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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

366
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
366
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

946
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
946
Photoluminescence: Applications01:14

Photoluminescence: Applications

387
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...
387
Effects of EDTA on End-Point Detection Methods01:18

Effects of EDTA on End-Point Detection Methods

272
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
272
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

565
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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Related Experiment Video

Updated: Jun 26, 2025

Screening for Thermotoga maritima Membrane-Bound Pyrophosphatase Inhibitors
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Selective pyrophosphate detection via metal complexes.

Xiao Zhang1, Wenwen Sun1, Le Wang1

  • 1College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.

Iradiology
|May 13, 2024
PubMed
Summary
This summary is machine-generated.

This review explores fluorescent pyrophosphate (PPi) sensors, highlighting metal complexes as promising alternatives to costly enzymes for improved PPi detection and imaging in biological and disease processes.

Keywords:
FluorescenceImagingMetal ComplexPyrophosphate (PPi)Sensor

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Molecular Biology

Background:

  • Pyrophosphate (PPi) anions are vital in biological energy conversion, enzymatic reactions, and metabolic regulation.
  • PPi serves as a significant biomarker for various disease-related processes.
  • Current commercial pyrophosphate sensors are limited by high cost, poor selectivity, instability, and incompatibility with imaging.

Purpose of the Study:

  • To review the current landscape of pyrophosphate sensing technologies.
  • To focus on metal complex-based fluorescent sensors for PPi detection.
  • To analyze sensor designs, mechanisms, selectivities, and detection limits.

Main Methods:

  • Literature review of pyrophosphate sensing strategies.
  • Analysis of metal complex-based fluorescent sensors for PPi.
  • Evaluation of sensor performance metrics including selectivity and detection limits.

Main Results:

  • Metal complexes offer a viable alternative to enzyme-based PPi sensors.
  • Various metal complex designs exhibit distinct sensing mechanisms for PPi.
  • Key performance indicators like selectivity and detection limits vary among different sensor types.

Conclusions:

  • Metal complex-based fluorescent sensors show potential for improved PPi detection and imaging.
  • Further development is needed to overcome limitations in selectivity, stability, and practical application.
  • Future research should focus on advancing PPi detection and imaging capabilities.