Version 2 2024-02-01, 21:46Version 2 2024-02-01, 21:46
Version 1 2024-01-23, 09:03Version 1 2024-01-23, 09:03
journal contribution
posted on 2024-02-01, 21:46authored byWenfei Ren, Jiguang Li, Baiyi Zu, Da Lei, Xincun Dou
The exploration of
emerging functionalized quantum dots (QDs) through
modulating the effective interaction between the sensing element and
target analyte is of great significance for high-performance trace
sensing. Here, the chromone-based ligand grafted QDs (QDs-Chromone)
were initiated to realize the electronic energy transfer (EET) driven
specifically by ethylenediamine (EDA) in the absence of spectral overlap.
The fluorescent and colorimetric dual-mode responses (from red to
blue and from colorless to yellow, respectively) resulting from the
expanded conjugated ligands reinforced the analytical selectivity,
endowing an ultrasensitive and specific response to submicromolar-liquid
of EDA. In addition, a QDs-Chromone-based sensing chip was constructed
to achieve the ultrasensitive recognition of EDA vapor with a naked-eye
observed response at a concentration as low as 10 ppm, as well as
a robust anti-interfering ability in complicated scenarios monitoring.
We expect the proposed EET strategy in shaping functionalized QDs
for high-performance sensing will shine light on both rational probe
design methodology and deep sensing mechanism exploration.