A simple
and efficient approach to endow the controllable multi-stimuli-responsive
property for the supramolecular polymer was successfully developed
by rationally introducing iodine into a novel naphthalimide-functionalized
pillar[5]arene-based supramolecular polymer (PNA⊃GBP). Interestingly,
by introducing iodine into the supramolecular polymer PNA⊃GBP,
the iodine could not only control the optical properties and self-assembly
states of PNA⊃GBP via electronic donor–acceptor effect
but also control the molecular recognition properties by competitive
redox reaction. Benefiting from these excellent iodine controlled
multiresponse properties, the PNA⊃GBP showed selective fluorescent
response for cyanide, cysteine, and mercury in supramolecular polymer
gels, water solutions, and living cells with high sensitivities. The
supramolecular polymer PNA⊃GBP could act as a novel smart material
for selective detection CN–, Hg2+, and l-Cys.
A fast and selective method was developed for the determination of sulfonamides (SAs) in honey based on magnetic molecularly imprinted polymer. The extraction was carried out by blending and stirring the sample, extraction solvent and polymers. When the extraction was complete, the polymers, along with the captured analytes, were easily separated from the sample matrix by an adscititious magnet. The analytes eluted from the polymers were determined by liquid chromatography-tandem mass spectrometry. Under the optimal conditions, the detection limits of SAs are in the range of 1.5-4.3 ng g(-1). The relative standard deviations of intra- and interday ranging from 3.7% to 7.9% and from 4.3% to 9.9% are obtained, respectively. The proposed method was successfully applied to determine SAs including sulfadiazine, sulfamerazine, sulfamethoxydiazine, sulfamonomethoxine, sulfadimethoxine, sulfamethoxazole and sulfaquinoxaline in different honey samples. The recoveries of SAs in these samples from 67.1% to 93.6% were obtained.
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