Triple Noncovalent‐Interaction‐Containing Supramolecular Polymer Vesicle Chemosensors with Dynamically Tunable Detection Ranges

Abstract

Chemosensors (CSs) with dynamically tunable detection ranges have important significance for their expansion in practical applications; however, most CSs possess an unchangeable detection limit. In this work, we report the first example of a supramolecular polymer vesicle (SPV) chemosensor with a dynamically tunable detection range. SPVs containing porphyrin (PP) moieties and β-cyclodextrin (β-CD)/azobenzene (Azo) host-guest interactions were first constructed. The obtained SPVs were used to detect Zn with a high selectivity and sensitivity over a wide detection limit range of 8.67×10 to 1.99×10 under UV light irradiation. The corresponding sensing mechanism was attributed to the synergistic effects of the triple noncovalent interactions, including the metal-ligand coordination of PP/Zn and the double host-guest interactions of β-CD/Azo and β-CD/PP.

Long‐Chain Hyperbranched Polymers: Synthesis, Properties, and Applications

“…Chemosensors are defined as a class of molecular devices that can transform chemical stimuli into some form of response, such as electronic, magnetic, or optical signals. Very recently, the first example of LCHBP‐based chemosensors was reported by our group ( Figure ), which was achieved through a kind of LCHBP containing porphyrin moieties and β‐CD/azobenzene host–guest complexes constructed via supramolecular approach. The obtained LCHBPs could assemble into vesicles capable of detecting Zn 2+ with high selectivity and sensitivity over a wide detection limit range under UV light irradiation (Figure ).…”

“…The obtained LCHBPs could assemble into vesicles capable of detecting Zn 2+ with high selectivity and sensitivity over a wide detection limit range under UV light irradiation (Figure ). The working mechanism was further proposed which was attributed to the synergistic effect of triple noncovalent interactions, namely metal–ligand coordination of porphyrin and Zn 2+ , and double host–guest interactions of β‐CD with azobenzene as well as with porphyrin moieties …”

“…Construction of LCHBP vesicle chemosensors via a supramolecular approach and illustration on their sensing process and mechanism. Reproduced with permission . Copyright 2018, John Wiley & Sons.…”

“…A variety of guest molecules including metal nanoparticles, drugs, and imaging agents have been transported with LCHBPs focusing on the stabilization of catalysts, and biomedicine as well as diagnostic purposes . The special molecular constructions of LCHBPs also provide them with promising applications in electrical conductivity and chemical sensing …”

Dynamic Adaptive Two-Dimensional Supramolecular Assemblies for On-Demand Filtration

“…Flexible hyperbranched monomers are good examples to form large-size supramolecular assemblies (Huang and Gibson, 2004, Fernández et al., 2008, Zhou et al., 2010, Dong et al., 2011a, Dong et al., 2011b, Dong et al., 2014, Tao et al., 2012, Fang et al., 2013, Wang et al., 2014) but remain a challenging issue how to precisely construct the dimensions of the assemblies. In many cases, such flexible hyperbranched building blocks tend to self-assemble into spheres or particles because of the flexibility-induced surface curving (Dong et al., 2011a, Dong et al., 2011b, Groombridge et al., 2017, Tian et al., 2017, Datta et al., 2018, Liu et al., 2018). Hence, it is still a fundamental question of whether the 2D supramolecular assemblies with large area can be achieved by the direct solution-phase growth strategies rather than by the self-assembly on interfaces/surfaces.…”