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Robust Mesoporous Functional Hydrogen-Bonded Organic Framework for Hypochlorite Detection.

Zu-Jin Lin1,2,3, Jin-Ying Qin1, Xiao-Ping Zhan1

  • 1College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China.

ACS Applied Materials & Interfaces
|April 28, 2022
PubMed
Summary
This summary is machine-generated.

A novel robust mesoporous hydrogen-bonded organic framework (HOF) exhibits high stability and porosity. This HOF functions as an efficient fluorescent sensor for detecting hypochlorite in water.

Keywords:
functional groupshigh stabilityhydrogen-bonded organic framework (HOF)hypochlorite (ClO−)sensor

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Hydrogen-bonded organic frameworks (HOFs) face challenges including low stability, limited porosity, and difficult functionalization.
  • Developing robust and functional HOFs is crucial for expanding their applications.

Purpose of the Study:

  • To design and synthesize a novel, stable, and porous HOF with abundant functional groups.
  • To explore the potential of this new HOF as a fluorescent sensor for hypochlorite detection.

Main Methods:

  • De novo synthesis of a 3D mesoporous HOF (HOF-FAFU-1) using planar building blocks connected by hydrogen bonds and π-π interactions.
  • Characterization of the HOF's stability across a pH range of 1-9.
  • Utilizing the HOF-FAFU-1 as a fluorescent sensor for hypochlorite detection in aqueous media.

Main Results:

  • HOF-FAFU-1 demonstrates exceptional stability in aqueous solutions (pH 1-9) due to strong intermolecular interactions.
  • The HOF exhibits a high density of free hydroxy moieties, enabling its use as a fluorescent sensor.
  • The sensor shows high efficiency with a broad linear range (0-0.45 mM), fast response (15 s), and a low limit of detection (1.32 μM) for hypochlorite.
  • Fluorescent quenching is attributed to the oxidation of building blocks.

Conclusions:

  • Judicious design of building blocks enables simultaneous realization of high stability, large pores, and high functional group density in HOFs.
  • HOF-FAFU-1 represents a significant advancement in HOF development, extending their application scope, particularly in chemical sensing.