Novel fluorescent supramolecular polymer metallogel based on Al3+ coordinated cross‐linking of quinoline functionalized‐ pillar[5]arene act as multi‐stimuli‐responsive materials

• Published in: Applied organometallic chemistry 2020-04, Vol.34 (4), p.n/a
• Main Authors: He, Jun‐Xia, Zhang, You‐Ming, Hu, Jian‐Peng, Li, Ying‐Jie, Zhang, Qi, Qu, Wen‐Juan, Yao, Hong, Wei, Tai‐Bao, Lin, Qi
• Format: Article
• Language: English
• Subjects: aggregation induced emission; supramolecular polymer metallogelstimuli‐responsive fluorescent materialpillararene
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.5519

A novel supramolecular polymer metallogel (QP5‐AlG) has been constructed by cross‐linking of bis‐8‐hydroxyquinoline functionalized pillar[5]arene with Al3+. The metallogel QP5‐AlG shows light blue aggregation induced emission (AIE) in DMSO/H2O binary solution. Interestingly, the QP5‐AlG shown multiple external stimuli‐responsive behaviors such as temperature, guest compounds, acid, base and so on. The QP5‐AlG can be used as a fluorescent material for detection of Fe3+, F‐, trifluoroacetic acid (TFA) and triethylamine (TEA) by different fluorescence states (“on” or “off”). The (limits of lowest detection) LOQs of the QP5‐AlG for Fe3+, F‐, TFA and TEA are in the range of 4.39 × 10‐9‐1.82 × 10‐7 M. More interestingly, a QP5‐AlG‐based rewritable and erasable fluorescent platform was demonstrated, which offers a potential testbed for performing “write‐erase‐write” cycles multiple times. This study provides insight into the development of novel multifunctional supramolecular materials. Novel supramolecular polymer metallogel QP5‐AlG was constructed by cross‐linking of bis‐8‐hydroxyquinoline functionalized pillar[5]arene with Al3+. Interestingly, the QP5‐AlG can act as a stimuli‐responsive fluorescent material.