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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
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Triple Noncovalent-Interaction-Containing Supramolecular Polymer Vesicle Chemosensors with Dynamically Tunable

Tingting Liu1, Shuodong Wang1, Yanran Li1

  • 1MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shanxi Key Laboratory of, Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710072, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 8, 2018
PubMed
Summary

This study introduces the first supramolecular polymer vesicle (SPV) chemosensor with a tunable detection range. This novel chemosensor demonstrates high selectivity and sensitivity for detecting zinc ions (Zn2+) across a broad concentration spectrum.

Keywords:
host-guest interactionsself-assemblysensorssupramolecular polymersvesicles

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Area of Science:

  • Supramolecular chemistry
  • Analytical chemistry
  • Materials science

Background:

  • Chemosensors (CSs) are crucial for detecting analytes, but most have fixed detection limits.
  • Developing chemosensors with dynamically tunable detection ranges is essential for broader practical applications.

Purpose of the Study:

  • To report the first supramolecular polymer vesicle (SPV) chemosensor with a dynamically tunable detection range.
  • To demonstrate the SPV's capability for selective and sensitive detection of zinc ions (Zn2+).

Main Methods:

  • Construction of SPVs incorporating porphyrin (PP) moieties and β-cyclodextrin (β-CD)/azobenzene (Azo) host-guest interactions.
  • Utilizing UV light irradiation to modulate the SPV's properties.
  • Investigating the sensing mechanism based on noncovalent interactions.

Main Results:

  • The developed SPVs exhibited a dynamically tunable detection range for Zn2+ from 8.67×10^-9 to 1.99×10^-11 M.
  • The chemosensor demonstrated high selectivity and sensitivity towards Zn2+.
  • The sensing mechanism involves synergistic triple noncovalent interactions: PP/Zn2+ coordination and β-CD/Azo & β-CD/PP host-guest interactions.

Conclusions:

  • Supramolecular polymer vesicles offer a promising platform for developing chemosensors with tunable detection capabilities.
  • The synergistic effect of multiple noncovalent interactions enables precise control over sensing performance.
  • This work paves the way for advanced chemosensor designs with adaptable detection limits.