Carbamazepine (CBZ) is a significant marker to reflect human health and anthropogenic pollution to the aqueous system. However, few CBZ chemo-sensors meeting allowable requirements are available in practice. For this...
Isostructural lanthanide coordination
polymers, [Ln(d-DBTA)(d-HDBTA)(H2O)5]
n
(Ln-d-DBTA; d-H2DBTA = d-O,O′-dibenzoyl
tartaric
acid; Ln = La, Ce, Nd, Eu, Gd, and Tb), are synthesized and characterized.
By uniformly doping this amphophilic Ln-d-DBTA into
a poly(methyl methacrylate) (PMMA) matrix, we prepare stable films
with tunable luminescence color, even white-light emission. Except
for providing the blue-light component, the PMMA matrix plays indispensable
roles in dispersing the 1D LnCPs via hydrogen bonds, transferring
electrons to organic ligands by means of photoinduced electron transfer,
and further sensitizing the luminescence of lanthanide ions. Then,
a bifunctional sensing process toward melamine in various dairy products
is conducted in terms of luminescent intensity and color. Consequently,
the as-prepared white-light-emitting film exhibits 0.012 mg/kg limit
of detection and obvious luminescence-color changes from white to
blue. The excellent sensitivity, reliability, selectivity, stability,
competitiveness, and recyclability state the promising practicality
in monitoring quality of dairy products. In this work, using a battery
of experimental techniques and theoretical calculation, we show how
the PMMA matrix connects the LnCPs and promotes their photophysical
properties, what changes have taken place for the energy- and electron-transfer
pathways of the as-prepared chemosensor after adsorbing melamine,
and why this convenient testing material is applicable.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.