A bis-naphthalimide functionalized pillar[5]arene-based supramolecular pi-gel acts as a multi-stimuli-responsive material

作者：Zhang, You-Ming^*; Li, Yong-Fu; Zhong, Kai-Peng; Qu, Wen-Juan; Yao, Hong; Wei, Tai-Bao; Lin, Qi^*

来源：New Journal of Chemistry, 2018, 42(19): 16167-16173.

DOI：10.1039/c8nj03583k

• FLUORESCENT
• POLYMER
• HOST
• SENSOR
• CONSTRUCTION
• PILLARARENE
• RECOGNITION
• COORDINATION
• ORGANOGELS

In this work, a novel supramolecular pi-gel has been constructed using a naphthalimide functionalized pillar[5]arene-based gelator (MP5). The gelator MP5 simultaneously contains a naphthalimide moiety as the pi...pi interaction site as well as a fluorophore. Interestingly, the MP5-based supramolecular pi-gel (MP5-G) exhibits strong aggregation-induced emission (AIE). MP5-G exhibited good thermal-responsiveness, acid and base-responsiveness and cation and amino acid-responsiveness. Meanwhile, this supramolecular pi-gel also shows selective fluorescence sensing for Fe3+ via cation-pi interactions with high selectivity and sensitivity, and the detection limit of MP5-G for Fe3+ is 6.06 x 10(-8) M. Even more meaningfully, MP5-G could remove Fe3+ from water solution with excellent recyclability and ingestion capacity, and the Fe3+ removal rate can reach up to 99.8%. Furthermore, the Fe3+ coordinated supramolecular gel, MP5-FeG, shows selective fluorescence turn-on sensing for L-Cys. The detection limit of MP5-FeG for L-Cys is 1.0 x 10(-8) M. Simultaneously, thin films based on these supramolecular gels were prepared, which were confirmed to be convenient test kits for detecting Fe3+ and L-Cys. In addition, these supramolecular pi-gels could be used as sensitive ion sensors, sensitive logic gates and fluorescent display materials.

• 出版日期2018-10-7
• 单位西北师范大学