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Related Concept Videos

Crown Ethers02:36

Crown Ethers

5.8K
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules...
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Structure and Nomenclature of Ethers02:28

Structure and Nomenclature of Ethers

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Structure and Bonding
Ethers are organic compounds with an ether functional group which is characterized by an oxygen atom connected to two — identical or different — alkyl, aryl, or vinyl groups. The C–O–C linkage in dimethyl ether — the simplest ether — has an approximately tetrahedral bond angle of 110.3 degrees. The oxygen atom is sp3- hybridized, with the C–O distance being about 140 pm.
Classification of Ethers
Based on their attached substituent...
13.8K

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Related Experiment Video

Updated: Nov 30, 2025

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
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Beryllium-Ion-Selective PEDOT Solid Contact Electrode Based on 9,10-Dinitrobenzo-9-Crown-3-Ether.

Junghwan Kim1, Dae Hee Kim1, Jin Cheol Yang1

  • 1Central customs Laboratory and Scientific Service, Gyeongnam, Jinju 52851, Korea.

Sensors (Basel, Switzerland)
|November 13, 2020
PubMed
Summary

A novel solid-contact electrode for beryllium(II) ion detection was developed using poly(ethylenedioxythiophene) (PEDOT) and a crown ether ionophore. This electrode offers high selectivity and a low detection limit for sensitive beryllium analysis.

Keywords:
all-solid-state electrodeberylliumconducting polymercrown ethersensor

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Development of selective solid-contact electrodes is crucial for accurate ion detection.
  • Poly(ethylenedioxythiophene) (PEDOT) offers advantageous conductive properties for electrode fabrication.
  • Crown ether derivatives are effective ionophores for selective metal ion recognition.

Discussion:

  • The study details the fabrication and optimization of a beryllium(II)-ion-selective electrode.
  • Performance was evaluated using potentiometry, conductance measurements, chronopotentiometry, and electrochemical impedance spectroscopy (EIS).
  • Optimized ion-selective membrane (ISM) composition includes 3% ionophore, 30% polyvinylchloride (PVC), 64% o-nitro phenyl octyl ether (o-NPOE), and 3% sodium tetraphenylborate (NaTPB).

Key Insights:

  • The developed electrode demonstrates a wide working concentration range (10-2.5-10-7.0 M) and pH range (2.0-9.0).
  • Achieved a Nernstian slope of 29.5 mV/D for beryllium (II) ions with a detection limit of 10-7.0 M.
  • Exhibits excellent selectivity for beryllium(II) ions against various other metal ions.

Outlook:

  • This electrode holds potential for sensitive and selective beryllium monitoring in environmental and biological samples.
  • Further research could explore modifications for enhanced long-term stability and broader applicability.
  • The integration of PEDOT in solid-contact electrodes opens avenues for advanced electrochemical sensor development.