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. Issue 5 (18th January 2019)

• Record Type: Journal Article
• Authors: Liu, Juan; Fan, Yan-Qing; Zhang, Qin-Peng; Yao, Hong; Zhang, You-Ming; Wei, Tai-Bao; Lin, Qi
• Is Part Of: Soft matter. Volume 15:Issue 5(2019)
• Page Start: 999
• Page End: 1004
• Publication Date: 2019-01-18
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c8sm02319k
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : A series of easily synthesized multi-functional super supramolecular metal hydrogel materials with high selectivity and ultrasensitivity are presented. Abstract : A series of stable super metal hydrogels (TP-Ms, M = Tb 3+, Eu 3+, La 3+ and Ce 3+ ) 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 (Tb 3+, Eu 3+, La 3+ and Ce 3+ ). Interestingly, the super metal hydrogelsTP-Eu andTP-La show a specific and ultrasensitive response to histidine (His). The addition of a series of amino acids into the metal hydrogelsTP-Eu andTP-La showed that only His could induce distinct fluorescent enhancement forTP-Eu andTP-La, while other amino acids did not significantly interfere with the His sensing process. The LODs of super metal–hydrogelTP-Eu andTP-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.