Rhodamine-Anchored Polyacrylamide Hydrogel for Fluorescent Naked-Eye Sensing of Fe 3 .
Dandan JiangMinghao ZhengXiaofan MaYingzhen ZhangShaohua JiangJuanhua LiChunmei ZhangKunming LiuLiqing LiPublished in: Molecules (Basel, Switzerland) (2023)
A fluorescent and colorimetric poly (acrylamide)-based copolymer probe P(AAm-co-RBNCH) has been designed via free radical polymerization of a commercial acrylamide monomer with a rhodamine-functionalized monomer RBNCH . Metal ion selectivity of RBNCH was investigated by fluorescence and colorimetric spectrophotometry. Upon addition of Fe 3+ , a visual color change from colorless to red and a large fluorescence enhancement were observed for the ring-opening of the rhodamine spirolactam mechanism. The monomer gives a sensitive method for quantitatively detecting Fe 3+ in the linear range of 100-200 μM, with a limit of detection as low as 27 nM and exhibiting high selectivity for Fe 3+ over 12 other metal ions. The hydrogel sensor was characterized by FTIR, and the effects of RBNCH amount on gel content and swelling properties were explored. According to the recipe of 1.0 mol% RBNCH to the total monomers, the fabricated hydrogel sensor displayed a good swelling property and reversibility performance and has potential for application in the imaging of Fe 3+ level in industrial wastewater.
Keyphrases
- fluorescent probe
- living cells
- aqueous solution
- quantum dots
- drug delivery
- molecularly imprinted
- hyaluronic acid
- gold nanoparticles
- metal organic framework
- single molecule
- sensitive detection
- label free
- wound healing
- wastewater treatment
- hydrogen peroxide
- energy transfer
- high resolution
- tissue engineering
- heavy metals
- photodynamic therapy
- mass spectrometry
- risk assessment
- nitric oxide
- climate change
- human health
- drug release
- tandem mass spectrometry
- simultaneous determination