【摘 要】
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This work demonstrated that water-soluble fluorescent hybrid materials can be successfully synthesized by use of silica cross-linked micellar nanoparticles(SCMNPs) as scaffolds to encapsulate phenothi
【机 构】
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State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin U
【出 处】
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2014年全国博士后新材料技术与应用学术论坛
论文部分内容阅读
This work demonstrated that water-soluble fluorescent hybrid materials can be successfully synthesized by use of silica cross-linked micellar nanoparticles(SCMNPs) as scaffolds to encapsulate phenothiazine-derived Schiff base (EDDP) for the discrimination of Fe2+ and Fe3+.In organic solvent, EDDP shows fluorescence quenching and red-shift by lewis acid effect of Fe3+ or Fe2+ which cause the hydrolysis reaction of Schiff base.EDDP encapsulated inside SCMNPs (EDDP-SCMNPs) exhibited a high selectively fluorescence quenching by Fe3+ in aqueous media which exhibit electron transfer (ET) from EDDP in the core to Fe3+ outer the shell.Interestingly,EDDP-SCMNPs exhibit no sensing ability of Fe2+ due to the weak electron-accepting of Fe2+.The mechanism and result of Fe3+ sensing by EDDP-SCMNPs was verified and explained using UV-absorption, fluorescence emission and 3D fluorescence spectra which suggested a strong electron-accepting ability of Fe3+ in SCMNPs sensing system.Significantly, because of the ultrasmall size, nontoxity and biocompatibility of EDDP-SCMNPs which can protect the emitting of EDDP in aqueous media, this material exhibit promising features in the use of biological system.
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