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Graphene quantum dot‐enhanced chemiluminescence through energy and electron transfer for the sensitive detection of tyrosine
Author(s) -
Pang Chunhua,
Han Suqin,
Li Yue,
Zhang Junmei
Publication year - 2018
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800141
Subject(s) - chemistry , chemiluminescence , detection limit , electron transfer , graphene quantum dot , quantum dot , graphene , photochemistry , analytical chemistry (journal) , electron , nanotechnology , optoelectronics , chromatography , physics , materials science , quantum mechanics
Graphene quantum dots (GQD) could significantly enhance the chemiluminescence (CL) reaction of Ce(IV) with NaHSO 3 through energy and electron transfer. The chemiluminescence resonance energy transfer (CRET) occurred between SO 2 * / 1 O 2 and GQD, and radiative electron–hole annihilation came from the combining of the hole‐injected GQD (GQD •+ ) and electron‐injected GQD (GQD •– ). Tyrosine (Tyr) is easily oxidized by OH • and Ce(IV), which results in the decrease of OH • and Ce(IV), and the CL intensity of the GQD–Ce(IV)–NaHSO 3 system is inhibited by Tyr. In this way, the GQD‐based CL as a sensitive and selective method was applied for the detection of Tyr in the range 0.02–8.00 μM with the detection limit of 4.0 nM. The method was applied to the determination of Tyr in food samples with satisfactory results.