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Issue 5, 2019
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Super metal hydrogels constructed from a simple tripodal gelator and rare earth metal ions and its application in highly selective and ultrasensitive detection of histidine

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Abstract

A series of stable super metal hydrogels (TP-Ms, M = Tb3+, Eu3+, La3+ and Ce3+) with a low critical gelation concentration (2.28 × 10−3 M, 0.1%) was successfully constructed by forming hierarchical assemblies of a tripodal gelator (TP) with rare earth metal ions (Tb3+, Eu3+, La3+ and Ce3+). Interestingly, the super metal hydrogels TP-Eu and TP-La show a specific and ultrasensitive response to histidine (His). The addition of a series of amino acids into the metal hydrogels TP-Eu and TP-La showed that only His could induce distinct fluorescent enhancement for TP-Eu and TP-La, while other amino acids did not significantly interfere with the His sensing process. The LODs of super metal–hydrogel TP-Eu and TP-La for His are (1.83–1.94) × 10−9 and (1.83–1.85) × 10−9 M, respectively. In addition, constructing super supramolecular metal hydrogels by hierarchical assemblies of an easily synthesized tripodal gelator and rare earth metal ions is a novel and efficient approach to the design and development of multi-functional super supramolecular metal hydrogel-based materials.

Graphical abstract: Super metal hydrogels constructed from a simple tripodal gelator and rare earth metal ions and its application in highly selective and ultrasensitive detection of histidine

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Publication details

The article was received on 13 Nov 2018, accepted on 03 Jan 2019 and first published on 03 Jan 2019


Article type: Paper
DOI: 10.1039/C8SM02319K
Citation: Soft Matter, 2019,15, 999-1004

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    Super metal hydrogels constructed from a simple tripodal gelator and rare earth metal ions and its application in highly selective and ultrasensitive detection of histidine

    J. Liu, Y. Fan, Q. Zhang, H. Yao, Y. Zhang, T. Wei and Q. Lin, Soft Matter, 2019, 15, 999
    DOI: 10.1039/C8SM02319K

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