1 research outputs found
Bacterial Cellulose–Based MOF Hybrid as a Sensitive Switch Off–On Luminescent Sensor for the Selective Recognition of l‑Histidine
In
this study, a stable and luminescent UiO-66-NH2 (UN) and its derivative Cu2+@UN were
prepared and utilized successfully as an Off–On luminescent
sensing platform for effective, selective, as well as rapid (5 min)
detection of l-Histidine (l-His). The UN reveals efficient quenching in the presence of Cu2+ ions
through photoinduced electron transition (PET) mechanism as a dynamic
quenching process (in the range of 0.01–1 mM) forming Cu2+@UN sensing platform. However, due to the remarkable
affinity between l-His and Cu2+, the luminescence
of Cu2+@UN is recovered in the presence of l-His indicating Turn-On behavior via a quencher detachment
mechanism (QD). A good linear relationship between the l-His
concentration and luminescence intensity was observed in the range
of 0.01–40 μM (R2 = 0.9978)
with a detection limit of 7 nM for l-His sensing. The suggested
method was successfully utilized for l-His determination
in real samples with good recoveries and satisfying consequences.
Moreover, the result indicates that only l-His induces a
significant luminescence restoration of Cu2+@UN and that the signal is significantly greater than that of the other
amino acids. Also, the portable test paper based on bacterial cellulose
(BC) as the Cu2+@UNBC sensing platform was
developed to conveniently evaluate the effective detection of l-His