A novel supramolecular polymer gel based on naphthalimide functionalized- pillar[5] arene for the fluorescence detection of Hg2+ and I- and recyclable removal of Hg2+ via cation-pi interactions

作者：Lin, Qi^*; Mao, Peng-Peng; Fan, Yan-Qing; Liu, Lu; Liu, Juan^*; Zhang, You-Ming; Yao, Hong; Wei, Tai-Bao^*

来源：Soft Matter, 2017, 13(39): 7085-7089.

DOI：10.1039/c7sm01447c

• METAL-ORGANIC FRAMEWORKS
• HOST-GUEST COMPLEXATION
• SELECTIVE DETECTION
• FACILE REMOVAL
• MERCURY
• WATER
• STRATEGY
• IONS
• CONSTRUCTION
• HYDROGELS

The development of novel materials for the detection and removal of Hg2+ is a very important issue due to the acute toxicity of Hg2+. Herein, a novel supramolecular polymer P5BD-DPHB has been constructed by the collaboration of a naphthalimide functionalized-pillar[5] arene host (P5BD) and a bis-bromohexane functionalized-pillar[5] arene guest (DPHB). P5BD-DPHB could form a stable supramolecular gel (P5BD-DPHB-G). Interestingly, P5BD-DPHB-G shows selective fluorescent "turn-on'' detection for Hg2+ via cation-p interactions with high selectivity and sensitivity. Furthermore, the Hg2+ coordinated supramolecular gel P5BD-DPHB-HgG can detect I- successively. The detection limits for Hg2+ and I- are 1.65 x 10(-9) and 1.84 x 10(-8) mol L-1, respectively. Even more significantly, the xerogel of P5BD-DPHB-G could remove Hg2+ from aqueous solution with excellent recyclability and ingestion capacity, and with a Hg2+ removal rate of 98%.

• 出版日期2017-10-21
• 单位西北师范大学; 西北民族大学