Abstract
The detection of cadmium in the environment is very important and in this work the development of an optical fiber chemical sensor for the detection of Cd2+ is described. To achieve this, an optical fiber-based technique has been developed using a sensing layer containing a coumarin fluorophore and dipicolylamine receptor. This was covalently attached to the distal end of an optical fiber and exhibited a significant increase in fluorescence intensity in response to Cd2+ in the μM concentration range via a photoinduced electron transfer (PET) mechanism. Selectivity for Cd2+ over other metal ions has also been demonstrated showing the value of the approach for environmental measurements.
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