Highly photostable near-infrared fluorescent pH indicators and sensors based on BF2-chelated tetraarylazadipyrromethene dyes

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dc.contributor.author Jokic, T
dc.contributor.author Borisov, SM
dc.contributor.author Saf, R
dc.contributor.author Nielsen, DA
dc.contributor.author Kühl, M
dc.contributor.author Klimant, I
dc.date.accessioned 2012-10-12T03:33:00Z
dc.date.issued 2012-08-07
dc.identifier.citation Analytical Chemistry, 2012, 84 (15), pp. 6723 - 6730
dc.identifier.issn 0003-2700
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/17995
dc.description.abstract In this study, a series of new BF2-chelated tetraarylazadipyrromethane dyes are synthesized and are shown to be suitable for the preparation of on/off photoinduced electron transfer modulated fluorescent sensors. The new indicators are noncovalently entrapped in polyurethane hydrogel D4 and feature absorption maxima in the range 660-710 nm and fluorescence emission maxima at 680-740 nm. Indicators have high molar absorption coefficients of ∼80-000 M-1 cm-1, good quantum yields (up to 20%), excellent photostability and low cross-sensitivity to the ionic strength. pKa values of indicators are determined from absorbance and fluorescence measurements and range from 7 to 11, depending on the substitution pattern of electron-donating and -withdrawing functionalities. Therefore, the new indicators are suitable for exploitation and adaptation in a diverse range of analytical applications. Apparent pKa values in sensor films derived from fluorescence data show 0.5-1 pH units lower values in comparison with those derived from the absorption data due to Förster resonance energy transfer from protonated to deprotonated form. A dual-lifetime referenced sensor is prepared, and application for monitoring of pH in corals is demonstrated. © 2012 American Chemical Society.
dc.language eng
dc.relation.isbasedon 10.1021/ac3011796
dc.title Highly photostable near-infrared fluorescent pH indicators and sensors based on BF2-chelated tetraarylazadipyrromethene dyes
dc.type Journal Article
dc.description.version Published
dc.parent Analytical Chemistry
dc.journal.volume 15
dc.journal.volume 84
dc.journal.number en_US
dc.publocation Ohio, USA en_US
dc.identifier.startpage 6723 en_US
dc.identifier.endpage 6730 en_US
dc.cauo.name SCI.Plant Functional Biology & Climate Change en_US
dc.conference Verified OK en_US
dc.for 0904 Chemical Engineering
dc.for 0399 Other Chemical Sciences
dc.for 0301 Analytical Chemistry
dc.personcode 107129
dc.personcode 112277
dc.percentage 34 en_US
dc.classification.name Analytical Chemistry en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true
utslib.collection.history Closed (ID: 3)
utslib.collection.history Uncategorised (ID: 363)

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