid.org/0000-0002-6511-6894UNSPECIFIED
URN: urn:nbn:de:hbz:38-309497
DOI: 10.1039/d0pp00002g
Journal or Publication Title: Photochem. Photobiol. Sci.
Volume: 19
Number: 12
Page Range: S. 1730 - 1741
Date: 2020
Publisher: ROYAL SOC CHEMISTRY
Place of Publication: CAMBRIDGE
ISSN: 1474-9092
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
CHEMOSENSOR; FE3+; AL3+; SENSOR; CR3+; IONMultiple languages
Biochemistry & Molecular Biology; Biophysics; Chemistry, PhysicalMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/30949

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