Journal
RSC ADVANCES
Volume 4, Issue 103, Pages 59078-59082Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra10511g
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Funding
- Australian Research Council under a Future Fellowship Scheme [FT110100152]
- RMIT Microscopy and Microanalysis Facility (RMMF)
- DAE-BRNS, Mumbai [37(2)/14/08/2014-BRNS]
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A pyridyl functionalised tetraphenylethylene (Py-TPE) for ratiometric fluorescent detection of intracellular pH values is reported. The Py-TPE fluorescent probe can be used for H+ sensing in organic solvents (CHCl3, DMF and MeOH) and the change in optical density through absorption, emission and naked eye detection was modulated. On addition of TFA, an aggregation-induced enhancement of emission with an increase in quantum yield of 0.11 to 0.63, due to an intramolecular charge transfer (ICT) process was observed. This process is reversed by addition of TEA resulting in a cycle that can be repeated several times.
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