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Dopamine integrated B, N, S doped CQD nanoprobe for rapid and selective detection of fluoride ion
Sasmita Mohapatra1, Rahul Kumar Das1
1Department of Chemistry, National Institute of Technology, Rourkela, Odisha, 769008, India.
Abstract:
A simple fluorescence turn on sensor for the detection of fluoride ion in totally aqueous medium has been developed by integrating boronic acid functionalized carbon quantum dot (BNSCQD) and dopamine. The intense emission of BNSCQD is quenched due to photoelectron transfer (PET) from BNSCQD to dopamine. A remarkable enhancement of emission intensity in presence of F- is achieved due to high reactivity of F- towards boron centre of the BNSCQD-dopamine complex and hence restricting PET between BNSCQD and dopamine. The LOD of our sensor is 0.7 pM. The sensor is not cytotoxic and could be utilised to trace fluoride level changes in human serum as well as in living cells.
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