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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
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An Aptamer-based Sensor for Unchelated GadoliniumIII
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Sensitive Current Sensor Based on a Lanthanide Framework with Lewis Basic Bipyridyl Sites for Cu

Chenglong Liang1,2, Shiyi Tan1,3, Lixiong Shao1

  • 1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, P. R. China.

Inorganic Chemistry
|June 9, 2023
PubMed
Summary

A novel Ytterbium-based metal-organic framework, ACBP-6, was synthesized and developed into a highly selective sensor. This new material detects Cu2+ ions with a low detection limit, showcasing its potential in environmental monitoring.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) offer tunable properties for various applications.
  • Developing MOFs with accessible Lewis basic sites is crucial for selective ion coordination.
  • Ytterbium-based MOFs are emerging materials with unique characteristics.

Purpose of the Study:

  • To synthesize a new Yb-based 3D MOF with free Lewis basic sites.
  • To investigate the potential of this MOF as a sensor for metal ion detection.
  • To evaluate the selectivity and sensitivity of the developed sensor.

Main Methods:

  • Solvothermal synthesis of the Yb-based MOF, ACBP-6, using YbCl3 and H2ddbpdc.
  • In situ growth of ACBP-6 within a glass micropipette to form a sensor.
  • Electrochemical measurements for Cu2+ detection and analysis of sensor performance.

Main Results:

  • A novel 3D Yb-based MOF, [Yb2(ddbpdc)3(CH3OH)2] (ACBP-6), was successfully synthesized.
  • The MOF features unoccupied bipyridyl N atoms, providing accessible Lewis basic sites.
  • The ACBP-6 based sensor demonstrated high selectivity and a high signal-to-noise ratio for Cu2+ detection, with a limit of detection of 1 μM.

Conclusions:

  • The synthesized Yb-based MOF, ACBP-6, possesses suitable properties for sensor development.
  • The unoccupied Lewis basic sites are key to the selective coordination with Cu2+ ions.
  • The ACBP-6 based sensor offers a promising approach for sensitive and selective detection of Cu2+.