Sensor 1 was developed as the first example of a fluorescence‐enhanced Al3+ sensor with unique dual‐channel emissions. The addition of Al3+ to 1 elicits a large fluorescence enhancement by inhibition of a quenching Photoinduced electron‐transfer (PET) channel and also a dramatic fluorescence enhancement due to promotion of an emissive excimer channel formation. The dual‐channel fluorescence‐enhanced response of the sensor contributes to its high sensitivity and selectivity.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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Lin et al. (2008) studied this question.
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