Silica cross-linked nanoparticles encapsulating phenothiazine-derived Schiff base for discrimination of Fe (Ⅱ)and Fe (Ⅲ) in aqueous media
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.
Fangyuan Gai Xiang Li Yunling Liu Qisheng Huo
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012
国内会议
宁波
英文
1250-1271
2014-11-11（万方平台首次上网日期，不代表论文的发表时间）