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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Double-Color Lanthanide Metal-Organic Framework Based Logic Device and Visual Ratiometric Fluorescence Water

Long Yu1, Qutong Zheng1, Heng Wang1

  • 1Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), and Wuhan University School of Pharmaceutical Sciences , Wuhan 430071 , China.

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|December 14, 2019
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Summary
This summary is machine-generated.

A new lanthanide metal-organic framework (MOF) acts as a highly sensitive fluorescent sensor for detecting water content in pharmaceuticals. This innovation enables rapid, visual water assays for solid samples using a paper-based microsensor.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Chemical Engineering

Background:

  • Water is a common contaminant in pharmaceuticals and chemical products.
  • Accurate water content determination is crucial for quality control in these industries.
  • Existing water assay methods can be time-consuming or lack sensitivity.

Purpose of the Study:

  • To develop a novel, ultrasensitive, and rapid method for water detection in pharmaceuticals.
  • To create a double-color ratiometric fluorescent sensor based on a lanthanide metal-organic framework (MOF).
  • To design a portable, visual assay device for on-site water content determination.

Main Methods:

  • Synthesis of a lanthanide MOF, Eu-dipicolinic acid/2-aminophthalic acid (Eu-DPA/PTA-NH2), as a fluorescent sensor.
  • Development of a one-to-two logic gate analytical device utilizing fluorescence responses.
  • Fabrication of a paper-based microsensor for visual water detection in solid pharmaceuticals.

Main Results:

  • The developed MOF sensor exhibits ultrasensitive (LOD 0.01% v/v) and broad-range (0-100% v/v) linear response to water.
  • The analytical device successfully performs direct water content analysis using logic gate outputs.
  • The paper-based microsensor provides rapid (20 s), stable (30+ days), and accurate (<9.8% error) visual water assays for solid pharmaceuticals.

Conclusions:

  • This study presents the first MOF-based double-color ratiometric fluorescent water sensor.
  • An innovative water analytical logic device and a paper-based microsensor for visual water assay were successfully developed.
  • The developed technology offers a promising solution for rapid, point-of-care visual water determination in solid pharmaceutical samples.