A Reversible Rhodamine B Based pH Probe with Large Pseudo-Stokes Shift

Bao, G; Wong, KL; Tanner, PA

A Reversible Rhodamine B Based pH Probe with Large Pseudo-Stokes Shift

Bao, G

Wong, KL Tanner, PA

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Publication Type:: Journal Article
Citation:: ChemPlusChem, 2019, 84 (7), pp. 816 - 820
Issue Date:: 2019-07-01

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Field	Value	Language
dc.contributor.author	Bao, G https://orcid.org/0000-0001-5103-5009	en_US
dc.contributor.author	Wong, KL	en_US
dc.contributor.author	Tanner, PA	en_US
dc.date.issued	2019-07-01	en_US
dc.identifier.citation	ChemPlusChem, 2019, 84 (7), pp. 816 - 820	en_US
dc.identifier.uri	http://hdl.handle.net/10453/136226
dc.description.abstract	© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A reversible and sensitive pH probe DPE−Rh operates by Förster resonance energy transfer from 1,2-diphenylethyne (DPE) to Rhodamine B (Rh). In the presence of H+, the spirolactam ring of the Rhodamine B unit was opened and this resulted in ca. 1000-fold enhancement of fluorescence intensity with linear change over the pH range of 2.0 to 5.5. The Förster resonance energy transfer offered this probe an effective excitation–emission wavelength shift of around 240 nm with about 100 % quenching of the donor emission. The response of the sensor is tolerant towards a wide range of metal ions and the sensing mechanism was deduced by 1H NMR spectrometry. This FRET-based molecule not only provides a sensitive pH probe, but also suggests an effective strategy to eliminate the interference of excitation light.	en_US
dc.relation.ispartof	ChemPlusChem	en_US
dc.relation.isbasedon	10.1002/cplu.201900263	en_US
dc.subject.classification	General Chemistry	en_US
dc.title	A Reversible Rhodamine B Based pH Probe with Large Pseudo-Stokes Shift	en_US
dc.type	Journal Article
utslib.citation.volume	7	en_US
utslib.citation.volume	84	en_US
utslib.for	0301 Analytical Chemistry	en_US
utslib.for	03 Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.issue	7	en_US
pubs.publication-status	Published	en_US
pubs.volume	84	en_US

Abstract:

© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A reversible and sensitive pH probe DPE−Rh operates by Förster resonance energy transfer from 1,2-diphenylethyne (DPE) to Rhodamine B (Rh). In the presence of H+, the spirolactam ring of the Rhodamine B unit was opened and this resulted in ca. 1000-fold enhancement of fluorescence intensity with linear change over the pH range of 2.0 to 5.5. The Förster resonance energy transfer offered this probe an effective excitation–emission wavelength shift of around 240 nm with about 100 % quenching of the donor emission. The response of the sensor is tolerant towards a wide range of metal ions and the sensing mechanism was deduced by 1H NMR spectrometry. This FRET-based molecule not only provides a sensitive pH probe, but also suggests an effective strategy to eliminate the interference of excitation light.

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http://hdl.handle.net/10453/136226